/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix045_power.oepc_pso.oepc_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:45:48,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:45:48,042 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:45:48,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:45:48,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:45:48,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:45:48,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:45:48,063 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:45:48,063 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:45:48,065 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:45:48,066 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:45:48,067 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:45:48,068 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:45:48,068 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:45:48,068 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:45:48,068 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:45:48,068 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:45:48,068 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:45:48,069 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:45:48,069 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:45:48,069 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:45:48,069 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:45:48,069 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:45:48,069 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:45:48,070 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:45:48,070 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:45:48,070 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:45:48,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:45:48,071 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:45:48,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:45:48,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:45:48,072 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:45:48,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:45:48,072 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:45:48,072 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:45:48,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:45:48,072 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:45:48,072 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:45:48,072 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:45:48,072 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:45:48,073 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:45:48,073 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:45:48,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:45:48,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:45:48,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:45:48,224 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:45:48,225 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:45:48,225 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix045_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:45:49,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:45:49,314 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:45:49,314 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix045_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:45:49,325 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f70dac1b8/707e72c985824627af4c627f4f919dc4/FLAGa37ba2b39 [2023-08-03 23:45:49,333 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f70dac1b8/707e72c985824627af4c627f4f919dc4 [2023-08-03 23:45:49,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:45:49,336 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:45:49,336 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:45:49,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:45:49,342 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:45:49,343 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,343 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6a775a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49, skipping insertion in model container [2023-08-03 23:45:49,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,380 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:45:49,488 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_mix045_power.oepc_pso.oepc_rmo.oepc_bound2.i[969,982] [2023-08-03 23:45:49,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:45:49,635 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:45:49,642 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_mix045_power.oepc_pso.oepc_rmo.oepc_bound2.i[969,982] [2023-08-03 23:45:49,647 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:45:49,648 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:45:49,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:45:49,690 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:45:49,690 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:45:49,695 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:45:49,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49 WrapperNode [2023-08-03 23:45:49,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:45:49,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:45:49,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:45:49,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:45:49,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,714 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,731 INFO L138 Inliner]: procedures = 176, calls = 58, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 153 [2023-08-03 23:45:49,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:45:49,732 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:45:49,732 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:45:49,732 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:45:49,738 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,748 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,750 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,755 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:45:49,755 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:45:49,755 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:45:49,755 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:45:49,756 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (1/1) ... [2023-08-03 23:45:49,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:45:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:45:49,778 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 23:45:49,779 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 23:45:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:45:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:45:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:45:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:45:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:45:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:45:49,798 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:45:49,798 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:45:49,798 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:45:49,799 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:45:49,799 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:45:49,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:45:49,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:45:49,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:45:49,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:45:49,800 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 23:45:49,888 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:45:49,889 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:45:50,131 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:45:50,230 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:45:50,231 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:45:50,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:45:50 BoogieIcfgContainer [2023-08-03 23:45:50,233 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:45:50,237 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:45:50,237 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:45:50,239 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:45:50,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:45:49" (1/3) ... [2023-08-03 23:45:50,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b35a96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:45:50, skipping insertion in model container [2023-08-03 23:45:50,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:45:49" (2/3) ... [2023-08-03 23:45:50,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b35a96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:45:50, skipping insertion in model container [2023-08-03 23:45:50,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:45:50" (3/3) ... [2023-08-03 23:45:50,243 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix045_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:45:50,248 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:45:50,253 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:45:50,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:45:50,254 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:45:50,294 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:45:50,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 132 transitions, 279 flow [2023-08-03 23:45:50,398 INFO L124 PetriNetUnfolderBase]: 30/457 cut-off events. [2023-08-03 23:45:50,399 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:45:50,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 457 events. 30/457 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2036 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 270. Up to 16 conditions per place. [2023-08-03 23:45:50,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 132 transitions, 279 flow [2023-08-03 23:45:50,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 103 transitions, 221 flow [2023-08-03 23:45:50,407 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:45:50,413 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 103 transitions, 221 flow [2023-08-03 23:45:50,414 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 103 transitions, 221 flow [2023-08-03 23:45:50,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 103 transitions, 221 flow [2023-08-03 23:45:50,431 INFO L124 PetriNetUnfolderBase]: 6/225 cut-off events. [2023-08-03 23:45:50,432 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:45:50,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 225 events. 6/225 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 675 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-08-03 23:45:50,434 INFO L119 LiptonReduction]: Number of co-enabled transitions 1552 [2023-08-03 23:45:53,008 INFO L134 LiptonReduction]: Checked pairs total: 3600 [2023-08-03 23:45:53,008 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-03 23:45:53,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:45:53,022 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;@7e10773, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:45:53,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:45:53,025 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:45:53,025 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-03 23:45:53,025 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:45:53,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:45:53,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:45:53,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:45:53,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:45:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1133889006, now seen corresponding path program 1 times [2023-08-03 23:45:53,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:45:53,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101464053] [2023-08-03 23:45:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:45:53,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:45:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:45:53,207 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 23:45:53,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:45:53,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101464053] [2023-08-03 23:45:53,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101464053] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:45:53,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:45:53,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:45:53,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771285116] [2023-08-03 23:45:53,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:45:53,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:45:53,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:45:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:45:53,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:45:53,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 214 [2023-08-03 23:45:53,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states 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 23:45:53,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:45:53,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 214 [2023-08-03 23:45:53,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:45:53,385 INFO L124 PetriNetUnfolderBase]: 579/987 cut-off events. [2023-08-03 23:45:53,386 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:45:53,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 987 events. 579/987 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4656 event pairs, 295 based on Foata normal form. 0/880 useless extension candidates. Maximal degree in co-relation 2012. Up to 935 conditions per place. [2023-08-03 23:45:53,395 INFO L140 encePairwiseOnDemand]: 211/214 looper letters, 25 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 23:45:53,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 133 flow [2023-08-03 23:45:53,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:45:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:45:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-08-03 23:45:53,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669781931464174 [2023-08-03 23:45:53,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-08-03 23:45:53,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-08-03 23:45:53,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:45:53,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-08-03 23:45:53,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 23:45:53,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 23:45:53,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 23:45:53,422 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 69 flow. Second operand 3 states and 364 transitions. [2023-08-03 23:45:53,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 133 flow [2023-08-03 23:45:53,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:45:53,425 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 77 flow [2023-08-03 23:45:53,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-03 23:45:53,429 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-03 23:45:53,429 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 77 flow [2023-08-03 23:45:53,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states 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 23:45:53,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:45:53,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:45:53,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:45:53,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:45:53,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:45:53,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1127738728, now seen corresponding path program 1 times [2023-08-03 23:45:53,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:45:53,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884354944] [2023-08-03 23:45:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:45:53,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:45:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:45:53,462 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:45:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:45:53,507 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:45:53,507 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:45:53,508 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:45:53,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:45:53,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:45:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:45:53,510 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:45:53,511 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:45:53,512 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:45:53,512 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:45:53,540 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:45:53,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 159 transitions, 354 flow [2023-08-03 23:45:53,653 INFO L124 PetriNetUnfolderBase]: 93/1414 cut-off events. [2023-08-03 23:45:53,653 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:45:53,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 1414 events. 93/1414 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9866 event pairs, 0 based on Foata normal form. 0/1253 useless extension candidates. Maximal degree in co-relation 1019. Up to 54 conditions per place. [2023-08-03 23:45:53,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 159 transitions, 354 flow [2023-08-03 23:45:53,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 130 transitions, 296 flow [2023-08-03 23:45:53,658 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:45:53,659 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 130 transitions, 296 flow [2023-08-03 23:45:53,659 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 130 transitions, 296 flow [2023-08-03 23:45:53,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 130 transitions, 296 flow [2023-08-03 23:45:53,706 INFO L124 PetriNetUnfolderBase]: 12/631 cut-off events. [2023-08-03 23:45:53,706 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:45:53,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 631 events. 12/631 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3306 event pairs, 0 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 497. Up to 27 conditions per place. [2023-08-03 23:45:53,715 INFO L119 LiptonReduction]: Number of co-enabled transitions 4396 [2023-08-03 23:45:56,255 INFO L134 LiptonReduction]: Checked pairs total: 15904 [2023-08-03 23:45:56,255 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-03 23:45:56,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:45:56,257 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;@7e10773, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:45:56,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:45:56,262 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:45:56,262 INFO L124 PetriNetUnfolderBase]: 0/61 cut-off events. [2023-08-03 23:45:56,262 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:45:56,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:45:56,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:45:56,263 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:45:56,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:45:56,263 INFO L85 PathProgramCache]: Analyzing trace with hash -650188135, now seen corresponding path program 1 times [2023-08-03 23:45:56,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:45:56,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483346422] [2023-08-03 23:45:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:45:56,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:45:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:45:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:45:56,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:45:56,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483346422] [2023-08-03 23:45:56,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483346422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:45:56,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:45:56,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:45:56,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557804434] [2023-08-03 23:45:56,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:45:56,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:45:56,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:45:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:45:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:45:56,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 246 [2023-08-03 23:45:56,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 23:45:56,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:45:56,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 246 [2023-08-03 23:45:56,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:46:12,061 INFO L124 PetriNetUnfolderBase]: 150910/200464 cut-off events. [2023-08-03 23:46:12,061 INFO L125 PetriNetUnfolderBase]: For 10780/10780 co-relation queries the response was YES. [2023-08-03 23:46:12,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404241 conditions, 200464 events. 150910/200464 cut-off events. For 10780/10780 co-relation queries the response was YES. Maximal size of possible extension queue 5813. Compared 1377224 event pairs, 118610 based on Foata normal form. 0/181133 useless extension candidates. Maximal degree in co-relation 85300. Up to 191286 conditions per place. [2023-08-03 23:46:13,308 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 40 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-03 23:46:13,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 56 transitions, 232 flow [2023-08-03 23:46:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:46:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:46:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-08-03 23:46:13,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5867208672086721 [2023-08-03 23:46:13,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-08-03 23:46:13,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-08-03 23:46:13,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:46:13,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-08-03 23:46:13,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 23:46:13,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 23:46:13,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 23:46:13,314 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 136 flow. Second operand 3 states and 433 transitions. [2023-08-03 23:46:13,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 56 transitions, 232 flow [2023-08-03 23:46:13,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 56 transitions, 226 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:46:13,326 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 142 flow [2023-08-03 23:46:13,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2023-08-03 23:46:13,326 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-03 23:46:13,326 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 142 flow [2023-08-03 23:46:13,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 23:46:13,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:46:13,327 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:46:13,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:46:13,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:46:13,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:46:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1708239574, now seen corresponding path program 1 times [2023-08-03 23:46:13,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:46:13,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048461306] [2023-08-03 23:46:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:46:13,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:46:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:46:13,373 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 23:46:13,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:46:13,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048461306] [2023-08-03 23:46:13,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048461306] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:46:13,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225588466] [2023-08-03 23:46:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:46:13,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:46:13,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:46:13,376 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 23:46:13,385 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 23:46:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:46:13,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:46:13,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:46:13,504 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 23:46:13,505 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:46:13,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225588466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:46:13,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:46:13,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:46:13,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927306947] [2023-08-03 23:46:13,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:46:13,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:46:13,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:46:13,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:46:13,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:46:13,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 246 [2023-08-03 23:46:13,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states 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 23:46:13,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:46:13,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 246 [2023-08-03 23:46:13,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:46:29,616 INFO L124 PetriNetUnfolderBase]: 150870/200599 cut-off events. [2023-08-03 23:46:29,617 INFO L125 PetriNetUnfolderBase]: For 9965/9965 co-relation queries the response was YES. [2023-08-03 23:46:30,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403769 conditions, 200599 events. 150870/200599 cut-off events. For 9965/9965 co-relation queries the response was YES. Maximal size of possible extension queue 5815. Compared 1382470 event pairs, 91710 based on Foata normal form. 25/181358 useless extension candidates. Maximal degree in co-relation 100112. Up to 191157 conditions per place. [2023-08-03 23:46:30,570 INFO L140 encePairwiseOnDemand]: 242/246 looper letters, 47 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-03 23:46:30,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 270 flow [2023-08-03 23:46:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:46:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:46:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2023-08-03 23:46:30,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-08-03 23:46:30,572 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2023-08-03 23:46:30,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2023-08-03 23:46:30,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:46:30,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2023-08-03 23:46:30,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 0 states have call successors, (0), 0 states 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 23:46:30,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states 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 23:46:30,576 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states 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 23:46:30,576 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 142 flow. Second operand 5 states and 697 transitions. [2023-08-03 23:46:30,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 270 flow [2023-08-03 23:46:30,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:46:30,578 INFO L231 Difference]: Finished difference. Result has 69 places, 51 transitions, 156 flow [2023-08-03 23:46:30,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=51} [2023-08-03 23:46:30,578 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2023-08-03 23:46:30,579 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 51 transitions, 156 flow [2023-08-03 23:46:30,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states 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 23:46:30,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:46:30,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:46:30,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:46:30,784 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 23:46:30,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:46:30,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:46:30,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1915055375, now seen corresponding path program 1 times [2023-08-03 23:46:30,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:46:30,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147861365] [2023-08-03 23:46:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:46:30,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:46:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:46:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:46:30,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:46:30,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147861365] [2023-08-03 23:46:30,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147861365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:46:30,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737802884] [2023-08-03 23:46:30,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:46:30,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:46:30,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:46:31,185 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 23:46:31,186 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 23:46:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:46:31,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:46:31,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:46:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:46:31,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:46:31,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737802884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:46:31,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:46:31,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:46:31,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087870316] [2023-08-03 23:46:31,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:46:31,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:46:31,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:46:31,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:46:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:46:31,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 246 [2023-08-03 23:46:31,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 51 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states 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 23:46:31,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:46:31,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 246 [2023-08-03 23:46:31,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:46:46,148 INFO L124 PetriNetUnfolderBase]: 146266/196151 cut-off events. [2023-08-03 23:46:46,148 INFO L125 PetriNetUnfolderBase]: For 9275/9275 co-relation queries the response was YES. [2023-08-03 23:46:46,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393310 conditions, 196151 events. 146266/196151 cut-off events. For 9275/9275 co-relation queries the response was YES. Maximal size of possible extension queue 5846. Compared 1373617 event pairs, 117292 based on Foata normal form. 0/177676 useless extension candidates. Maximal degree in co-relation 126799. Up to 184350 conditions per place. [2023-08-03 23:46:47,132 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 48 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-03 23:46:47,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 284 flow [2023-08-03 23:46:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:46:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:46:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-03 23:46:47,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962059620596206 [2023-08-03 23:46:47,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-03 23:46:47,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-03 23:46:47,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:46:47,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-03 23:46:47,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:46:47,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 23:46:47,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 23:46:47,136 INFO L175 Difference]: Start difference. First operand has 69 places, 51 transitions, 156 flow. Second operand 3 states and 440 transitions. [2023-08-03 23:46:47,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 284 flow [2023-08-03 23:46:47,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 277 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:46:47,143 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 164 flow [2023-08-03 23:46:47,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-08-03 23:46:47,144 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-03 23:46:47,144 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 164 flow [2023-08-03 23:46:47,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states 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 23:46:47,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:46:47,145 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:46:47,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 23:46:47,351 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 23:46:47,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:46:47,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:46:47,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1514796193, now seen corresponding path program 1 times [2023-08-03 23:46:47,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:46:47,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462076373] [2023-08-03 23:46:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:46:47,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:46:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:46:47,397 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 23:46:47,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:46:47,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462076373] [2023-08-03 23:46:47,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462076373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:46:47,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109660700] [2023-08-03 23:46:47,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:46:47,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:46:47,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:46:47,399 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 23:46:47,403 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 23:46:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:46:47,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:46:47,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:46:47,498 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 23:46:47,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:46:47,516 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 23:46:47,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109660700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:46:47,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:46:47,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:46:47,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656897316] [2023-08-03 23:46:47,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:46:47,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:46:47,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:46:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:46:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:46:47,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 246 [2023-08-03 23:46:47,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 23:46:47,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:46:47,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 246 [2023-08-03 23:46:47,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:47:00,222 INFO L124 PetriNetUnfolderBase]: 126173/169352 cut-off events. [2023-08-03 23:47:00,222 INFO L125 PetriNetUnfolderBase]: For 8780/8780 co-relation queries the response was YES. [2023-08-03 23:47:00,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339038 conditions, 169352 events. 126173/169352 cut-off events. For 8780/8780 co-relation queries the response was YES. Maximal size of possible extension queue 5211. Compared 1163603 event pairs, 74825 based on Foata normal form. 5/153389 useless extension candidates. Maximal degree in co-relation 83194. Up to 158221 conditions per place. [2023-08-03 23:47:01,115 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 48 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-03 23:47:01,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 64 transitions, 285 flow [2023-08-03 23:47:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:47:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:47:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 567 transitions. [2023-08-03 23:47:01,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2023-08-03 23:47:01,119 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 567 transitions. [2023-08-03 23:47:01,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 567 transitions. [2023-08-03 23:47:01,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:47:01,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 567 transitions. [2023-08-03 23:47:01,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states 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 23:47:01,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 23:47:01,122 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 23:47:01,122 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 164 flow. Second operand 4 states and 567 transitions. [2023-08-03 23:47:01,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 64 transitions, 285 flow [2023-08-03 23:47:01,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 64 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:47:01,125 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 159 flow [2023-08-03 23:47:01,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-08-03 23:47:01,126 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-03 23:47:01,126 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 159 flow [2023-08-03 23:47:01,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 23:47:01,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:47:01,126 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:47:01,132 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 23:47:01,330 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 23:47:01,333 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:47:01,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:47:01,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1556353078, now seen corresponding path program 1 times [2023-08-03 23:47:01,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:47:01,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658358307] [2023-08-03 23:47:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:47:01,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:47:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:47:01,390 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 23:47:01,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:47:01,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658358307] [2023-08-03 23:47:01,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658358307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:47:01,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352221061] [2023-08-03 23:47:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:47:01,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:47:01,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:47:01,393 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 23:47:01,395 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 23:47:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:47:01,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:47:01,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:47:01,484 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 23:47:01,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:47:01,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352221061] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:47:01,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:47:01,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:47:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140627453] [2023-08-03 23:47:01,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:47:01,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:47:01,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:47:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:47:01,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:47:01,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 246 [2023-08-03 23:47:01,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 23:47:01,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:47:01,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 246 [2023-08-03 23:47:01,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:47:14,060 INFO L124 PetriNetUnfolderBase]: 124933/168418 cut-off events. [2023-08-03 23:47:14,061 INFO L125 PetriNetUnfolderBase]: For 7418/7418 co-relation queries the response was YES. [2023-08-03 23:47:14,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336620 conditions, 168418 events. 124933/168418 cut-off events. For 7418/7418 co-relation queries the response was YES. Maximal size of possible extension queue 5306. Compared 1171931 event pairs, 32068 based on Foata normal form. 400/153110 useless extension candidates. Maximal degree in co-relation 126993. Up to 154115 conditions per place. [2023-08-03 23:47:15,092 INFO L140 encePairwiseOnDemand]: 242/246 looper letters, 69 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-03 23:47:15,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 373 flow [2023-08-03 23:47:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:47:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:47:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 718 transitions. [2023-08-03 23:47:15,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.583739837398374 [2023-08-03 23:47:15,098 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 718 transitions. [2023-08-03 23:47:15,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 718 transitions. [2023-08-03 23:47:15,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:47:15,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 718 transitions. [2023-08-03 23:47:15,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:47:15,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states 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 23:47:15,101 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states 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 23:47:15,101 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 159 flow. Second operand 5 states and 718 transitions. [2023-08-03 23:47:15,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 373 flow [2023-08-03 23:47:15,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 366 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:47:15,105 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 169 flow [2023-08-03 23:47:15,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2023-08-03 23:47:15,106 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2023-08-03 23:47:15,106 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 169 flow [2023-08-03 23:47:15,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 23:47:15,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:47:15,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:47:15,110 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 23:47:15,310 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 23:47:15,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:47:15,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:47:15,310 INFO L85 PathProgramCache]: Analyzing trace with hash -841053692, now seen corresponding path program 1 times [2023-08-03 23:47:15,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:47:15,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701629581] [2023-08-03 23:47:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:47:15,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:47:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:47:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:47:15,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:47:15,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701629581] [2023-08-03 23:47:15,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701629581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:47:15,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270445939] [2023-08-03 23:47:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:47:15,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:47:15,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:47:15,366 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 23:47:15,368 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 23:47:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:47:15,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:47:15,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:47:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:47:15,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:47:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:47:15,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270445939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:47:15,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:47:15,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:47:15,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668203729] [2023-08-03 23:47:15,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:47:15,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:47:15,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:47:15,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:47:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:47:15,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 246 [2023-08-03 23:47:15,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states 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 23:47:15,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:47:15,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 246 [2023-08-03 23:47:15,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:47:26,258 INFO L124 PetriNetUnfolderBase]: 104198/139283 cut-off events. [2023-08-03 23:47:26,258 INFO L125 PetriNetUnfolderBase]: For 8760/8760 co-relation queries the response was YES. [2023-08-03 23:47:26,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279970 conditions, 139283 events. 104198/139283 cut-off events. For 8760/8760 co-relation queries the response was YES. Maximal size of possible extension queue 4648. Compared 931385 event pairs, 65348 based on Foata normal form. 100/126715 useless extension candidates. Maximal degree in co-relation 105799. Up to 127416 conditions per place. [2023-08-03 23:47:27,096 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 61 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-08-03 23:47:27,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 76 transitions, 343 flow [2023-08-03 23:47:27,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:47:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:47:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 580 transitions. [2023-08-03 23:47:27,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2023-08-03 23:47:27,098 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 580 transitions. [2023-08-03 23:47:27,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 580 transitions. [2023-08-03 23:47:27,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:47:27,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 580 transitions. [2023-08-03 23:47:27,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states 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 23:47:27,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 23:47:27,101 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 23:47:27,101 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 169 flow. Second operand 4 states and 580 transitions. [2023-08-03 23:47:27,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 76 transitions, 343 flow [2023-08-03 23:47:27,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 338 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:47:27,105 INFO L231 Difference]: Finished difference. Result has 74 places, 50 transitions, 162 flow [2023-08-03 23:47:27,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=74, PETRI_TRANSITIONS=50} [2023-08-03 23:47:27,107 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2023-08-03 23:47:27,108 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 50 transitions, 162 flow [2023-08-03 23:47:27,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states 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 23:47:27,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:47:27,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:47:27,114 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 23:47:27,312 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 23:47:27,312 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:47:27,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:47:27,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2052502299, now seen corresponding path program 1 times [2023-08-03 23:47:27,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:47:27,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950756106] [2023-08-03 23:47:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:47:27,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:47:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:47:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:47:27,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:47:27,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950756106] [2023-08-03 23:47:27,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950756106] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:47:27,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663934161] [2023-08-03 23:47:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:47:27,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:47:27,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:47:27,426 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 23:47:27,463 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 23:47:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:47:27,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:47:27,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:47:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:47:27,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:47:27,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663934161] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:47:27,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:47:27,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:47:27,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106823682] [2023-08-03 23:47:27,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:47:27,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:47:27,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:47:27,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:47:27,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:47:27,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 246 [2023-08-03 23:47:27,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 50 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:47:27,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:47:27,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 246 [2023-08-03 23:47:27,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:47:33,558 INFO L124 PetriNetUnfolderBase]: 57198/80408 cut-off events. [2023-08-03 23:47:33,558 INFO L125 PetriNetUnfolderBase]: For 6455/6455 co-relation queries the response was YES. [2023-08-03 23:47:33,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162995 conditions, 80408 events. 57198/80408 cut-off events. For 6455/6455 co-relation queries the response was YES. Maximal size of possible extension queue 2762. Compared 556828 event pairs, 2958 based on Foata normal form. 10000/83740 useless extension candidates. Maximal degree in co-relation 61409. Up to 58800 conditions per place. [2023-08-03 23:47:33,778 INFO L140 encePairwiseOnDemand]: 244/246 looper letters, 0 selfloop transitions, 0 changer transitions 81/81 dead transitions. [2023-08-03 23:47:33,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 81 transitions, 362 flow [2023-08-03 23:47:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:47:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:47:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 589 transitions. [2023-08-03 23:47:33,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5985772357723578 [2023-08-03 23:47:33,780 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 589 transitions. [2023-08-03 23:47:33,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 589 transitions. [2023-08-03 23:47:33,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:47:33,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 589 transitions. [2023-08-03 23:47:33,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.25) internal successors, (589), 4 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 23:47:33,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 23:47:33,782 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 23:47:33,782 INFO L175 Difference]: Start difference. First operand has 74 places, 50 transitions, 162 flow. Second operand 4 states and 589 transitions. [2023-08-03 23:47:33,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 81 transitions, 362 flow [2023-08-03 23:47:34,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:47:34,443 INFO L231 Difference]: Finished difference. Result has 72 places, 0 transitions, 0 flow [2023-08-03 23:47:34,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=72, PETRI_TRANSITIONS=0} [2023-08-03 23:47:34,444 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-03 23:47:34,444 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 0 transitions, 0 flow [2023-08-03 23:47:34,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:47:34,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:47:34,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:47:34,444 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:47:34,449 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 23:47:34,649 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 23:47:34,649 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:47:34,650 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:47:34,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 159 transitions, 354 flow [2023-08-03 23:47:34,722 INFO L124 PetriNetUnfolderBase]: 93/1414 cut-off events. [2023-08-03 23:47:34,722 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:47:34,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 1414 events. 93/1414 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9866 event pairs, 0 based on Foata normal form. 0/1253 useless extension candidates. Maximal degree in co-relation 1019. Up to 54 conditions per place. [2023-08-03 23:47:34,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 159 transitions, 354 flow [2023-08-03 23:47:34,726 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 159 transitions, 354 flow [2023-08-03 23:47:34,726 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:47:34,726 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 159 transitions, 354 flow [2023-08-03 23:47:34,727 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 159 transitions, 354 flow [2023-08-03 23:47:34,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 159 transitions, 354 flow [2023-08-03 23:47:34,799 INFO L124 PetriNetUnfolderBase]: 93/1414 cut-off events. [2023-08-03 23:47:34,799 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:47:34,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 1414 events. 93/1414 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9866 event pairs, 0 based on Foata normal form. 0/1253 useless extension candidates. Maximal degree in co-relation 1019. Up to 54 conditions per place. [2023-08-03 23:47:34,817 INFO L119 LiptonReduction]: Number of co-enabled transitions 7180 [2023-08-03 23:47:37,643 INFO L134 LiptonReduction]: Checked pairs total: 26089 [2023-08-03 23:47:37,643 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-03 23:47:37,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:47:37,644 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;@7e10773, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:47:37,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:47:37,646 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:47:37,646 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-03 23:47:37,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:47:37,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:47:37,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 23:47:37,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:47:37,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:47:37,646 INFO L85 PathProgramCache]: Analyzing trace with hash 28728508, now seen corresponding path program 1 times [2023-08-03 23:47:37,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:47:37,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631603159] [2023-08-03 23:47:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:47:37,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:47:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:47:37,712 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 23:47:37,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:47:37,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631603159] [2023-08-03 23:47:37,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631603159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:47:37,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:47:37,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 23:47:37,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2729271] [2023-08-03 23:47:37,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:47:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:47:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:47:37,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:47:37,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:47:37,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 277 [2023-08-03 23:47:37,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 23:47:37,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:47:37,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 277 [2023-08-03 23:47:37,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand