/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_safe018_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:40:12,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:40:12,395 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:40:12,401 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:40:12,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:40:12,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:40:12,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:40:12,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:40:12,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:40:12,431 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:40:12,431 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:40:12,432 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:40:12,432 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:40:12,436 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:40:12,436 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:40:12,436 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:40:12,436 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:40:12,437 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:40:12,437 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:40:12,437 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:40:12,437 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:40:12,437 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:40:12,438 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:40:12,438 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:40:12,439 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:40:12,439 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:40:12,439 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:40:12,440 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:40:12,440 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:40:12,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:40:12,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:40:12,441 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:40:12,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:40:12,441 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:40:12,441 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:40:12,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:40:12,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:40:12,442 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:40:12,442 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:40:12,442 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:40:12,442 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:40:12,443 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:40:12,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:40:12,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:40:12,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:40:12,706 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:40:12,707 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:40:12,707 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_power.oepc_bound2.i [2023-08-04 00:40:13,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:40:14,130 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:40:14,130 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_power.oepc_bound2.i [2023-08-04 00:40:14,152 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af8330e06/52b61817f9ab441fa6363f7648af10e0/FLAGe9a0b45b6 [2023-08-04 00:40:14,162 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af8330e06/52b61817f9ab441fa6363f7648af10e0 [2023-08-04 00:40:14,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:40:14,169 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:40:14,171 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:40:14,171 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:40:14,175 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:40:14,176 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@182cdeb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14, skipping insertion in model container [2023-08-04 00:40:14,177 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,234 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:40:14,404 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_safe018_power.oepc_bound2.i[995,1008] [2023-08-04 00:40:14,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:40:14,637 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:40:14,648 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_safe018_power.oepc_bound2.i[995,1008] [2023-08-04 00:40:14,666 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:40:14,668 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:40:14,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:40:14,716 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:40:14,717 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:40:14,723 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:40:14,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14 WrapperNode [2023-08-04 00:40:14,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:40:14,724 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:40:14,724 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:40:14,724 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:40:14,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,746 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,769 INFO L138 Inliner]: procedures = 176, calls = 67, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 161 [2023-08-04 00:40:14,770 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:40:14,770 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:40:14,770 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:40:14,770 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:40:14,778 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,786 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,786 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,799 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,803 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,805 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,807 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,810 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:40:14,811 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:40:14,811 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:40:14,811 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:40:14,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (1/1) ... [2023-08-04 00:40:14,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:40:14,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:40:15,061 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:40:15,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:40:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:40:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:40:15,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:40:15,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:40:15,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:40:15,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:40:15,102 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:40:15,103 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:40:15,103 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:40:15,103 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:40:15,103 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:40:15,104 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:40:15,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:40:15,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:40:15,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:40:15,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:40:15,106 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:40:15,265 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:40:15,267 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:40:15,625 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:40:15,861 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:40:15,862 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:40:15,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:40:15 BoogieIcfgContainer [2023-08-04 00:40:15,864 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:40:15,868 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:40:15,868 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:40:15,871 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:40:15,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:40:14" (1/3) ... [2023-08-04 00:40:15,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c64c31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:40:15, skipping insertion in model container [2023-08-04 00:40:15,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:40:14" (2/3) ... [2023-08-04 00:40:15,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c64c31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:40:15, skipping insertion in model container [2023-08-04 00:40:15,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:40:15" (3/3) ... [2023-08-04 00:40:15,875 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe018_power.oepc_bound2.i [2023-08-04 00:40:15,882 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:40:15,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:40:15,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:40:15,891 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:40:15,958 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:40:15,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 144 transitions, 303 flow [2023-08-04 00:40:16,118 INFO L124 PetriNetUnfolderBase]: 30/461 cut-off events. [2023-08-04 00:40:16,118 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:40:16,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 30/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1917 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 282. Up to 16 conditions per place. [2023-08-04 00:40:16,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 144 transitions, 303 flow [2023-08-04 00:40:16,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 115 transitions, 245 flow [2023-08-04 00:40:16,139 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:40:16,147 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 115 transitions, 245 flow [2023-08-04 00:40:16,151 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 115 transitions, 245 flow [2023-08-04 00:40:16,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 115 transitions, 245 flow [2023-08-04 00:40:16,199 INFO L124 PetriNetUnfolderBase]: 6/229 cut-off events. [2023-08-04 00:40:16,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:40:16,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 229 events. 6/229 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 593 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 166. Up to 8 conditions per place. [2023-08-04 00:40:16,203 INFO L119 LiptonReduction]: Number of co-enabled transitions 1084 [2023-08-04 00:40:22,157 INFO L134 LiptonReduction]: Checked pairs total: 2396 [2023-08-04 00:40:22,158 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 00:40:22,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:40:22,173 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;@40a8c42c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:40:22,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:40:22,178 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:40:22,179 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 00:40:22,179 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:40:22,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:40:22,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:40:22,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:40:22,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:40:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash 895404948, now seen corresponding path program 1 times [2023-08-04 00:40:22,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:40:22,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071097761] [2023-08-04 00:40:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:22,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:40:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:40:22,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:40:22,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071097761] [2023-08-04 00:40:22,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071097761] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:40:22,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:40:22,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:40:22,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556655339] [2023-08-04 00:40:22,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:40:22,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:40:22,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:40:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:40:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:40:22,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 241 [2023-08-04 00:40:22,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:22,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:40:22,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 241 [2023-08-04 00:40:22,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:40:22,571 INFO L124 PetriNetUnfolderBase]: 200/386 cut-off events. [2023-08-04 00:40:22,571 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 00:40:22,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 386 events. 200/386 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1657 event pairs, 102 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 771. Up to 348 conditions per place. [2023-08-04 00:40:22,575 INFO L140 encePairwiseOnDemand]: 238/241 looper letters, 19 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-04 00:40:22,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 109 flow [2023-08-04 00:40:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:40:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:40:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-04 00:40:22,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5573997233748271 [2023-08-04 00:40:22,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-04 00:40:22,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-04 00:40:22,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:40:22,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-04 00:40:22,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-04 00:40:22,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:22,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:22,603 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 61 flow. Second operand 3 states and 403 transitions. [2023-08-04 00:40:22,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 109 flow [2023-08-04 00:40:22,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:40:22,607 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 69 flow [2023-08-04 00:40:22,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-04 00:40:22,611 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 00:40:22,611 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 69 flow [2023-08-04 00:40:22,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:22,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:40:22,612 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:40:22,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:40:22,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:40:22,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:40:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash 905849005, now seen corresponding path program 1 times [2023-08-04 00:40:22,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:40:22,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402179064] [2023-08-04 00:40:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:22,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:40:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:40:22,636 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:40:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:40:22,670 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:40:22,670 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:40:22,671 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:40:22,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:40:22,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:40:22,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:40:22,674 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 00:40:22,675 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:40:22,676 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:40:22,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:40:22,711 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:40:22,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 165 transitions, 366 flow [2023-08-04 00:40:22,865 INFO L124 PetriNetUnfolderBase]: 93/1380 cut-off events. [2023-08-04 00:40:22,866 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:40:22,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 1380 events. 93/1380 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9283 event pairs, 0 based on Foata normal form. 0/1221 useless extension candidates. Maximal degree in co-relation 1003. Up to 54 conditions per place. [2023-08-04 00:40:22,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 165 transitions, 366 flow [2023-08-04 00:40:22,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 136 transitions, 308 flow [2023-08-04 00:40:22,875 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:40:22,875 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 136 transitions, 308 flow [2023-08-04 00:40:22,875 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 136 transitions, 308 flow [2023-08-04 00:40:22,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 136 transitions, 308 flow [2023-08-04 00:40:22,937 INFO L124 PetriNetUnfolderBase]: 12/597 cut-off events. [2023-08-04 00:40:22,937 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:40:22,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 597 events. 12/597 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2884 event pairs, 0 based on Foata normal form. 0/573 useless extension candidates. Maximal degree in co-relation 481. Up to 27 conditions per place. [2023-08-04 00:40:22,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2023-08-04 00:40:29,866 INFO L134 LiptonReduction]: Checked pairs total: 8168 [2023-08-04 00:40:29,866 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-04 00:40:29,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:40:29,869 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;@40a8c42c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:40:29,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:40:29,876 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:40:29,877 INFO L124 PetriNetUnfolderBase]: 0/55 cut-off events. [2023-08-04 00:40:29,877 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 00:40:29,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:40:29,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:40:29,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:40:29,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:40:29,878 INFO L85 PathProgramCache]: Analyzing trace with hash -708565786, now seen corresponding path program 1 times [2023-08-04 00:40:29,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:40:29,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533090347] [2023-08-04 00:40:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:29,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:40:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:40:29,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:40:29,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533090347] [2023-08-04 00:40:29,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533090347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:40:29,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:40:29,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:40:29,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825270096] [2023-08-04 00:40:29,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:40:29,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:40:29,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:40:29,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:40:29,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:40:29,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 268 [2023-08-04 00:40:29,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:29,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:40:29,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 268 [2023-08-04 00:40:29,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:40:35,169 INFO L124 PetriNetUnfolderBase]: 21408/29620 cut-off events. [2023-08-04 00:40:35,169 INFO L125 PetriNetUnfolderBase]: For 2238/2238 co-relation queries the response was YES. [2023-08-04 00:40:35,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60835 conditions, 29620 events. 21408/29620 cut-off events. For 2238/2238 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 179982 event pairs, 16818 based on Foata normal form. 0/29014 useless extension candidates. Maximal degree in co-relation 17212. Up to 28294 conditions per place. [2023-08-04 00:40:35,354 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 30 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 00:40:35,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 184 flow [2023-08-04 00:40:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:40:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:40:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-04 00:40:35,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746268656716418 [2023-08-04 00:40:35,357 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-04 00:40:35,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-04 00:40:35,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:40:35,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-04 00:40:35,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:35,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:35,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:35,362 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 112 flow. Second operand 3 states and 462 transitions. [2023-08-04 00:40:35,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 184 flow [2023-08-04 00:40:35,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 178 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:40:35,369 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 118 flow [2023-08-04 00:40:35,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-04 00:40:35,370 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 00:40:35,370 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 118 flow [2023-08-04 00:40:35,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:35,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:40:35,371 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:40:35,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:40:35,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:40:35,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:40:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash 145133446, now seen corresponding path program 1 times [2023-08-04 00:40:35,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:40:35,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426634969] [2023-08-04 00:40:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:35,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:40:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:40:35,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:40:35,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426634969] [2023-08-04 00:40:35,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426634969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:40:35,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987905165] [2023-08-04 00:40:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:35,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:35,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:40:35,485 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:40:35,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:40:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:35,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:40:35,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:40:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:40:35,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:40:35,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987905165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:40:35,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:40:35,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:40:35,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136231652] [2023-08-04 00:40:35,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:40:35,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:40:35,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:40:35,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:40:35,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:40:35,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 268 [2023-08-04 00:40:35,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:35,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:40:35,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 268 [2023-08-04 00:40:35,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:40:40,043 INFO L124 PetriNetUnfolderBase]: 21396/29581 cut-off events. [2023-08-04 00:40:40,043 INFO L125 PetriNetUnfolderBase]: For 1947/1947 co-relation queries the response was YES. [2023-08-04 00:40:40,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60511 conditions, 29581 events. 21396/29581 cut-off events. For 1947/1947 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 179560 event pairs, 13380 based on Foata normal form. 9/29002 useless extension candidates. Maximal degree in co-relation 21687. Up to 28247 conditions per place. [2023-08-04 00:40:40,294 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 33 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-04 00:40:40,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 206 flow [2023-08-04 00:40:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:40:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:40:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 748 transitions. [2023-08-04 00:40:40,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582089552238806 [2023-08-04 00:40:40,297 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 748 transitions. [2023-08-04 00:40:40,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 748 transitions. [2023-08-04 00:40:40,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:40:40,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 748 transitions. [2023-08-04 00:40:40,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.6) internal successors, (748), 5 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:40,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:40,303 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:40,303 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 118 flow. Second operand 5 states and 748 transitions. [2023-08-04 00:40:40,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 206 flow [2023-08-04 00:40:40,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 46 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:40:40,306 INFO L231 Difference]: Finished difference. Result has 57 places, 39 transitions, 132 flow [2023-08-04 00:40:40,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=57, PETRI_TRANSITIONS=39} [2023-08-04 00:40:40,308 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-04 00:40:40,308 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 39 transitions, 132 flow [2023-08-04 00:40:40,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:40,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:40:40,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:40:40,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:40:40,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:40,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:40:40,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:40:40,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2015702989, now seen corresponding path program 1 times [2023-08-04 00:40:40,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:40:40,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232811941] [2023-08-04 00:40:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:40,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:40:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:40:40,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:40:40,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232811941] [2023-08-04 00:40:40,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232811941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:40:40,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319700949] [2023-08-04 00:40:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:40,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:40,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:40:40,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:40:40,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:40:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:40,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:40:40,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:40:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:40:40,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:40:40,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319700949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:40:40,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:40:40,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:40:40,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276940362] [2023-08-04 00:40:40,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:40:40,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:40:40,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:40:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:40:40,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:40:40,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 268 [2023-08-04 00:40:40,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:40,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:40:40,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 268 [2023-08-04 00:40:40,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:40:44,936 INFO L124 PetriNetUnfolderBase]: 20354/28856 cut-off events. [2023-08-04 00:40:44,936 INFO L125 PetriNetUnfolderBase]: For 1798/1798 co-relation queries the response was YES. [2023-08-04 00:40:44,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58303 conditions, 28856 events. 20354/28856 cut-off events. For 1798/1798 co-relation queries the response was YES. Maximal size of possible extension queue 1075. Compared 183105 event pairs, 16084 based on Foata normal form. 0/28304 useless extension candidates. Maximal degree in co-relation 16588. Up to 26614 conditions per place. [2023-08-04 00:40:45,097 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 35 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-08-04 00:40:45,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 224 flow [2023-08-04 00:40:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:40:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:40:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-04 00:40:45,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5796019900497512 [2023-08-04 00:40:45,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-04 00:40:45,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-04 00:40:45,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:40:45,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-04 00:40:45,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:45,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:45,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:45,104 INFO L175 Difference]: Start difference. First operand has 57 places, 39 transitions, 132 flow. Second operand 3 states and 466 transitions. [2023-08-04 00:40:45,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 224 flow [2023-08-04 00:40:45,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 217 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:40:45,107 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 140 flow [2023-08-04 00:40:45,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-08-04 00:40:45,109 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 00:40:45,109 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 140 flow [2023-08-04 00:40:45,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:45,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:40:45,109 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:40:45,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 00:40:45,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:45,315 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:40:45,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:40:45,315 INFO L85 PathProgramCache]: Analyzing trace with hash 268361843, now seen corresponding path program 1 times [2023-08-04 00:40:45,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:40:45,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702673117] [2023-08-04 00:40:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:45,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:40:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:40:45,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:40:45,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702673117] [2023-08-04 00:40:45,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702673117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:40:45,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104706870] [2023-08-04 00:40:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:45,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:45,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:40:45,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:40:45,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:40:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:45,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:40:45,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:40:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:40:45,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:40:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:40:45,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104706870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:40:45,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:40:45,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:40:45,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617075337] [2023-08-04 00:40:45,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:40:45,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:40:45,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:40:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:40:45,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:40:45,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 268 [2023-08-04 00:40:45,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:45,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:40:45,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 268 [2023-08-04 00:40:45,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:40:49,087 INFO L124 PetriNetUnfolderBase]: 16066/22448 cut-off events. [2023-08-04 00:40:49,088 INFO L125 PetriNetUnfolderBase]: For 1557/1557 co-relation queries the response was YES. [2023-08-04 00:40:49,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45597 conditions, 22448 events. 16066/22448 cut-off events. For 1557/1557 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 135044 event pairs, 9684 based on Foata normal form. 3/22145 useless extension candidates. Maximal degree in co-relation 16240. Up to 20836 conditions per place. [2023-08-04 00:40:49,193 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 34 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-04 00:40:49,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 46 transitions, 221 flow [2023-08-04 00:40:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:40:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:40:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 605 transitions. [2023-08-04 00:40:49,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643656716417911 [2023-08-04 00:40:49,196 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 605 transitions. [2023-08-04 00:40:49,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 605 transitions. [2023-08-04 00:40:49,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:40:49,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 605 transitions. [2023-08-04 00:40:49,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:49,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:49,200 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:49,200 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 140 flow. Second operand 4 states and 605 transitions. [2023-08-04 00:40:49,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 46 transitions, 221 flow [2023-08-04 00:40:49,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 46 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:40:49,202 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 135 flow [2023-08-04 00:40:49,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-04 00:40:49,203 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-04 00:40:49,203 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 135 flow [2023-08-04 00:40:49,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:49,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:40:49,204 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:40:49,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:40:49,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:49,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:40:49,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:40:49,410 INFO L85 PathProgramCache]: Analyzing trace with hash -297343073, now seen corresponding path program 1 times [2023-08-04 00:40:49,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:40:49,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978419059] [2023-08-04 00:40:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:49,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:40:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:40:49,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:40:49,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978419059] [2023-08-04 00:40:49,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978419059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:40:49,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129943384] [2023-08-04 00:40:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:49,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:49,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:40:49,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:40:49,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:40:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:49,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:40:49,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:40:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:40:49,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:40:49,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129943384] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:40:49,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:40:49,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:40:49,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149383917] [2023-08-04 00:40:49,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:40:49,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:40:49,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:40:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:40:49,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:40:49,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 268 [2023-08-04 00:40:49,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:49,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:40:49,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 268 [2023-08-04 00:40:49,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:40:52,854 INFO L124 PetriNetUnfolderBase]: 15850/22237 cut-off events. [2023-08-04 00:40:52,854 INFO L125 PetriNetUnfolderBase]: For 1330/1330 co-relation queries the response was YES. [2023-08-04 00:40:52,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45048 conditions, 22237 events. 15850/22237 cut-off events. For 1330/1330 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 134548 event pairs, 4234 based on Foata normal form. 81/22093 useless extension candidates. Maximal degree in co-relation 16037. Up to 20007 conditions per place. [2023-08-04 00:40:52,999 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 46 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-08-04 00:40:52,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 273 flow [2023-08-04 00:40:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:40:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:40:53,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 760 transitions. [2023-08-04 00:40:53,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5671641791044776 [2023-08-04 00:40:53,002 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 760 transitions. [2023-08-04 00:40:53,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 760 transitions. [2023-08-04 00:40:53,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:40:53,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 760 transitions. [2023-08-04 00:40:53,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:53,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:53,012 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:53,012 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 135 flow. Second operand 5 states and 760 transitions. [2023-08-04 00:40:53,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 273 flow [2023-08-04 00:40:53,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 266 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:40:53,016 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 145 flow [2023-08-04 00:40:53,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2023-08-04 00:40:53,018 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-08-04 00:40:53,018 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 145 flow [2023-08-04 00:40:53,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:53,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:40:53,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:40:53,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:40:53,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:53,225 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:40:53,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:40:53,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1218068450, now seen corresponding path program 1 times [2023-08-04 00:40:53,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:40:53,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854006256] [2023-08-04 00:40:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:53,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:40:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:40:53,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:40:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854006256] [2023-08-04 00:40:53,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854006256] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:40:53,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036806087] [2023-08-04 00:40:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:53,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:53,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:40:53,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:40:53,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:40:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:53,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:40:53,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:40:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:40:53,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:40:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:40:53,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036806087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:40:53,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:40:53,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:40:53,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232691344] [2023-08-04 00:40:53,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:40:53,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:40:53,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:40:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:40:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:40:53,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 268 [2023-08-04 00:40:53,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:53,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:40:53,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 268 [2023-08-04 00:40:53,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:40:55,841 INFO L124 PetriNetUnfolderBase]: 12583/17458 cut-off events. [2023-08-04 00:40:55,841 INFO L125 PetriNetUnfolderBase]: For 1567/1567 co-relation queries the response was YES. [2023-08-04 00:40:55,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35712 conditions, 17458 events. 12583/17458 cut-off events. For 1567/1567 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 99982 event pairs, 7717 based on Foata normal form. 27/17314 useless extension candidates. Maximal degree in co-relation 12680. Up to 15685 conditions per place. [2023-08-04 00:40:55,945 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 42 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-04 00:40:55,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 259 flow [2023-08-04 00:40:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:40:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:40:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 613 transitions. [2023-08-04 00:40:55,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718283582089553 [2023-08-04 00:40:55,948 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 613 transitions. [2023-08-04 00:40:55,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 613 transitions. [2023-08-04 00:40:55,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:40:55,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 613 transitions. [2023-08-04 00:40:55,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:55,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:55,952 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:55,952 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 145 flow. Second operand 4 states and 613 transitions. [2023-08-04 00:40:55,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 259 flow [2023-08-04 00:40:55,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 254 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:40:55,954 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 138 flow [2023-08-04 00:40:55,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2023-08-04 00:40:55,954 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 00:40:55,955 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 138 flow [2023-08-04 00:40:55,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:55,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:40:55,955 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:40:55,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 00:40:56,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:40:56,164 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:40:56,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:40:56,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1867680030, now seen corresponding path program 1 times [2023-08-04 00:40:56,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:40:56,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652365912] [2023-08-04 00:40:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:40:56,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:40:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:40:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:40:56,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:40:56,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652365912] [2023-08-04 00:40:56,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652365912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:40:56,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:40:56,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:40:56,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302140359] [2023-08-04 00:40:56,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:40:56,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:40:56,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:40:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:40:56,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:40:56,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 268 [2023-08-04 00:40:56,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:56,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:40:56,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 268 [2023-08-04 00:40:56,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:40:57,695 INFO L124 PetriNetUnfolderBase]: 7183/10357 cut-off events. [2023-08-04 00:40:57,696 INFO L125 PetriNetUnfolderBase]: For 1279/1279 co-relation queries the response was YES. [2023-08-04 00:40:57,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21699 conditions, 10357 events. 7183/10357 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 58117 event pairs, 568 based on Foata normal form. 1296/11644 useless extension candidates. Maximal degree in co-relation 8618. Up to 7155 conditions per place. [2023-08-04 00:40:57,749 INFO L140 encePairwiseOnDemand]: 266/268 looper letters, 0 selfloop transitions, 0 changer transitions 56/56 dead transitions. [2023-08-04 00:40:57,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 270 flow [2023-08-04 00:40:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:40:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:40:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 620 transitions. [2023-08-04 00:40:57,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783582089552238 [2023-08-04 00:40:57,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 620 transitions. [2023-08-04 00:40:57,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 620 transitions. [2023-08-04 00:40:57,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:40:57,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 620 transitions. [2023-08-04 00:40:57,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:57,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:57,758 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:57,758 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 138 flow. Second operand 4 states and 620 transitions. [2023-08-04 00:40:57,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 270 flow [2023-08-04 00:40:57,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 263 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:40:57,798 INFO L231 Difference]: Finished difference. Result has 60 places, 0 transitions, 0 flow [2023-08-04 00:40:57,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=60, PETRI_TRANSITIONS=0} [2023-08-04 00:40:57,800 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-04 00:40:57,801 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 0 transitions, 0 flow [2023-08-04 00:40:57,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:40:57,801 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:40:57,801 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:40:57,801 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:40:57,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 00:40:57,802 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:40:57,804 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:40:57,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 165 transitions, 366 flow [2023-08-04 00:40:57,958 INFO L124 PetriNetUnfolderBase]: 93/1380 cut-off events. [2023-08-04 00:40:57,958 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:40:57,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 1380 events. 93/1380 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9283 event pairs, 0 based on Foata normal form. 0/1221 useless extension candidates. Maximal degree in co-relation 1003. Up to 54 conditions per place. [2023-08-04 00:40:57,964 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 165 transitions, 366 flow [2023-08-04 00:40:57,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 150 transitions, 324 flow [2023-08-04 00:40:57,967 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:40:57,967 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 150 transitions, 324 flow [2023-08-04 00:40:57,967 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 150 transitions, 324 flow [2023-08-04 00:40:57,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 150 transitions, 324 flow [2023-08-04 00:40:58,075 INFO L124 PetriNetUnfolderBase]: 66/1043 cut-off events. [2023-08-04 00:40:58,076 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:40:58,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 1043 events. 66/1043 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6376 event pairs, 0 based on Foata normal form. 0/938 useless extension candidates. Maximal degree in co-relation 775. Up to 54 conditions per place. [2023-08-04 00:40:58,094 INFO L119 LiptonReduction]: Number of co-enabled transitions 4004 [2023-08-04 00:41:05,393 INFO L134 LiptonReduction]: Checked pairs total: 11880 [2023-08-04 00:41:05,393 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 00:41:05,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:41:05,395 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;@40a8c42c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:41:05,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:41:05,400 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:41:05,400 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-04 00:41:05,400 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 00:41:05,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:41:05,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:41:05,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:41:05,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:41:05,401 INFO L85 PathProgramCache]: Analyzing trace with hash -205563810, now seen corresponding path program 1 times [2023-08-04 00:41:05,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:41:05,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384596919] [2023-08-04 00:41:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:41:05,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:41:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:41:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:41:05,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:41:05,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384596919] [2023-08-04 00:41:05,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384596919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:41:05,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:41:05,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:41:05,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977889940] [2023-08-04 00:41:05,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:41:05,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:41:05,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:41:05,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:41:05,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:41:05,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 00:41:05,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:05,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:41:05,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 00:41:05,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:41:21,591 INFO L124 PetriNetUnfolderBase]: 90780/123409 cut-off events. [2023-08-04 00:41:21,592 INFO L125 PetriNetUnfolderBase]: For 1917/1917 co-relation queries the response was YES. [2023-08-04 00:41:21,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243070 conditions, 123409 events. 90780/123409 cut-off events. For 1917/1917 co-relation queries the response was YES. Maximal size of possible extension queue 3529. Compared 824892 event pairs, 73086 based on Foata normal form. 3276/119845 useless extension candidates. Maximal degree in co-relation 69221. Up to 117322 conditions per place. [2023-08-04 00:41:22,140 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 35 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2023-08-04 00:41:22,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 190 flow [2023-08-04 00:41:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:41:22,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:41:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-04 00:41:22,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5563463819691578 [2023-08-04 00:41:22,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-04 00:41:22,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-04 00:41:22,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:41:22,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-04 00:41:22,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:22,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:22,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:22,145 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 108 flow. Second operand 3 states and 469 transitions. [2023-08-04 00:41:22,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 190 flow [2023-08-04 00:41:22,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:41:22,146 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 116 flow [2023-08-04 00:41:22,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2023-08-04 00:41:22,147 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-04 00:41:22,147 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 116 flow [2023-08-04 00:41:22,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:22,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:41:22,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:41:22,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 00:41:22,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:41:22,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:41:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1298555218, now seen corresponding path program 1 times [2023-08-04 00:41:22,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:41:22,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586980468] [2023-08-04 00:41:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:41:22,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:41:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:41:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:41:22,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:41:22,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586980468] [2023-08-04 00:41:22,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586980468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:41:22,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524147943] [2023-08-04 00:41:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:41:22,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:41:22,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:41:22,202 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:41:22,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:41:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:41:22,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:41:22,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:41:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:41:22,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:41:22,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524147943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:41:22,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:41:22,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:41:22,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285508228] [2023-08-04 00:41:22,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:41:22,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:41:22,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:41:22,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:41:22,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:41:22,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 00:41:22,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:22,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:41:22,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 00:41:22,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:41:35,845 INFO L124 PetriNetUnfolderBase]: 75086/101969 cut-off events. [2023-08-04 00:41:35,846 INFO L125 PetriNetUnfolderBase]: For 1647/1647 co-relation queries the response was YES. [2023-08-04 00:41:36,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200770 conditions, 101969 events. 75086/101969 cut-off events. For 1647/1647 co-relation queries the response was YES. Maximal size of possible extension queue 3043. Compared 664579 event pairs, 60736 based on Foata normal form. 0/98609 useless extension candidates. Maximal degree in co-relation 200733. Up to 96475 conditions per place. [2023-08-04 00:41:36,366 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 40 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 00:41:36,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 216 flow [2023-08-04 00:41:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:41:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:41:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 00:41:36,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587188612099644 [2023-08-04 00:41:36,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 00:41:36,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 00:41:36,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:41:36,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 00:41:36,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:36,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:36,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:36,371 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 116 flow. Second operand 3 states and 471 transitions. [2023-08-04 00:41:36,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 216 flow [2023-08-04 00:41:36,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 49 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:41:36,373 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 126 flow [2023-08-04 00:41:36,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2023-08-04 00:41:36,373 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-08-04 00:41:36,373 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 126 flow [2023-08-04 00:41:36,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:36,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:41:36,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:41:36,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 00:41:36,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:41:36,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:41:36,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:41:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash -904376490, now seen corresponding path program 1 times [2023-08-04 00:41:36,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:41:36,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564680405] [2023-08-04 00:41:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:41:36,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:41:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:41:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:41:36,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:41:36,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564680405] [2023-08-04 00:41:36,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564680405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:41:36,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448577179] [2023-08-04 00:41:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:41:36,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:41:36,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:41:36,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:41:36,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:41:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:41:36,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:41:36,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:41:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:41:36,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:41:36,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448577179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:41:36,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:41:36,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:41:36,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430200336] [2023-08-04 00:41:36,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:41:36,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:41:36,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:41:36,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:41:36,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:41:36,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 00:41:36,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:36,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:41:36,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 00:41:36,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:41:49,774 INFO L124 PetriNetUnfolderBase]: 73742/98498 cut-off events. [2023-08-04 00:41:49,774 INFO L125 PetriNetUnfolderBase]: For 977/977 co-relation queries the response was YES. [2023-08-04 00:41:50,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195713 conditions, 98498 events. 73742/98498 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 3008. Compared 624421 event pairs, 57038 based on Foata normal form. 0/95027 useless extension candidates. Maximal degree in co-relation 55924. Up to 91805 conditions per place. [2023-08-04 00:41:50,314 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 46 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 00:41:50,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 248 flow [2023-08-04 00:41:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:41:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:41:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-04 00:41:50,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564650059311981 [2023-08-04 00:41:50,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-04 00:41:50,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-04 00:41:50,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:41:50,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-04 00:41:50,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:50,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:50,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:50,319 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 126 flow. Second operand 3 states and 476 transitions. [2023-08-04 00:41:50,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 248 flow [2023-08-04 00:41:50,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:41:50,321 INFO L231 Difference]: Finished difference. Result has 60 places, 43 transitions, 136 flow [2023-08-04 00:41:50,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=60, PETRI_TRANSITIONS=43} [2023-08-04 00:41:50,322 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2023-08-04 00:41:50,322 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 43 transitions, 136 flow [2023-08-04 00:41:50,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:50,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:41:50,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:41:50,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 00:41:50,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:41:50,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:41:50,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:41:50,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1222468847, now seen corresponding path program 1 times [2023-08-04 00:41:50,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:41:50,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877302388] [2023-08-04 00:41:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:41:50,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:41:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:41:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:41:50,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:41:50,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877302388] [2023-08-04 00:41:50,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877302388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:41:50,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172815552] [2023-08-04 00:41:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:41:50,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:41:50,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:41:50,598 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:41:50,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 00:41:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:41:50,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:41:50,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:41:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:41:50,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:41:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:41:50,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172815552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:41:50,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:41:50,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:41:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446329911] [2023-08-04 00:41:50,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:41:50,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:41:50,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:41:50,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:41:50,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:41:50,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-04 00:41:50,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 43 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:41:50,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:41:50,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-04 00:41:50,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:42:01,107 INFO L124 PetriNetUnfolderBase]: 57928/76580 cut-off events. [2023-08-04 00:42:01,108 INFO L125 PetriNetUnfolderBase]: For 5757/5757 co-relation queries the response was YES. [2023-08-04 00:42:01,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156965 conditions, 76580 events. 57928/76580 cut-off events. For 5757/5757 co-relation queries the response was YES. Maximal size of possible extension queue 2443. Compared 458197 event pairs, 36996 based on Foata normal form. 3/76115 useless extension candidates. Maximal degree in co-relation 55791. Up to 73594 conditions per place. [2023-08-04 00:42:01,732 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 40 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2023-08-04 00:42:01,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 240 flow [2023-08-04 00:42:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:42:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:42:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-04 00:42:01,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435943060498221 [2023-08-04 00:42:01,734 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-04 00:42:01,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-04 00:42:01,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:42:01,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-04 00:42:01,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:01,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:01,738 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:01,738 INFO L175 Difference]: Start difference. First operand has 60 places, 43 transitions, 136 flow. Second operand 4 states and 611 transitions. [2023-08-04 00:42:01,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 240 flow [2023-08-04 00:42:01,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 51 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:42:01,742 INFO L231 Difference]: Finished difference. Result has 64 places, 43 transitions, 148 flow [2023-08-04 00:42:01,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2023-08-04 00:42:01,743 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2023-08-04 00:42:01,743 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 148 flow [2023-08-04 00:42:01,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:01,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:42:01,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:42:01,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 00:42:01,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 00:42:01,949 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:42:01,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:42:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1945521146, now seen corresponding path program 1 times [2023-08-04 00:42:01,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:42:01,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461424190] [2023-08-04 00:42:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:01,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:42:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:42:02,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:42:02,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461424190] [2023-08-04 00:42:02,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461424190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:42:02,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942722859] [2023-08-04 00:42:02,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:02,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:42:02,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:42:02,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:42:02,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 00:42:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:02,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:42:02,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:42:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:42:02,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:42:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:42:02,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942722859] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:42:02,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:42:02,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:42:02,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458090728] [2023-08-04 00:42:02,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:42:02,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:42:02,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:42:02,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:42:02,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:42:02,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-04 00:42:02,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:02,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:42:02,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-04 00:42:02,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:42:10,132 INFO L124 PetriNetUnfolderBase]: 45550/59659 cut-off events. [2023-08-04 00:42:10,133 INFO L125 PetriNetUnfolderBase]: For 3978/3978 co-relation queries the response was YES. [2023-08-04 00:42:10,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121916 conditions, 59659 events. 45550/59659 cut-off events. For 3978/3978 co-relation queries the response was YES. Maximal size of possible extension queue 2100. Compared 339334 event pairs, 29614 based on Foata normal form. 27/59353 useless extension candidates. Maximal degree in co-relation 43250. Up to 56617 conditions per place. [2023-08-04 00:42:10,461 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 48 selfloop transitions, 3 changer transitions 1/59 dead transitions. [2023-08-04 00:42:10,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 284 flow [2023-08-04 00:42:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:42:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:42:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2023-08-04 00:42:10,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550711743772242 [2023-08-04 00:42:10,463 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2023-08-04 00:42:10,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2023-08-04 00:42:10,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:42:10,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2023-08-04 00:42:10,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:10,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:10,466 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:10,466 INFO L175 Difference]: Start difference. First operand has 64 places, 43 transitions, 148 flow. Second operand 4 states and 619 transitions. [2023-08-04 00:42:10,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 284 flow [2023-08-04 00:42:10,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 277 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:42:10,471 INFO L231 Difference]: Finished difference. Result has 66 places, 43 transitions, 155 flow [2023-08-04 00:42:10,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=66, PETRI_TRANSITIONS=43} [2023-08-04 00:42:10,471 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2023-08-04 00:42:10,471 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 43 transitions, 155 flow [2023-08-04 00:42:10,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:10,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:42:10,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:42:10,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 00:42:10,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:42:10,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:42:10,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:42:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1407287529, now seen corresponding path program 1 times [2023-08-04 00:42:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:42:10,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088600162] [2023-08-04 00:42:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:10,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:42:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:42:10,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:42:10,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088600162] [2023-08-04 00:42:10,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088600162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:42:10,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309266992] [2023-08-04 00:42:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:10,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:42:10,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:42:10,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:42:10,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 00:42:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:10,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:42:10,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:42:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:42:10,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:42:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:42:10,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309266992] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:42:10,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:42:10,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:42:10,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598521901] [2023-08-04 00:42:10,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:42:10,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:42:10,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:42:10,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:42:10,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:42:10,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-04 00:42:10,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 43 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:10,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:42:10,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-04 00:42:10,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:42:17,921 INFO L124 PetriNetUnfolderBase]: 40906/52585 cut-off events. [2023-08-04 00:42:17,921 INFO L125 PetriNetUnfolderBase]: For 3106/3106 co-relation queries the response was YES. [2023-08-04 00:42:18,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108802 conditions, 52585 events. 40906/52585 cut-off events. For 3106/3106 co-relation queries the response was YES. Maximal size of possible extension queue 1914. Compared 283842 event pairs, 18820 based on Foata normal form. 324/52900 useless extension candidates. Maximal degree in co-relation 38573. Up to 34339 conditions per place. [2023-08-04 00:42:18,208 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 59 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 00:42:18,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 70 transitions, 335 flow [2023-08-04 00:42:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:42:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:42:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2023-08-04 00:42:18,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604982206405694 [2023-08-04 00:42:18,210 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2023-08-04 00:42:18,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2023-08-04 00:42:18,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:42:18,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2023-08-04 00:42:18,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:18,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:18,213 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:18,213 INFO L175 Difference]: Start difference. First operand has 66 places, 43 transitions, 155 flow. Second operand 4 states and 630 transitions. [2023-08-04 00:42:18,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 70 transitions, 335 flow [2023-08-04 00:42:18,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 328 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:42:18,217 INFO L231 Difference]: Finished difference. Result has 68 places, 43 transitions, 162 flow [2023-08-04 00:42:18,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=68, PETRI_TRANSITIONS=43} [2023-08-04 00:42:18,218 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-04 00:42:18,218 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 43 transitions, 162 flow [2023-08-04 00:42:18,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:18,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:42:18,218 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:42:18,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 00:42:18,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 00:42:18,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:42:18,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:42:18,424 INFO L85 PathProgramCache]: Analyzing trace with hash 602474085, now seen corresponding path program 1 times [2023-08-04 00:42:18,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:42:18,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499452665] [2023-08-04 00:42:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:18,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:42:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:42:18,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:42:18,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499452665] [2023-08-04 00:42:18,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499452665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:42:18,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:42:18,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:42:18,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998862646] [2023-08-04 00:42:18,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:42:18,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:42:18,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:42:18,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:42:18,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:42:18,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 00:42:18,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 43 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:18,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:42:18,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 00:42:18,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:42:25,803 INFO L124 PetriNetUnfolderBase]: 38935/51667 cut-off events. [2023-08-04 00:42:25,803 INFO L125 PetriNetUnfolderBase]: For 15478/15478 co-relation queries the response was YES. [2023-08-04 00:42:25,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110359 conditions, 51667 events. 38935/51667 cut-off events. For 15478/15478 co-relation queries the response was YES. Maximal size of possible extension queue 1954. Compared 301892 event pairs, 8020 based on Foata normal form. 1296/52954 useless extension candidates. Maximal degree in co-relation 39056. Up to 40258 conditions per place. [2023-08-04 00:42:26,065 INFO L140 encePairwiseOnDemand]: 276/281 looper letters, 49 selfloop transitions, 3 changer transitions 25/84 dead transitions. [2023-08-04 00:42:26,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 420 flow [2023-08-04 00:42:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:42:26,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:42:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 790 transitions. [2023-08-04 00:42:26,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622775800711743 [2023-08-04 00:42:26,067 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 790 transitions. [2023-08-04 00:42:26,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 790 transitions. [2023-08-04 00:42:26,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:42:26,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 790 transitions. [2023-08-04 00:42:26,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:26,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:26,071 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:26,071 INFO L175 Difference]: Start difference. First operand has 68 places, 43 transitions, 162 flow. Second operand 5 states and 790 transitions. [2023-08-04 00:42:26,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 420 flow [2023-08-04 00:42:26,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 408 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:42:26,091 INFO L231 Difference]: Finished difference. Result has 72 places, 45 transitions, 182 flow [2023-08-04 00:42:26,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=72, PETRI_TRANSITIONS=45} [2023-08-04 00:42:26,091 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2023-08-04 00:42:26,091 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 45 transitions, 182 flow [2023-08-04 00:42:26,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:26,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:42:26,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:42:26,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 00:42:26,092 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:42:26,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:42:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1496810660, now seen corresponding path program 1 times [2023-08-04 00:42:26,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:42:26,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543276697] [2023-08-04 00:42:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:26,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:42:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:42:26,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:42:26,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543276697] [2023-08-04 00:42:26,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543276697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:42:26,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:42:26,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 00:42:26,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643134124] [2023-08-04 00:42:26,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:42:26,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:42:26,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:42:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:42:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:42:26,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 281 [2023-08-04 00:42:26,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 45 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:26,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:42:26,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 281 [2023-08-04 00:42:26,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:42:37,251 INFO L124 PetriNetUnfolderBase]: 58888/76669 cut-off events. [2023-08-04 00:42:37,251 INFO L125 PetriNetUnfolderBase]: For 34648/34648 co-relation queries the response was YES. [2023-08-04 00:42:37,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178726 conditions, 76669 events. 58888/76669 cut-off events. For 34648/34648 co-relation queries the response was YES. Maximal size of possible extension queue 2885. Compared 448901 event pairs, 12265 based on Foata normal form. 1863/78451 useless extension candidates. Maximal degree in co-relation 164779. Up to 36919 conditions per place. [2023-08-04 00:42:37,876 INFO L140 encePairwiseOnDemand]: 274/281 looper letters, 75 selfloop transitions, 7 changer transitions 42/131 dead transitions. [2023-08-04 00:42:37,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 131 transitions, 701 flow [2023-08-04 00:42:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 00:42:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 00:42:37,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1097 transitions. [2023-08-04 00:42:37,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5577020843924758 [2023-08-04 00:42:37,878 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1097 transitions. [2023-08-04 00:42:37,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1097 transitions. [2023-08-04 00:42:37,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:42:37,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1097 transitions. [2023-08-04 00:42:37,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 156.71428571428572) internal successors, (1097), 7 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:37,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:37,883 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:37,883 INFO L175 Difference]: Start difference. First operand has 72 places, 45 transitions, 182 flow. Second operand 7 states and 1097 transitions. [2023-08-04 00:42:37,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 131 transitions, 701 flow [2023-08-04 00:42:38,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 131 transitions, 694 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:42:38,278 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 254 flow [2023-08-04 00:42:38,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=254, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2023-08-04 00:42:38,279 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2023-08-04 00:42:38,279 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 254 flow [2023-08-04 00:42:38,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:38,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:42:38,280 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:42:38,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 00:42:38,280 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:42:38,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:42:38,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1194648514, now seen corresponding path program 1 times [2023-08-04 00:42:38,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:42:38,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005787238] [2023-08-04 00:42:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:38,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:42:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:42:38,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:42:38,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005787238] [2023-08-04 00:42:38,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005787238] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:42:38,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:42:38,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:42:38,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833675449] [2023-08-04 00:42:38,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:42:38,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:42:38,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:42:38,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:42:38,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:42:38,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 281 [2023-08-04 00:42:38,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:38,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:42:38,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 281 [2023-08-04 00:42:38,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:42:49,312 INFO L124 PetriNetUnfolderBase]: 54258/72838 cut-off events. [2023-08-04 00:42:49,312 INFO L125 PetriNetUnfolderBase]: For 95817/95817 co-relation queries the response was YES. [2023-08-04 00:42:49,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198770 conditions, 72838 events. 54258/72838 cut-off events. For 95817/95817 co-relation queries the response was YES. Maximal size of possible extension queue 2783. Compared 464408 event pairs, 19554 based on Foata normal form. 1080/73875 useless extension candidates. Maximal degree in co-relation 198686. Up to 59961 conditions per place. [2023-08-04 00:42:49,843 INFO L140 encePairwiseOnDemand]: 276/281 looper letters, 79 selfloop transitions, 3 changer transitions 27/116 dead transitions. [2023-08-04 00:42:49,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 783 flow [2023-08-04 00:42:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:42:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:42:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 819 transitions. [2023-08-04 00:42:49,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829181494661921 [2023-08-04 00:42:49,845 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 819 transitions. [2023-08-04 00:42:49,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 819 transitions. [2023-08-04 00:42:49,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:42:49,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 819 transitions. [2023-08-04 00:42:49,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:49,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:49,848 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:49,848 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 254 flow. Second operand 5 states and 819 transitions. [2023-08-04 00:42:49,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 783 flow [2023-08-04 00:42:50,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 746 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-04 00:42:50,129 INFO L231 Difference]: Finished difference. Result has 80 places, 53 transitions, 264 flow [2023-08-04 00:42:50,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=80, PETRI_TRANSITIONS=53} [2023-08-04 00:42:50,130 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 26 predicate places. [2023-08-04 00:42:50,130 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 53 transitions, 264 flow [2023-08-04 00:42:50,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:50,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:42:50,130 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:42:50,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 00:42:50,131 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:42:50,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:42:50,131 INFO L85 PathProgramCache]: Analyzing trace with hash 279376082, now seen corresponding path program 1 times [2023-08-04 00:42:50,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:42:50,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274916009] [2023-08-04 00:42:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:42:50,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:42:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:42:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:42:50,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:42:50,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274916009] [2023-08-04 00:42:50,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274916009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:42:50,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:42:50,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:42:50,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102955163] [2023-08-04 00:42:50,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:42:50,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:42:50,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:42:50,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:42:50,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:42:50,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 281 [2023-08-04 00:42:50,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 53 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:50,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:42:50,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 281 [2023-08-04 00:42:50,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:42:59,464 INFO L124 PetriNetUnfolderBase]: 47100/60226 cut-off events. [2023-08-04 00:42:59,465 INFO L125 PetriNetUnfolderBase]: For 86079/86079 co-relation queries the response was YES. [2023-08-04 00:42:59,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181324 conditions, 60226 events. 47100/60226 cut-off events. For 86079/86079 co-relation queries the response was YES. Maximal size of possible extension queue 2228. Compared 332565 event pairs, 10480 based on Foata normal form. 240/60306 useless extension candidates. Maximal degree in co-relation 166452. Up to 57161 conditions per place. [2023-08-04 00:42:59,867 INFO L140 encePairwiseOnDemand]: 273/281 looper letters, 79 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2023-08-04 00:42:59,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 93 transitions, 641 flow [2023-08-04 00:42:59,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:42:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:42:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-04 00:42:59,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705812574139977 [2023-08-04 00:42:59,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-04 00:42:59,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-04 00:42:59,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:42:59,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-04 00:42:59,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:59,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:59,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:42:59,871 INFO L175 Difference]: Start difference. First operand has 80 places, 53 transitions, 264 flow. Second operand 3 states and 481 transitions. [2023-08-04 00:42:59,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 93 transitions, 641 flow [2023-08-04 00:43:00,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 93 transitions, 634 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:43:00,050 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 306 flow [2023-08-04 00:43:00,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2023-08-04 00:43:00,050 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2023-08-04 00:43:00,050 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 306 flow [2023-08-04 00:43:00,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:00,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:43:00,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:43:00,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 00:43:00,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:43:00,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:43:00,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1594292904, now seen corresponding path program 1 times [2023-08-04 00:43:00,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:43:00,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869089781] [2023-08-04 00:43:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:43:00,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:43:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:43:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:43:01,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:43:01,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869089781] [2023-08-04 00:43:01,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869089781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:43:01,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162679449] [2023-08-04 00:43:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:43:01,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:43:01,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:43:01,662 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:43:01,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 00:43:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:43:01,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-04 00:43:01,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:43:02,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-04 00:43:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:43:02,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:43:02,886 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 00:43:02,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 133 [2023-08-04 00:43:05,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 284 [2023-08-04 00:43:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:43:05,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162679449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:43:05,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:43:05,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 6] total 17 [2023-08-04 00:43:05,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573773687] [2023-08-04 00:43:05,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:43:05,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 00:43:05,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:43:05,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 00:43:05,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-04 00:43:06,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 281 [2023-08-04 00:43:06,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 306 flow. Second operand has 18 states, 18 states have (on average 117.22222222222223) internal successors, (2110), 18 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:06,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:43:06,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 281 [2023-08-04 00:43:06,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand