/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_popl20-nonblocking-cntr-alt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:48:09,225 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:48:09,308 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:48:09,315 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:48:09,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:48:09,316 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:48:09,316 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:48:09,344 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:48:09,345 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:48:09,348 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:48:09,349 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:48:09,349 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:48:09,349 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:48:09,351 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:48:09,351 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:48:09,351 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:48:09,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:48:09,351 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:48:09,352 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:48:09,352 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:48:09,352 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:48:09,352 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:48:09,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:48:09,353 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:48:09,354 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:48:09,354 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:48:09,354 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:48:09,355 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:48:09,355 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:48:09,355 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:48:09,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:48:09,356 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:48:09,356 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:48:09,356 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:48:09,356 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:48:09,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:48:09,357 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:48:09,357 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:48:09,357 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:48:09,357 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:48:09,357 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:48:09,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:48:09,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:48:09,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:48:09,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:48:09,641 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:48:09,641 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:48:09,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr-alt.wvr_bound2.c [2023-08-03 20:48:11,311 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:48:11,511 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:48:11,511 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr-alt.wvr_bound2.c [2023-08-03 20:48:11,518 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b2aaf23f/3017510cb7cd424fb3295468b65cd7ad/FLAGa8723433e [2023-08-03 20:48:11,529 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b2aaf23f/3017510cb7cd424fb3295468b65cd7ad [2023-08-03 20:48:11,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:48:11,532 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:48:11,533 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:48:11,533 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:48:11,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:48:11,539 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a70459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11, skipping insertion in model container [2023-08-03 20:48:11,540 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,562 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:48:11,694 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_popl20-nonblocking-cntr-alt.wvr_bound2.c[2260,2273] [2023-08-03 20:48:11,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:48:11,703 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:48:11,721 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_popl20-nonblocking-cntr-alt.wvr_bound2.c[2260,2273] [2023-08-03 20:48:11,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:48:11,728 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:48:11,728 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:48:11,734 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:48:11,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11 WrapperNode [2023-08-03 20:48:11,735 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:48:11,736 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:48:11,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:48:11,736 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:48:11,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,765 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2023-08-03 20:48:11,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:48:11,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:48:11,766 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:48:11,766 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:48:11,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,776 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,777 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,782 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,785 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,790 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,791 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,794 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:48:11,794 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:48:11,794 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:48:11,795 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:48:11,795 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (1/1) ... [2023-08-03 20:48:11,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:48:11,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:11,834 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 20:48:11,853 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 20:48:11,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:48:11,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:48:11,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:48:11,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:48:11,870 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:48:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:48:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:48:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:48:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:48:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:48:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:48:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:48:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:48:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:48:11,874 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 20:48:11,971 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:48:11,972 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:48:12,167 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:48:12,209 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:48:12,209 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 20:48:12,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:48:12 BoogieIcfgContainer [2023-08-03 20:48:12,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:48:12,213 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:48:12,213 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:48:12,216 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:48:12,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:48:11" (1/3) ... [2023-08-03 20:48:12,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f07254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:48:12, skipping insertion in model container [2023-08-03 20:48:12,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:48:11" (2/3) ... [2023-08-03 20:48:12,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f07254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:48:12, skipping insertion in model container [2023-08-03 20:48:12,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:48:12" (3/3) ... [2023-08-03 20:48:12,219 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-nonblocking-cntr-alt.wvr_bound2.c [2023-08-03 20:48:12,225 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:48:12,231 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:48:12,232 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:48:12,232 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:48:12,288 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 20:48:12,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 244 flow [2023-08-03 20:48:12,422 INFO L124 PetriNetUnfolderBase]: 33/248 cut-off events. [2023-08-03 20:48:12,422 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:48:12,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 248 events. 33/248 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 801 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-03 20:48:12,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 111 transitions, 244 flow [2023-08-03 20:48:12,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 111 transitions, 244 flow [2023-08-03 20:48:12,448 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:48:12,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 111 transitions, 244 flow [2023-08-03 20:48:12,463 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 111 transitions, 244 flow [2023-08-03 20:48:12,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 244 flow [2023-08-03 20:48:12,517 INFO L124 PetriNetUnfolderBase]: 33/248 cut-off events. [2023-08-03 20:48:12,518 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:48:12,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 248 events. 33/248 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 801 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-08-03 20:48:12,526 INFO L119 LiptonReduction]: Number of co-enabled transitions 2052 [2023-08-03 20:48:14,782 INFO L134 LiptonReduction]: Checked pairs total: 2558 [2023-08-03 20:48:14,783 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-03 20:48:14,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:48:14,814 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;@7dfb0248, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:48:14,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:48:14,817 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:48:14,817 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-03 20:48:14,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:48:14,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:14,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 20:48:14,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:14,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:14,822 INFO L85 PathProgramCache]: Analyzing trace with hash 425217932, now seen corresponding path program 1 times [2023-08-03 20:48:14,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:14,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994106629] [2023-08-03 20:48:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:14,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:15,034 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 20:48:15,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:15,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994106629] [2023-08-03 20:48:15,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994106629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:15,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:48:15,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:48:15,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543137291] [2023-08-03 20:48:15,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:15,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:48:15,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:15,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:48:15,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:48:15,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 206 [2023-08-03 20:48:15,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 20:48:15,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:15,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 206 [2023-08-03 20:48:15,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:15,196 INFO L124 PetriNetUnfolderBase]: 260/420 cut-off events. [2023-08-03 20:48:15,196 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 20:48:15,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 420 events. 260/420 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1599 event pairs, 86 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 692. Up to 390 conditions per place. [2023-08-03 20:48:15,200 INFO L140 encePairwiseOnDemand]: 202/206 looper letters, 24 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 20:48:15,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 138 flow [2023-08-03 20:48:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:48:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:48:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-08-03 20:48:15,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48220064724919093 [2023-08-03 20:48:15,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-08-03 20:48:15,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-08-03 20:48:15,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:15,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-08-03 20:48:15,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 20:48:15,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 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 20:48:15,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 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 20:48:15,227 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 82 flow. Second operand 3 states and 298 transitions. [2023-08-03 20:48:15,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 138 flow [2023-08-03 20:48:15,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:48:15,231 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 88 flow [2023-08-03 20:48:15,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-03 20:48:15,235 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-03 20:48:15,236 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 88 flow [2023-08-03 20:48:15,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 20:48:15,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:15,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 20:48:15,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:48:15,237 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] === [2023-08-03 20:48:15,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash 323068016, now seen corresponding path program 1 times [2023-08-03 20:48:15,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:15,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021294139] [2023-08-03 20:48:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:15,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:48:15,266 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:48:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:48:15,297 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:48:15,298 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:48:15,299 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 20:48:15,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 20:48:15,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 20:48:15,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:48:15,306 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:48:15,309 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:48:15,309 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:48:15,343 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 20:48:15,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 134 transitions, 316 flow [2023-08-03 20:48:15,425 INFO L124 PetriNetUnfolderBase]: 134/811 cut-off events. [2023-08-03 20:48:15,426 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:48:15,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 811 events. 134/811 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4066 event pairs, 1 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 481. Up to 32 conditions per place. [2023-08-03 20:48:15,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 134 transitions, 316 flow [2023-08-03 20:48:15,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 134 transitions, 316 flow [2023-08-03 20:48:15,434 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:48:15,434 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 134 transitions, 316 flow [2023-08-03 20:48:15,434 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 134 transitions, 316 flow [2023-08-03 20:48:15,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 134 transitions, 316 flow [2023-08-03 20:48:15,498 INFO L124 PetriNetUnfolderBase]: 134/811 cut-off events. [2023-08-03 20:48:15,498 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:48:15,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 811 events. 134/811 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4066 event pairs, 1 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 481. Up to 32 conditions per place. [2023-08-03 20:48:15,513 INFO L119 LiptonReduction]: Number of co-enabled transitions 5028 [2023-08-03 20:48:17,629 INFO L134 LiptonReduction]: Checked pairs total: 7687 [2023-08-03 20:48:17,629 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-03 20:48:17,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:48:17,632 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;@7dfb0248, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:48:17,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:48:17,634 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:48:17,634 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-03 20:48:17,634 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:48:17,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:17,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 20:48:17,635 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:17,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash 674076118, now seen corresponding path program 1 times [2023-08-03 20:48:17,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:17,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785573081] [2023-08-03 20:48:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:17,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:17,671 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 20:48:17,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:17,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785573081] [2023-08-03 20:48:17,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785573081] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:17,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:48:17,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:48:17,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390953729] [2023-08-03 20:48:17,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:17,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:48:17,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:48:17,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:48:17,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 240 [2023-08-03 20:48:17,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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 20:48:17,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:17,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 240 [2023-08-03 20:48:17,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:18,427 INFO L124 PetriNetUnfolderBase]: 8526/11037 cut-off events. [2023-08-03 20:48:18,428 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2023-08-03 20:48:18,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22380 conditions, 11037 events. 8526/11037 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 47474 event pairs, 3472 based on Foata normal form. 0/6248 useless extension candidates. Maximal degree in co-relation 6836. Up to 10600 conditions per place. [2023-08-03 20:48:18,505 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 35 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-03 20:48:18,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 216 flow [2023-08-03 20:48:18,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:48:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:48:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-03 20:48:18,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-08-03 20:48:18,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-03 20:48:18,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-03 20:48:18,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:18,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-03 20:48:18,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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 20:48:18,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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 20:48:18,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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 20:48:18,516 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 348 transitions. [2023-08-03 20:48:18,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 216 flow [2023-08-03 20:48:18,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:48:18,520 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 146 flow [2023-08-03 20:48:18,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-03 20:48:18,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-03 20:48:18,522 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 146 flow [2023-08-03 20:48:18,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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 20:48:18,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:18,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:18,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:48:18,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:18,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:18,523 INFO L85 PathProgramCache]: Analyzing trace with hash 301605080, now seen corresponding path program 1 times [2023-08-03 20:48:18,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:18,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195467433] [2023-08-03 20:48:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:18,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:48:18,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:18,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195467433] [2023-08-03 20:48:18,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195467433] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:18,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949765944] [2023-08-03 20:48:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:18,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:18,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:18,637 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 20:48:18,650 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 20:48:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:18,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:48:18,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:48:18,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:18,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949765944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:18,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:18,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 20:48:18,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425565425] [2023-08-03 20:48:18,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:18,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:48:18,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:48:18,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:18,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 240 [2023-08-03 20:48:18,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 20:48:18,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:18,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 240 [2023-08-03 20:48:18,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:19,556 INFO L124 PetriNetUnfolderBase]: 8488/11053 cut-off events. [2023-08-03 20:48:19,556 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2023-08-03 20:48:19,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22377 conditions, 11053 events. 8488/11053 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 49748 event pairs, 3438 based on Foata normal form. 0/6301 useless extension candidates. Maximal degree in co-relation 22347. Up to 10389 conditions per place. [2023-08-03 20:48:19,620 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 40 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-03 20:48:19,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 246 flow [2023-08-03 20:48:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:48:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:48:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-03 20:48:19,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-08-03 20:48:19,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-03 20:48:19,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-03 20:48:19,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:19,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-03 20:48:19,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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 20:48:19,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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 20:48:19,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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 20:48:19,625 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 146 flow. Second operand 3 states and 351 transitions. [2023-08-03 20:48:19,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 246 flow [2023-08-03 20:48:19,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:19,630 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 156 flow [2023-08-03 20:48:19,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-03 20:48:19,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-03 20:48:19,632 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 156 flow [2023-08-03 20:48:19,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 20:48:19,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:19,633 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 20:48:19,643 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 20:48:19,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:19,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:19,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:19,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1157233180, now seen corresponding path program 1 times [2023-08-03 20:48:19,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:19,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275931379] [2023-08-03 20:48:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:19,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:48:19,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:19,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275931379] [2023-08-03 20:48:19,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275931379] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:19,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259194649] [2023-08-03 20:48:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:19,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:19,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:19,919 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 20:48:19,923 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 20:48:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:19,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:48:19,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:48:20,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:20,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259194649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:20,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:20,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 20:48:20,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137947777] [2023-08-03 20:48:20,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:20,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:20,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:20,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:48:20,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 240 [2023-08-03 20:48:20,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 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 20:48:20,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:20,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 240 [2023-08-03 20:48:20,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:20,746 INFO L124 PetriNetUnfolderBase]: 8464/11017 cut-off events. [2023-08-03 20:48:20,746 INFO L125 PetriNetUnfolderBase]: For 1133/1133 co-relation queries the response was YES. [2023-08-03 20:48:20,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22577 conditions, 11017 events. 8464/11017 cut-off events. For 1133/1133 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 49469 event pairs, 2427 based on Foata normal form. 9/6430 useless extension candidates. Maximal degree in co-relation 6914. Up to 10492 conditions per place. [2023-08-03 20:48:20,808 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-03 20:48:20,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 257 flow [2023-08-03 20:48:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:48:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:48:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2023-08-03 20:48:20,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608333333333333 [2023-08-03 20:48:20,810 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2023-08-03 20:48:20,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2023-08-03 20:48:20,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:20,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2023-08-03 20:48:20,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 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 20:48:20,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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 20:48:20,815 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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 20:48:20,815 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 156 flow. Second operand 5 states and 553 transitions. [2023-08-03 20:48:20,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 257 flow [2023-08-03 20:48:20,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 248 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:48:20,818 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 165 flow [2023-08-03 20:48:20,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-03 20:48:20,819 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2023-08-03 20:48:20,819 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 165 flow [2023-08-03 20:48:20,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 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 20:48:20,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:20,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:20,825 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 20:48:21,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:21,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:21,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:21,026 INFO L85 PathProgramCache]: Analyzing trace with hash -425450266, now seen corresponding path program 1 times [2023-08-03 20:48:21,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:21,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201840795] [2023-08-03 20:48:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:21,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:21,065 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 20:48:21,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:21,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201840795] [2023-08-03 20:48:21,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201840795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:21,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372345065] [2023-08-03 20:48:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:21,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:21,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:21,067 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 20:48:21,091 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 20:48:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:21,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:48:21,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:21,145 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 20:48:21,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:21,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372345065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:21,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:21,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 20:48:21,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464777583] [2023-08-03 20:48:21,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:21,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:48:21,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:21,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:48:21,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:21,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 240 [2023-08-03 20:48:21,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 20:48:21,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:21,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 240 [2023-08-03 20:48:21,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:21,734 INFO L124 PetriNetUnfolderBase]: 7233/9555 cut-off events. [2023-08-03 20:48:21,734 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2023-08-03 20:48:21,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19560 conditions, 9555 events. 7233/9555 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 43515 event pairs, 2468 based on Foata normal form. 0/5681 useless extension candidates. Maximal degree in co-relation 6706. Up to 6763 conditions per place. [2023-08-03 20:48:21,793 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 48 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 20:48:21,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 303 flow [2023-08-03 20:48:21,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:48:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:48:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-03 20:48:21,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2023-08-03 20:48:21,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-03 20:48:21,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-03 20:48:21,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:21,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-03 20:48:21,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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 20:48:21,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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 20:48:21,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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 20:48:21,799 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 165 flow. Second operand 3 states and 357 transitions. [2023-08-03 20:48:21,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 303 flow [2023-08-03 20:48:21,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 296 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:48:21,803 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 170 flow [2023-08-03 20:48:21,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-03 20:48:21,806 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-03 20:48:21,806 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 170 flow [2023-08-03 20:48:21,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 20:48:21,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:21,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:21,815 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 20:48:22,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:22,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:22,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:22,013 INFO L85 PathProgramCache]: Analyzing trace with hash 909840138, now seen corresponding path program 1 times [2023-08-03 20:48:22,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:22,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002809052] [2023-08-03 20:48:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:22,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:22,061 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 20:48:22,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:22,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002809052] [2023-08-03 20:48:22,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002809052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:22,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316174859] [2023-08-03 20:48:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:22,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:22,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:22,064 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 20:48:22,083 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 20:48:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:22,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:48:22,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:22,151 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 20:48:22,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:22,173 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 20:48:22,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316174859] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:22,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:22,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:48:22,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310236625] [2023-08-03 20:48:22,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:22,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:22,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:22,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:22,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 240 [2023-08-03 20:48:22,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 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 20:48:22,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:22,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 240 [2023-08-03 20:48:22,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:22,831 INFO L124 PetriNetUnfolderBase]: 6552/8619 cut-off events. [2023-08-03 20:48:22,832 INFO L125 PetriNetUnfolderBase]: For 1300/1300 co-relation queries the response was YES. [2023-08-03 20:48:22,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18203 conditions, 8619 events. 6552/8619 cut-off events. For 1300/1300 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 38326 event pairs, 1930 based on Foata normal form. 3/5259 useless extension candidates. Maximal degree in co-relation 5227. Up to 8209 conditions per place. [2023-08-03 20:48:22,888 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 40 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-03 20:48:22,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 52 transitions, 264 flow [2023-08-03 20:48:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 450 transitions. [2023-08-03 20:48:22,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2023-08-03 20:48:22,891 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 450 transitions. [2023-08-03 20:48:22,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 450 transitions. [2023-08-03 20:48:22,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:22,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 450 transitions. [2023-08-03 20:48:22,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 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 20:48:22,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:22,894 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:22,894 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 170 flow. Second operand 4 states and 450 transitions. [2023-08-03 20:48:22,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 52 transitions, 264 flow [2023-08-03 20:48:22,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:22,900 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 166 flow [2023-08-03 20:48:22,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-03 20:48:22,901 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 20:48:22,901 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 166 flow [2023-08-03 20:48:22,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 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 20:48:22,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:22,901 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:48:22,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 20:48:23,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:23,107 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] === [2023-08-03 20:48:23,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:23,107 INFO L85 PathProgramCache]: Analyzing trace with hash -621103001, now seen corresponding path program 1 times [2023-08-03 20:48:23,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:23,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093653275] [2023-08-03 20:48:23,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:23,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:48:23,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093653275] [2023-08-03 20:48:23,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093653275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510892790] [2023-08-03 20:48:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:23,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:23,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:23,173 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 20:48:23,191 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 20:48:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:23,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:48:23,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:48:23,255 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:23,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510892790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:23,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:23,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:48:23,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076484106] [2023-08-03 20:48:23,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:23,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:23,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:23,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:48:23,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 240 [2023-08-03 20:48:23,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 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 20:48:23,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:23,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 240 [2023-08-03 20:48:23,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:23,809 INFO L124 PetriNetUnfolderBase]: 6120/8058 cut-off events. [2023-08-03 20:48:23,809 INFO L125 PetriNetUnfolderBase]: For 928/928 co-relation queries the response was YES. [2023-08-03 20:48:23,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16949 conditions, 8058 events. 6120/8058 cut-off events. For 928/928 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 35652 event pairs, 400 based on Foata normal form. 81/4992 useless extension candidates. Maximal degree in co-relation 7285. Up to 6966 conditions per place. [2023-08-03 20:48:23,854 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 52 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-03 20:48:23,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 316 flow [2023-08-03 20:48:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:48:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:48:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 565 transitions. [2023-08-03 20:48:23,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2023-08-03 20:48:23,856 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 565 transitions. [2023-08-03 20:48:23,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 565 transitions. [2023-08-03 20:48:23,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:23,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 565 transitions. [2023-08-03 20:48:23,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 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 20:48:23,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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 20:48:23,860 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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 20:48:23,860 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 166 flow. Second operand 5 states and 565 transitions. [2023-08-03 20:48:23,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 316 flow [2023-08-03 20:48:23,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 304 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:48:23,865 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 171 flow [2023-08-03 20:48:23,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-03 20:48:23,866 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 20:48:23,866 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 171 flow [2023-08-03 20:48:23,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 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 20:48:23,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:23,866 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] [2023-08-03 20:48:23,875 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 20:48:24,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:24,072 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:24,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:24,072 INFO L85 PathProgramCache]: Analyzing trace with hash 749503485, now seen corresponding path program 1 times [2023-08-03 20:48:24,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:24,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599695012] [2023-08-03 20:48:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:24,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 20:48:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599695012] [2023-08-03 20:48:24,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599695012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64596135] [2023-08-03 20:48:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:24,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:24,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:24,126 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 20:48:24,128 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 20:48:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:24,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:48:24,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:24,200 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 20:48:24,200 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:24,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64596135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:24,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:24,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:48:24,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43114822] [2023-08-03 20:48:24,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:24,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:48:24,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:48:24,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:24,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 240 [2023-08-03 20:48:24,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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 20:48:24,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:24,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 240 [2023-08-03 20:48:24,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:24,694 INFO L124 PetriNetUnfolderBase]: 5997/8008 cut-off events. [2023-08-03 20:48:24,694 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-08-03 20:48:24,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17005 conditions, 8008 events. 5997/8008 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 36447 event pairs, 2243 based on Foata normal form. 0/5017 useless extension candidates. Maximal degree in co-relation 7491. Up to 5805 conditions per place. [2023-08-03 20:48:24,731 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 20:48:24,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 309 flow [2023-08-03 20:48:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:48:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:48:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-03 20:48:24,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2023-08-03 20:48:24,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-03 20:48:24,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-03 20:48:24,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:24,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-03 20:48:24,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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 20:48:24,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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 20:48:24,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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 20:48:24,736 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 171 flow. Second operand 3 states and 357 transitions. [2023-08-03 20:48:24,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 309 flow [2023-08-03 20:48:24,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 302 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:48:24,740 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 176 flow [2023-08-03 20:48:24,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-03 20:48:24,740 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-03 20:48:24,740 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 176 flow [2023-08-03 20:48:24,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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 20:48:24,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:24,741 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, 1, 1, 1, 1] [2023-08-03 20:48:24,752 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 20:48:24,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:24,946 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:24,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash 615578559, now seen corresponding path program 1 times [2023-08-03 20:48:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:24,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275383280] [2023-08-03 20:48:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:24,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:24,995 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 20:48:24,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:24,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275383280] [2023-08-03 20:48:24,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275383280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:24,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254701413] [2023-08-03 20:48:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:24,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:24,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:24,997 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 20:48:24,999 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 20:48:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:25,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:48:25,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:25,075 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 20:48:25,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:25,088 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 20:48:25,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254701413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:25,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:25,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:48:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257027043] [2023-08-03 20:48:25,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:25,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:25,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:25,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:25,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 240 [2023-08-03 20:48:25,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 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 20:48:25,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:25,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 240 [2023-08-03 20:48:25,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:25,547 INFO L124 PetriNetUnfolderBase]: 5682/7585 cut-off events. [2023-08-03 20:48:25,547 INFO L125 PetriNetUnfolderBase]: For 1241/1241 co-relation queries the response was YES. [2023-08-03 20:48:25,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16360 conditions, 7585 events. 5682/7585 cut-off events. For 1241/1241 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 34685 event pairs, 1645 based on Foata normal form. 27/4832 useless extension candidates. Maximal degree in co-relation 10425. Up to 6552 conditions per place. [2023-08-03 20:48:25,579 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 49 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-03 20:48:25,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 304 flow [2023-08-03 20:48:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 458 transitions. [2023-08-03 20:48:25,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47708333333333336 [2023-08-03 20:48:25,582 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 458 transitions. [2023-08-03 20:48:25,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 458 transitions. [2023-08-03 20:48:25,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:25,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 458 transitions. [2023-08-03 20:48:25,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.5) internal successors, (458), 4 states have internal predecessors, (458), 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 20:48:25,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:25,585 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:25,585 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 176 flow. Second operand 4 states and 458 transitions. [2023-08-03 20:48:25,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 304 flow [2023-08-03 20:48:25,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:25,606 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 172 flow [2023-08-03 20:48:25,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-03 20:48:25,607 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-03 20:48:25,607 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 172 flow [2023-08-03 20:48:25,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.8) internal successors, (534), 5 states have internal predecessors, (534), 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 20:48:25,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:25,608 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] [2023-08-03 20:48:25,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 20:48:25,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:25,813 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:25,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:25,814 INFO L85 PathProgramCache]: Analyzing trace with hash -64201108, now seen corresponding path program 1 times [2023-08-03 20:48:25,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:25,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22719354] [2023-08-03 20:48:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:25,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:48:25,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:25,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22719354] [2023-08-03 20:48:25,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22719354] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:25,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342989958] [2023-08-03 20:48:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:25,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:25,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:25,867 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 20:48:25,870 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 20:48:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:25,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:48:25,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:48:25,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:48:25,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342989958] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:25,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:25,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:48:25,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844844626] [2023-08-03 20:48:25,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:25,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:25,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:25,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:25,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:25,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 240 [2023-08-03 20:48:25,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 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 20:48:25,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:25,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 240 [2023-08-03 20:48:25,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:26,312 INFO L124 PetriNetUnfolderBase]: 4136/5529 cut-off events. [2023-08-03 20:48:26,312 INFO L125 PetriNetUnfolderBase]: For 1255/1255 co-relation queries the response was YES. [2023-08-03 20:48:26,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11920 conditions, 5529 events. 4136/5529 cut-off events. For 1255/1255 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22797 event pairs, 747 based on Foata normal form. 108/3585 useless extension candidates. Maximal degree in co-relation 10506. Up to 2080 conditions per place. [2023-08-03 20:48:26,342 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-03 20:48:26,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 342 flow [2023-08-03 20:48:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 465 transitions. [2023-08-03 20:48:26,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2023-08-03 20:48:26,345 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 465 transitions. [2023-08-03 20:48:26,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 465 transitions. [2023-08-03 20:48:26,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:26,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 465 transitions. [2023-08-03 20:48:26,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 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 20:48:26,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:26,348 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:26,348 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 172 flow. Second operand 4 states and 465 transitions. [2023-08-03 20:48:26,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 342 flow [2023-08-03 20:48:26,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 336 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:48:26,356 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 186 flow [2023-08-03 20:48:26,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-03 20:48:26,357 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2023-08-03 20:48:26,357 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 186 flow [2023-08-03 20:48:26,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 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 20:48:26,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:26,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-08-03 20:48:26,364 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 20:48:26,563 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,SelfDestructingSolverStorable10 [2023-08-03 20:48:26,563 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:26,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:26,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1616062781, now seen corresponding path program 1 times [2023-08-03 20:48:26,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:26,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130070271] [2023-08-03 20:48:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:26,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:26,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:26,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130070271] [2023-08-03 20:48:26,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130070271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:26,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523045594] [2023-08-03 20:48:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:26,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:26,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:26,637 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 20:48:26,639 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 20:48:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:26,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:48:26,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:26,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:26,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523045594] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:26,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:26,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:48:26,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76764531] [2023-08-03 20:48:26,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:26,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:26,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:26,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:26,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:26,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 240 [2023-08-03 20:48:26,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 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 20:48:26,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:26,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 240 [2023-08-03 20:48:26,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:27,120 INFO L124 PetriNetUnfolderBase]: 4120/5502 cut-off events. [2023-08-03 20:48:27,120 INFO L125 PetriNetUnfolderBase]: For 2154/2154 co-relation queries the response was YES. [2023-08-03 20:48:27,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 5502 events. 4120/5502 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22638 event pairs, 1861 based on Foata normal form. 13/3471 useless extension candidates. Maximal degree in co-relation 11152. Up to 4661 conditions per place. [2023-08-03 20:48:27,149 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 55 selfloop transitions, 3 changer transitions 2/68 dead transitions. [2023-08-03 20:48:27,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 358 flow [2023-08-03 20:48:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 465 transitions. [2023-08-03 20:48:27,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2023-08-03 20:48:27,151 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 465 transitions. [2023-08-03 20:48:27,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 465 transitions. [2023-08-03 20:48:27,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:27,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 465 transitions. [2023-08-03 20:48:27,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 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 20:48:27,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:27,154 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:27,154 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 186 flow. Second operand 4 states and 465 transitions. [2023-08-03 20:48:27,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 358 flow [2023-08-03 20:48:27,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:27,167 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 190 flow [2023-08-03 20:48:27,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-08-03 20:48:27,167 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2023-08-03 20:48:27,167 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 190 flow [2023-08-03 20:48:27,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 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 20:48:27,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:27,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:48:27,175 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 20:48:27,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:27,373 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:27,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:27,373 INFO L85 PathProgramCache]: Analyzing trace with hash -988130943, now seen corresponding path program 1 times [2023-08-03 20:48:27,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:27,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984415157] [2023-08-03 20:48:27,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:27,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:48:27,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:27,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984415157] [2023-08-03 20:48:27,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984415157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:27,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:48:27,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:48:27,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326509394] [2023-08-03 20:48:27,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:27,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:48:27,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:27,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:48:27,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 20:48:27,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 240 [2023-08-03 20:48:27,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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 20:48:27,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:27,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 240 [2023-08-03 20:48:27,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:27,908 INFO L124 PetriNetUnfolderBase]: 4668/6185 cut-off events. [2023-08-03 20:48:27,908 INFO L125 PetriNetUnfolderBase]: For 2473/2473 co-relation queries the response was YES. [2023-08-03 20:48:27,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14186 conditions, 6185 events. 4668/6185 cut-off events. For 2473/2473 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 26120 event pairs, 1474 based on Foata normal form. 0/4094 useless extension candidates. Maximal degree in co-relation 13995. Up to 4670 conditions per place. [2023-08-03 20:48:27,927 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 59 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-03 20:48:27,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 419 flow [2023-08-03 20:48:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-08-03 20:48:27,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48854166666666665 [2023-08-03 20:48:27,929 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-08-03 20:48:27,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-08-03 20:48:27,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:27,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-08-03 20:48:27,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 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 20:48:27,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:27,932 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:27,932 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 190 flow. Second operand 4 states and 469 transitions. [2023-08-03 20:48:27,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 419 flow [2023-08-03 20:48:27,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 406 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 20:48:27,947 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 196 flow [2023-08-03 20:48:27,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2023-08-03 20:48:27,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2023-08-03 20:48:27,948 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 196 flow [2023-08-03 20:48:27,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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 20:48:27,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:27,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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 20:48:27,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 20:48:27,949 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:27,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:27,949 INFO L85 PathProgramCache]: Analyzing trace with hash -106699526, now seen corresponding path program 1 times [2023-08-03 20:48:27,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:27,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600545320] [2023-08-03 20:48:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:27,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:48:28,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:28,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600545320] [2023-08-03 20:48:28,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600545320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:28,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:48:28,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:48:28,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291113699] [2023-08-03 20:48:28,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:28,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:28,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:28,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:28,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:28,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 240 [2023-08-03 20:48:28,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 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 20:48:28,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:28,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 240 [2023-08-03 20:48:28,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:28,536 INFO L124 PetriNetUnfolderBase]: 5045/6732 cut-off events. [2023-08-03 20:48:28,536 INFO L125 PetriNetUnfolderBase]: For 3565/3565 co-relation queries the response was YES. [2023-08-03 20:48:28,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16877 conditions, 6732 events. 5045/6732 cut-off events. For 3565/3565 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 29129 event pairs, 2009 based on Foata normal form. 112/4737 useless extension candidates. Maximal degree in co-relation 16675. Up to 4672 conditions per place. [2023-08-03 20:48:28,564 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 74 selfloop transitions, 5 changer transitions 19/104 dead transitions. [2023-08-03 20:48:28,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 104 transitions, 639 flow [2023-08-03 20:48:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:48:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:48:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2023-08-03 20:48:28,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925 [2023-08-03 20:48:28,566 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2023-08-03 20:48:28,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2023-08-03 20:48:28,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:28,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2023-08-03 20:48:28,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 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 20:48:28,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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 20:48:28,569 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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 20:48:28,569 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 196 flow. Second operand 5 states and 591 transitions. [2023-08-03 20:48:28,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 104 transitions, 639 flow [2023-08-03 20:48:28,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 104 transitions, 630 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:48:28,584 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 219 flow [2023-08-03 20:48:28,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-08-03 20:48:28,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2023-08-03 20:48:28,585 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 219 flow [2023-08-03 20:48:28,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 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 20:48:28,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:28,585 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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 20:48:28,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 20:48:28,586 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:28,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:28,586 INFO L85 PathProgramCache]: Analyzing trace with hash -456369090, now seen corresponding path program 2 times [2023-08-03 20:48:28,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:28,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634633381] [2023-08-03 20:48:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:28,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:28,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:28,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634633381] [2023-08-03 20:48:28,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634633381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:28,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433803018] [2023-08-03 20:48:28,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:48:28,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:28,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:28,679 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:48:28,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 20:48:28,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:48:28,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:48:28,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:48:28,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:28,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:48:28,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433803018] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:28,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:28,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 8 [2023-08-03 20:48:28,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350876293] [2023-08-03 20:48:28,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:28,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:48:28,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:28,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:48:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:48:28,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 240 [2023-08-03 20:48:28,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 219 flow. Second operand has 8 states, 8 states have (on average 104.125) internal successors, (833), 8 states have internal predecessors, (833), 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 20:48:28,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:28,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 240 [2023-08-03 20:48:28,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:29,678 INFO L124 PetriNetUnfolderBase]: 7179/9401 cut-off events. [2023-08-03 20:48:29,679 INFO L125 PetriNetUnfolderBase]: For 7442/7442 co-relation queries the response was YES. [2023-08-03 20:48:29,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26247 conditions, 9401 events. 7179/9401 cut-off events. For 7442/7442 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 41140 event pairs, 202 based on Foata normal form. 0/6829 useless extension candidates. Maximal degree in co-relation 26016. Up to 3434 conditions per place. [2023-08-03 20:48:29,720 INFO L140 encePairwiseOnDemand]: 231/240 looper letters, 180 selfloop transitions, 29 changer transitions 12/227 dead transitions. [2023-08-03 20:48:29,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 227 transitions, 1479 flow [2023-08-03 20:48:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 20:48:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 20:48:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1378 transitions. [2023-08-03 20:48:29,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47847222222222224 [2023-08-03 20:48:29,724 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1378 transitions. [2023-08-03 20:48:29,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1378 transitions. [2023-08-03 20:48:29,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:29,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1378 transitions. [2023-08-03 20:48:29,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 114.83333333333333) internal successors, (1378), 12 states have internal predecessors, (1378), 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 20:48:29,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 240.0) internal successors, (3120), 13 states have internal predecessors, (3120), 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 20:48:29,732 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 240.0) internal successors, (3120), 13 states have internal predecessors, (3120), 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 20:48:29,732 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 219 flow. Second operand 12 states and 1378 transitions. [2023-08-03 20:48:29,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 227 transitions, 1479 flow [2023-08-03 20:48:29,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 227 transitions, 1455 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:48:29,749 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 455 flow [2023-08-03 20:48:29,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=455, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-08-03 20:48:29,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2023-08-03 20:48:29,750 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 455 flow [2023-08-03 20:48:29,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.125) internal successors, (833), 8 states have internal predecessors, (833), 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 20:48:29,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:29,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:48:29,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 20:48:29,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 20:48:29,955 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:29,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:29,956 INFO L85 PathProgramCache]: Analyzing trace with hash 674524480, now seen corresponding path program 1 times [2023-08-03 20:48:29,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:29,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319566750] [2023-08-03 20:48:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:29,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:48:30,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:30,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319566750] [2023-08-03 20:48:30,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319566750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:30,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:48:30,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:48:30,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599040140] [2023-08-03 20:48:30,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:30,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:30,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:30,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:30,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:30,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 240 [2023-08-03 20:48:30,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 455 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 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 20:48:30,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:30,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 240 [2023-08-03 20:48:30,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:31,252 INFO L124 PetriNetUnfolderBase]: 10539/14394 cut-off events. [2023-08-03 20:48:31,253 INFO L125 PetriNetUnfolderBase]: For 67825/73620 co-relation queries the response was YES. [2023-08-03 20:48:31,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61254 conditions, 14394 events. 10539/14394 cut-off events. For 67825/73620 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 72457 event pairs, 2575 based on Foata normal form. 3365/17618 useless extension candidates. Maximal degree in co-relation 60720. Up to 7718 conditions per place. [2023-08-03 20:48:31,442 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 143 selfloop transitions, 7 changer transitions 22/187 dead transitions. [2023-08-03 20:48:31,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 187 transitions, 1497 flow [2023-08-03 20:48:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:48:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:48:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 602 transitions. [2023-08-03 20:48:31,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016666666666667 [2023-08-03 20:48:31,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 602 transitions. [2023-08-03 20:48:31,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 602 transitions. [2023-08-03 20:48:31,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:31,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 602 transitions. [2023-08-03 20:48:31,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 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 20:48:31,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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 20:48:31,448 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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 20:48:31,448 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 455 flow. Second operand 5 states and 602 transitions. [2023-08-03 20:48:31,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 187 transitions, 1497 flow [2023-08-03 20:48:31,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 187 transitions, 1448 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-08-03 20:48:31,553 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 482 flow [2023-08-03 20:48:31,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=482, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2023-08-03 20:48:31,553 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2023-08-03 20:48:31,553 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 482 flow [2023-08-03 20:48:31,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 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 20:48:31,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:31,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:48:31,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-03 20:48:31,554 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:31,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:31,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1178128936, now seen corresponding path program 2 times [2023-08-03 20:48:31,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:31,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016878977] [2023-08-03 20:48:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:31,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:48:31,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:31,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016878977] [2023-08-03 20:48:31,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016878977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:31,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870437759] [2023-08-03 20:48:31,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:48:31,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:31,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:31,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:48:31,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 20:48:31,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:48:31,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:48:31,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-03 20:48:31,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-03 20:48:31,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:31,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870437759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:31,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:31,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-08-03 20:48:31,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158463018] [2023-08-03 20:48:31,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:31,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:48:31,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:31,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:48:31,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:48:31,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 240 [2023-08-03 20:48:31,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 482 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:48:31,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:31,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 240 [2023-08-03 20:48:31,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:32,724 INFO L124 PetriNetUnfolderBase]: 7637/10309 cut-off events. [2023-08-03 20:48:32,724 INFO L125 PetriNetUnfolderBase]: For 50092/53360 co-relation queries the response was YES. [2023-08-03 20:48:32,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45938 conditions, 10309 events. 7637/10309 cut-off events. For 50092/53360 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 48583 event pairs, 2246 based on Foata normal form. 2582/12807 useless extension candidates. Maximal degree in co-relation 45896. Up to 7905 conditions per place. [2023-08-03 20:48:32,785 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 94 selfloop transitions, 7 changer transitions 0/117 dead transitions. [2023-08-03 20:48:32,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 943 flow [2023-08-03 20:48:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2023-08-03 20:48:32,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-08-03 20:48:32,787 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2023-08-03 20:48:32,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2023-08-03 20:48:32,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:32,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2023-08-03 20:48:32,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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 20:48:32,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:32,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:32,791 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 482 flow. Second operand 4 states and 468 transitions. [2023-08-03 20:48:32,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 943 flow [2023-08-03 20:48:32,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 117 transitions, 909 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-03 20:48:32,858 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 464 flow [2023-08-03 20:48:32,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=464, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2023-08-03 20:48:32,859 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2023-08-03 20:48:32,859 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 464 flow [2023-08-03 20:48:32,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:48:32,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:32,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:48:32,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 20:48:33,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 20:48:33,064 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:33,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:33,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1290239427, now seen corresponding path program 1 times [2023-08-03 20:48:33,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:33,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934571848] [2023-08-03 20:48:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:33,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:48:33,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:33,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934571848] [2023-08-03 20:48:33,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934571848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:33,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:48:33,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 20:48:33,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500211310] [2023-08-03 20:48:33,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:33,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:48:33,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:48:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:48:33,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 240 [2023-08-03 20:48:33,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 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 20:48:33,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:33,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 240 [2023-08-03 20:48:33,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:34,538 INFO L124 PetriNetUnfolderBase]: 10860/14848 cut-off events. [2023-08-03 20:48:34,538 INFO L125 PetriNetUnfolderBase]: For 75334/80564 co-relation queries the response was YES. [2023-08-03 20:48:34,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65056 conditions, 14848 events. 10860/14848 cut-off events. For 75334/80564 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 74851 event pairs, 3020 based on Foata normal form. 3519/18253 useless extension candidates. Maximal degree in co-relation 64508. Up to 9001 conditions per place. [2023-08-03 20:48:34,612 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 147 selfloop transitions, 7 changer transitions 20/189 dead transitions. [2023-08-03 20:48:34,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 189 transitions, 1517 flow [2023-08-03 20:48:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:48:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:48:34,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 602 transitions. [2023-08-03 20:48:34,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016666666666667 [2023-08-03 20:48:34,613 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 602 transitions. [2023-08-03 20:48:34,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 602 transitions. [2023-08-03 20:48:34,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:34,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 602 transitions. [2023-08-03 20:48:34,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 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 20:48:34,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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 20:48:34,617 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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 20:48:34,617 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 464 flow. Second operand 5 states and 602 transitions. [2023-08-03 20:48:34,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 189 transitions, 1517 flow [2023-08-03 20:48:34,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 189 transitions, 1483 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:48:34,732 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 498 flow [2023-08-03 20:48:34,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2023-08-03 20:48:34,733 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2023-08-03 20:48:34,733 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 498 flow [2023-08-03 20:48:34,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 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 20:48:34,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:34,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:48:34,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-03 20:48:34,733 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:34,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:34,733 INFO L85 PathProgramCache]: Analyzing trace with hash -915325495, now seen corresponding path program 2 times [2023-08-03 20:48:34,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:34,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696621595] [2023-08-03 20:48:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:34,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:48:34,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:34,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696621595] [2023-08-03 20:48:34,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696621595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:34,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794875151] [2023-08-03 20:48:34,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:48:34,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:34,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:34,795 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:48:34,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 20:48:34,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:48:34,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:48:34,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-03 20:48:34,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-03 20:48:34,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:48:34,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794875151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:48:34,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:48:34,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-08-03 20:48:34,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452671148] [2023-08-03 20:48:34,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:48:34,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:48:34,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:34,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:48:34,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:48:34,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 240 [2023-08-03 20:48:34,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:48:34,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:34,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 240 [2023-08-03 20:48:34,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:35,911 INFO L124 PetriNetUnfolderBase]: 6968/9542 cut-off events. [2023-08-03 20:48:35,911 INFO L125 PetriNetUnfolderBase]: For 51579/55475 co-relation queries the response was YES. [2023-08-03 20:48:35,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44562 conditions, 9542 events. 6968/9542 cut-off events. For 51579/55475 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 45216 event pairs, 2292 based on Foata normal form. 3285/12765 useless extension candidates. Maximal degree in co-relation 44236. Up to 7366 conditions per place. [2023-08-03 20:48:35,967 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 98 selfloop transitions, 7 changer transitions 0/121 dead transitions. [2023-08-03 20:48:35,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 121 transitions, 982 flow [2023-08-03 20:48:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:48:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:48:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-03 20:48:35,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2023-08-03 20:48:35,969 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-03 20:48:35,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-03 20:48:35,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:35,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-03 20:48:35,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 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 20:48:35,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:35,973 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 20:48:35,973 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 498 flow. Second operand 4 states and 470 transitions. [2023-08-03 20:48:35,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 121 transitions, 982 flow [2023-08-03 20:48:36,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 121 transitions, 948 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-03 20:48:36,027 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 480 flow [2023-08-03 20:48:36,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=480, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2023-08-03 20:48:36,027 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2023-08-03 20:48:36,027 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 480 flow [2023-08-03 20:48:36,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:48:36,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:36,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:48:36,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-03 20:48:36,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:36,228 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:36,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1553232358, now seen corresponding path program 1 times [2023-08-03 20:48:36,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:36,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070370514] [2023-08-03 20:48:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:36,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:48:36,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070370514] [2023-08-03 20:48:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070370514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756730570] [2023-08-03 20:48:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:36,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:36,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:36,687 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:48:36,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-03 20:48:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:36,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-03 20:48:36,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:48:37,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:48:37,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756730570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:37,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:37,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2023-08-03 20:48:37,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736441316] [2023-08-03 20:48:37,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:37,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-03 20:48:37,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:37,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-03 20:48:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-08-03 20:48:38,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 240 [2023-08-03 20:48:38,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 480 flow. Second operand has 25 states, 25 states have (on average 95.12) internal successors, (2378), 25 states have internal predecessors, (2378), 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 20:48:38,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:38,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 240 [2023-08-03 20:48:38,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:48:48,319 INFO L124 PetriNetUnfolderBase]: 36185/52025 cut-off events. [2023-08-03 20:48:48,319 INFO L125 PetriNetUnfolderBase]: For 249903/254015 co-relation queries the response was YES. [2023-08-03 20:48:48,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242787 conditions, 52025 events. 36185/52025 cut-off events. For 249903/254015 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 336209 event pairs, 2526 based on Foata normal form. 4413/56436 useless extension candidates. Maximal degree in co-relation 242193. Up to 14724 conditions per place. [2023-08-03 20:48:48,695 INFO L140 encePairwiseOnDemand]: 227/240 looper letters, 1151 selfloop transitions, 411 changer transitions 59/1626 dead transitions. [2023-08-03 20:48:48,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 1626 transitions, 13534 flow [2023-08-03 20:48:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-03 20:48:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-03 20:48:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 7915 transitions. [2023-08-03 20:48:48,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45804398148148145 [2023-08-03 20:48:48,715 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 7915 transitions. [2023-08-03 20:48:48,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 7915 transitions. [2023-08-03 20:48:48,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:48:48,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 7915 transitions. [2023-08-03 20:48:48,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 109.93055555555556) internal successors, (7915), 72 states have internal predecessors, (7915), 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 20:48:48,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 240.0) internal successors, (17520), 73 states have internal predecessors, (17520), 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 20:48:48,762 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 240.0) internal successors, (17520), 73 states have internal predecessors, (17520), 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 20:48:48,763 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 480 flow. Second operand 72 states and 7915 transitions. [2023-08-03 20:48:48,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 1626 transitions, 13534 flow [2023-08-03 20:48:49,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 1626 transitions, 13494 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:48:49,525 INFO L231 Difference]: Finished difference. Result has 200 places, 541 transitions, 5633 flow [2023-08-03 20:48:49,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=5633, PETRI_PLACES=200, PETRI_TRANSITIONS=541} [2023-08-03 20:48:49,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2023-08-03 20:48:49,526 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 541 transitions, 5633 flow [2023-08-03 20:48:49,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 95.12) internal successors, (2378), 25 states have internal predecessors, (2378), 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 20:48:49,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:48:49,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:48:49,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-03 20:48:49,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-03 20:48:49,733 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:48:49,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:48:49,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1109572180, now seen corresponding path program 2 times [2023-08-03 20:48:49,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:48:49,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562746851] [2023-08-03 20:48:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:48:49,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:48:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:48:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 20:48:50,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:48:50,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562746851] [2023-08-03 20:48:50,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562746851] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:48:50,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956005876] [2023-08-03 20:48:50,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:48:50,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:48:50,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:48:50,121 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:48:50,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-03 20:48:50,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:48:50,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:48:50,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-03 20:48:50,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:48:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 20:48:50,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:48:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 20:48:52,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956005876] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:48:52,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:48:52,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 28 [2023-08-03 20:48:52,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227453700] [2023-08-03 20:48:52,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:48:52,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-03 20:48:52,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:48:52,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-03 20:48:52,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-08-03 20:48:53,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 240 [2023-08-03 20:48:53,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 541 transitions, 5633 flow. Second operand has 30 states, 30 states have (on average 95.43333333333334) internal successors, (2863), 30 states have internal predecessors, (2863), 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 20:48:53,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:48:53,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 240 [2023-08-03 20:48:53,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:49:28,965 INFO L124 PetriNetUnfolderBase]: 98623/144818 cut-off events. [2023-08-03 20:49:28,965 INFO L125 PetriNetUnfolderBase]: For 3875607/3884150 co-relation queries the response was YES. [2023-08-03 20:49:30,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998410 conditions, 144818 events. 98623/144818 cut-off events. For 3875607/3884150 co-relation queries the response was YES. Maximal size of possible extension queue 3692. Compared 1110101 event pairs, 13868 based on Foata normal form. 8934/153714 useless extension candidates. Maximal degree in co-relation 996226. Up to 55981 conditions per place. [2023-08-03 20:49:31,205 INFO L140 encePairwiseOnDemand]: 227/240 looper letters, 1776 selfloop transitions, 1184 changer transitions 59/3024 dead transitions. [2023-08-03 20:49:31,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 3024 transitions, 36529 flow [2023-08-03 20:49:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-08-03 20:49:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-08-03 20:49:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 9915 transitions. [2023-08-03 20:49:31,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539835164835165 [2023-08-03 20:49:31,217 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 9915 transitions. [2023-08-03 20:49:31,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 9915 transitions. [2023-08-03 20:49:31,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:49:31,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 9915 transitions. [2023-08-03 20:49:31,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 108.95604395604396) internal successors, (9915), 91 states have internal predecessors, (9915), 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 20:49:31,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 240.0) internal successors, (22080), 92 states have internal predecessors, (22080), 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 20:49:31,264 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 240.0) internal successors, (22080), 92 states have internal predecessors, (22080), 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 20:49:31,264 INFO L175 Difference]: Start difference. First operand has 200 places, 541 transitions, 5633 flow. Second operand 91 states and 9915 transitions. [2023-08-03 20:49:31,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 3024 transitions, 36529 flow [2023-08-03 20:50:32,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 3024 transitions, 32421 flow, removed 2050 selfloop flow, removed 1 redundant places. [2023-08-03 20:50:32,576 INFO L231 Difference]: Finished difference. Result has 344 places, 1636 transitions, 21658 flow [2023-08-03 20:50:32,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=21658, PETRI_PLACES=344, PETRI_TRANSITIONS=1636} [2023-08-03 20:50:32,577 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2023-08-03 20:50:32,577 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1636 transitions, 21658 flow [2023-08-03 20:50:32,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 95.43333333333334) internal successors, (2863), 30 states have internal predecessors, (2863), 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 20:50:32,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:50:32,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:50:32,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-03 20:50:32,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:50:32,778 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:50:32,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:50:32,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1511511724, now seen corresponding path program 3 times [2023-08-03 20:50:32,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:50:32,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494151154] [2023-08-03 20:50:32,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:50:32,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:50:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:50:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:50:33,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:50:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494151154] [2023-08-03 20:50:33,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494151154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:50:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941588165] [2023-08-03 20:50:33,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 20:50:33,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:50:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:50:33,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:50:33,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-03 20:50:33,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-03 20:50:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:50:33,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-03 20:50:33,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:50:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:50:33,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:50:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:50:35,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941588165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:50:35,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:50:35,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2023-08-03 20:50:35,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900405620] [2023-08-03 20:50:35,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:50:35,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-03 20:50:35,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:50:35,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-03 20:50:35,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-08-03 20:50:35,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 240 [2023-08-03 20:50:35,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1636 transitions, 21658 flow. Second operand has 29 states, 29 states have (on average 95.37931034482759) internal successors, (2766), 29 states have internal predecessors, (2766), 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 20:50:35,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:50:35,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 240 [2023-08-03 20:50:35,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:05,087 INFO L124 PetriNetUnfolderBase]: 228760/343794 cut-off events. [2023-08-03 20:53:05,088 INFO L125 PetriNetUnfolderBase]: For 17893070/17905028 co-relation queries the response was YES. [2023-08-03 20:53:16,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783253 conditions, 343794 events. 228760/343794 cut-off events. For 17893070/17905028 co-relation queries the response was YES. Maximal size of possible extension queue 9550. Compared 3060274 event pairs, 33506 based on Foata normal form. 12295/355975 useless extension candidates. Maximal degree in co-relation 2782443. Up to 118885 conditions per place. [2023-08-03 20:53:18,430 INFO L140 encePairwiseOnDemand]: 228/240 looper letters, 2194 selfloop transitions, 2153 changer transitions 45/4397 dead transitions. [2023-08-03 20:53:18,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 4397 transitions, 68657 flow [2023-08-03 20:53:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-03 20:53:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-03 20:53:18,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4964 transitions. [2023-08-03 20:53:18,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700757575757576 [2023-08-03 20:53:18,445 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4964 transitions. [2023-08-03 20:53:18,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4964 transitions. [2023-08-03 20:53:18,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:18,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4964 transitions. [2023-08-03 20:53:18,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 112.81818181818181) internal successors, (4964), 44 states have internal predecessors, (4964), 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 20:53:18,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 240.0) internal successors, (10800), 45 states have internal predecessors, (10800), 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 20:53:18,491 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 240.0) internal successors, (10800), 45 states have internal predecessors, (10800), 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 20:53:18,493 INFO L175 Difference]: Start difference. First operand has 344 places, 1636 transitions, 21658 flow. Second operand 44 states and 4964 transitions. [2023-08-03 20:53:18,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 4397 transitions, 68657 flow Received shutdown request... [2023-08-03 20:58:22,669 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 20:58:22,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-03 20:58:22,711 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 20:58:22,711 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 20:58:22,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:58:22,869 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-03 20:58:22,870 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 20:58:22,870 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 20:58:22,870 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:58:22,871 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 20:58:22,871 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 20:58:22,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 08:58:22 BasicIcfg [2023-08-03 20:58:22,874 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 20:58:22,875 INFO L158 Benchmark]: Toolchain (without parser) took 611342.48ms. Allocated memory was 327.2MB in the beginning and 15.9GB in the end (delta: 15.5GB). Free memory was 280.5MB in the beginning and 6.0GB in the end (delta: -5.8GB). Peak memory consumption was 10.2GB. Max. memory is 16.0GB. [2023-08-03 20:58:22,875 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 327.2MB. Free memory is still 280.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 20:58:22,875 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.68ms. Allocated memory is still 327.2MB. Free memory was 280.2MB in the beginning and 269.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-03 20:58:22,876 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.18ms. Allocated memory is still 327.2MB. Free memory was 269.1MB in the beginning and 267.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 20:58:22,876 INFO L158 Benchmark]: Boogie Preprocessor took 27.46ms. Allocated memory is still 327.2MB. Free memory was 267.4MB in the beginning and 265.9MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-03 20:58:22,876 INFO L158 Benchmark]: RCFGBuilder took 416.85ms. Allocated memory is still 327.2MB. Free memory was 265.9MB in the beginning and 250.2MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-03 20:58:22,876 INFO L158 Benchmark]: TraceAbstraction took 610661.63ms. Allocated memory was 327.2MB in the beginning and 15.9GB in the end (delta: 15.5GB). Free memory was 249.5MB in the beginning and 6.0GB in the end (delta: -5.8GB). Peak memory consumption was 10.2GB. Max. memory is 16.0GB. [2023-08-03 20:58:22,884 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 327.2MB. Free memory is still 280.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 201.68ms. Allocated memory is still 327.2MB. Free memory was 280.2MB in the beginning and 269.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.18ms. Allocated memory is still 327.2MB. Free memory was 269.1MB in the beginning and 267.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 27.46ms. Allocated memory is still 327.2MB. Free memory was 267.4MB in the beginning and 265.9MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * RCFGBuilder took 416.85ms. Allocated memory is still 327.2MB. Free memory was 265.9MB in the beginning and 250.2MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 610661.63ms. Allocated memory was 327.2MB in the beginning and 15.9GB in the end (delta: 15.5GB). Free memory was 249.5MB in the beginning and 6.0GB in the end (delta: -5.8GB). Peak memory consumption was 10.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 102 PlacesBefore, 29 PlacesAfterwards, 111 TransitionsBefore, 30 TransitionsAfterwards, 2052 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 13 ConcurrentYvCompositions, 8 ChoiceCompositions, 95 TotalNumberOfCompositions, 2558 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2540, independent: 2535, independent conditional: 0, independent unconditional: 2535, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1074, independent: 1071, independent conditional: 0, independent unconditional: 1071, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2540, independent: 1464, independent conditional: 0, independent unconditional: 1464, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 1074, unknown conditional: 0, unknown unconditional: 1074] , Statistics on independence cache: Total cache size (in pairs): 62, Positive cache size: 62, Positive conditional cache size: 0, Positive unconditional cache size: 62, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 121 PlacesBefore, 41 PlacesAfterwards, 134 TransitionsBefore, 44 TransitionsAfterwards, 5028 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 17 ConcurrentYvCompositions, 10 ChoiceCompositions, 106 TotalNumberOfCompositions, 7687 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7439, independent: 7431, independent conditional: 0, independent unconditional: 7431, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2649, independent: 2644, independent conditional: 0, independent unconditional: 2644, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7439, independent: 4787, independent conditional: 0, independent unconditional: 4787, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 2649, unknown conditional: 0, unknown unconditional: 2649] , Statistics on independence cache: Total cache size (in pairs): 214, Positive cache size: 214, Positive conditional cache size: 0, Positive unconditional cache size: 214, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 113 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.0s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 52 IncrementalHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 52 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 128 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 607.5s, OverallIterations: 20, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 592.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4406 SdHoareTripleChecker+Valid, 13.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4170 mSDsluCounter, 1515 SdHoareTripleChecker+Invalid, 10.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1379 mSDsCounter, 560 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25579 IncrementalHoareTripleChecker+Invalid, 26139 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 560 mSolverCounterUnsat, 136 mSDtfsCounter, 25579 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1054 GetRequests, 731 SyntacticMatches, 16 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6451 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21658occurred in iteration=19, InterpolantAutomatonStates: 240, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 1156 NumberOfCodeBlocks, 1156 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 1423 ConstructedInterpolants, 0 QuantifiedInterpolants, 11598 SizeOfPredicates, 40 NumberOfNonLiveVariables, 2268 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 43 InterpolantComputations, 12 PerfectInterpolantSequences, 584/714 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown