/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe012_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:19:31,936 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:19:32,008 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:19:32,013 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:19:32,014 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:19:32,014 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:19:32,015 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:19:32,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:19:32,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:19:32,051 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:19:32,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:19:32,052 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:19:32,053 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:19:32,054 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:19:32,054 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:19:32,054 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:19:32,054 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:19:32,054 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:19:32,055 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:19:32,055 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:19:32,055 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:19:32,055 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:19:32,055 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:19:32,056 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:19:32,057 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:19:32,057 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:19:32,057 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:19:32,058 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:19:32,058 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:19:32,058 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:19:32,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:19:32,059 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:19:32,059 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:19:32,059 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:19:32,059 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:19:32,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:19:32,060 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:19:32,060 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:19:32,060 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:19:32,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:19:32,060 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:19:32,061 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:19:32,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:19:32,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:19:32,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:19:32,312 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:19:32,312 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:19:32,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe012_tso_bound2.i [2023-08-03 18:19:33,508 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:19:33,737 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:19:33,737 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe012_tso_bound2.i [2023-08-03 18:19:33,760 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72837b321/f5c0162c33c744bdb8c126f6d5c71bc7/FLAGd6844561b [2023-08-03 18:19:33,772 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72837b321/f5c0162c33c744bdb8c126f6d5c71bc7 [2023-08-03 18:19:33,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:19:33,778 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:19:33,781 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:19:33,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:19:33,784 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:19:33,785 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:19:33" (1/1) ... [2023-08-03 18:19:33,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2c4cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:33, skipping insertion in model container [2023-08-03 18:19:33,787 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:19:33" (1/1) ... [2023-08-03 18:19:33,832 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:19:33,980 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe012_tso_bound2.i[945,958] [2023-08-03 18:19:34,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:19:34,143 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:19:34,153 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe012_tso_bound2.i[945,958] [2023-08-03 18:19:34,173 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:19:34,174 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:19:34,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:19:34,232 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:19:34,232 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:19:34,238 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:19:34,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34 WrapperNode [2023-08-03 18:19:34,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:19:34,240 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:19:34,240 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:19:34,240 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:19:34,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (1/1) ... [2023-08-03 18:19:34,258 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (1/1) ... [2023-08-03 18:19:34,276 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-08-03 18:19:34,277 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:19:34,277 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:19:34,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:19:34,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:19:34,287 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (1/1) ... [2023-08-03 18:19:34,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (1/1) ... [2023-08-03 18:19:34,293 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (1/1) ... [2023-08-03 18:19:34,293 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (1/1) ... [2023-08-03 18:19:34,299 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (1/1) ... [2023-08-03 18:19:34,312 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (1/1) ... [2023-08-03 18:19:34,313 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (1/1) ... [2023-08-03 18:19:34,314 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (1/1) ... [2023-08-03 18:19:34,317 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:19:34,317 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:19:34,317 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:19:34,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:19:34,325 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (1/1) ... [2023-08-03 18:19:34,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:19:34,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:19:34,362 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 18:19:34,387 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 18:19:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:19:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 18:19:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:19:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:19:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:19:34,405 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 18:19:34,406 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 18:19:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 18:19:34,406 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 18:19:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 18:19:34,406 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 18:19:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:19:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 18:19:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:19:34,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:19:34,408 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 18:19:34,553 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:19:34,555 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:19:34,774 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:19:34,781 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:19:34,781 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 18:19:34,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:19:34 BoogieIcfgContainer [2023-08-03 18:19:34,783 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:19:34,785 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:19:34,785 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:19:34,787 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:19:34,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:19:33" (1/3) ... [2023-08-03 18:19:34,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ce2b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:19:34, skipping insertion in model container [2023-08-03 18:19:34,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:19:34" (2/3) ... [2023-08-03 18:19:34,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ce2b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:19:34, skipping insertion in model container [2023-08-03 18:19:34,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:19:34" (3/3) ... [2023-08-03 18:19:34,792 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe012_tso_bound2.i [2023-08-03 18:19:34,799 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:19:34,831 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:19:34,831 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 18:19:34,831 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:19:34,899 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:19:34,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 229 flow [2023-08-03 18:19:35,067 INFO L124 PetriNetUnfolderBase]: 30/415 cut-off events. [2023-08-03 18:19:35,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:19:35,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 415 events. 30/415 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1860 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 244. Up to 16 conditions per place. [2023-08-03 18:19:35,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 107 transitions, 229 flow [2023-08-03 18:19:35,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 95 transitions, 205 flow [2023-08-03 18:19:35,085 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:19:35,094 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 95 transitions, 205 flow [2023-08-03 18:19:35,096 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 95 transitions, 205 flow [2023-08-03 18:19:35,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 95 transitions, 205 flow [2023-08-03 18:19:35,138 INFO L124 PetriNetUnfolderBase]: 22/319 cut-off events. [2023-08-03 18:19:35,138 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:19:35,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 319 events. 22/319 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1300 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 196. Up to 16 conditions per place. [2023-08-03 18:19:35,143 INFO L119 LiptonReduction]: Number of co-enabled transitions 1692 [2023-08-03 18:19:37,081 INFO L134 LiptonReduction]: Checked pairs total: 3242 [2023-08-03 18:19:37,082 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-03 18:19:37,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:19:37,098 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;@5f79e0c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:19:37,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:19:37,102 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:19:37,103 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-03 18:19:37,103 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:19:37,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:19:37,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 18:19:37,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:19:37,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:19:37,110 INFO L85 PathProgramCache]: Analyzing trace with hash 11591648, now seen corresponding path program 1 times [2023-08-03 18:19:37,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:19:37,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642995895] [2023-08-03 18:19:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:37,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:19:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:37,325 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 18:19:37,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:19:37,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642995895] [2023-08-03 18:19:37,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642995895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:19:37,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:19:37,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:19:37,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614331273] [2023-08-03 18:19:37,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:19:37,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:19:37,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:19:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:19:37,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:19:37,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 184 [2023-08-03 18:19:37,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 18:19:37,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:19:37,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 184 [2023-08-03 18:19:37,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:19:37,521 INFO L124 PetriNetUnfolderBase]: 400/759 cut-off events. [2023-08-03 18:19:37,521 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 18:19:37,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1491 conditions, 759 events. 400/759 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4010 event pairs, 310 based on Foata normal form. 0/693 useless extension candidates. Maximal degree in co-relation 1474. Up to 668 conditions per place. [2023-08-03 18:19:37,531 INFO L140 encePairwiseOnDemand]: 180/184 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-03 18:19:37,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 119 flow [2023-08-03 18:19:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:19:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:19:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-03 18:19:37,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561594202898551 [2023-08-03 18:19:37,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-03 18:19:37,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-03 18:19:37,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:19:37,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-03 18:19:37,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 18:19:37,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 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 18:19:37,563 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 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 18:19:37,564 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 69 flow. Second operand 3 states and 307 transitions. [2023-08-03 18:19:37,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 119 flow [2023-08-03 18:19:37,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 18:19:37,568 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 75 flow [2023-08-03 18:19:37,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-03 18:19:37,572 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-03 18:19:37,572 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 75 flow [2023-08-03 18:19:37,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 18:19:37,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:19:37,573 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:19:37,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:19:37,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:19:37,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:19:37,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1751845798, now seen corresponding path program 1 times [2023-08-03 18:19:37,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:19:37,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632406826] [2023-08-03 18:19:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:37,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:19:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:19:37,593 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:19:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:19:37,619 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:19:37,620 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:19:37,621 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 18:19:37,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 18:19:37,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 18:19:37,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 18:19:37,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:19:37,623 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 18:19:37,625 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:19:37,625 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:19:37,644 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:19:37,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 128 transitions, 292 flow [2023-08-03 18:19:37,775 INFO L124 PetriNetUnfolderBase]: 93/1305 cut-off events. [2023-08-03 18:19:37,776 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:19:37,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 1305 events. 93/1305 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 8899 event pairs, 0 based on Foata normal form. 0/1146 useless extension candidates. Maximal degree in co-relation 946. Up to 54 conditions per place. [2023-08-03 18:19:37,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 128 transitions, 292 flow [2023-08-03 18:19:37,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 116 transitions, 268 flow [2023-08-03 18:19:37,784 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:19:37,784 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 116 transitions, 268 flow [2023-08-03 18:19:37,784 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 116 transitions, 268 flow [2023-08-03 18:19:37,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 116 transitions, 268 flow [2023-08-03 18:19:37,877 INFO L124 PetriNetUnfolderBase]: 66/981 cut-off events. [2023-08-03 18:19:37,878 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:19:37,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 981 events. 66/981 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6137 event pairs, 0 based on Foata normal form. 0/876 useless extension candidates. Maximal degree in co-relation 730. Up to 54 conditions per place. [2023-08-03 18:19:37,894 INFO L119 LiptonReduction]: Number of co-enabled transitions 4140 [2023-08-03 18:19:39,677 INFO L134 LiptonReduction]: Checked pairs total: 8765 [2023-08-03 18:19:39,677 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-03 18:19:39,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:19:39,680 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;@5f79e0c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:19:39,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:19:39,682 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:19:39,682 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-03 18:19:39,682 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:19:39,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:19:39,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 18:19:39,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:19:39,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:19:39,683 INFO L85 PathProgramCache]: Analyzing trace with hash 18735520, now seen corresponding path program 1 times [2023-08-03 18:19:39,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:19:39,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413524482] [2023-08-03 18:19:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:39,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:19:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:39,747 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 18:19:39,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:19:39,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413524482] [2023-08-03 18:19:39,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413524482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:19:39,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:19:39,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:19:39,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97729867] [2023-08-03 18:19:39,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:19:39,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:19:39,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:19:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:19:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:19:39,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 211 [2023-08-03 18:19:39,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 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 18:19:39,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:19:39,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 211 [2023-08-03 18:19:39,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:19:43,646 INFO L124 PetriNetUnfolderBase]: 33046/48278 cut-off events. [2023-08-03 18:19:43,647 INFO L125 PetriNetUnfolderBase]: For 1932/1932 co-relation queries the response was YES. [2023-08-03 18:19:43,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94683 conditions, 48278 events. 33046/48278 cut-off events. For 1932/1932 co-relation queries the response was YES. Maximal size of possible extension queue 1661. Compared 344835 event pairs, 26064 based on Foata normal form. 0/45941 useless extension candidates. Maximal degree in co-relation 26900. Up to 43520 conditions per place. [2023-08-03 18:19:43,943 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-03 18:19:43,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 192 flow [2023-08-03 18:19:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:19:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:19:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-03 18:19:43,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860979462875198 [2023-08-03 18:19:43,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-03 18:19:43,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-03 18:19:43,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:19:43,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-03 18:19:43,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 18:19:43,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 18:19:43,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 18:19:43,957 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 120 flow. Second operand 3 states and 371 transitions. [2023-08-03 18:19:43,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 192 flow [2023-08-03 18:19:43,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 186 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 18:19:43,966 INFO L231 Difference]: Finished difference. Result has 57 places, 42 transitions, 124 flow [2023-08-03 18:19:43,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=42} [2023-08-03 18:19:43,967 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-03 18:19:43,967 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 42 transitions, 124 flow [2023-08-03 18:19:43,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 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 18:19:43,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:19:43,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:19:43,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 18:19:43,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:19:43,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:19:43,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1116366271, now seen corresponding path program 1 times [2023-08-03 18:19:43,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:19:43,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423982021] [2023-08-03 18:19:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:43,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:19:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:44,150 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 18:19:44,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:19:44,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423982021] [2023-08-03 18:19:44,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423982021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:19:44,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401956036] [2023-08-03 18:19:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:44,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:19:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:19:44,158 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 18:19:44,160 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 18:19:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:44,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:19:44,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:19:44,262 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 18:19:44,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:19:44,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401956036] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:19:44,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:19:44,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:19:44,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971234658] [2023-08-03 18:19:44,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:19:44,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:19:44,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:19:44,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:19:44,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:19:44,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 211 [2023-08-03 18:19:44,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 18:19:44,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:19:44,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 211 [2023-08-03 18:19:44,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:19:46,722 INFO L124 PetriNetUnfolderBase]: 31406/45344 cut-off events. [2023-08-03 18:19:46,722 INFO L125 PetriNetUnfolderBase]: For 1143/1143 co-relation queries the response was YES. [2023-08-03 18:19:46,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88696 conditions, 45344 events. 31406/45344 cut-off events. For 1143/1143 co-relation queries the response was YES. Maximal size of possible extension queue 1627. Compared 317165 event pairs, 24928 based on Foata normal form. 0/43256 useless extension candidates. Maximal degree in co-relation 88659. Up to 40987 conditions per place. [2023-08-03 18:19:47,077 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 36 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-03 18:19:47,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 216 flow [2023-08-03 18:19:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:19:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:19:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-03 18:19:47,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5908372827804107 [2023-08-03 18:19:47,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-03 18:19:47,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-03 18:19:47,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:19:47,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-03 18:19:47,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 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 18:19:47,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 18:19:47,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 18:19:47,082 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 124 flow. Second operand 3 states and 374 transitions. [2023-08-03 18:19:47,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 216 flow [2023-08-03 18:19:47,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:19:47,085 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 134 flow [2023-08-03 18:19:47,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-03 18:19:47,085 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2023-08-03 18:19:47,086 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 134 flow [2023-08-03 18:19:47,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 18:19:47,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:19:47,086 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 18:19:47,094 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 18:19:47,291 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 18:19:47,292 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:19:47,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:19:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash 612891331, now seen corresponding path program 1 times [2023-08-03 18:19:47,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:19:47,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060983429] [2023-08-03 18:19:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:47,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:19:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:47,367 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 18:19:47,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:19:47,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060983429] [2023-08-03 18:19:47,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060983429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:19:47,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350005183] [2023-08-03 18:19:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:47,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:19:47,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:19:47,369 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 18:19:47,376 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 18:19:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:47,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:19:47,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:19:47,483 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 18:19:47,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:19:47,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350005183] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:19:47,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:19:47,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 18:19:47,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170346265] [2023-08-03 18:19:47,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:19:47,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:19:47,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:19:47,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:19:47,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:19:47,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 211 [2023-08-03 18:19:47,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 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 18:19:47,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:19:47,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 211 [2023-08-03 18:19:47,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:19:50,103 INFO L124 PetriNetUnfolderBase]: 31394/45327 cut-off events. [2023-08-03 18:19:50,104 INFO L125 PetriNetUnfolderBase]: For 1431/1431 co-relation queries the response was YES. [2023-08-03 18:19:50,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88989 conditions, 45327 events. 31394/45327 cut-off events. For 1431/1431 co-relation queries the response was YES. Maximal size of possible extension queue 1644. Compared 315714 event pairs, 20088 based on Foata normal form. 9/43392 useless extension candidates. Maximal degree in co-relation 25474. Up to 41065 conditions per place. [2023-08-03 18:19:50,371 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 35 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-03 18:19:50,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 50 transitions, 229 flow [2023-08-03 18:19:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:19:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:19:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-03 18:19:50,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630331753554503 [2023-08-03 18:19:50,373 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-03 18:19:50,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-03 18:19:50,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:19:50,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-03 18:19:50,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 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 18:19:50,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 18:19:50,378 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 18:19:50,378 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 134 flow. Second operand 5 states and 594 transitions. [2023-08-03 18:19:50,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 50 transitions, 229 flow [2023-08-03 18:19:50,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 50 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 18:19:50,381 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 150 flow [2023-08-03 18:19:50,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-08-03 18:19:50,383 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2023-08-03 18:19:50,383 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 150 flow [2023-08-03 18:19:50,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 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 18:19:50,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:19:50,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:19:50,391 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 18:19:50,588 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 18:19:50,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:19:50,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:19:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1398772846, now seen corresponding path program 1 times [2023-08-03 18:19:50,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:19:50,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018247034] [2023-08-03 18:19:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:50,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:19:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:50,661 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 18:19:50,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:19:50,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018247034] [2023-08-03 18:19:50,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018247034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:19:50,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179262695] [2023-08-03 18:19:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:50,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:19:50,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:19:50,664 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 18:19:50,680 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 18:19:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:50,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:19:50,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:19:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 18:19:50,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:19:50,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179262695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:19:50,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:19:50,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:19:50,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070686129] [2023-08-03 18:19:50,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:19:50,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:19:50,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:19:50,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:19:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:19:50,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 211 [2023-08-03 18:19:50,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 18:19:50,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:19:50,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 211 [2023-08-03 18:19:50,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:19:53,429 INFO L124 PetriNetUnfolderBase]: 30722/43796 cut-off events. [2023-08-03 18:19:53,430 INFO L125 PetriNetUnfolderBase]: For 889/889 co-relation queries the response was YES. [2023-08-03 18:19:53,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86504 conditions, 43796 events. 30722/43796 cut-off events. For 889/889 co-relation queries the response was YES. Maximal size of possible extension queue 1603. Compared 299817 event pairs, 23570 based on Foata normal form. 0/42068 useless extension candidates. Maximal degree in co-relation 24644. Up to 37736 conditions per place. [2023-08-03 18:19:53,690 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-03 18:19:53,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 262 flow [2023-08-03 18:19:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:19:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:19:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-03 18:19:53,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5971563981042654 [2023-08-03 18:19:53,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-03 18:19:53,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-03 18:19:53,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:19:53,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-03 18:19:53,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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 18:19:53,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 18:19:53,696 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 18:19:53,696 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 150 flow. Second operand 3 states and 378 transitions. [2023-08-03 18:19:53,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 262 flow [2023-08-03 18:19:53,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 255 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 18:19:53,701 INFO L231 Difference]: Finished difference. Result has 63 places, 44 transitions, 155 flow [2023-08-03 18:19:53,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=60, 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=155, PETRI_PLACES=63, PETRI_TRANSITIONS=44} [2023-08-03 18:19:53,704 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2023-08-03 18:19:53,704 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 44 transitions, 155 flow [2023-08-03 18:19:53,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 18:19:53,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:19:53,705 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:19:53,713 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 18:19:53,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:19:53,910 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:19:53,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:19:53,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1317204080, now seen corresponding path program 1 times [2023-08-03 18:19:53,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:19:53,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942569437] [2023-08-03 18:19:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:53,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:19:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:54,136 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 18:19:54,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:19:54,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942569437] [2023-08-03 18:19:54,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942569437] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:19:54,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853348182] [2023-08-03 18:19:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:54,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:19:54,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:19:54,139 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 18:19:54,140 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 18:19:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:54,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:19:54,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:19:54,221 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 18:19:54,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:19:54,238 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 18:19:54,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853348182] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:19:54,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:19:54,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 18:19:54,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139983252] [2023-08-03 18:19:54,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:19:54,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:19:54,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:19:54,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:19:54,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:19:54,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 211 [2023-08-03 18:19:54,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 44 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 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 18:19:54,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:19:54,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 211 [2023-08-03 18:19:54,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:19:56,191 INFO L124 PetriNetUnfolderBase]: 24220/34220 cut-off events. [2023-08-03 18:19:56,191 INFO L125 PetriNetUnfolderBase]: For 3657/3657 co-relation queries the response was YES. [2023-08-03 18:19:56,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70465 conditions, 34220 events. 24220/34220 cut-off events. For 3657/3657 co-relation queries the response was YES. Maximal size of possible extension queue 1295. Compared 221003 event pairs, 14814 based on Foata normal form. 3/34196 useless extension candidates. Maximal degree in co-relation 25033. Up to 31258 conditions per place. [2023-08-03 18:19:56,669 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 36 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-03 18:19:56,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 50 transitions, 241 flow [2023-08-03 18:19:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:19:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:19:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-08-03 18:19:56,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710900473933649 [2023-08-03 18:19:56,686 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-08-03 18:19:56,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-08-03 18:19:56,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:19:56,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-08-03 18:19:56,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 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 18:19:56,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 18:19:56,690 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 18:19:56,690 INFO L175 Difference]: Start difference. First operand has 63 places, 44 transitions, 155 flow. Second operand 4 states and 482 transitions. [2023-08-03 18:19:56,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 50 transitions, 241 flow [2023-08-03 18:19:56,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 50 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:19:56,697 INFO L231 Difference]: Finished difference. Result has 65 places, 43 transitions, 151 flow [2023-08-03 18:19:56,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=65, PETRI_TRANSITIONS=43} [2023-08-03 18:19:56,698 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2023-08-03 18:19:56,698 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 43 transitions, 151 flow [2023-08-03 18:19:56,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 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 18:19:56,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:19:56,698 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:19:56,704 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 18:19:56,899 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 18:19:56,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:19:56,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:19:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1217032717, now seen corresponding path program 1 times [2023-08-03 18:19:56,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:19:56,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290522207] [2023-08-03 18:19:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:56,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:19:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:57,025 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 18:19:57,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:19:57,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290522207] [2023-08-03 18:19:57,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290522207] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:19:57,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904007880] [2023-08-03 18:19:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:57,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:19:57,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:19:57,033 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 18:19:57,037 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 18:19:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:57,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:19:57,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:19:57,144 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 18:19:57,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:19:57,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904007880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:19:57,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:19:57,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:19:57,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743449410] [2023-08-03 18:19:57,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:19:57,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:19:57,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:19:57,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:19:57,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:19:57,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 211 [2023-08-03 18:19:57,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 43 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 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 18:19:57,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:19:57,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 211 [2023-08-03 18:19:57,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:19:58,998 INFO L124 PetriNetUnfolderBase]: 24004/33775 cut-off events. [2023-08-03 18:19:58,999 INFO L125 PetriNetUnfolderBase]: For 3166/3166 co-relation queries the response was YES. [2023-08-03 18:19:59,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69385 conditions, 33775 events. 24004/33775 cut-off events. For 3166/3166 co-relation queries the response was YES. Maximal size of possible extension queue 1295. Compared 217174 event pairs, 6718 based on Foata normal form. 81/33856 useless extension candidates. Maximal degree in co-relation 24653. Up to 30429 conditions per place. [2023-08-03 18:19:59,176 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 48 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-08-03 18:19:59,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 295 flow [2023-08-03 18:19:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:19:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:19:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2023-08-03 18:19:59,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744075829383887 [2023-08-03 18:19:59,179 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 606 transitions. [2023-08-03 18:19:59,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 606 transitions. [2023-08-03 18:19:59,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:19:59,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 606 transitions. [2023-08-03 18:19:59,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 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 18:19:59,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 18:19:59,183 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 18:19:59,183 INFO L175 Difference]: Start difference. First operand has 65 places, 43 transitions, 151 flow. Second operand 5 states and 606 transitions. [2023-08-03 18:19:59,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 295 flow [2023-08-03 18:19:59,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 288 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 18:19:59,189 INFO L231 Difference]: Finished difference. Result has 66 places, 43 transitions, 163 flow [2023-08-03 18:19:59,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=66, PETRI_TRANSITIONS=43} [2023-08-03 18:19:59,190 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2023-08-03 18:19:59,190 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 43 transitions, 163 flow [2023-08-03 18:19:59,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 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 18:19:59,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:19:59,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:19:59,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 18:19:59,398 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 18:19:59,398 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:19:59,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:19:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2001623971, now seen corresponding path program 1 times [2023-08-03 18:19:59,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:19:59,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67826862] [2023-08-03 18:19:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:59,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:19:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:59,470 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 18:19:59,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:19:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67826862] [2023-08-03 18:19:59,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67826862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:19:59,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476549002] [2023-08-03 18:19:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:19:59,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:19:59,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:19:59,472 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 18:19:59,500 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 18:19:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:19:59,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:19:59,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:19:59,577 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 18:19:59,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:19:59,592 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 18:19:59,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476549002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:19:59,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:19:59,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:19:59,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828401009] [2023-08-03 18:19:59,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:19:59,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:19:59,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:19:59,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:19:59,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:19:59,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 211 [2023-08-03 18:19:59,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 43 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 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 18:19:59,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:19:59,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 211 [2023-08-03 18:19:59,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:20:01,354 INFO L124 PetriNetUnfolderBase]: 18982/26404 cut-off events. [2023-08-03 18:20:01,354 INFO L125 PetriNetUnfolderBase]: For 2971/2971 co-relation queries the response was YES. [2023-08-03 18:20:01,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54541 conditions, 26404 events. 18982/26404 cut-off events. For 2971/2971 co-relation queries the response was YES. Maximal size of possible extension queue 1160. Compared 162774 event pairs, 11848 based on Foata normal form. 27/26431 useless extension candidates. Maximal degree in co-relation 19334. Up to 23785 conditions per place. [2023-08-03 18:20:01,489 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 44 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-03 18:20:01,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 57 transitions, 279 flow [2023-08-03 18:20:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:20:01,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:20:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-08-03 18:20:01,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580568720379147 [2023-08-03 18:20:01,492 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-08-03 18:20:01,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-08-03 18:20:01,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:20:01,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-08-03 18:20:01,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 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 18:20:01,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 18:20:01,495 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 18:20:01,495 INFO L175 Difference]: Start difference. First operand has 66 places, 43 transitions, 163 flow. Second operand 4 states and 490 transitions. [2023-08-03 18:20:01,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 57 transitions, 279 flow [2023-08-03 18:20:01,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 57 transitions, 274 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 18:20:01,500 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 154 flow [2023-08-03 18:20:01,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=67, PETRI_TRANSITIONS=42} [2023-08-03 18:20:01,500 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2023-08-03 18:20:01,501 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 154 flow [2023-08-03 18:20:01,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 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 18:20:01,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:20:01,501 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:20:01,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-03 18:20:01,705 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 18:20:01,705 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:20:01,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:20:01,706 INFO L85 PathProgramCache]: Analyzing trace with hash -407407725, now seen corresponding path program 1 times [2023-08-03 18:20:01,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:20:01,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959032715] [2023-08-03 18:20:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:01,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:20:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:20:01,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:20:01,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959032715] [2023-08-03 18:20:01,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959032715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:20:01,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109311671] [2023-08-03 18:20:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:01,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:20:01,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:20:01,764 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 18:20:01,793 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 18:20:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:01,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:20:01,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:20:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:20:01,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:20:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:20:01,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109311671] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:20:01,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:20:01,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:20:01,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821166532] [2023-08-03 18:20:01,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:20:01,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:20:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:20:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:20:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:20:01,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 211 [2023-08-03 18:20:01,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 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 18:20:01,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:20:01,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 211 [2023-08-03 18:20:01,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:20:03,414 INFO L124 PetriNetUnfolderBase]: 17362/23452 cut-off events. [2023-08-03 18:20:03,414 INFO L125 PetriNetUnfolderBase]: For 2359/2359 co-relation queries the response was YES. [2023-08-03 18:20:03,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49267 conditions, 23452 events. 17362/23452 cut-off events. For 2359/2359 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 132765 event pairs, 6886 based on Foata normal form. 243/23695 useless extension candidates. Maximal degree in co-relation 17468. Up to 11794 conditions per place. [2023-08-03 18:20:03,538 INFO L140 encePairwiseOnDemand]: 207/211 looper letters, 52 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-08-03 18:20:03,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 314 flow [2023-08-03 18:20:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:20:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:20:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 499 transitions. [2023-08-03 18:20:03,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912322274881516 [2023-08-03 18:20:03,540 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 499 transitions. [2023-08-03 18:20:03,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 499 transitions. [2023-08-03 18:20:03,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:20:03,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 499 transitions. [2023-08-03 18:20:03,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 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 18:20:03,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 18:20:03,544 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 18:20:03,544 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 154 flow. Second operand 4 states and 499 transitions. [2023-08-03 18:20:03,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 314 flow [2023-08-03 18:20:03,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:20:03,548 INFO L231 Difference]: Finished difference. Result has 69 places, 43 transitions, 168 flow [2023-08-03 18:20:03,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=69, PETRI_TRANSITIONS=43} [2023-08-03 18:20:03,548 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2023-08-03 18:20:03,549 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 43 transitions, 168 flow [2023-08-03 18:20:03,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 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 18:20:03,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:20:03,549 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] [2023-08-03 18:20:03,555 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 18:20:03,755 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 18:20:03,755 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:20:03,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:20:03,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1964942722, now seen corresponding path program 1 times [2023-08-03 18:20:03,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:20:03,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570608597] [2023-08-03 18:20:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:03,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:20:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:20:03,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:20:03,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570608597] [2023-08-03 18:20:03,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570608597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:20:03,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:20:03,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 18:20:03,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119832254] [2023-08-03 18:20:03,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:20:03,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:20:03,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:20:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:20:03,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:20:03,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 211 [2023-08-03 18:20:03,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 43 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 18:20:03,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:20:03,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 211 [2023-08-03 18:20:03,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:20:06,483 INFO L124 PetriNetUnfolderBase]: 32242/43585 cut-off events. [2023-08-03 18:20:06,483 INFO L125 PetriNetUnfolderBase]: For 22337/22337 co-relation queries the response was YES. [2023-08-03 18:20:06,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97964 conditions, 43585 events. 32242/43585 cut-off events. For 22337/22337 co-relation queries the response was YES. Maximal size of possible extension queue 1853. Compared 268622 event pairs, 12763 based on Foata normal form. 9/43563 useless extension candidates. Maximal degree in co-relation 97872. Up to 40561 conditions per place. [2023-08-03 18:20:06,723 INFO L140 encePairwiseOnDemand]: 205/211 looper letters, 56 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-03 18:20:06,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 417 flow [2023-08-03 18:20:06,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:20:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:20:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-03 18:20:06,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5924170616113744 [2023-08-03 18:20:06,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-03 18:20:06,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-03 18:20:06,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:20:06,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-03 18:20:06,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 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 18:20:06,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 18:20:06,727 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 18:20:06,727 INFO L175 Difference]: Start difference. First operand has 69 places, 43 transitions, 168 flow. Second operand 3 states and 375 transitions. [2023-08-03 18:20:06,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 417 flow [2023-08-03 18:20:06,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 409 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 18:20:06,737 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 197 flow [2023-08-03 18:20:06,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-08-03 18:20:06,738 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2023-08-03 18:20:06,738 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 197 flow [2023-08-03 18:20:06,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 18:20:06,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:20:06,739 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:20:06,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 18:20:06,739 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:20:06,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:20:06,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1964942203, now seen corresponding path program 1 times [2023-08-03 18:20:06,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:20:06,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843638226] [2023-08-03 18:20:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:06,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:20:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:20:06,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:20:06,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843638226] [2023-08-03 18:20:06,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843638226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:20:06,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927941054] [2023-08-03 18:20:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:06,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:20:06,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:20:06,796 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 18:20:06,799 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 18:20:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:07,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:20:07,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:20:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:20:07,112 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:20:07,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927941054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:20:07,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:20:07,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:20:07,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200556178] [2023-08-03 18:20:07,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:20:07,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:20:07,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:20:07,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:20:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:20:07,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 211 [2023-08-03 18:20:07,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 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 18:20:07,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:20:07,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 211 [2023-08-03 18:20:07,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:20:08,437 INFO L124 PetriNetUnfolderBase]: 14398/19264 cut-off events. [2023-08-03 18:20:08,438 INFO L125 PetriNetUnfolderBase]: For 7534/7534 co-relation queries the response was YES. [2023-08-03 18:20:08,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49015 conditions, 19264 events. 14398/19264 cut-off events. For 7534/7534 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 101604 event pairs, 506 based on Foata normal form. 729/19992 useless extension candidates. Maximal degree in co-relation 30731. Up to 10878 conditions per place. [2023-08-03 18:20:08,526 INFO L140 encePairwiseOnDemand]: 208/211 looper letters, 73 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2023-08-03 18:20:08,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 85 transitions, 466 flow [2023-08-03 18:20:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:20:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:20:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 617 transitions. [2023-08-03 18:20:08,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5848341232227489 [2023-08-03 18:20:08,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 617 transitions. [2023-08-03 18:20:08,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 617 transitions. [2023-08-03 18:20:08,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:20:08,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 617 transitions. [2023-08-03 18:20:08,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.4) internal successors, (617), 5 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:20:08,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 18:20:08,531 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 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 18:20:08,531 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 197 flow. Second operand 5 states and 617 transitions. [2023-08-03 18:20:08,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 85 transitions, 466 flow [2023-08-03 18:20:08,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 449 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:20:08,550 INFO L231 Difference]: Finished difference. Result has 71 places, 45 transitions, 185 flow [2023-08-03 18:20:08,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=67, 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=5, PETRI_FLOW=185, PETRI_PLACES=71, PETRI_TRANSITIONS=45} [2023-08-03 18:20:08,551 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2023-08-03 18:20:08,551 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 45 transitions, 185 flow [2023-08-03 18:20:08,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 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 18:20:08,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:20:08,552 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] [2023-08-03 18:20:08,559 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 18:20:08,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-03 18:20:08,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:20:08,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:20:08,757 INFO L85 PathProgramCache]: Analyzing trace with hash -208989247, now seen corresponding path program 1 times [2023-08-03 18:20:08,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:20:08,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521612086] [2023-08-03 18:20:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:08,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:20:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:20:08,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:20:08,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521612086] [2023-08-03 18:20:08,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521612086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:20:08,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418582794] [2023-08-03 18:20:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:08,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:20:08,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:20:08,911 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 18:20:08,919 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 18:20:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:09,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 18:20:09,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:20:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:20:09,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:20:09,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418582794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:20:09,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:20:09,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-03 18:20:09,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004341383] [2023-08-03 18:20:09,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:20:09,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:20:09,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:20:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:20:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:20:09,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 211 [2023-08-03 18:20:09,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 45 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 18:20:09,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:20:09,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 211 [2023-08-03 18:20:09,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:20:09,998 INFO L124 PetriNetUnfolderBase]: 13654/17828 cut-off events. [2023-08-03 18:20:09,998 INFO L125 PetriNetUnfolderBase]: For 13342/13342 co-relation queries the response was YES. [2023-08-03 18:20:10,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46315 conditions, 17828 events. 13654/17828 cut-off events. For 13342/13342 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 83057 event pairs, 3039 based on Foata normal form. 64/17891 useless extension candidates. Maximal degree in co-relation 29434. Up to 16539 conditions per place. [2023-08-03 18:20:10,090 INFO L140 encePairwiseOnDemand]: 203/211 looper letters, 61 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2023-08-03 18:20:10,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 467 flow [2023-08-03 18:20:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:20:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:20:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-03 18:20:10,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6034755134281201 [2023-08-03 18:20:10,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-03 18:20:10,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-03 18:20:10,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:20:10,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-03 18:20:10,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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 18:20:10,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 18:20:10,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 18:20:10,094 INFO L175 Difference]: Start difference. First operand has 71 places, 45 transitions, 185 flow. Second operand 3 states and 382 transitions. [2023-08-03 18:20:10,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 467 flow [2023-08-03 18:20:10,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 457 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:20:10,098 INFO L231 Difference]: Finished difference. Result has 71 places, 51 transitions, 227 flow [2023-08-03 18:20:10,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=71, PETRI_TRANSITIONS=51} [2023-08-03 18:20:10,099 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2023-08-03 18:20:10,099 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 51 transitions, 227 flow [2023-08-03 18:20:10,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 18:20:10,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:20:10,099 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] [2023-08-03 18:20:10,105 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 18:20:10,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 18:20:10,304 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:20:10,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:20:10,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1021191012, now seen corresponding path program 1 times [2023-08-03 18:20:10,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:20:10,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299426410] [2023-08-03 18:20:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:20:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 18:20:10,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:20:10,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299426410] [2023-08-03 18:20:10,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299426410] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:20:10,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761612680] [2023-08-03 18:20:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:10,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:20:10,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:20:10,485 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 18:20:10,504 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 18:20:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:10,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 18:20:10,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:20:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 18:20:10,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:20:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 18:20:10,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761612680] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:20:10,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:20:10,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 6 [2023-08-03 18:20:10,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464649702] [2023-08-03 18:20:10,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:20:10,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 18:20:10,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:20:10,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 18:20:10,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-03 18:20:10,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 211 [2023-08-03 18:20:10,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 51 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 108.42857142857143) internal successors, (759), 7 states have internal predecessors, (759), 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 18:20:10,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:20:10,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 211 [2023-08-03 18:20:10,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:20:12,196 INFO L124 PetriNetUnfolderBase]: 17898/24789 cut-off events. [2023-08-03 18:20:12,196 INFO L125 PetriNetUnfolderBase]: For 19965/20063 co-relation queries the response was YES. [2023-08-03 18:20:12,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71237 conditions, 24789 events. 17898/24789 cut-off events. For 19965/20063 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 140441 event pairs, 1011 based on Foata normal form. 889/25659 useless extension candidates. Maximal degree in co-relation 35404. Up to 8664 conditions per place. [2023-08-03 18:20:12,340 INFO L140 encePairwiseOnDemand]: 200/211 looper letters, 147 selfloop transitions, 45 changer transitions 0/199 dead transitions. [2023-08-03 18:20:12,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 199 transitions, 1251 flow [2023-08-03 18:20:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 18:20:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 18:20:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1071 transitions. [2023-08-03 18:20:12,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5639810426540285 [2023-08-03 18:20:12,344 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1071 transitions. [2023-08-03 18:20:12,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1071 transitions. [2023-08-03 18:20:12,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:20:12,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1071 transitions. [2023-08-03 18:20:12,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 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 18:20:12,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 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 18:20:12,348 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 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 18:20:12,348 INFO L175 Difference]: Start difference. First operand has 71 places, 51 transitions, 227 flow. Second operand 9 states and 1071 transitions. [2023-08-03 18:20:12,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 199 transitions, 1251 flow [2023-08-03 18:20:12,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 199 transitions, 1240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:20:12,358 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 587 flow [2023-08-03 18:20:12,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=587, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2023-08-03 18:20:12,358 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2023-08-03 18:20:12,358 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 587 flow [2023-08-03 18:20:12,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.42857142857143) internal successors, (759), 7 states have internal predecessors, (759), 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 18:20:12,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:20:12,359 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] [2023-08-03 18:20:12,363 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 18:20:12,559 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,SelfDestructingSolverStorable13 [2023-08-03 18:20:12,559 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:20:12,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:20:12,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1127099289, now seen corresponding path program 1 times [2023-08-03 18:20:12,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:20:12,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188526810] [2023-08-03 18:20:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:12,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:20:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 18:20:12,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:20:12,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188526810] [2023-08-03 18:20:12,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188526810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:20:12,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907348490] [2023-08-03 18:20:12,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:12,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:20:12,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:20:12,725 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 18:20:12,740 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 18:20:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:12,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-03 18:20:12,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:20:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 18:20:12,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:20:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 18:20:13,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907348490] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:20:13,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:20:13,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 6, 6] total 14 [2023-08-03 18:20:13,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406082044] [2023-08-03 18:20:13,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:20:13,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 18:20:13,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:20:13,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 18:20:13,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-08-03 18:20:13,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 211 [2023-08-03 18:20:13,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 587 flow. Second operand has 16 states, 16 states have (on average 101.6875) internal successors, (1627), 16 states have internal predecessors, (1627), 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 18:20:13,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:20:13,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 211 [2023-08-03 18:20:13,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:20:22,792 INFO L124 PetriNetUnfolderBase]: 85175/115650 cut-off events. [2023-08-03 18:20:22,792 INFO L125 PetriNetUnfolderBase]: For 273968/274956 co-relation queries the response was YES. [2023-08-03 18:20:23,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438582 conditions, 115650 events. 85175/115650 cut-off events. For 273968/274956 co-relation queries the response was YES. Maximal size of possible extension queue 5049. Compared 770736 event pairs, 1819 based on Foata normal form. 1137/116531 useless extension candidates. Maximal degree in co-relation 246211. Up to 42644 conditions per place. [2023-08-03 18:20:23,522 INFO L140 encePairwiseOnDemand]: 198/211 looper letters, 453 selfloop transitions, 344 changer transitions 57/859 dead transitions. [2023-08-03 18:20:23,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 859 transitions, 6823 flow [2023-08-03 18:20:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-03 18:20:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-03 18:20:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3846 transitions. [2023-08-03 18:20:23,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523481258078414 [2023-08-03 18:20:23,530 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3846 transitions. [2023-08-03 18:20:23,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3846 transitions. [2023-08-03 18:20:23,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:20:23,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3846 transitions. [2023-08-03 18:20:23,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 116.54545454545455) internal successors, (3846), 33 states have internal predecessors, (3846), 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 18:20:23,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 211.0) internal successors, (7174), 34 states have internal predecessors, (7174), 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 18:20:23,548 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 211.0) internal successors, (7174), 34 states have internal predecessors, (7174), 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 18:20:23,548 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 587 flow. Second operand 33 states and 3846 transitions. [2023-08-03 18:20:23,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 859 transitions, 6823 flow [2023-08-03 18:20:48,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 859 transitions, 6502 flow, removed 138 selfloop flow, removed 1 redundant places. [2023-08-03 18:20:48,481 INFO L231 Difference]: Finished difference. Result has 128 places, 474 transitions, 4212 flow [2023-08-03 18:20:48,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4212, PETRI_PLACES=128, PETRI_TRANSITIONS=474} [2023-08-03 18:20:48,481 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2023-08-03 18:20:48,482 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 474 transitions, 4212 flow [2023-08-03 18:20:48,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 101.6875) internal successors, (1627), 16 states have internal predecessors, (1627), 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 18:20:48,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:20:48,483 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] [2023-08-03 18:20:48,488 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 18:20:48,688 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,SelfDestructingSolverStorable14 [2023-08-03 18:20:48,688 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:20:48,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:20:48,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1291698305, now seen corresponding path program 1 times [2023-08-03 18:20:48,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:20:48,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801083429] [2023-08-03 18:20:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:48,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:20:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:20:48,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:20:48,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801083429] [2023-08-03 18:20:48,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801083429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:20:48,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871235766] [2023-08-03 18:20:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:20:48,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:20:48,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:20:48,817 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 18:20:48,821 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 18:20:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:20:48,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-03 18:20:48,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:20:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:20:49,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:20:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:20:49,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871235766] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:20:49,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:20:49,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 6, 6] total 14 [2023-08-03 18:20:49,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753506996] [2023-08-03 18:20:49,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:20:49,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 18:20:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:20:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 18:20:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2023-08-03 18:20:49,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 211 [2023-08-03 18:20:49,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 474 transitions, 4212 flow. Second operand has 16 states, 16 states have (on average 107.6875) internal successors, (1723), 16 states have internal predecessors, (1723), 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 18:20:49,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:20:49,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 211 [2023-08-03 18:20:49,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:21:19,570 INFO L124 PetriNetUnfolderBase]: 174611/240670 cut-off events. [2023-08-03 18:21:19,570 INFO L125 PetriNetUnfolderBase]: For 1102069/1104069 co-relation queries the response was YES. [2023-08-03 18:21:21,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1077508 conditions, 240670 events. 174611/240670 cut-off events. For 1102069/1104069 co-relation queries the response was YES. Maximal size of possible extension queue 12463. Compared 1863317 event pairs, 1032 based on Foata normal form. 2463/242625 useless extension candidates. Maximal degree in co-relation 1031993. Up to 69655 conditions per place. [2023-08-03 18:21:22,285 INFO L140 encePairwiseOnDemand]: 198/211 looper letters, 838 selfloop transitions, 1477 changer transitions 471/2841 dead transitions. [2023-08-03 18:21:22,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 2841 transitions, 31686 flow [2023-08-03 18:21:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-03 18:21:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-03 18:21:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3604 transitions. [2023-08-03 18:21:22,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5693522906793049 [2023-08-03 18:21:22,292 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3604 transitions. [2023-08-03 18:21:22,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3604 transitions. [2023-08-03 18:21:22,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:21:22,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3604 transitions. [2023-08-03 18:21:22,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 120.13333333333334) internal successors, (3604), 30 states have internal predecessors, (3604), 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 18:21:22,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 211.0) internal successors, (6541), 31 states have internal predecessors, (6541), 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 18:21:22,309 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 211.0) internal successors, (6541), 31 states have internal predecessors, (6541), 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 18:21:22,309 INFO L175 Difference]: Start difference. First operand has 128 places, 474 transitions, 4212 flow. Second operand 30 states and 3604 transitions. [2023-08-03 18:21:22,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 2841 transitions, 31686 flow [2023-08-03 18:26:55,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 2841 transitions, 26325 flow, removed 2593 selfloop flow, removed 3 redundant places. [2023-08-03 18:26:55,686 INFO L231 Difference]: Finished difference. Result has 168 places, 1899 transitions, 18349 flow [2023-08-03 18:26:55,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=18349, PETRI_PLACES=168, PETRI_TRANSITIONS=1899} [2023-08-03 18:26:55,687 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 114 predicate places. [2023-08-03 18:26:55,687 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 1899 transitions, 18349 flow [2023-08-03 18:26:55,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.6875) internal successors, (1723), 16 states have internal predecessors, (1723), 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 18:26:55,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:26:55,688 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] [2023-08-03 18:26:55,694 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 18:26:55,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-03 18:26:55,894 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:26:55,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:26:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1255784025, now seen corresponding path program 2 times [2023-08-03 18:26:55,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:26:55,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403511599] [2023-08-03 18:26:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:26:55,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:26:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:26:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:26:55,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:26:55,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403511599] [2023-08-03 18:26:55,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403511599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:26:55,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273779456] [2023-08-03 18:26:56,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 18:26:56,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:26:56,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:26:56,001 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 18:26:56,034 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 18:26:56,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 18:26:56,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 18:26:56,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-03 18:26:56,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:26:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:26:56,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:26:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 18:26:56,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273779456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:26:56,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:26:56,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-03 18:26:56,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986347091] [2023-08-03 18:26:56,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:26:56,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 18:26:56,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:26:56,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 18:26:56,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:26:56,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 211 [2023-08-03 18:26:56,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 1899 transitions, 18349 flow. Second operand has 6 states, 6 states have (on average 116.83333333333333) internal successors, (701), 6 states have internal predecessors, (701), 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 18:26:56,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:26:56,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 211 [2023-08-03 18:26:56,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand