/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe000_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:59:17,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:59:17,915 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:59:17,919 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:59:17,919 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:59:17,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:59:17,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:59:17,937 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:59:17,938 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:59:17,938 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:59:17,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:59:17,939 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:59:17,940 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:59:17,940 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:59:17,940 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:59:17,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:59:17,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:59:17,941 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:59:17,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:59:17,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:59:17,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:59:17,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:59:17,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:59:17,944 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:59:17,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:59:17,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:59:17,945 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:59:17,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:59:17,945 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:59:17,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:59:17,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:59:17,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:59:17,947 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:59:17,947 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:59:17,947 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:59:17,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:59:17,948 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:59:17,948 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:59:17,949 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:59:17,949 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:59:17,949 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:59:17,950 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:59:18,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:59:18,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:59:18,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:59:18,206 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:59:18,206 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:59:18,207 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe000_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-03 23:59:19,377 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:59:19,621 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:59:19,621 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe000_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-03 23:59:19,644 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ac00cdd3/7985fc9327f2441084d4e439a9df58a9/FLAG9dbfa6856 [2023-08-03 23:59:19,661 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ac00cdd3/7985fc9327f2441084d4e439a9df58a9 [2023-08-03 23:59:19,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:59:19,666 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:59:19,667 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:59:19,667 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:59:19,671 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:59:19,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:59:19" (1/1) ... [2023-08-03 23:59:19,672 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63dd1039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:19, skipping insertion in model container [2023-08-03 23:59:19,672 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:59:19" (1/1) ... [2023-08-03 23:59:19,726 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:59:19,845 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_safe000_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-03 23:59:19,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:59:19,969 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:59:19,979 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_safe000_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-03 23:59:20,000 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:59:20,009 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:59:20,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:59:20,053 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:59:20,054 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:59:20,060 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:59:20,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20 WrapperNode [2023-08-03 23:59:20,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:59:20,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:59:20,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:59:20,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:59:20,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (1/1) ... [2023-08-03 23:59:20,081 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (1/1) ... [2023-08-03 23:59:20,099 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2023-08-03 23:59:20,099 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:59:20,100 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:59:20,100 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:59:20,100 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:59:20,107 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (1/1) ... [2023-08-03 23:59:20,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (1/1) ... [2023-08-03 23:59:20,111 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (1/1) ... [2023-08-03 23:59:20,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (1/1) ... [2023-08-03 23:59:20,118 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (1/1) ... [2023-08-03 23:59:20,121 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (1/1) ... [2023-08-03 23:59:20,123 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (1/1) ... [2023-08-03 23:59:20,124 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (1/1) ... [2023-08-03 23:59:20,126 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:59:20,127 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:59:20,127 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:59:20,127 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:59:20,128 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (1/1) ... [2023-08-03 23:59:20,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:59:20,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:20,160 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:59:20,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:59:20,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:59:20,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:59:20,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:59:20,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:59:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:59:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:59:20,187 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:59:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:59:20,187 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:59:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:59:20,187 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:59:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:59:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:59:20,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:59:20,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:59:20,189 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:59:20,304 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:59:20,305 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:59:20,469 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:59:20,475 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:59:20,476 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:59:20,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:59:20 BoogieIcfgContainer [2023-08-03 23:59:20,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:59:20,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:59:20,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:59:20,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:59:20,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:59:19" (1/3) ... [2023-08-03 23:59:20,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c109473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:59:20, skipping insertion in model container [2023-08-03 23:59:20,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:59:20" (2/3) ... [2023-08-03 23:59:20,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c109473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:59:20, skipping insertion in model container [2023-08-03 23:59:20,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:59:20" (3/3) ... [2023-08-03 23:59:20,485 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe000_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-03 23:59:20,491 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:59:20,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:59:20,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 23:59:20,500 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:59:20,549 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:59:20,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 106 transitions, 227 flow [2023-08-03 23:59:20,706 INFO L124 PetriNetUnfolderBase]: 30/414 cut-off events. [2023-08-03 23:59:20,706 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:59:20,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 414 events. 30/414 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1842 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 243. Up to 16 conditions per place. [2023-08-03 23:59:20,712 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 106 transitions, 227 flow [2023-08-03 23:59:20,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 78 transitions, 171 flow [2023-08-03 23:59:20,718 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:59:20,725 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 78 transitions, 171 flow [2023-08-03 23:59:20,728 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 78 transitions, 171 flow [2023-08-03 23:59:20,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 78 transitions, 171 flow [2023-08-03 23:59:20,754 INFO L124 PetriNetUnfolderBase]: 6/190 cut-off events. [2023-08-03 23:59:20,755 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:59:20,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 190 events. 6/190 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 585 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 131. Up to 8 conditions per place. [2023-08-03 23:59:20,757 INFO L119 LiptonReduction]: Number of co-enabled transitions 1116 [2023-08-03 23:59:22,395 INFO L134 LiptonReduction]: Checked pairs total: 2186 [2023-08-03 23:59:22,395 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-03 23:59:22,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:59:22,412 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;@63bebf32, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:59:22,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:59:22,417 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:59:22,417 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-03 23:59:22,417 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:59:22,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:22,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:59:22,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:59:22,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:22,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1955622297, now seen corresponding path program 1 times [2023-08-03 23:59:22,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:22,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028891111] [2023-08-03 23:59:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:22,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:59:22,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:59:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:59:22,569 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:59:22,571 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:59:22,572 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:59:22,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:59:22,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:59:22,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:59:22,574 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 23:59:22,577 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:59:22,577 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:59:22,577 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:59:22,600 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:59:22,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 127 transitions, 290 flow [2023-08-03 23:59:22,750 INFO L124 PetriNetUnfolderBase]: 93/1304 cut-off events. [2023-08-03 23:59:22,750 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:59:22,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 1304 events. 93/1304 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8852 event pairs, 0 based on Foata normal form. 0/1145 useless extension candidates. Maximal degree in co-relation 945. Up to 54 conditions per place. [2023-08-03 23:59:22,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 127 transitions, 290 flow [2023-08-03 23:59:22,763 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 99 transitions, 234 flow [2023-08-03 23:59:22,763 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:59:22,763 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 99 transitions, 234 flow [2023-08-03 23:59:22,763 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 99 transitions, 234 flow [2023-08-03 23:59:22,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 99 transitions, 234 flow [2023-08-03 23:59:22,822 INFO L124 PetriNetUnfolderBase]: 12/548 cut-off events. [2023-08-03 23:59:22,823 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:59:22,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 548 events. 12/548 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2790 event pairs, 0 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 441. Up to 27 conditions per place. [2023-08-03 23:59:22,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 2988 [2023-08-03 23:59:24,463 INFO L134 LiptonReduction]: Checked pairs total: 6717 [2023-08-03 23:59:24,464 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-03 23:59:24,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:59:24,466 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;@63bebf32, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:59:24,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:59:24,471 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:59:24,471 INFO L124 PetriNetUnfolderBase]: 0/55 cut-off events. [2023-08-03 23:59:24,471 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:59:24,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:24,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:24,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:59:24,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:24,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1320135254, now seen corresponding path program 1 times [2023-08-03 23:59:24,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:24,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887237133] [2023-08-03 23:59:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:24,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:59:24,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:24,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887237133] [2023-08-03 23:59:24,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887237133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:24,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:59:24,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:59:24,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215132526] [2023-08-03 23:59:24,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:24,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:59:24,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:24,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:59:24,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:59:24,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 193 [2023-08-03 23:59:24,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:24,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:24,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 193 [2023-08-03 23:59:24,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:26,355 INFO L124 PetriNetUnfolderBase]: 12844/19670 cut-off events. [2023-08-03 23:59:26,356 INFO L125 PetriNetUnfolderBase]: For 1812/1812 co-relation queries the response was YES. [2023-08-03 23:59:26,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39357 conditions, 19670 events. 12844/19670 cut-off events. For 1812/1812 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 138301 event pairs, 9918 based on Foata normal form. 0/19433 useless extension candidates. Maximal degree in co-relation 11953. Up to 17234 conditions per place. [2023-08-03 23:59:26,514 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 28 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-03 23:59:26,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 180 flow [2023-08-03 23:59:26,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:59:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:59:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-08-03 23:59:26,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6286701208981001 [2023-08-03 23:59:26,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-08-03 23:59:26,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-08-03 23:59:26,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:26,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-08-03 23:59:26,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:26,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:26,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:26,541 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 112 flow. Second operand 3 states and 364 transitions. [2023-08-03 23:59:26,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 180 flow [2023-08-03 23:59:26,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 174 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:59:26,553 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 118 flow [2023-08-03 23:59:26,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-03 23:59:26,559 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-03 23:59:26,560 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 118 flow [2023-08-03 23:59:26,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:26,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:26,567 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:59:26,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:59:26,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:59:26,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1694728039, now seen corresponding path program 1 times [2023-08-03 23:59:26,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:26,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730520716] [2023-08-03 23:59:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:26,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:59:26,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:26,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730520716] [2023-08-03 23:59:26,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730520716] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:26,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662862087] [2023-08-03 23:59:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:26,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:26,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:26,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:26,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:59:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:26,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:59:26,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:59:26,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:59:26,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662862087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:26,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:59:26,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:59:26,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101475029] [2023-08-03 23:59:26,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:26,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:26,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:26,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:59:26,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-03 23:59:26,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:26,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:26,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-03 23:59:26,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:28,382 INFO L124 PetriNetUnfolderBase]: 12832/19625 cut-off events. [2023-08-03 23:59:28,383 INFO L125 PetriNetUnfolderBase]: For 1479/1479 co-relation queries the response was YES. [2023-08-03 23:59:28,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39027 conditions, 19625 events. 12832/19625 cut-off events. For 1479/1479 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 137615 event pairs, 7728 based on Foata normal form. 9/19442 useless extension candidates. Maximal degree in co-relation 13971. Up to 17187 conditions per place. [2023-08-03 23:59:28,490 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 31 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-03 23:59:28,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 202 flow [2023-08-03 23:59:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:59:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:59:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2023-08-03 23:59:28,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6072538860103627 [2023-08-03 23:59:28,494 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2023-08-03 23:59:28,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2023-08-03 23:59:28,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:28,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2023-08-03 23:59:28,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:28,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:28,499 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:28,499 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 118 flow. Second operand 5 states and 586 transitions. [2023-08-03 23:59:28,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 202 flow [2023-08-03 23:59:28,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 46 transitions, 199 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:59:28,501 INFO L231 Difference]: Finished difference. Result has 57 places, 39 transitions, 132 flow [2023-08-03 23:59:28,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=57, PETRI_TRANSITIONS=39} [2023-08-03 23:59:28,502 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-03 23:59:28,502 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 39 transitions, 132 flow [2023-08-03 23:59:28,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:28,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:28,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:28,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:59:28,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:28,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:59:28,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:28,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1224228292, now seen corresponding path program 1 times [2023-08-03 23:59:28,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:28,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859531935] [2023-08-03 23:59:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:59:28,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:28,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859531935] [2023-08-03 23:59:28,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859531935] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:28,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284622503] [2023-08-03 23:59:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:28,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:28,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:28,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:28,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:59:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:28,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:59:28,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:59:28,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:59:28,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284622503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:28,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:59:28,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:59:28,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398616953] [2023-08-03 23:59:28,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:28,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:59:28,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:28,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:59:28,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:28,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 193 [2023-08-03 23:59:28,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 39 transitions, 132 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) [2023-08-03 23:59:28,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:28,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 193 [2023-08-03 23:59:28,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:30,013 INFO L124 PetriNetUnfolderBase]: 12242/18740 cut-off events. [2023-08-03 23:59:30,013 INFO L125 PetriNetUnfolderBase]: For 1366/1366 co-relation queries the response was YES. [2023-08-03 23:59:30,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37339 conditions, 18740 events. 12242/18740 cut-off events. For 1366/1366 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 130893 event pairs, 9508 based on Foata normal form. 0/18512 useless extension candidates. Maximal degree in co-relation 11408. Up to 16198 conditions per place. [2023-08-03 23:59:30,115 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 33 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-08-03 23:59:30,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 220 flow [2023-08-03 23:59:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:59:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:59:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-03 23:59:30,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355785837651122 [2023-08-03 23:59:30,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-03 23:59:30,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-03 23:59:30,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:30,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-03 23:59:30,119 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) [2023-08-03 23:59:30,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:30,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:30,121 INFO L175 Difference]: Start difference. First operand has 57 places, 39 transitions, 132 flow. Second operand 3 states and 368 transitions. [2023-08-03 23:59:30,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 220 flow [2023-08-03 23:59:30,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 213 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:59:30,124 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 140 flow [2023-08-03 23:59:30,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-08-03 23:59:30,130 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-03 23:59:30,130 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 140 flow [2023-08-03 23:59:30,132 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) [2023-08-03 23:59:30,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:30,132 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:30,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:30,337 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,SelfDestructingSolverStorable3 [2023-08-03 23:59:30,337 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:59:30,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:30,338 INFO L85 PathProgramCache]: Analyzing trace with hash -597644740, now seen corresponding path program 1 times [2023-08-03 23:59:30,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:30,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473159487] [2023-08-03 23:59:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:30,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:59:30,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:30,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473159487] [2023-08-03 23:59:30,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473159487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:30,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510687229] [2023-08-03 23:59:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:30,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:30,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:30,414 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:30,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:59:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:30,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:59:30,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:59:30,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:59:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:59:30,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510687229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:59:30,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:59:30,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:59:30,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263046922] [2023-08-03 23:59:30,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:59:30,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:30,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:30,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:30,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:30,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-03 23:59:30,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:30,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:30,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-03 23:59:30,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:31,577 INFO L124 PetriNetUnfolderBase]: 9694/14591 cut-off events. [2023-08-03 23:59:31,577 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-08-03 23:59:31,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29316 conditions, 14591 events. 9694/14591 cut-off events. For 1233/1233 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 95670 event pairs, 5616 based on Foata normal form. 3/14504 useless extension candidates. Maximal degree in co-relation 10429. Up to 12736 conditions per place. [2023-08-03 23:59:31,646 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 32 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-03 23:59:31,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 46 transitions, 217 flow [2023-08-03 23:59:31,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:59:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:59:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-03 23:59:31,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6152849740932642 [2023-08-03 23:59:31,648 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-03 23:59:31,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-03 23:59:31,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:31,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-03 23:59:31,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:31,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:31,652 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:31,652 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 140 flow. Second operand 4 states and 475 transitions. [2023-08-03 23:59:31,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 46 transitions, 217 flow [2023-08-03 23:59:31,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 46 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:59:31,654 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 135 flow [2023-08-03 23:59:31,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-03 23:59:31,655 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-03 23:59:31,655 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 135 flow [2023-08-03 23:59:31,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:31,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:31,655 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:31,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:31,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:31,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:59:31,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:31,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1161656511, now seen corresponding path program 1 times [2023-08-03 23:59:31,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:31,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752239527] [2023-08-03 23:59:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:31,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:59:31,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:31,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752239527] [2023-08-03 23:59:31,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752239527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:31,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387159772] [2023-08-03 23:59:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:31,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:31,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:31,958 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:31,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:59:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:32,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:59:32,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:59:32,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:59:32,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387159772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:32,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:59:32,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:59:32,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39266841] [2023-08-03 23:59:32,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:32,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:32,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:32,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:32,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:59:32,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-03 23:59:32,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:32,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:32,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-03 23:59:32,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:32,906 INFO L124 PetriNetUnfolderBase]: 9478/14173 cut-off events. [2023-08-03 23:59:32,906 INFO L125 PetriNetUnfolderBase]: For 1006/1006 co-relation queries the response was YES. [2023-08-03 23:59:32,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28560 conditions, 14173 events. 9478/14173 cut-off events. For 1006/1006 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 91644 event pairs, 2182 based on Foata normal form. 81/14245 useless extension candidates. Maximal degree in co-relation 10157. Up to 11907 conditions per place. [2023-08-03 23:59:33,166 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 44 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-08-03 23:59:33,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 269 flow [2023-08-03 23:59:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:59:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:59:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 598 transitions. [2023-08-03 23:59:33,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196891191709845 [2023-08-03 23:59:33,175 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 598 transitions. [2023-08-03 23:59:33,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 598 transitions. [2023-08-03 23:59:33,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:33,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 598 transitions. [2023-08-03 23:59:33,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:33,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:33,198 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:33,198 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 135 flow. Second operand 5 states and 598 transitions. [2023-08-03 23:59:33,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 269 flow [2023-08-03 23:59:33,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 262 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:59:33,202 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 145 flow [2023-08-03 23:59:33,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2023-08-03 23:59:33,205 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-08-03 23:59:33,205 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 145 flow [2023-08-03 23:59:33,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:33,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:33,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:33,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:33,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:33,411 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:59:33,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:33,412 INFO L85 PathProgramCache]: Analyzing trace with hash -274300245, now seen corresponding path program 1 times [2023-08-03 23:59:33,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:33,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296704424] [2023-08-03 23:59:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:33,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:59:33,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:33,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296704424] [2023-08-03 23:59:33,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296704424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:33,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730811556] [2023-08-03 23:59:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:33,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:33,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:33,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:33,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:59:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:33,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:59:33,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:59:33,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:59:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:59:33,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730811556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:59:33,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:59:33,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:59:33,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450254417] [2023-08-03 23:59:33,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:59:33,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:33,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:33,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:33,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 193 [2023-08-03 23:59:33,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:33,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:33,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 193 [2023-08-03 23:59:33,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:34,502 INFO L124 PetriNetUnfolderBase]: 7588/11203 cut-off events. [2023-08-03 23:59:34,502 INFO L125 PetriNetUnfolderBase]: For 1324/1324 co-relation queries the response was YES. [2023-08-03 23:59:34,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22923 conditions, 11203 events. 7588/11203 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 69038 event pairs, 4450 based on Foata normal form. 27/11221 useless extension candidates. Maximal degree in co-relation 8129. Up to 9394 conditions per place. [2023-08-03 23:59:34,537 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 40 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-03 23:59:34,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 255 flow [2023-08-03 23:59:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:59:34,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:59:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 483 transitions. [2023-08-03 23:59:34,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6256476683937824 [2023-08-03 23:59:34,539 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 483 transitions. [2023-08-03 23:59:34,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 483 transitions. [2023-08-03 23:59:34,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:34,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 483 transitions. [2023-08-03 23:59:34,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:34,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:34,542 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:34,542 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 145 flow. Second operand 4 states and 483 transitions. [2023-08-03 23:59:34,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 255 flow [2023-08-03 23:59:34,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 250 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:59:34,544 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 138 flow [2023-08-03 23:59:34,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2023-08-03 23:59:34,545 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-03 23:59:34,545 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 138 flow [2023-08-03 23:59:34,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:34,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:34,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:34,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:34,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:34,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:59:34,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:34,749 INFO L85 PathProgramCache]: Analyzing trace with hash 143095446, now seen corresponding path program 1 times [2023-08-03 23:59:34,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:34,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060622528] [2023-08-03 23:59:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:34,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:59:34,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:34,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060622528] [2023-08-03 23:59:34,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060622528] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:34,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038425686] [2023-08-03 23:59:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:34,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:34,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:34,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:34,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:59:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:34,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:59:34,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:59:34,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:59:34,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038425686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:34,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:59:34,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:59:34,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533068966] [2023-08-03 23:59:34,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:34,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:59:34,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:59:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:34,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 193 [2023-08-03 23:59:34,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:34,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:34,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 193 [2023-08-03 23:59:34,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:35,367 INFO L124 PetriNetUnfolderBase]: 4672/7036 cut-off events. [2023-08-03 23:59:35,368 INFO L125 PetriNetUnfolderBase]: For 1198/1198 co-relation queries the response was YES. [2023-08-03 23:59:35,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14895 conditions, 7036 events. 4672/7036 cut-off events. For 1198/1198 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 40776 event pairs, 568 based on Foata normal form. 729/7756 useless extension candidates. Maximal degree in co-relation 7349. Up to 4212 conditions per place. [2023-08-03 23:59:35,380 INFO L140 encePairwiseOnDemand]: 191/193 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-03 23:59:35,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 262 flow [2023-08-03 23:59:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:59:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:59:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-03 23:59:35,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.633419689119171 [2023-08-03 23:59:35,382 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-03 23:59:35,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-03 23:59:35,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:35,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-03 23:59:35,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:35,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:35,384 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:35,384 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 138 flow. Second operand 4 states and 489 transitions. [2023-08-03 23:59:35,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 262 flow [2023-08-03 23:59:35,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 255 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:59:35,401 INFO L231 Difference]: Finished difference. Result has 60 places, 0 transitions, 0 flow [2023-08-03 23:59:35,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=60, PETRI_TRANSITIONS=0} [2023-08-03 23:59:35,402 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-03 23:59:35,402 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 0 transitions, 0 flow [2023-08-03 23:59:35,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:35,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:59:35,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:59:35,402 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:59:35,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:35,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:35,603 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:35,603 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:59:35,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 127 transitions, 290 flow [2023-08-03 23:59:35,675 INFO L124 PetriNetUnfolderBase]: 93/1304 cut-off events. [2023-08-03 23:59:35,675 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:59:35,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 1304 events. 93/1304 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8852 event pairs, 0 based on Foata normal form. 0/1145 useless extension candidates. Maximal degree in co-relation 945. Up to 54 conditions per place. [2023-08-03 23:59:35,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 127 transitions, 290 flow [2023-08-03 23:59:35,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 112 transitions, 248 flow [2023-08-03 23:59:35,681 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:59:35,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 112 transitions, 248 flow [2023-08-03 23:59:35,681 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 112 transitions, 248 flow [2023-08-03 23:59:35,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 112 transitions, 248 flow [2023-08-03 23:59:35,736 INFO L124 PetriNetUnfolderBase]: 66/967 cut-off events. [2023-08-03 23:59:35,736 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-03 23:59:35,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 967 events. 66/967 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5981 event pairs, 0 based on Foata normal form. 0/862 useless extension candidates. Maximal degree in co-relation 717. Up to 54 conditions per place. [2023-08-03 23:59:35,753 INFO L119 LiptonReduction]: Number of co-enabled transitions 3996 [2023-08-03 23:59:37,464 INFO L134 LiptonReduction]: Checked pairs total: 8165 [2023-08-03 23:59:37,465 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-03 23:59:37,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:59:37,466 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;@63bebf32, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:59:37,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 23:59:37,468 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:59:37,468 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-03 23:59:37,468 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:59:37,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:37,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 23:59:37,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:37,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:37,469 INFO L85 PathProgramCache]: Analyzing trace with hash 623716530, now seen corresponding path program 1 times [2023-08-03 23:59:37,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:37,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549097781] [2023-08-03 23:59:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:37,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:59:37,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:37,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549097781] [2023-08-03 23:59:37,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549097781] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:37,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:59:37,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:59:37,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334753840] [2023-08-03 23:59:37,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:37,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:59:37,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:59:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:59:37,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-03 23:59:37,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:37,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:37,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-03 23:59:37,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:40,134 INFO L124 PetriNetUnfolderBase]: 33046/47771 cut-off events. [2023-08-03 23:59:40,135 INFO L125 PetriNetUnfolderBase]: For 1425/1425 co-relation queries the response was YES. [2023-08-03 23:59:40,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93162 conditions, 47771 events. 33046/47771 cut-off events. For 1425/1425 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 334595 event pairs, 26064 based on Foata normal form. 0/45422 useless extension candidates. Maximal degree in co-relation 26554. Up to 43520 conditions per place. [2023-08-03 23:59:40,336 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 31 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-03 23:59:40,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 174 flow [2023-08-03 23:59:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:59:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:59:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-03 23:59:40,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841269841269842 [2023-08-03 23:59:40,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-03 23:59:40,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-03 23:59:40,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:40,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-03 23:59:40,338 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) [2023-08-03 23:59:40,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:40,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:40,340 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 102 flow. Second operand 3 states and 368 transitions. [2023-08-03 23:59:40,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 174 flow [2023-08-03 23:59:40,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:59:40,341 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 112 flow [2023-08-03 23:59:40,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-03 23:59:40,342 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-03 23:59:40,342 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 112 flow [2023-08-03 23:59:40,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:40,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:40,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:40,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:59:40,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:40,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:40,343 INFO L85 PathProgramCache]: Analyzing trace with hash 190612037, now seen corresponding path program 1 times [2023-08-03 23:59:40,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:40,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427969637] [2023-08-03 23:59:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:40,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:59:40,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:40,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427969637] [2023-08-03 23:59:40,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427969637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:40,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453855173] [2023-08-03 23:59:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:40,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:40,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:40,397 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:40,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 23:59:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:40,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:59:40,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:59:40,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:59:40,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453855173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:40,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:59:40,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:59:40,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943914993] [2023-08-03 23:59:40,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:40,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:59:40,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:40,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:59:40,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:40,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-03 23:59:40,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:40,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:40,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-03 23:59:40,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:43,109 INFO L124 PetriNetUnfolderBase]: 31406/44873 cut-off events. [2023-08-03 23:59:43,110 INFO L125 PetriNetUnfolderBase]: For 1143/1143 co-relation queries the response was YES. [2023-08-03 23:59:43,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87754 conditions, 44873 events. 31406/44873 cut-off events. For 1143/1143 co-relation queries the response was YES. Maximal size of possible extension queue 1588. Compared 307341 event pairs, 24928 based on Foata normal form. 0/42773 useless extension candidates. Maximal degree in co-relation 87717. Up to 40987 conditions per place. [2023-08-03 23:59:43,292 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 36 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-03 23:59:43,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 204 flow [2023-08-03 23:59:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:59:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:59:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-03 23:59:43,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2023-08-03 23:59:43,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-03 23:59:43,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-03 23:59:43,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:43,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-03 23:59:43,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:43,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:43,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:43,296 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 112 flow. Second operand 3 states and 371 transitions. [2023-08-03 23:59:43,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 204 flow [2023-08-03 23:59:43,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:59:43,297 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 122 flow [2023-08-03 23:59:43,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-03 23:59:43,298 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-03 23:59:43,298 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 122 flow [2023-08-03 23:59:43,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:43,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:43,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:43,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 23:59:43,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:43,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:43,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:43,504 INFO L85 PathProgramCache]: Analyzing trace with hash 276593375, now seen corresponding path program 1 times [2023-08-03 23:59:43,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:43,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409423631] [2023-08-03 23:59:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:43,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:59:43,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:43,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409423631] [2023-08-03 23:59:43,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409423631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:43,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670070782] [2023-08-03 23:59:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:43,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:43,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:43,542 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:43,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 23:59:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:43,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:59:43,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:43,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:59:43,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670070782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:43,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:59:43,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:59:43,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117032600] [2023-08-03 23:59:43,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:43,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:59:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:59:43,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:43,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-03 23:59:43,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:43,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:43,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-03 23:59:43,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:46,293 INFO L124 PetriNetUnfolderBase]: 30734/43358 cut-off events. [2023-08-03 23:59:46,294 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-03 23:59:46,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85613 conditions, 43358 events. 30734/43358 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 290758 event pairs, 23582 based on Foata normal form. 0/41615 useless extension candidates. Maximal degree in co-relation 24344. Up to 37757 conditions per place. [2023-08-03 23:59:46,474 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 41 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-03 23:59:46,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 232 flow [2023-08-03 23:59:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:59:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:59:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-03 23:59:46,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2023-08-03 23:59:46,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-03 23:59:46,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-03 23:59:46,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:46,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-03 23:59:46,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:46,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:46,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:46,477 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 122 flow. Second operand 3 states and 375 transitions. [2023-08-03 23:59:46,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 232 flow [2023-08-03 23:59:46,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:59:46,479 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 132 flow [2023-08-03 23:59:46,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-03 23:59:46,480 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-03 23:59:46,480 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 132 flow [2023-08-03 23:59:46,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:46,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:46,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:46,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:46,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-03 23:59:46,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:46,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:46,681 INFO L85 PathProgramCache]: Analyzing trace with hash 210262677, now seen corresponding path program 1 times [2023-08-03 23:59:46,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:46,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366989874] [2023-08-03 23:59:46,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:46,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:46,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:46,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366989874] [2023-08-03 23:59:46,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366989874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:46,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378522980] [2023-08-03 23:59:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:46,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:46,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:46,723 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:46,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 23:59:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:46,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:59:46,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:46,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:59:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:46,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378522980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:59:46,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:59:46,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:59:46,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253193701] [2023-08-03 23:59:46,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:59:46,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:46,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:46,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:46,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:46,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-03 23:59:46,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:46,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:46,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-03 23:59:46,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:48,790 INFO L124 PetriNetUnfolderBase]: 24232/33893 cut-off events. [2023-08-03 23:59:48,791 INFO L125 PetriNetUnfolderBase]: For 3624/3624 co-relation queries the response was YES. [2023-08-03 23:59:48,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69782 conditions, 33893 events. 24232/33893 cut-off events. For 3624/3624 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 214196 event pairs, 14820 based on Foata normal form. 3/33860 useless extension candidates. Maximal degree in co-relation 24810. Up to 31258 conditions per place. [2023-08-03 23:59:48,937 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 36 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-03 23:59:48,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 228 flow [2023-08-03 23:59:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:59:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:59:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2023-08-03 23:59:48,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5702380952380952 [2023-08-03 23:59:48,939 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2023-08-03 23:59:48,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2023-08-03 23:59:48,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:48,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2023-08-03 23:59:48,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:48,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:48,943 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:48,943 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 132 flow. Second operand 4 states and 479 transitions. [2023-08-03 23:59:48,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 228 flow [2023-08-03 23:59:48,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:59:48,947 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 144 flow [2023-08-03 23:59:48,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-03 23:59:48,948 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-03 23:59:48,948 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 144 flow [2023-08-03 23:59:48,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:48,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:48,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:48,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-03 23:59:49,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:49,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:49,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:49,153 INFO L85 PathProgramCache]: Analyzing trace with hash 9591273, now seen corresponding path program 1 times [2023-08-03 23:59:49,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:49,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770447723] [2023-08-03 23:59:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:49,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 23:59:49,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:49,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770447723] [2023-08-03 23:59:49,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770447723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:49,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930050508] [2023-08-03 23:59:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:49,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:49,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:49,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:49,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 23:59:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:49,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:59:49,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 23:59:49,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:59:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 23:59:49,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930050508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:59:49,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:59:49,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:59:49,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500886332] [2023-08-03 23:59:49,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:59:49,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:49,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:49,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:49,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:49,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-03 23:59:49,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:49,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:49,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-03 23:59:49,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:51,014 INFO L124 PetriNetUnfolderBase]: 19198/26485 cut-off events. [2023-08-03 23:59:51,014 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-03 23:59:51,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54371 conditions, 26485 events. 19198/26485 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 160229 event pairs, 11902 based on Foata normal form. 27/26503 useless extension candidates. Maximal degree in co-relation 19295. Up to 23785 conditions per place. [2023-08-03 23:59:51,135 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 44 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-03 23:59:51,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 272 flow [2023-08-03 23:59:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:59:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:59:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2023-08-03 23:59:51,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797619047619048 [2023-08-03 23:59:51,137 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2023-08-03 23:59:51,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2023-08-03 23:59:51,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:51,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2023-08-03 23:59:51,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:51,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:51,140 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:51,140 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 144 flow. Second operand 4 states and 487 transitions. [2023-08-03 23:59:51,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 272 flow [2023-08-03 23:59:51,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 265 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 23:59:51,144 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 151 flow [2023-08-03 23:59:51,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2023-08-03 23:59:51,145 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-08-03 23:59:51,145 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 151 flow [2023-08-03 23:59:51,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:51,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:51,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:51,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:51,350 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 [2023-08-03 23:59:51,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:51,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:51,350 INFO L85 PathProgramCache]: Analyzing trace with hash -919158878, now seen corresponding path program 1 times [2023-08-03 23:59:51,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:51,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670563437] [2023-08-03 23:59:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:51,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:59:51,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:51,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670563437] [2023-08-03 23:59:51,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670563437] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:51,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375052692] [2023-08-03 23:59:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:51,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:51,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:51,394 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:51,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 23:59:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:51,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:59:51,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:59:51,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:59:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:59:51,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375052692] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:59:51,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:59:51,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:59:51,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463480092] [2023-08-03 23:59:51,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:59:51,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:51,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:51,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:51,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:51,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-03 23:59:51,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:51,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:51,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-03 23:59:51,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:52,922 INFO L124 PetriNetUnfolderBase]: 17362/23209 cut-off events. [2023-08-03 23:59:52,922 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-03 23:59:52,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48754 conditions, 23209 events. 17362/23209 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 128338 event pairs, 6886 based on Foata normal form. 243/23443 useless extension candidates. Maximal degree in co-relation 17297. Up to 11794 conditions per place. [2023-08-03 23:59:53,020 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 52 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-03 23:59:53,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 311 flow [2023-08-03 23:59:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:59:53,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:59:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 495 transitions. [2023-08-03 23:59:53,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2023-08-03 23:59:53,023 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 495 transitions. [2023-08-03 23:59:53,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 495 transitions. [2023-08-03 23:59:53,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:53,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 495 transitions. [2023-08-03 23:59:53,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:53,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:53,026 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:53,026 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 151 flow. Second operand 4 states and 495 transitions. [2023-08-03 23:59:53,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 311 flow [2023-08-03 23:59:53,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 304 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 23:59:53,030 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 158 flow [2023-08-03 23:59:53,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2023-08-03 23:59:53,030 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-03 23:59:53,030 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 158 flow [2023-08-03 23:59:53,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:53,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:53,031 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:53,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-03 23:59:53,235 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 [2023-08-03 23:59:53,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:53,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1588945575, now seen corresponding path program 1 times [2023-08-03 23:59:53,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:53,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490752970] [2023-08-03 23:59:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:53,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 23:59:53,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:53,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490752970] [2023-08-03 23:59:53,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490752970] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:53,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:59:53,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 23:59:53,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281730629] [2023-08-03 23:59:53,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:53,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:59:53,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:59:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:59:53,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-03 23:59:53,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:53,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:53,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-03 23:59:53,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:56,653 INFO L124 PetriNetUnfolderBase]: 44968/56647 cut-off events. [2023-08-03 23:59:56,654 INFO L125 PetriNetUnfolderBase]: For 28375/28375 co-relation queries the response was YES. [2023-08-03 23:59:56,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129742 conditions, 56647 events. 44968/56647 cut-off events. For 28375/28375 co-relation queries the response was YES. Maximal size of possible extension queue 1956. Compared 292982 event pairs, 11614 based on Foata normal form. 144/56755 useless extension candidates. Maximal degree in co-relation 45783. Up to 53209 conditions per place. [2023-08-03 23:59:56,961 INFO L140 encePairwiseOnDemand]: 204/210 looper letters, 54 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2023-08-03 23:59:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 369 flow [2023-08-03 23:59:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:59:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:59:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-03 23:59:56,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2023-08-03 23:59:56,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-03 23:59:56,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-03 23:59:56,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:56,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-03 23:59:56,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:56,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:56,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:56,965 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 158 flow. Second operand 3 states and 385 transitions. [2023-08-03 23:59:56,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 369 flow [2023-08-03 23:59:56,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 355 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 23:59:56,982 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 184 flow [2023-08-03 23:59:56,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-03 23:59:56,983 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-03 23:59:56,983 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 184 flow [2023-08-03 23:59:56,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:56,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:56,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-03 23:59:56,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:56,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash -799387058, now seen corresponding path program 1 times [2023-08-03 23:59:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206698338] [2023-08-03 23:59:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 23:59:57,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:57,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206698338] [2023-08-03 23:59:57,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206698338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:57,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:59:57,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:59:57,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130715801] [2023-08-03 23:59:57,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:57,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:59:57,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:57,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:59:57,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:59:57,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-03 23:59:57,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:57,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:57,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-03 23:59:57,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:01,993 INFO L124 PetriNetUnfolderBase]: 63148/80515 cut-off events. [2023-08-04 00:00:01,994 INFO L125 PetriNetUnfolderBase]: For 34549/34549 co-relation queries the response was YES. [2023-08-04 00:00:02,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194345 conditions, 80515 events. 63148/80515 cut-off events. For 34549/34549 co-relation queries the response was YES. Maximal size of possible extension queue 3015. Compared 458418 event pairs, 26950 based on Foata normal form. 1728/82207 useless extension candidates. Maximal degree in co-relation 68517. Up to 41020 conditions per place. [2023-08-04 00:00:02,446 INFO L140 encePairwiseOnDemand]: 205/210 looper letters, 61 selfloop transitions, 6 changer transitions 0/72 dead transitions. [2023-08-04 00:00:02,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 420 flow [2023-08-04 00:00:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:00:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:00:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-04 00:00:02,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6174603174603175 [2023-08-04 00:00:02,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-04 00:00:02,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-04 00:00:02,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:02,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-04 00:00:02,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:02,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:02,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:02,450 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 184 flow. Second operand 3 states and 389 transitions. [2023-08-04 00:00:02,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 420 flow [2023-08-04 00:00:02,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 72 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:00:02,482 INFO L231 Difference]: Finished difference. Result has 69 places, 49 transitions, 229 flow [2023-08-04 00:00:02,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2023-08-04 00:00:02,483 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-04 00:00:02,483 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 229 flow [2023-08-04 00:00:02,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:02,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:02,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:02,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 00:00:02,484 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:00:02,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1283573684, now seen corresponding path program 1 times [2023-08-04 00:00:02,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:02,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077388538] [2023-08-04 00:00:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:02,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:00:02,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:02,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077388538] [2023-08-04 00:00:02,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077388538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:00:02,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077104007] [2023-08-04 00:00:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:02,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:02,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:00:02,616 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:00:02,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 00:00:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:02,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 00:00:02,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:00:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:00:02,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:00:02,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077104007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:00:02,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:00:02,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 00:00:02,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547604967] [2023-08-04 00:00:02,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:00:02,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:00:02,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:02,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:00:02,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:00:02,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 210 [2023-08-04 00:00:02,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 229 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 00:00:02,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:02,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 210 [2023-08-04 00:00:02,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:05,712 INFO L124 PetriNetUnfolderBase]: 31101/41623 cut-off events. [2023-08-04 00:00:05,712 INFO L125 PetriNetUnfolderBase]: For 17679/22374 co-relation queries the response was YES. [2023-08-04 00:00:05,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98772 conditions, 41623 events. 31101/41623 cut-off events. For 17679/22374 co-relation queries the response was YES. Maximal size of possible extension queue 2217. Compared 246919 event pairs, 7465 based on Foata normal form. 175/39394 useless extension candidates. Maximal degree in co-relation 64132. Up to 38206 conditions per place. [2023-08-04 00:00:06,028 INFO L140 encePairwiseOnDemand]: 202/210 looper letters, 53 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2023-08-04 00:00:06,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 77 transitions, 464 flow [2023-08-04 00:00:06,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:00:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:00:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-04 00:00:06,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6015873015873016 [2023-08-04 00:00:06,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-04 00:00:06,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-04 00:00:06,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:06,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-04 00:00:06,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:06,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:06,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:06,032 INFO L175 Difference]: Start difference. First operand has 69 places, 49 transitions, 229 flow. Second operand 3 states and 379 transitions. [2023-08-04 00:00:06,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 77 transitions, 464 flow [2023-08-04 00:00:06,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 77 transitions, 444 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-04 00:00:06,078 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 256 flow [2023-08-04 00:00:06,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2023-08-04 00:00:06,079 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2023-08-04 00:00:06,079 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 256 flow [2023-08-04 00:00:06,079 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 00:00:06,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:06,080 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:06,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 00:00:06,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 00:00:06,285 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:00:06,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1136106810, now seen corresponding path program 1 times [2023-08-04 00:00:06,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:06,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035868644] [2023-08-04 00:00:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:06,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:00:06,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:06,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035868644] [2023-08-04 00:00:06,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035868644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:00:06,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129683823] [2023-08-04 00:00:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:06,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:06,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:00:06,450 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:00:06,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 00:00:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:06,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 00:00:06,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:00:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:00:06,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:00:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:00:06,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129683823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:00:06,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:00:06,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 6 [2023-08-04 00:00:06,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482042681] [2023-08-04 00:00:06,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:00:06,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 00:00:06,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:06,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 00:00:06,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-04 00:00:06,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 210 [2023-08-04 00:00:06,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 256 flow. Second operand has 7 states, 7 states have (on average 102.57142857142857) internal successors, (718), 7 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:06,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:06,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 210 [2023-08-04 00:00:06,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:12,641 INFO L124 PetriNetUnfolderBase]: 63777/83569 cut-off events. [2023-08-04 00:00:12,641 INFO L125 PetriNetUnfolderBase]: For 78737/78737 co-relation queries the response was YES. [2023-08-04 00:00:12,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244043 conditions, 83569 events. 63777/83569 cut-off events. For 78737/78737 co-relation queries the response was YES. Maximal size of possible extension queue 3316. Compared 506339 event pairs, 1158 based on Foata normal form. 3768/87286 useless extension candidates. Maximal degree in co-relation 243957. Up to 31799 conditions per place. [2023-08-04 00:00:13,218 INFO L140 encePairwiseOnDemand]: 191/210 looper letters, 269 selfloop transitions, 125 changer transitions 4/403 dead transitions. [2023-08-04 00:00:13,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 403 transitions, 2632 flow [2023-08-04 00:00:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-04 00:00:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-04 00:00:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1527 transitions. [2023-08-04 00:00:13,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5593406593406594 [2023-08-04 00:00:13,222 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1527 transitions. [2023-08-04 00:00:13,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1527 transitions. [2023-08-04 00:00:13,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:13,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1527 transitions. [2023-08-04 00:00:13,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 117.46153846153847) internal successors, (1527), 13 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:13,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 210.0) internal successors, (2940), 14 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:13,230 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 210.0) internal successors, (2940), 14 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:13,230 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 256 flow. Second operand 13 states and 1527 transitions. [2023-08-04 00:00:13,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 403 transitions, 2632 flow [2023-08-04 00:00:13,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 403 transitions, 2615 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:00:13,288 INFO L231 Difference]: Finished difference. Result has 92 places, 189 transitions, 1430 flow [2023-08-04 00:00:13,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1430, PETRI_PLACES=92, PETRI_TRANSITIONS=189} [2023-08-04 00:00:13,289 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 41 predicate places. [2023-08-04 00:00:13,289 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 189 transitions, 1430 flow [2023-08-04 00:00:13,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.57142857142857) internal successors, (718), 7 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:13,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:13,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:13,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 00:00:13,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 00:00:13,490 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:00:13,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:13,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1762514422, now seen corresponding path program 1 times [2023-08-04 00:00:13,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:13,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859551771] [2023-08-04 00:00:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:13,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:00:13,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:13,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859551771] [2023-08-04 00:00:13,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859551771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:00:13,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398718797] [2023-08-04 00:00:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:13,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:13,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:00:13,933 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:00:13,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 00:00:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:14,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-04 00:00:14,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:00:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:00:14,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:00:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:00:14,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398718797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:00:14,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:00:14,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 5, 5] total 12 [2023-08-04 00:00:14,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760326780] [2023-08-04 00:00:14,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:00:14,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 00:00:14,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 00:00:14,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-04 00:00:14,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 210 [2023-08-04 00:00:14,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 189 transitions, 1430 flow. Second operand has 14 states, 14 states have (on average 99.14285714285714) internal successors, (1388), 14 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:14,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:14,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 210 [2023-08-04 00:00:14,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:26,378 INFO L124 PetriNetUnfolderBase]: 85525/112821 cut-off events. [2023-08-04 00:00:26,382 INFO L125 PetriNetUnfolderBase]: For 445388/445388 co-relation queries the response was YES. [2023-08-04 00:00:26,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549946 conditions, 112821 events. 85525/112821 cut-off events. For 445388/445388 co-relation queries the response was YES. Maximal size of possible extension queue 4572. Compared 711744 event pairs, 522 based on Foata normal form. 38/112842 useless extension candidates. Maximal degree in co-relation 523516. Up to 41844 conditions per place. [2023-08-04 00:00:27,436 INFO L140 encePairwiseOnDemand]: 191/210 looper letters, 575 selfloop transitions, 576 changer transitions 68/1224 dead transitions. [2023-08-04 00:00:27,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 1224 transitions, 12213 flow [2023-08-04 00:00:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-04 00:00:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-04 00:00:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3136 transitions. [2023-08-04 00:00:27,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5530864197530864 [2023-08-04 00:00:27,444 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3136 transitions. [2023-08-04 00:00:27,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3136 transitions. [2023-08-04 00:00:27,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:27,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3136 transitions. [2023-08-04 00:00:27,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 116.14814814814815) internal successors, (3136), 27 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:27,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 210.0) internal successors, (5880), 28 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:27,461 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 210.0) internal successors, (5880), 28 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:27,461 INFO L175 Difference]: Start difference. First operand has 92 places, 189 transitions, 1430 flow. Second operand 27 states and 3136 transitions. [2023-08-04 00:00:27,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 1224 transitions, 12213 flow [2023-08-04 00:00:34,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 1224 transitions, 11858 flow, removed 152 selfloop flow, removed 1 redundant places. [2023-08-04 00:00:34,295 INFO L231 Difference]: Finished difference. Result has 138 places, 744 transitions, 8434 flow [2023-08-04 00:00:34,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8434, PETRI_PLACES=138, PETRI_TRANSITIONS=744} [2023-08-04 00:00:34,295 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 87 predicate places. [2023-08-04 00:00:34,295 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 744 transitions, 8434 flow [2023-08-04 00:00:34,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 99.14285714285714) internal successors, (1388), 14 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:34,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:34,296 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:34,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 00:00:34,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:34,503 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:00:34,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash 399189040, now seen corresponding path program 1 times [2023-08-04 00:00:34,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:34,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336491769] [2023-08-04 00:00:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:34,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:00:34,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:34,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336491769] [2023-08-04 00:00:34,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336491769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:00:34,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263811] [2023-08-04 00:00:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:34,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:34,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:00:34,666 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:00:34,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 00:00:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:34,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 00:00:34,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:00:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:00:34,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:00:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:00:35,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:00:35,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:00:35,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 15 [2023-08-04 00:00:35,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80822079] [2023-08-04 00:00:35,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:00:35,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 00:00:35,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:35,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 00:00:35,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-08-04 00:00:35,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 210 [2023-08-04 00:00:35,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 744 transitions, 8434 flow. Second operand has 17 states, 17 states have (on average 98.58823529411765) internal successors, (1676), 17 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:35,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:35,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 210 [2023-08-04 00:00:35,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:02:19,651 INFO L124 PetriNetUnfolderBase]: 398556/530556 cut-off events. [2023-08-04 00:02:19,652 INFO L125 PetriNetUnfolderBase]: For 5201115/5201115 co-relation queries the response was YES. [2023-08-04 00:02:24,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3404973 conditions, 530556 events. 398556/530556 cut-off events. For 5201115/5201115 co-relation queries the response was YES. Maximal size of possible extension queue 27727. Compared 4110551 event pairs, 802 based on Foata normal form. 3671/534210 useless extension candidates. Maximal degree in co-relation 3337718. Up to 163146 conditions per place. [2023-08-04 00:02:27,213 INFO L140 encePairwiseOnDemand]: 191/210 looper letters, 2088 selfloop transitions, 3887 changer transitions 1969/7949 dead transitions. [2023-08-04 00:02:27,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 7949 transitions, 107722 flow [2023-08-04 00:02:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-04 00:02:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-04 00:02:27,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 7768 transitions. [2023-08-04 00:02:27,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439775910364145 [2023-08-04 00:02:27,225 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 7768 transitions. [2023-08-04 00:02:27,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 7768 transitions. [2023-08-04 00:02:27,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:02:27,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 7768 transitions. [2023-08-04 00:02:27,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 114.23529411764706) internal successors, (7768), 68 states have internal predecessors, (7768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:27,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 210.0) internal successors, (14490), 69 states have internal predecessors, (14490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:27,266 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 210.0) internal successors, (14490), 69 states have internal predecessors, (14490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:27,266 INFO L175 Difference]: Start difference. First operand has 138 places, 744 transitions, 8434 flow. Second operand 68 states and 7768 transitions. [2023-08-04 00:02:27,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 7949 transitions, 107722 flow