/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe019_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:08:14,774 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:08:14,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:08:14,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:08:14,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:08:14,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:08:14,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:08:14,887 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:08:14,887 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:08:14,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:08:14,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:08:14,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:08:14,893 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:08:14,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:08:14,895 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:08:14,895 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:08:14,895 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:08:14,895 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:08:14,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:08:14,896 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:08:14,896 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:08:14,896 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:08:14,897 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:08:14,897 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:08:14,898 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:08:14,898 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:08:14,898 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:08:14,899 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:08:14,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:08:14,899 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:08:14,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:08:14,900 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:08:14,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:08:14,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:08:14,901 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:08:14,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:08:14,901 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:08:14,902 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:08:14,902 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:08:14,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:08:14,902 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:08:14,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:08:15,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:08:15,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:08:15,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:08:15,159 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:08:15,160 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:08:15,161 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe019_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:08:16,415 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:08:16,689 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:08:16,689 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe019_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:08:16,707 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f8cdfd99/6603e82b978841ecb818e8c82195278b/FLAG24646bbba [2023-08-04 07:08:16,724 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f8cdfd99/6603e82b978841ecb818e8c82195278b [2023-08-04 07:08:16,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:08:16,728 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:08:16,729 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:08:16,729 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:08:16,733 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:08:16,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:08:16" (1/1) ... [2023-08-04 07:08:16,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c47d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:16, skipping insertion in model container [2023-08-04 07:08:16,735 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:08:16" (1/1) ... [2023-08-04 07:08:16,787 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:08:16,927 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_safe019_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 07:08:17,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:08:17,113 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:08:17,126 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_safe019_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 07:08:17,135 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:08:17,137 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:08:17,170 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:08:17,205 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:08:17,205 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:08:17,211 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:08:17,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17 WrapperNode [2023-08-04 07:08:17,212 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:08:17,213 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:08:17,214 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:08:17,214 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:08:17,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (1/1) ... [2023-08-04 07:08:17,255 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (1/1) ... [2023-08-04 07:08:17,286 INFO L138 Inliner]: procedures = 177, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 114 [2023-08-04 07:08:17,286 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:08:17,287 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:08:17,287 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:08:17,287 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:08:17,296 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (1/1) ... [2023-08-04 07:08:17,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (1/1) ... [2023-08-04 07:08:17,299 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (1/1) ... [2023-08-04 07:08:17,299 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (1/1) ... [2023-08-04 07:08:17,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (1/1) ... [2023-08-04 07:08:17,309 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (1/1) ... [2023-08-04 07:08:17,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (1/1) ... [2023-08-04 07:08:17,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (1/1) ... [2023-08-04 07:08:17,314 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:08:17,315 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:08:17,315 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:08:17,315 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:08:17,316 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (1/1) ... [2023-08-04 07:08:17,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:08:17,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:08:17,348 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 07:08:17,354 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 07:08:17,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:08:17,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:08:17,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:08:17,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:08:17,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:08:17,384 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:08:17,385 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:08:17,385 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:08:17,385 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:08:17,385 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:08:17,385 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:08:17,385 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:08:17,385 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:08:17,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:08:17,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:08:17,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:08:17,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:08:17,387 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 07:08:17,489 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:08:17,491 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:08:17,680 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:08:17,687 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:08:17,687 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:08:17,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:08:17 BoogieIcfgContainer [2023-08-04 07:08:17,689 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:08:17,693 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:08:17,693 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:08:17,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:08:17,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:08:16" (1/3) ... [2023-08-04 07:08:17,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7573ee44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:08:17, skipping insertion in model container [2023-08-04 07:08:17,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:08:17" (2/3) ... [2023-08-04 07:08:17,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7573ee44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:08:17, skipping insertion in model container [2023-08-04 07:08:17,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:08:17" (3/3) ... [2023-08-04 07:08:17,698 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe019_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:08:17,705 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:08:17,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:08:17,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:08:17,714 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:08:17,791 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:08:17,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 127 transitions, 274 flow [2023-08-04 07:08:18,021 INFO L124 PetriNetUnfolderBase]: 62/860 cut-off events. [2023-08-04 07:08:18,021 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:08:18,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 860 events. 62/860 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5302 event pairs, 0 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 513. Up to 32 conditions per place. [2023-08-04 07:08:18,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 127 transitions, 274 flow [2023-08-04 07:08:18,038 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 109 transitions, 230 flow [2023-08-04 07:08:18,041 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:08:18,057 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 109 transitions, 230 flow [2023-08-04 07:08:18,064 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 109 transitions, 230 flow [2023-08-04 07:08:18,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 109 transitions, 230 flow [2023-08-04 07:08:18,125 INFO L124 PetriNetUnfolderBase]: 46/621 cut-off events. [2023-08-04 07:08:18,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:08:18,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 621 events. 46/621 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3446 event pairs, 0 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 387. Up to 32 conditions per place. [2023-08-04 07:08:18,135 INFO L119 LiptonReduction]: Number of co-enabled transitions 2414 [2023-08-04 07:08:20,200 INFO L134 LiptonReduction]: Checked pairs total: 3403 [2023-08-04 07:08:20,200 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-04 07:08:20,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:08:20,218 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;@2f0b76c0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:08:20,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:08:20,222 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:08:20,222 INFO L124 PetriNetUnfolderBase]: 0/16 cut-off events. [2023-08-04 07:08:20,222 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:08:20,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:08:20,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:08:20,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:08:20,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:08:20,227 INFO L85 PathProgramCache]: Analyzing trace with hash 232914775, now seen corresponding path program 1 times [2023-08-04 07:08:20,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:08:20,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570141789] [2023-08-04 07:08:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:20,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:08:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:20,444 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 07:08:20,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:08:20,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570141789] [2023-08-04 07:08:20,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570141789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:08:20,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:08:20,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:08:20,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771625021] [2023-08-04 07:08:20,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:08:20,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:08:20,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:08:20,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:08:20,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:08:20,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 218 [2023-08-04 07:08:20,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 07:08:20,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:08:20,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 218 [2023-08-04 07:08:20,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:08:20,831 INFO L124 PetriNetUnfolderBase]: 2144/3305 cut-off events. [2023-08-04 07:08:20,831 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-08-04 07:08:20,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6671 conditions, 3305 events. 2144/3305 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18177 event pairs, 1422 based on Foata normal form. 0/3008 useless extension candidates. Maximal degree in co-relation 6657. Up to 3228 conditions per place. [2023-08-04 07:08:20,857 INFO L140 encePairwiseOnDemand]: 214/218 looper letters, 26 selfloop transitions, 2 changer transitions 1/31 dead transitions. [2023-08-04 07:08:20,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 132 flow [2023-08-04 07:08:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:08:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:08:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-04 07:08:20,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611620795107034 [2023-08-04 07:08:20,878 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-04 07:08:20,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-04 07:08:20,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:08:20,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-04 07:08:20,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 07:08:20,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 07:08:20,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 07:08:20,894 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 70 flow. Second operand 3 states and 367 transitions. [2023-08-04 07:08:20,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 132 flow [2023-08-04 07:08:20,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 31 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:08:20,899 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 76 flow [2023-08-04 07:08:20,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-04 07:08:20,905 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-04 07:08:20,906 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 76 flow [2023-08-04 07:08:20,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 07:08:20,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:08:20,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:08:20,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:08:20,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:08:20,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:08:20,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1676823300, now seen corresponding path program 1 times [2023-08-04 07:08:20,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:08:20,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984826765] [2023-08-04 07:08:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:20,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:08:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:21,066 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 07:08:21,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:08:21,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984826765] [2023-08-04 07:08:21,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984826765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:08:21,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398482021] [2023-08-04 07:08:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:21,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:08:21,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:08:21,073 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 07:08:21,093 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 07:08:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:21,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:08:21,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:08:21,184 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 07:08:21,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:08:21,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398482021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:08:21,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:08:21,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:08:21,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788278811] [2023-08-04 07:08:21,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:08:21,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:08:21,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:08:21,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:08:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:08:21,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 218 [2023-08-04 07:08:21,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:08:21,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:08:21,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 218 [2023-08-04 07:08:21,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:08:21,456 INFO L124 PetriNetUnfolderBase]: 1748/2648 cut-off events. [2023-08-04 07:08:21,458 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 07:08:21,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5339 conditions, 2648 events. 1748/2648 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13447 event pairs, 1204 based on Foata normal form. 0/2440 useless extension candidates. Maximal degree in co-relation 5322. Up to 2551 conditions per place. [2023-08-04 07:08:21,478 INFO L140 encePairwiseOnDemand]: 215/218 looper letters, 28 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-08-04 07:08:21,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 148 flow [2023-08-04 07:08:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:08:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:08:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-04 07:08:21,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626911314984709 [2023-08-04 07:08:21,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-04 07:08:21,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-04 07:08:21,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:08:21,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-04 07:08:21,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 07:08:21,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 07:08:21,490 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 07:08:21,490 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 76 flow. Second operand 3 states and 368 transitions. [2023-08-04 07:08:21,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 148 flow [2023-08-04 07:08:21,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:08:21,492 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 80 flow [2023-08-04 07:08:21,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-08-04 07:08:21,493 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-04 07:08:21,493 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 80 flow [2023-08-04 07:08:21,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:08:21,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:08:21,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:08:21,508 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 07:08:21,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:08:21,702 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:08:21,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:08:21,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1984365127, now seen corresponding path program 1 times [2023-08-04 07:08:21,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:08:21,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921200594] [2023-08-04 07:08:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:21,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:08:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:21,780 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 07:08:21,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:08:21,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921200594] [2023-08-04 07:08:21,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921200594] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:08:21,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052908048] [2023-08-04 07:08:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:21,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:08:21,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:08:21,782 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 07:08:21,786 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 07:08:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:21,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:08:21,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:08:21,877 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 07:08:21,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:08:21,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052908048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:08:21,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:08:21,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:08:21,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627474050] [2023-08-04 07:08:21,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:08:21,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:08:21,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:08:21,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:08:21,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:08:21,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 218 [2023-08-04 07:08:21,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:08:21,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:08:21,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 218 [2023-08-04 07:08:21,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:08:22,067 INFO L124 PetriNetUnfolderBase]: 1448/2116 cut-off events. [2023-08-04 07:08:22,067 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 07:08:22,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4345 conditions, 2116 events. 1448/2116 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9909 event pairs, 1010 based on Foata normal form. 0/1980 useless extension candidates. Maximal degree in co-relation 4328. Up to 2000 conditions per place. [2023-08-04 07:08:22,079 INFO L140 encePairwiseOnDemand]: 215/218 looper letters, 30 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-08-04 07:08:22,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 160 flow [2023-08-04 07:08:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:08:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:08:22,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-04 07:08:22,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657492354740061 [2023-08-04 07:08:22,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-04 07:08:22,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-04 07:08:22,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:08:22,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-04 07:08:22,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 07:08:22,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 07:08:22,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 07:08:22,085 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 80 flow. Second operand 3 states and 370 transitions. [2023-08-04 07:08:22,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 160 flow [2023-08-04 07:08:22,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:08:22,086 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 84 flow [2023-08-04 07:08:22,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-04 07:08:22,087 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-04 07:08:22,087 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 84 flow [2023-08-04 07:08:22,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:08:22,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:08:22,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:08:22,096 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 07:08:22,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 07:08:22,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:08:22,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:08:22,294 INFO L85 PathProgramCache]: Analyzing trace with hash -485451344, now seen corresponding path program 1 times [2023-08-04 07:08:22,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:08:22,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956159694] [2023-08-04 07:08:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:22,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:08:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:22,360 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 07:08:22,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:08:22,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956159694] [2023-08-04 07:08:22,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956159694] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:08:22,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582026059] [2023-08-04 07:08:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:22,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:08:22,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:08:22,362 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 07:08:22,365 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 07:08:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:22,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:08:22,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:08:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:08:22,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:08:22,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582026059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:08:22,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:08:22,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:08:22,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471465359] [2023-08-04 07:08:22,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:08:22,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:08:22,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:08:22,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:08:22,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:08:22,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 218 [2023-08-04 07:08:22,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:08:22,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:08:22,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 218 [2023-08-04 07:08:22,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:08:22,692 INFO L124 PetriNetUnfolderBase]: 1340/1954 cut-off events. [2023-08-04 07:08:22,692 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-04 07:08:22,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4100 conditions, 1954 events. 1340/1954 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8600 event pairs, 854 based on Foata normal form. 0/1863 useless extension candidates. Maximal degree in co-relation 4082. Up to 1538 conditions per place. [2023-08-04 07:08:22,702 INFO L140 encePairwiseOnDemand]: 215/218 looper letters, 32 selfloop transitions, 2 changer transitions 1/37 dead transitions. [2023-08-04 07:08:22,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 172 flow [2023-08-04 07:08:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:08:22,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:08:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-08-04 07:08:22,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5688073394495413 [2023-08-04 07:08:22,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-08-04 07:08:22,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-08-04 07:08:22,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:08:22,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-08-04 07:08:22,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 07:08:22,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 07:08:22,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states 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 07:08:22,707 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 84 flow. Second operand 3 states and 372 transitions. [2023-08-04 07:08:22,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 172 flow [2023-08-04 07:08:22,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:08:22,711 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 88 flow [2023-08-04 07:08:22,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-08-04 07:08:22,712 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2023-08-04 07:08:22,712 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 88 flow [2023-08-04 07:08:22,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:08:22,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:08:22,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:08:22,718 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 07:08:22,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:08:22,918 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:08:22,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:08:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash -925582200, now seen corresponding path program 1 times [2023-08-04 07:08:22,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:08:22,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203522868] [2023-08-04 07:08:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:22,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:08:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:08:22,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:08:22,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203522868] [2023-08-04 07:08:22,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203522868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:08:22,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107191483] [2023-08-04 07:08:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:22,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:08:22,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:08:22,994 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 07:08:22,997 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 07:08:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:23,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:08:23,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:08:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:08:23,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:08:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:08:23,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107191483] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:08:23,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:08:23,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:08:23,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458738010] [2023-08-04 07:08:23,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:08:23,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:08:23,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:08:23,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:08:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:08:23,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 218 [2023-08-04 07:08:23,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 115.4) internal successors, (577), 5 states have internal predecessors, (577), 0 states have call successors, (0), 0 states 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 07:08:23,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:08:23,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 218 [2023-08-04 07:08:23,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:08:23,180 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:08:23,180 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:08:23,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 07:08:23,181 INFO L140 encePairwiseOnDemand]: 215/218 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:08:23,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 10 transitions, 43 flow [2023-08-04 07:08:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:08:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:08:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2023-08-04 07:08:23,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5206422018348624 [2023-08-04 07:08:23,182 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2023-08-04 07:08:23,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2023-08-04 07:08:23,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:08:23,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2023-08-04 07:08:23,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states 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 07:08:23,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states 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 07:08:23,186 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states 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 07:08:23,186 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 88 flow. Second operand 4 states and 454 transitions. [2023-08-04 07:08:23,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 10 transitions, 43 flow [2023-08-04 07:08:23,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:08:23,187 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 07:08:23,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-04 07:08:23,190 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -17 predicate places. [2023-08-04 07:08:23,190 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 07:08:23,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.4) internal successors, (577), 5 states have internal predecessors, (577), 0 states have call successors, (0), 0 states 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 07:08:23,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:08:23,203 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 07:08:23,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:08:23,400 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 07:08:23,401 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:08:23,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 127 transitions, 274 flow [2023-08-04 07:08:23,468 INFO L124 PetriNetUnfolderBase]: 62/860 cut-off events. [2023-08-04 07:08:23,468 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:08:23,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 860 events. 62/860 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5302 event pairs, 0 based on Foata normal form. 0/752 useless extension candidates. Maximal degree in co-relation 513. Up to 32 conditions per place. [2023-08-04 07:08:23,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 127 transitions, 274 flow [2023-08-04 07:08:23,471 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 97 transitions, 214 flow [2023-08-04 07:08:23,471 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:08:23,472 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 97 transitions, 214 flow [2023-08-04 07:08:23,472 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 97 transitions, 214 flow [2023-08-04 07:08:23,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 97 transitions, 214 flow [2023-08-04 07:08:23,498 INFO L124 PetriNetUnfolderBase]: 14/380 cut-off events. [2023-08-04 07:08:23,498 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:08:23,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 380 events. 14/380 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1738 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 273. Up to 16 conditions per place. [2023-08-04 07:08:23,503 INFO L119 LiptonReduction]: Number of co-enabled transitions 1822 [2023-08-04 07:08:25,195 INFO L134 LiptonReduction]: Checked pairs total: 2735 [2023-08-04 07:08:25,196 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-04 07:08:25,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:08:25,198 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;@2f0b76c0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:08:25,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:08:25,201 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:08:25,201 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 07:08:25,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:08:25,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:08:25,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:08:25,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:08:25,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:08:25,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1864372837, now seen corresponding path program 1 times [2023-08-04 07:08:25,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:08:25,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526419583] [2023-08-04 07:08:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:25,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:08:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:08:25,213 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:08:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:08:25,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:08:25,232 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:08:25,232 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:08:25,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:08:25,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:08:25,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:08:25,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:08:25,233 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:08:25,234 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:08:25,234 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:08:25,234 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:08:25,255 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:08:25,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 153 transitions, 354 flow [2023-08-04 07:08:25,626 INFO L124 PetriNetUnfolderBase]: 282/4025 cut-off events. [2023-08-04 07:08:25,626 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:08:25,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4314 conditions, 4025 events. 282/4025 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 38325 event pairs, 0 based on Foata normal form. 0/3542 useless extension candidates. Maximal degree in co-relation 2928. Up to 162 conditions per place. [2023-08-04 07:08:25,645 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 153 transitions, 354 flow [2023-08-04 07:08:25,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 135 transitions, 302 flow [2023-08-04 07:08:25,652 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:08:25,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 135 transitions, 302 flow [2023-08-04 07:08:25,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 135 transitions, 302 flow [2023-08-04 07:08:25,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 135 transitions, 302 flow [2023-08-04 07:08:25,893 INFO L124 PetriNetUnfolderBase]: 201/2851 cut-off events. [2023-08-04 07:08:25,893 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 07:08:25,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3060 conditions, 2851 events. 201/2851 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 24921 event pairs, 0 based on Foata normal form. 0/2530 useless extension candidates. Maximal degree in co-relation 2133. Up to 162 conditions per place. [2023-08-04 07:08:25,961 INFO L119 LiptonReduction]: Number of co-enabled transitions 5976 [2023-08-04 07:08:27,898 INFO L134 LiptonReduction]: Checked pairs total: 10644 [2023-08-04 07:08:27,898 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-04 07:08:27,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:08:27,900 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;@2f0b76c0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:08:27,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:08:27,902 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:08:27,902 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2023-08-04 07:08:27,902 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:08:27,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:08:27,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:08:27,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:08:27,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:08:27,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2058265211, now seen corresponding path program 1 times [2023-08-04 07:08:27,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:08:27,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271436755] [2023-08-04 07:08:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:27,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:08:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:27,943 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 07:08:27,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:08:27,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271436755] [2023-08-04 07:08:27,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271436755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:08:27,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:08:27,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:08:27,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187978116] [2023-08-04 07:08:27,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:08:27,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:08:27,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:08:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:08:27,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:08:27,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 252 [2023-08-04 07:08:27,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 07:08:27,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:08:27,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 252 [2023-08-04 07:08:27,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:09:15,599 INFO L124 PetriNetUnfolderBase]: 576290/726459 cut-off events. [2023-08-04 07:09:15,599 INFO L125 PetriNetUnfolderBase]: For 20301/20301 co-relation queries the response was YES. [2023-08-04 07:09:18,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463140 conditions, 726459 events. 576290/726459 cut-off events. For 20301/20301 co-relation queries the response was YES. Maximal size of possible extension queue 15251. Compared 4695214 event pairs, 485484 based on Foata normal form. 0/694157 useless extension candidates. Maximal degree in co-relation 432594. Up to 712500 conditions per place. [2023-08-04 07:09:20,677 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 40 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 07:09:20,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 50 transitions, 216 flow [2023-08-04 07:09:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:09:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:09:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-08-04 07:09:20,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2023-08-04 07:09:20,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-08-04 07:09:20,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-08-04 07:09:20,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:09:20,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-08-04 07:09:20,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states 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 07:09:20,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 07:09:20,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 07:09:20,688 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 126 flow. Second operand 3 states and 446 transitions. [2023-08-04 07:09:20,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 50 transitions, 216 flow [2023-08-04 07:09:20,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 50 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:09:20,690 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 136 flow [2023-08-04 07:09:20,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2023-08-04 07:09:20,691 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-04 07:09:20,691 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 136 flow [2023-08-04 07:09:20,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 07:09:20,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:09:20,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:09:20,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:09:20,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:09:20,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:09:20,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1369919787, now seen corresponding path program 1 times [2023-08-04 07:09:20,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:09:20,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751613933] [2023-08-04 07:09:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:09:20,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:09:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:09:20,738 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 07:09:20,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:09:20,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751613933] [2023-08-04 07:09:20,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751613933] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:09:20,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614924872] [2023-08-04 07:09:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:09:20,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:09:20,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:09:20,740 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 07:09:20,742 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 07:09:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:09:20,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:09:20,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:09:20,827 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 07:09:20,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:09:20,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614924872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:09:20,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:09:20,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:09:20,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517348975] [2023-08-04 07:09:20,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:09:20,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:09:20,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:09:20,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:09:20,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:09:20,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 252 [2023-08-04 07:09:20,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states 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 07:09:20,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:09:20,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 252 [2023-08-04 07:09:20,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:10:07,939 INFO L124 PetriNetUnfolderBase]: 543278/686261 cut-off events. [2023-08-04 07:10:07,940 INFO L125 PetriNetUnfolderBase]: For 17703/17703 co-relation queries the response was YES. [2023-08-04 07:10:10,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1377672 conditions, 686261 events. 543278/686261 cut-off events. For 17703/17703 co-relation queries the response was YES. Maximal size of possible extension queue 15348. Compared 4448005 event pairs, 459424 based on Foata normal form. 0/658000 useless extension candidates. Maximal degree in co-relation 1377633. Up to 668923 conditions per place. [2023-08-04 07:10:12,959 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 45 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 07:10:12,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 246 flow [2023-08-04 07:10:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:10:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:10:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-04 07:10:12,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593915343915344 [2023-08-04 07:10:12,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-04 07:10:12,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-04 07:10:12,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:10:12,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-04 07:10:12,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 07:10:12,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 07:10:12,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 07:10:12,965 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 136 flow. Second operand 3 states and 449 transitions. [2023-08-04 07:10:12,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 246 flow [2023-08-04 07:10:12,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:10:12,971 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 146 flow [2023-08-04 07:10:12,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2023-08-04 07:10:12,972 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2023-08-04 07:10:12,972 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 146 flow [2023-08-04 07:10:12,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states 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 07:10:12,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:10:12,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:10:12,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 07:10:13,178 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 07:10:13,178 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:10:13,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:10:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1381148116, now seen corresponding path program 1 times [2023-08-04 07:10:13,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:10:13,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883187269] [2023-08-04 07:10:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:10:13,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:10:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:10:13,219 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 07:10:13,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:10:13,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883187269] [2023-08-04 07:10:13,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883187269] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:10:13,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095506539] [2023-08-04 07:10:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:10:13,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:10:13,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:10:13,221 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 07:10:13,225 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 07:10:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:10:13,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:10:13,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:10:13,316 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 07:10:13,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:10:13,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095506539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:10:13,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:10:13,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:10:13,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867254204] [2023-08-04 07:10:13,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:10:13,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:10:13,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:10:13,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:10:13,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:10:13,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 252 [2023-08-04 07:10:13,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 07:10:13,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:10:13,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 252 [2023-08-04 07:10:13,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:10:58,081 INFO L124 PetriNetUnfolderBase]: 512846/639698 cut-off events. [2023-08-04 07:10:58,082 INFO L125 PetriNetUnfolderBase]: For 13793/13793 co-relation queries the response was YES. [2023-08-04 07:11:00,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1290211 conditions, 639698 events. 512846/639698 cut-off events. For 13793/13793 co-relation queries the response was YES. Maximal size of possible extension queue 14875. Compared 4005801 event pairs, 434270 based on Foata normal form. 0/614638 useless extension candidates. Maximal degree in co-relation 382998. Up to 627005 conditions per place. [2023-08-04 07:11:02,818 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 50 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 07:11:02,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 274 flow [2023-08-04 07:11:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:11:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:11:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-08-04 07:11:02,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2023-08-04 07:11:02,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-08-04 07:11:02,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-08-04 07:11:02,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:11:02,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-08-04 07:11:02,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states 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 07:11:02,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 07:11:02,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 07:11:02,823 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 146 flow. Second operand 3 states and 453 transitions. [2023-08-04 07:11:02,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 274 flow [2023-08-04 07:11:02,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 60 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:11:02,834 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 156 flow [2023-08-04 07:11:02,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2023-08-04 07:11:02,835 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-04 07:11:02,835 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 156 flow [2023-08-04 07:11:02,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 07:11:02,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:11:02,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:11:02,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 07:11:03,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:11:03,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:11:03,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:11:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash 996157534, now seen corresponding path program 1 times [2023-08-04 07:11:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:11:03,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944005002] [2023-08-04 07:11:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:11:03,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:11:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:11:03,102 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 07:11:03,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:11:03,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944005002] [2023-08-04 07:11:03,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944005002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:11:03,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324011198] [2023-08-04 07:11:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:11:03,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:11:03,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:11:03,104 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 07:11:03,107 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 07:11:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:11:03,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:11:03,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:11:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:11:03,201 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:11:03,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324011198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:11:03,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:11:03,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:11:03,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927168442] [2023-08-04 07:11:03,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:11:03,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:11:03,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:11:03,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:11:03,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:11:03,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 252 [2023-08-04 07:11:03,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states 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 07:11:03,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:11:03,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 252 [2023-08-04 07:11:03,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:11:47,362 INFO L124 PetriNetUnfolderBase]: 500750/624398 cut-off events. [2023-08-04 07:11:47,362 INFO L125 PetriNetUnfolderBase]: For 10153/10153 co-relation queries the response was YES. [2023-08-04 07:11:50,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1263356 conditions, 624398 events. 500750/624398 cut-off events. For 10153/10153 co-relation queries the response was YES. Maximal size of possible extension queue 14869. Compared 3838059 event pairs, 404846 based on Foata normal form. 0/603622 useless extension candidates. Maximal degree in co-relation 370844. Up to 574973 conditions per place. [2023-08-04 07:11:52,200 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 55 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 07:11:52,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 302 flow [2023-08-04 07:11:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:11:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:11:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-04 07:11:52,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6044973544973545 [2023-08-04 07:11:52,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-04 07:11:52,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-04 07:11:52,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:11:52,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-04 07:11:52,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states 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 07:11:52,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 07:11:52,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 07:11:52,206 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 156 flow. Second operand 3 states and 457 transitions. [2023-08-04 07:11:52,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 302 flow [2023-08-04 07:11:52,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:11:52,231 INFO L231 Difference]: Finished difference. Result has 72 places, 50 transitions, 166 flow [2023-08-04 07:11:52,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=72, PETRI_TRANSITIONS=50} [2023-08-04 07:11:52,232 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-04 07:11:52,232 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 50 transitions, 166 flow [2023-08-04 07:11:52,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states 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 07:11:52,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:11:52,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:11:52,240 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 07:11:52,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:11:52,437 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:11:52,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:11:52,437 INFO L85 PathProgramCache]: Analyzing trace with hash -990480747, now seen corresponding path program 1 times [2023-08-04 07:11:52,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:11:52,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097606871] [2023-08-04 07:11:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:11:52,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:11:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:11:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:11:52,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:11:52,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097606871] [2023-08-04 07:11:52,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097606871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:11:52,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551574556] [2023-08-04 07:11:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:11:52,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:11:52,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:11:52,488 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 07:11:52,492 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 07:11:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:11:52,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:11:52,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:11:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:11:52,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:11:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:11:52,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551574556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:11:52,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:11:52,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:11:52,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434122635] [2023-08-04 07:11:52,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:11:52,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:11:52,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:11:52,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:11:52,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:11:52,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 252 [2023-08-04 07:11:52,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 50 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:11:52,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:11:52,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 252 [2023-08-04 07:11:52,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:12:28,773 INFO L124 PetriNetUnfolderBase]: 389704/482120 cut-off events. [2023-08-04 07:12:28,773 INFO L125 PetriNetUnfolderBase]: For 43953/43953 co-relation queries the response was YES. [2023-08-04 07:12:30,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011464 conditions, 482120 events. 389704/482120 cut-off events. For 43953/43953 co-relation queries the response was YES. Maximal size of possible extension queue 11678. Compared 2837475 event pairs, 276612 based on Foata normal form. 3/481771 useless extension candidates. Maximal degree in co-relation 355983. Up to 474490 conditions per place. [2023-08-04 07:12:32,641 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 46 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-04 07:12:32,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 58 transitions, 282 flow [2023-08-04 07:12:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:12:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:12:32,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 580 transitions. [2023-08-04 07:12:32,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2023-08-04 07:12:32,643 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 580 transitions. [2023-08-04 07:12:32,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 580 transitions. [2023-08-04 07:12:32,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:12:32,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 580 transitions. [2023-08-04 07:12:32,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:12:32,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 07:12:32,646 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 07:12:32,646 INFO L175 Difference]: Start difference. First operand has 72 places, 50 transitions, 166 flow. Second operand 4 states and 580 transitions. [2023-08-04 07:12:32,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 58 transitions, 282 flow [2023-08-04 07:12:32,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:12:32,823 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 178 flow [2023-08-04 07:12:32,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2023-08-04 07:12:32,824 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2023-08-04 07:12:32,824 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 178 flow [2023-08-04 07:12:32,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:12:32,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:12:32,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:12:32,830 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 07:12:33,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 07:12:33,030 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:12:33,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:12:33,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1637718706, now seen corresponding path program 1 times [2023-08-04 07:12:33,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:12:33,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998376665] [2023-08-04 07:12:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:12:33,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:12:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:12:33,087 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 07:12:33,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:12:33,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998376665] [2023-08-04 07:12:33,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998376665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:12:33,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073847355] [2023-08-04 07:12:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:12:33,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:12:33,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:12:33,089 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 07:12:33,092 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 07:12:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:12:33,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:12:33,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:12:33,209 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 07:12:33,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:12:33,225 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 07:12:33,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073847355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:12:33,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:12:33,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:12:33,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21541713] [2023-08-04 07:12:33,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:12:33,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:12:33,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:12:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:12:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:12:33,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 252 [2023-08-04 07:12:33,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 0 states 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 07:12:33,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:12:33,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 252 [2023-08-04 07:12:33,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:12:57,699 INFO L124 PetriNetUnfolderBase]: 303022/372454 cut-off events. [2023-08-04 07:12:57,699 INFO L125 PetriNetUnfolderBase]: For 30465/30465 co-relation queries the response was YES. [2023-08-04 07:12:59,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777479 conditions, 372454 events. 303022/372454 cut-off events. For 30465/30465 co-relation queries the response was YES. Maximal size of possible extension queue 9749. Compared 2097400 event pairs, 217966 based on Foata normal form. 27/372237 useless extension candidates. Maximal degree in co-relation 273290. Up to 365929 conditions per place. [2023-08-04 07:13:00,666 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 54 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 07:13:00,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 66 transitions, 326 flow [2023-08-04 07:13:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:13:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:13:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 588 transitions. [2023-08-04 07:13:00,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-08-04 07:13:00,668 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 588 transitions. [2023-08-04 07:13:00,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 588 transitions. [2023-08-04 07:13:00,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:13:00,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 588 transitions. [2023-08-04 07:13:00,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 07:13:00,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 07:13:00,672 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 07:13:00,672 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 178 flow. Second operand 4 states and 588 transitions. [2023-08-04 07:13:00,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 66 transitions, 326 flow [2023-08-04 07:13:00,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 319 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:13:00,733 INFO L231 Difference]: Finished difference. Result has 78 places, 50 transitions, 185 flow [2023-08-04 07:13:00,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=78, PETRI_TRANSITIONS=50} [2023-08-04 07:13:00,734 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 15 predicate places. [2023-08-04 07:13:00,734 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 50 transitions, 185 flow [2023-08-04 07:13:00,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 0 states 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 07:13:00,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:13:00,735 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:13:00,743 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 07:13:00,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:13:00,944 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:13:00,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:13:00,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1644313486, now seen corresponding path program 1 times [2023-08-04 07:13:00,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:13:00,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277633182] [2023-08-04 07:13:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:13:00,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:13:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:13:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:13:00,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:13:00,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277633182] [2023-08-04 07:13:00,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277633182] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:13:00,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201924626] [2023-08-04 07:13:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:13:00,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:13:00,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:13:00,996 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 07:13:01,001 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 07:13:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:13:01,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:13:01,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:13:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:13:01,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:13:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:13:01,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201924626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:13:01,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:13:01,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:13:01,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548144716] [2023-08-04 07:13:01,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:13:01,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:13:01,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:13:01,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:13:01,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:13:01,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 252 [2023-08-04 07:13:01,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 50 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 07:13:01,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:13:01,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 252 [2023-08-04 07:13:01,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:13:21,117 INFO L124 PetriNetUnfolderBase]: 237520/289942 cut-off events. [2023-08-04 07:13:21,117 INFO L125 PetriNetUnfolderBase]: For 22060/22060 co-relation queries the response was YES. [2023-08-04 07:13:22,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605632 conditions, 289942 events. 237520/289942 cut-off events. For 22060/22060 co-relation queries the response was YES. Maximal size of possible extension queue 8808. Compared 1590158 event pairs, 168724 based on Foata normal form. 243/290184 useless extension candidates. Maximal degree in co-relation 212642. Up to 275692 conditions per place. [2023-08-04 07:13:23,482 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 62 selfloop transitions, 3 changer transitions 1/74 dead transitions. [2023-08-04 07:13:23,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 365 flow [2023-08-04 07:13:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:13:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:13:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 596 transitions. [2023-08-04 07:13:23,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2023-08-04 07:13:23,485 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 596 transitions. [2023-08-04 07:13:23,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 596 transitions. [2023-08-04 07:13:23,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:13:23,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 596 transitions. [2023-08-04 07:13:23,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 07:13:23,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 07:13:23,488 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 07:13:23,488 INFO L175 Difference]: Start difference. First operand has 78 places, 50 transitions, 185 flow. Second operand 4 states and 596 transitions. [2023-08-04 07:13:23,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 365 flow [2023-08-04 07:13:23,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 74 transitions, 358 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:13:23,615 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 192 flow [2023-08-04 07:13:23,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2023-08-04 07:13:23,616 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2023-08-04 07:13:23,616 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 192 flow [2023-08-04 07:13:23,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 07:13:23,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:13:23,617 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 07:13:23,623 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 07:13:23,818 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,SelfDestructingSolverStorable12 [2023-08-04 07:13:23,818 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:13:23,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:13:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash -372383561, now seen corresponding path program 1 times [2023-08-04 07:13:23,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:13:23,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709315240] [2023-08-04 07:13:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:13:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:13:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:13:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:13:23,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:13:23,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709315240] [2023-08-04 07:13:23,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709315240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:13:23,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313580730] [2023-08-04 07:13:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:13:23,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:13:23,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:13:23,878 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 07:13:23,880 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 07:13:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:13:23,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:13:23,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:13:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:13:24,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:13:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:13:24,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313580730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:13:24,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:13:24,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:13:24,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434179261] [2023-08-04 07:13:24,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:13:24,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:13:24,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:13:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:13:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:13:24,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 252 [2023-08-04 07:13:24,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 07:13:24,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:13:24,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 252 [2023-08-04 07:13:24,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:13:41,391 INFO L124 PetriNetUnfolderBase]: 214192/261673 cut-off events. [2023-08-04 07:13:41,391 INFO L125 PetriNetUnfolderBase]: For 21472/21472 co-relation queries the response was YES. [2023-08-04 07:13:42,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549490 conditions, 261673 events. 214192/261673 cut-off events. For 21472/21472 co-relation queries the response was YES. Maximal size of possible extension queue 8224. Compared 1391929 event pairs, 91720 based on Foata normal form. 2187/263859 useless extension candidates. Maximal degree in co-relation 192794. Up to 135913 conditions per place. [2023-08-04 07:13:43,283 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 70 selfloop transitions, 3 changer transitions 1/82 dead transitions. [2023-08-04 07:13:43,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 404 flow [2023-08-04 07:13:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:13:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:13:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-04 07:13:43,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2023-08-04 07:13:43,285 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-04 07:13:43,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-04 07:13:43,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:13:43,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-04 07:13:43,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 07:13:43,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 07:13:43,288 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states 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 07:13:43,288 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 192 flow. Second operand 4 states and 604 transitions. [2023-08-04 07:13:43,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 404 flow [2023-08-04 07:13:43,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 397 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:13:43,360 INFO L231 Difference]: Finished difference. Result has 82 places, 50 transitions, 199 flow [2023-08-04 07:13:43,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=82, PETRI_TRANSITIONS=50} [2023-08-04 07:13:43,360 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2023-08-04 07:13:43,360 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 50 transitions, 199 flow [2023-08-04 07:13:43,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 07:13:43,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:13:43,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:13:43,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 07:13:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 07:13:43,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:13:43,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:13:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1698926097, now seen corresponding path program 1 times [2023-08-04 07:13:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:13:43,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592641635] [2023-08-04 07:13:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:13:43,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:13:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:13:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 07:13:43,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:13:43,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592641635] [2023-08-04 07:13:43,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592641635] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:13:43,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:13:43,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:13:43,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776895356] [2023-08-04 07:13:43,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:13:43,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:13:43,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:13:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:13:43,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:13:43,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 252 [2023-08-04 07:13:43,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 50 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states 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 07:13:43,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:13:43,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 252 [2023-08-04 07:13:43,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:15:27,652 INFO L124 PetriNetUnfolderBase]: 1014403/1221748 cut-off events. [2023-08-04 07:15:27,652 INFO L125 PetriNetUnfolderBase]: For 478958/478958 co-relation queries the response was YES. [2023-08-04 07:15:37,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731807 conditions, 1221748 events. 1014403/1221748 cut-off events. For 478958/478958 co-relation queries the response was YES. Maximal size of possible extension queue 25396. Compared 6735807 event pairs, 447346 based on Foata normal form. 15561/1236891 useless extension candidates. Maximal degree in co-relation 2731713. Up to 814246 conditions per place. [2023-08-04 07:15:42,595 INFO L140 encePairwiseOnDemand]: 240/252 looper letters, 78 selfloop transitions, 11 changer transitions 0/93 dead transitions. [2023-08-04 07:15:42,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 93 transitions, 556 flow [2023-08-04 07:15:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:15:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:15:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 07:15:42,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2023-08-04 07:15:42,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 07:15:42,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 07:15:42,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:15:42,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 07:15:42,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states 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 07:15:42,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 07:15:42,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 07:15:42,616 INFO L175 Difference]: Start difference. First operand has 82 places, 50 transitions, 199 flow. Second operand 3 states and 454 transitions. [2023-08-04 07:15:42,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 93 transitions, 556 flow [2023-08-04 07:16:57,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 93 transitions, 542 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:16:57,526 INFO L231 Difference]: Finished difference. Result has 83 places, 60 transitions, 278 flow [2023-08-04 07:16:57,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2023-08-04 07:16:57,528 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2023-08-04 07:16:57,529 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 278 flow [2023-08-04 07:16:57,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states 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 07:16:57,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:16:57,529 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:16:57,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 07:16:57,529 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:16:57,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:16:57,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1127102459, now seen corresponding path program 1 times [2023-08-04 07:16:57,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:16:57,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637143104] [2023-08-04 07:16:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:16:57,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:16:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:16:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 07:16:57,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:16:57,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637143104] [2023-08-04 07:16:57,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637143104] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:16:57,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:16:57,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:16:57,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032216758] [2023-08-04 07:16:57,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:16:57,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:16:57,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:16:57,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:16:57,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:16:57,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 252 [2023-08-04 07:16:57,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 129.75) internal successors, (519), 4 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 07:16:57,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:16:57,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 252 [2023-08-04 07:16:57,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand