/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_safe007_power.oepc-thin001_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:15:23,920 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:15:23,986 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:15:23,992 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:15:23,992 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:15:23,993 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:15:23,993 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:15:24,022 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:15:24,022 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:15:24,026 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:15:24,027 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:15:24,027 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:15:24,028 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:15:24,029 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:15:24,029 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:15:24,030 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:15:24,030 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:15:24,030 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:15:24,030 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:15:24,031 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:15:24,031 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:15:24,031 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:15:24,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:15:24,032 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:15:24,032 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:15:24,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:15:24,032 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:15:24,033 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:15:24,033 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:15:24,033 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:15:24,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:15:24,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:15:24,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:15:24,034 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:15:24,034 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:15:24,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:15:24,035 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:15:24,035 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:15:24,035 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:15:24,035 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:15:24,035 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:15:24,036 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:15:24,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:15:24,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:15:24,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:15:24,333 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:15:24,333 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:15:24,334 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe007_power.oepc-thin001_power.oepc_bound2.i [2023-08-04 00:15:26,016 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:15:26,275 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:15:26,276 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe007_power.oepc-thin001_power.oepc_bound2.i [2023-08-04 00:15:26,293 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a46fe2b87/0797ba60d9964257be83d8ecd53a6a86/FLAGb612c42ec [2023-08-04 00:15:26,306 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a46fe2b87/0797ba60d9964257be83d8ecd53a6a86 [2023-08-04 00:15:26,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:15:26,310 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:15:26,310 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:15:26,311 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:15:26,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:15:26,314 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,314 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753f7b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26, skipping insertion in model container [2023-08-04 00:15:26,315 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,365 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:15:26,501 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_safe007_power.oepc-thin001_power.oepc_bound2.i[1014,1027] [2023-08-04 00:15:26,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:15:26,720 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:15:26,729 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_safe007_power.oepc-thin001_power.oepc_bound2.i[1014,1027] [2023-08-04 00:15:26,736 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:15:26,737 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:15:26,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:15:26,802 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:15:26,802 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:15:26,808 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:15:26,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26 WrapperNode [2023-08-04 00:15:26,809 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:15:26,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:15:26,809 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:15:26,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:15:26,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,849 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,873 INFO L138 Inliner]: procedures = 176, calls = 69, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 162 [2023-08-04 00:15:26,874 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:15:26,874 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:15:26,874 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:15:26,874 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:15:26,881 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,882 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,885 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,894 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,900 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,902 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,906 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:15:26,907 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:15:26,907 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:15:26,907 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:15:26,907 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (1/1) ... [2023-08-04 00:15:26,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:15:26,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:15:26,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:15:26,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:15:26,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:15:26,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:15:26,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:15:26,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:15:26,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:15:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:15:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:15:26,971 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:15:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:15:26,971 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:15:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:15:26,971 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:15:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:15:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:15:26,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:15:26,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:15:26,973 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:15:27,098 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:15:27,100 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:15:27,426 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:15:27,620 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:15:27,620 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:15:27,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:15:27 BoogieIcfgContainer [2023-08-04 00:15:27,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:15:27,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:15:27,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:15:27,630 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:15:27,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:15:26" (1/3) ... [2023-08-04 00:15:27,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7270a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:15:27, skipping insertion in model container [2023-08-04 00:15:27,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:15:26" (2/3) ... [2023-08-04 00:15:27,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7270a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:15:27, skipping insertion in model container [2023-08-04 00:15:27,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:15:27" (3/3) ... [2023-08-04 00:15:27,634 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe007_power.oepc-thin001_power.oepc_bound2.i [2023-08-04 00:15:27,642 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:15:27,649 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:15:27,649 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:15:27,649 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:15:27,725 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:15:27,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 00:15:27,910 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-04 00:15:27,910 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:15:27,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 464 events. 30/464 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1957 event pairs, 0 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-04 00:15:27,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 00:15:27,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 117 transitions, 249 flow [2023-08-04 00:15:27,926 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:15:27,934 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 00:15:27,937 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 00:15:27,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 117 transitions, 249 flow [2023-08-04 00:15:27,971 INFO L124 PetriNetUnfolderBase]: 6/232 cut-off events. [2023-08-04 00:15:27,972 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:15:27,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 232 events. 6/232 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 619 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-04 00:15:27,974 INFO L119 LiptonReduction]: Number of co-enabled transitions 1160 [2023-08-04 00:15:33,887 INFO L134 LiptonReduction]: Checked pairs total: 2918 [2023-08-04 00:15:33,887 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-04 00:15:33,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:15:33,916 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;@2926563d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:15:33,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:15:33,927 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:15:33,927 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 00:15:33,927 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:15:33,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:15:33,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:15:33,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:15:33,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:15:33,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1062883598, now seen corresponding path program 1 times [2023-08-04 00:15:33,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:15:33,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789520731] [2023-08-04 00:15:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:33,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:15:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:15:34,083 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:15:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:15:34,144 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:15:34,145 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:15:34,146 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:15:34,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:15:34,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:15:34,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:15:34,149 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:15:34,151 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:15:34,152 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:15:34,152 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:15:34,207 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:15:34,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:15:34,416 INFO L124 PetriNetUnfolderBase]: 93/1387 cut-off events. [2023-08-04 00:15:34,416 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:15:34,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 1387 events. 93/1387 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9388 event pairs, 0 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 1010. Up to 54 conditions per place. [2023-08-04 00:15:34,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:15:34,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 139 transitions, 314 flow [2023-08-04 00:15:34,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:15:34,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-04 00:15:34,431 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-04 00:15:34,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 139 transitions, 314 flow [2023-08-04 00:15:34,515 INFO L124 PetriNetUnfolderBase]: 12/604 cut-off events. [2023-08-04 00:15:34,515 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:15:34,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 604 events. 12/604 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2935 event pairs, 0 based on Foata normal form. 0/580 useless extension candidates. Maximal degree in co-relation 488. Up to 27 conditions per place. [2023-08-04 00:15:34,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 3152 [2023-08-04 00:15:41,866 INFO L134 LiptonReduction]: Checked pairs total: 10649 [2023-08-04 00:15:41,866 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-04 00:15:41,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:15:41,869 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2926563d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:15:41,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:15:41,877 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:15:41,877 INFO L124 PetriNetUnfolderBase]: 0/63 cut-off events. [2023-08-04 00:15:41,877 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:15:41,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:15:41,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:15:41,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:15:41,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:15:41,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1463100649, now seen corresponding path program 1 times [2023-08-04 00:15:41,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:15:41,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617124471] [2023-08-04 00:15:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:41,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:15:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:15:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:15:42,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:15:42,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617124471] [2023-08-04 00:15:42,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617124471] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:15:42,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:15:42,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:15:42,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106180785] [2023-08-04 00:15:42,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:15:42,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:15:42,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:15:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:15:42,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:15:42,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 272 [2023-08-04 00:15:42,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states 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 00:15:42,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:15:42,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 272 [2023-08-04 00:15:42,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:15:47,227 INFO L124 PetriNetUnfolderBase]: 21408/31012 cut-off events. [2023-08-04 00:15:47,228 INFO L125 PetriNetUnfolderBase]: For 2238/2238 co-relation queries the response was YES. [2023-08-04 00:15:47,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62227 conditions, 31012 events. 21408/31012 cut-off events. For 2238/2238 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 208359 event pairs, 16818 based on Foata normal form. 0/30417 useless extension candidates. Maximal degree in co-relation 17676. Up to 28294 conditions per place. [2023-08-04 00:15:47,460 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 30 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-04 00:15:47,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 188 flow [2023-08-04 00:15:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:15:47,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:15:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 00:15:47,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772058823529411 [2023-08-04 00:15:47,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 00:15:47,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 00:15:47,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:15:47,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 00:15:47,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:15:47,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states 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 00:15:47,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states 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 00:15:47,506 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 116 flow. Second operand 3 states and 471 transitions. [2023-08-04 00:15:47,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 188 flow [2023-08-04 00:15:47,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 44 transitions, 182 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:15:47,517 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 122 flow [2023-08-04 00:15:47,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=122, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-04 00:15:47,524 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-04 00:15:47,526 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 122 flow [2023-08-04 00:15:47,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states 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 00:15:47,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:15:47,532 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:15:47,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:15:47,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:15:47,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:15:47,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1892934000, now seen corresponding path program 1 times [2023-08-04 00:15:47,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:15:47,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682413221] [2023-08-04 00:15:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:47,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:15:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:15:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:15:47,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:15:47,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682413221] [2023-08-04 00:15:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682413221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:15:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873350721] [2023-08-04 00:15:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:47,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:15:47,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:15:47,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:15:47,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:15:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:15:47,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:15:47,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:15:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:15:47,847 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:15:47,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873350721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:15:47,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:15:47,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:15:47,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449482679] [2023-08-04 00:15:47,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:15:47,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:15:47,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:15:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:15:47,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:15:47,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 272 [2023-08-04 00:15:47,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states 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 00:15:47,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:15:47,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 272 [2023-08-04 00:15:47,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:15:52,628 INFO L124 PetriNetUnfolderBase]: 21396/30973 cut-off events. [2023-08-04 00:15:52,629 INFO L125 PetriNetUnfolderBase]: For 1947/1947 co-relation queries the response was YES. [2023-08-04 00:15:52,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61903 conditions, 30973 events. 21396/30973 cut-off events. For 1947/1947 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 209014 event pairs, 13380 based on Foata normal form. 9/30405 useless extension candidates. Maximal degree in co-relation 22151. Up to 28247 conditions per place. [2023-08-04 00:15:52,786 INFO L140 encePairwiseOnDemand]: 268/272 looper letters, 33 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-08-04 00:15:52,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 210 flow [2023-08-04 00:15:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:15:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:15:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 763 transitions. [2023-08-04 00:15:52,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610294117647059 [2023-08-04 00:15:52,789 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 763 transitions. [2023-08-04 00:15:52,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 763 transitions. [2023-08-04 00:15:52,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:15:52,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 763 transitions. [2023-08-04 00:15:52,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.6) internal successors, (763), 5 states have internal predecessors, (763), 0 states have call successors, (0), 0 states 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 00:15:52,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 00:15:52,796 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 00:15:52,796 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 122 flow. Second operand 5 states and 763 transitions. [2023-08-04 00:15:52,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 210 flow [2023-08-04 00:15:52,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 48 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:15:52,799 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 136 flow [2023-08-04 00:15:52,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-04 00:15:52,800 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2023-08-04 00:15:52,800 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 136 flow [2023-08-04 00:15:52,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states 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 00:15:52,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:15:52,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:15:52,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:15:53,013 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 [2023-08-04 00:15:53,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:15:53,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:15:53,014 INFO L85 PathProgramCache]: Analyzing trace with hash 721650858, now seen corresponding path program 1 times [2023-08-04 00:15:53,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:15:53,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522623465] [2023-08-04 00:15:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:53,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:15:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:15:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:15:53,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:15:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522623465] [2023-08-04 00:15:53,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522623465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:15:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407570925] [2023-08-04 00:15:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:53,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:15:53,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:15:53,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:15:53,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:15:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:15:53,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:15:53,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:15:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:15:53,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:15:53,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407570925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:15:53,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:15:53,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:15:53,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308841075] [2023-08-04 00:15:53,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:15:53,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:15:53,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:15:53,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:15:53,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:15:53,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 272 [2023-08-04 00:15:53,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 00:15:53,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:15:53,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 272 [2023-08-04 00:15:53,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:15:57,470 INFO L124 PetriNetUnfolderBase]: 20354/29156 cut-off events. [2023-08-04 00:15:57,470 INFO L125 PetriNetUnfolderBase]: For 1798/1798 co-relation queries the response was YES. [2023-08-04 00:15:57,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58603 conditions, 29156 events. 20354/29156 cut-off events. For 1798/1798 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 192527 event pairs, 16084 based on Foata normal form. 0/28615 useless extension candidates. Maximal degree in co-relation 16688. Up to 26614 conditions per place. [2023-08-04 00:15:57,617 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 35 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2023-08-04 00:15:57,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 228 flow [2023-08-04 00:15:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:15:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:15:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-04 00:15:57,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821078431372549 [2023-08-04 00:15:57,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-04 00:15:57,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-04 00:15:57,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:15:57,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-04 00:15:57,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 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) [2023-08-04 00:15:57,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states 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 00:15:57,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states 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 00:15:57,623 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 136 flow. Second operand 3 states and 475 transitions. [2023-08-04 00:15:57,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 228 flow [2023-08-04 00:15:57,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 49 transitions, 221 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:15:57,625 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 144 flow [2023-08-04 00:15:57,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-08-04 00:15:57,626 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2023-08-04 00:15:57,626 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 144 flow [2023-08-04 00:15:57,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 00:15:57,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:15:57,626 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:15:57,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 00:15:57,832 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 [2023-08-04 00:15:57,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:15:57,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:15:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1127841803, now seen corresponding path program 1 times [2023-08-04 00:15:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:15:57,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633908290] [2023-08-04 00:15:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:57,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:15:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:15:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:15:57,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:15:57,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633908290] [2023-08-04 00:15:57,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633908290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:15:57,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729627993] [2023-08-04 00:15:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:15:57,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:15:57,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:15:57,902 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:15:57,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:15:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:15:58,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:15:58,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:15:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:15:58,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:15:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:15:58,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729627993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:15:58,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:15:58,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:15:58,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363486553] [2023-08-04 00:15:58,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:15:58,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:15:58,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:15:58,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:15:58,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:15:58,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 272 [2023-08-04 00:15:58,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 00:15:58,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:15:58,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 272 [2023-08-04 00:15:58,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:01,578 INFO L124 PetriNetUnfolderBase]: 16066/22691 cut-off events. [2023-08-04 00:16:01,578 INFO L125 PetriNetUnfolderBase]: For 1557/1557 co-relation queries the response was YES. [2023-08-04 00:16:01,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45840 conditions, 22691 events. 16066/22691 cut-off events. For 1557/1557 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 141190 event pairs, 9684 based on Foata normal form. 3/22396 useless extension candidates. Maximal degree in co-relation 16321. Up to 20836 conditions per place. [2023-08-04 00:16:01,670 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 34 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-04 00:16:01,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 48 transitions, 225 flow [2023-08-04 00:16:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:16:01,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:16:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2023-08-04 00:16:01,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670955882352942 [2023-08-04 00:16:01,674 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2023-08-04 00:16:01,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2023-08-04 00:16:01,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:01,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2023-08-04 00:16:01,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:01,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states 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 00:16:01,679 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states 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 00:16:01,679 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 144 flow. Second operand 4 states and 617 transitions. [2023-08-04 00:16:01,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 48 transitions, 225 flow [2023-08-04 00:16:01,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 48 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:16:01,681 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 139 flow [2023-08-04 00:16:01,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=133, 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=139, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-04 00:16:01,682 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-04 00:16:01,682 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 139 flow [2023-08-04 00:16:01,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 00:16:01,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:01,683 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:01,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:16:01,889 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 [2023-08-04 00:16:01,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:16:01,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:01,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1208675157, now seen corresponding path program 1 times [2023-08-04 00:16:01,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:01,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008788629] [2023-08-04 00:16:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:01,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:16:02,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008788629] [2023-08-04 00:16:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008788629] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:16:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837918441] [2023-08-04 00:16:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:02,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:02,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:02,005 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:16:02,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:16:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:02,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:16:02,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:16:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:16:02,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:16:02,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837918441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:16:02,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:16:02,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:16:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474353858] [2023-08-04 00:16:02,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:16:02,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:16:02,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:02,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:16:02,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:16:02,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 272 [2023-08-04 00:16:02,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 00:16:02,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:02,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 272 [2023-08-04 00:16:02,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:05,465 INFO L124 PetriNetUnfolderBase]: 15850/22273 cut-off events. [2023-08-04 00:16:05,465 INFO L125 PetriNetUnfolderBase]: For 1330/1330 co-relation queries the response was YES. [2023-08-04 00:16:05,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45084 conditions, 22273 events. 15850/22273 cut-off events. For 1330/1330 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 137253 event pairs, 4234 based on Foata normal form. 81/22137 useless extension candidates. Maximal degree in co-relation 16049. Up to 20007 conditions per place. [2023-08-04 00:16:05,722 INFO L140 encePairwiseOnDemand]: 268/272 looper letters, 46 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-04 00:16:05,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 277 flow [2023-08-04 00:16:05,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:16:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:16:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 775 transitions. [2023-08-04 00:16:05,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698529411764706 [2023-08-04 00:16:05,724 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 775 transitions. [2023-08-04 00:16:05,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 775 transitions. [2023-08-04 00:16:05,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:05,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 775 transitions. [2023-08-04 00:16:05,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 00:16:05,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 00:16:05,730 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 00:16:05,730 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 139 flow. Second operand 5 states and 775 transitions. [2023-08-04 00:16:05,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 277 flow [2023-08-04 00:16:05,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:16:05,732 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 149 flow [2023-08-04 00:16:05,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=63, PETRI_TRANSITIONS=41} [2023-08-04 00:16:05,733 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2023-08-04 00:16:05,733 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 149 flow [2023-08-04 00:16:05,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 00:16:05,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:05,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:05,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:16:05,943 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 [2023-08-04 00:16:05,944 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:16:05,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1195618486, now seen corresponding path program 1 times [2023-08-04 00:16:05,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:05,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637911719] [2023-08-04 00:16:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:05,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:16:05,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:05,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637911719] [2023-08-04 00:16:05,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637911719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:16:05,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776542233] [2023-08-04 00:16:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:05,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:06,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:06,001 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:16:06,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:16:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:06,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:16:06,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:16:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:16:06,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:16:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:16:06,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776542233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:16:06,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:16:06,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:16:06,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899084670] [2023-08-04 00:16:06,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:16:06,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:16:06,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:06,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:16:06,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:16:06,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 272 [2023-08-04 00:16:06,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states 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 00:16:06,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:06,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 272 [2023-08-04 00:16:06,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:08,521 INFO L124 PetriNetUnfolderBase]: 12583/17494 cut-off events. [2023-08-04 00:16:08,521 INFO L125 PetriNetUnfolderBase]: For 1567/1567 co-relation queries the response was YES. [2023-08-04 00:16:08,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35748 conditions, 17494 events. 12583/17494 cut-off events. For 1567/1567 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 102966 event pairs, 7717 based on Foata normal form. 27/17358 useless extension candidates. Maximal degree in co-relation 12692. Up to 15685 conditions per place. [2023-08-04 00:16:08,592 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 42 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-08-04 00:16:08,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 263 flow [2023-08-04 00:16:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:16:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:16:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 625 transitions. [2023-08-04 00:16:08,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744485294117647 [2023-08-04 00:16:08,595 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 625 transitions. [2023-08-04 00:16:08,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 625 transitions. [2023-08-04 00:16:08,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:08,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 625 transitions. [2023-08-04 00:16:08,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states 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 00:16:08,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states 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 00:16:08,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states 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 00:16:08,599 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 149 flow. Second operand 4 states and 625 transitions. [2023-08-04 00:16:08,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 263 flow [2023-08-04 00:16:08,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 55 transitions, 258 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:16:08,601 INFO L231 Difference]: Finished difference. Result has 64 places, 40 transitions, 142 flow [2023-08-04 00:16:08,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=40} [2023-08-04 00:16:08,602 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2023-08-04 00:16:08,602 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 40 transitions, 142 flow [2023-08-04 00:16:08,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states 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 00:16:08,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:08,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:08,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:16:08,808 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 [2023-08-04 00:16:08,808 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:16:08,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:08,809 INFO L85 PathProgramCache]: Analyzing trace with hash 847941643, now seen corresponding path program 1 times [2023-08-04 00:16:08,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:08,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006152767] [2023-08-04 00:16:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:08,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:16:08,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:08,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006152767] [2023-08-04 00:16:08,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006152767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:16:08,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579284117] [2023-08-04 00:16:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:08,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:08,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:08,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:16:08,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:16:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:09,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:16:09,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:16:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:16:09,031 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:16:09,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579284117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:16:09,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:16:09,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:16:09,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403996724] [2023-08-04 00:16:09,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:16:09,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:16:09,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:09,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:16:09,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:16:09,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 272 [2023-08-04 00:16:09,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 40 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 00:16:09,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:09,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 272 [2023-08-04 00:16:09,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:10,372 INFO L124 PetriNetUnfolderBase]: 7183/10438 cut-off events. [2023-08-04 00:16:10,373 INFO L125 PetriNetUnfolderBase]: For 1279/1279 co-relation queries the response was YES. [2023-08-04 00:16:10,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21780 conditions, 10438 events. 7183/10438 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 60388 event pairs, 568 based on Foata normal form. 1296/11733 useless extension candidates. Maximal degree in co-relation 8699. Up to 7155 conditions per place. [2023-08-04 00:16:10,397 INFO L140 encePairwiseOnDemand]: 270/272 looper letters, 0 selfloop transitions, 0 changer transitions 58/58 dead transitions. [2023-08-04 00:16:10,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 274 flow [2023-08-04 00:16:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:16:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:16:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-08-04 00:16:10,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5808823529411765 [2023-08-04 00:16:10,399 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-08-04 00:16:10,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-08-04 00:16:10,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:10,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-08-04 00:16:10,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states 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 00:16:10,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states 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 00:16:10,403 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states 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 00:16:10,403 INFO L175 Difference]: Start difference. First operand has 64 places, 40 transitions, 142 flow. Second operand 4 states and 632 transitions. [2023-08-04 00:16:10,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 274 flow [2023-08-04 00:16:10,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 267 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:16:10,440 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2023-08-04 00:16:10,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2023-08-04 00:16:10,441 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-04 00:16:10,441 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2023-08-04 00:16:10,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 00:16:10,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:16:10,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:16:10,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:16:10,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:16:10,652 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 [2023-08-04 00:16:10,652 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:10,653 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:16:10,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:16:10,744 INFO L124 PetriNetUnfolderBase]: 93/1387 cut-off events. [2023-08-04 00:16:10,744 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:16:10,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 1387 events. 93/1387 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9388 event pairs, 0 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 1010. Up to 54 conditions per place. [2023-08-04 00:16:10,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:16:10,749 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 153 transitions, 330 flow [2023-08-04 00:16:10,749 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:16:10,749 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 00:16:10,750 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 00:16:10,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 153 transitions, 330 flow [2023-08-04 00:16:10,807 INFO L124 PetriNetUnfolderBase]: 66/1050 cut-off events. [2023-08-04 00:16:10,807 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:16:10,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1122 conditions, 1050 events. 66/1050 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6503 event pairs, 0 based on Foata normal form. 0/945 useless extension candidates. Maximal degree in co-relation 782. Up to 54 conditions per place. [2023-08-04 00:16:10,819 INFO L119 LiptonReduction]: Number of co-enabled transitions 4296 [2023-08-04 00:16:18,167 INFO L134 LiptonReduction]: Checked pairs total: 11854 [2023-08-04 00:16:18,168 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-04 00:16:18,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:16:18,169 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;@2926563d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:16:18,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:16:18,173 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:16:18,173 INFO L124 PetriNetUnfolderBase]: 0/20 cut-off events. [2023-08-04 00:16:18,173 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 00:16:18,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:18,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:16:18,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:16:18,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash 347357808, now seen corresponding path program 1 times [2023-08-04 00:16:18,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:18,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319498886] [2023-08-04 00:16:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:18,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:16:18,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319498886] [2023-08-04 00:16:18,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319498886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:16:18,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:16:18,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:16:18,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557865643] [2023-08-04 00:16:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:16:18,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:16:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:16:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:16:18,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 285 [2023-08-04 00:16:18,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states 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 00:16:18,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:18,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 285 [2023-08-04 00:16:18,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:31,611 INFO L124 PetriNetUnfolderBase]: 67656/94441 cut-off events. [2023-08-04 00:16:31,612 INFO L125 PetriNetUnfolderBase]: For 1941/1941 co-relation queries the response was YES. [2023-08-04 00:16:31,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184426 conditions, 94441 events. 67656/94441 cut-off events. For 1941/1941 co-relation queries the response was YES. Maximal size of possible extension queue 2877. Compared 660215 event pairs, 54330 based on Foata normal form. 0/90027 useless extension candidates. Maximal degree in co-relation 52585. Up to 87646 conditions per place. [2023-08-04 00:16:32,182 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 34 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 00:16:32,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 186 flow [2023-08-04 00:16:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:16:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:16:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-04 00:16:32,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-04 00:16:32,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-04 00:16:32,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-04 00:16:32,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:32,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-04 00:16:32,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 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) [2023-08-04 00:16:32,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:16:32,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:16:32,187 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 106 flow. Second operand 3 states and 475 transitions. [2023-08-04 00:16:32,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 186 flow [2023-08-04 00:16:32,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 186 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:16:32,189 INFO L231 Difference]: Finished difference. Result has 57 places, 42 transitions, 118 flow [2023-08-04 00:16:32,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=57, PETRI_TRANSITIONS=42} [2023-08-04 00:16:32,190 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-04 00:16:32,190 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 42 transitions, 118 flow [2023-08-04 00:16:32,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states 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 00:16:32,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:32,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:32,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 00:16:32,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:16:32,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1584188494, now seen corresponding path program 1 times [2023-08-04 00:16:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:32,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435556259] [2023-08-04 00:16:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:32,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:16:32,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:32,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435556259] [2023-08-04 00:16:32,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435556259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:16:32,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207537908] [2023-08-04 00:16:32,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:32,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:32,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:32,250 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:16:32,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:16:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:32,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:16:32,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:16:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:16:32,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:16:32,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207537908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:16:32,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:16:32,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:16:32,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548994231] [2023-08-04 00:16:32,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:16:32,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:16:32,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:32,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:16:32,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:16:32,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 285 [2023-08-04 00:16:32,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 00:16:32,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:32,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 285 [2023-08-04 00:16:32,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:45,073 INFO L124 PetriNetUnfolderBase]: 64142/87977 cut-off events. [2023-08-04 00:16:45,073 INFO L125 PetriNetUnfolderBase]: For 1719/1719 co-relation queries the response was YES. [2023-08-04 00:16:45,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172810 conditions, 87977 events. 64142/87977 cut-off events. For 1719/1719 co-relation queries the response was YES. Maximal size of possible extension queue 2799. Compared 595031 event pairs, 51808 based on Foata normal form. 0/84520 useless extension candidates. Maximal degree in co-relation 172773. Up to 82507 conditions per place. [2023-08-04 00:16:45,574 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 39 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 00:16:45,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 216 flow [2023-08-04 00:16:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:16:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:16:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-08-04 00:16:45,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.560233918128655 [2023-08-04 00:16:45,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-08-04 00:16:45,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-08-04 00:16:45,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:45,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-08-04 00:16:45,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 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) [2023-08-04 00:16:45,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:16:45,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:16:45,579 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 118 flow. Second operand 3 states and 479 transitions. [2023-08-04 00:16:45,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 216 flow [2023-08-04 00:16:45,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:16:45,580 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 128 flow [2023-08-04 00:16:45,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-04 00:16:45,581 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2023-08-04 00:16:45,581 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 128 flow [2023-08-04 00:16:45,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 00:16:45,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:45,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:45,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 00:16:45,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:45,782 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:16:45,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:45,783 INFO L85 PathProgramCache]: Analyzing trace with hash -963132522, now seen corresponding path program 1 times [2023-08-04 00:16:45,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:45,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530865609] [2023-08-04 00:16:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:45,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:16:45,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:45,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530865609] [2023-08-04 00:16:45,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530865609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:16:45,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855940906] [2023-08-04 00:16:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:45,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:45,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:45,830 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:16:45,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 00:16:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:45,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:16:45,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:16:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:16:45,985 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:16:45,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855940906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:16:45,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:16:45,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:16:45,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322823610] [2023-08-04 00:16:45,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:16:45,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:16:45,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:45,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:16:45,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:16:45,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 285 [2023-08-04 00:16:45,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 00:16:45,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:45,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 285 [2023-08-04 00:16:45,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:58,021 INFO L124 PetriNetUnfolderBase]: 63134/85874 cut-off events. [2023-08-04 00:16:58,021 INFO L125 PetriNetUnfolderBase]: For 977/977 co-relation queries the response was YES. [2023-08-04 00:16:58,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169601 conditions, 85874 events. 63134/85874 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 2803. Compared 571587 event pairs, 48590 based on Foata normal form. 0/82990 useless extension candidates. Maximal degree in co-relation 48500. Up to 78317 conditions per place. [2023-08-04 00:16:58,554 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 45 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-04 00:16:58,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 56 transitions, 248 flow [2023-08-04 00:16:58,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:16:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:16:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2023-08-04 00:16:58,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660818713450292 [2023-08-04 00:16:58,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2023-08-04 00:16:58,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2023-08-04 00:16:58,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:58,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2023-08-04 00:16:58,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 00:16:58,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:16:58,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:16:58,559 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 128 flow. Second operand 3 states and 484 transitions. [2023-08-04 00:16:58,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 56 transitions, 248 flow [2023-08-04 00:16:58,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:16:58,563 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 138 flow [2023-08-04 00:16:58,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-08-04 00:16:58,563 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2023-08-04 00:16:58,563 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 138 flow [2023-08-04 00:16:58,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 00:16:58,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:58,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:58,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 00:16:58,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 00:16:58,768 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:16:58,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:58,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1670478363, now seen corresponding path program 1 times [2023-08-04 00:16:58,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:58,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520760114] [2023-08-04 00:16:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:58,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:16:58,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:58,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520760114] [2023-08-04 00:16:58,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520760114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:16:58,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001146804] [2023-08-04 00:16:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:58,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:16:58,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:58,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:16:58,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 00:16:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:58,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:16:58,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:16:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:16:58,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:16:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:16:58,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001146804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:16:58,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:16:58,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:16:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929877844] [2023-08-04 00:16:58,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:16:58,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:16:58,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:58,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:16:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:16:59,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 285 [2023-08-04 00:16:59,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 states 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 00:16:59,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:59,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 285 [2023-08-04 00:16:59,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:17:08,696 INFO L124 PetriNetUnfolderBase]: 49612/66293 cut-off events. [2023-08-04 00:17:08,696 INFO L125 PetriNetUnfolderBase]: For 5676/5676 co-relation queries the response was YES. [2023-08-04 00:17:08,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136202 conditions, 66293 events. 49612/66293 cut-off events. For 5676/5676 co-relation queries the response was YES. Maximal size of possible extension queue 2229. Compared 407633 event pairs, 31560 based on Foata normal form. 3/65836 useless extension candidates. Maximal degree in co-relation 48390. Up to 63118 conditions per place. [2023-08-04 00:17:09,127 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 39 selfloop transitions, 3 changer transitions 1/52 dead transitions. [2023-08-04 00:17:09,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 52 transitions, 240 flow [2023-08-04 00:17:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:17:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:17:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 622 transitions. [2023-08-04 00:17:09,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456140350877193 [2023-08-04 00:17:09,129 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 622 transitions. [2023-08-04 00:17:09,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 622 transitions. [2023-08-04 00:17:09,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:17:09,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 622 transitions. [2023-08-04 00:17:09,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states 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 00:17:09,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states 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 00:17:09,133 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states 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 00:17:09,133 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 138 flow. Second operand 4 states and 622 transitions. [2023-08-04 00:17:09,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 52 transitions, 240 flow [2023-08-04 00:17:09,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:17:09,139 INFO L231 Difference]: Finished difference. Result has 65 places, 44 transitions, 150 flow [2023-08-04 00:17:09,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=65, PETRI_TRANSITIONS=44} [2023-08-04 00:17:09,139 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2023-08-04 00:17:09,139 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 44 transitions, 150 flow [2023-08-04 00:17:09,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 states 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 00:17:09,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:09,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:17:09,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 00:17:09,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:17:09,346 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:17:09,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1359608616, now seen corresponding path program 1 times [2023-08-04 00:17:09,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:09,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041633879] [2023-08-04 00:17:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:09,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:17:09,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:09,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041633879] [2023-08-04 00:17:09,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041633879] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:17:09,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998102351] [2023-08-04 00:17:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:09,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:17:09,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:17:09,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:17:09,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 00:17:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:09,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:17:09,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:17:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:17:09,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:17:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:17:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998102351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:17:09,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:17:09,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:17:09,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916491594] [2023-08-04 00:17:09,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:17:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:17:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:17:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:17:09,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 285 [2023-08-04 00:17:09,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 44 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states 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 00:17:09,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:09,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 285 [2023-08-04 00:17:09,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:17:17,284 INFO L124 PetriNetUnfolderBase]: 39043/51595 cut-off events. [2023-08-04 00:17:17,284 INFO L125 PetriNetUnfolderBase]: For 3978/3978 co-relation queries the response was YES. [2023-08-04 00:17:17,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105725 conditions, 51595 events. 39043/51595 cut-off events. For 3978/3978 co-relation queries the response was YES. Maximal size of possible extension queue 1920. Compared 306213 event pairs, 25267 based on Foata normal form. 27/51297 useless extension candidates. Maximal degree in co-relation 37493. Up to 48490 conditions per place. [2023-08-04 00:17:17,602 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 47 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2023-08-04 00:17:17,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 284 flow [2023-08-04 00:17:17,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:17:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:17:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2023-08-04 00:17:17,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5526315789473685 [2023-08-04 00:17:17,604 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2023-08-04 00:17:17,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2023-08-04 00:17:17,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:17:17,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2023-08-04 00:17:17,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:17,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states 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 00:17:17,608 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states 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 00:17:17,608 INFO L175 Difference]: Start difference. First operand has 65 places, 44 transitions, 150 flow. Second operand 4 states and 630 transitions. [2023-08-04 00:17:17,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 284 flow [2023-08-04 00:17:17,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 277 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:17:17,613 INFO L231 Difference]: Finished difference. Result has 67 places, 44 transitions, 157 flow [2023-08-04 00:17:17,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=67, PETRI_TRANSITIONS=44} [2023-08-04 00:17:17,613 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2023-08-04 00:17:17,613 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 44 transitions, 157 flow [2023-08-04 00:17:17,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states 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 00:17:17,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:17,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:17:17,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 00:17:17,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 00:17:17,816 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:17:17,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:17,817 INFO L85 PathProgramCache]: Analyzing trace with hash -311410591, now seen corresponding path program 1 times [2023-08-04 00:17:17,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:17,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965618361] [2023-08-04 00:17:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:17,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:17:17,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:17,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965618361] [2023-08-04 00:17:17,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965618361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:17:17,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518864465] [2023-08-04 00:17:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:17,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:17:17,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:17:17,877 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:17:17,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 00:17:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:18,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:17:18,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:17:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:17:18,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:17:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:17:18,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518864465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:17:18,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:17:18,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:17:18,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964358063] [2023-08-04 00:17:18,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:17:18,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:17:18,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:17:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:17:18,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 285 [2023-08-04 00:17:18,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 44 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states 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 00:17:18,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:18,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 285 [2023-08-04 00:17:18,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:17:24,758 INFO L124 PetriNetUnfolderBase]: 35506/45970 cut-off events. [2023-08-04 00:17:24,759 INFO L125 PetriNetUnfolderBase]: For 3106/3106 co-relation queries the response was YES. [2023-08-04 00:17:24,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95491 conditions, 45970 events. 35506/45970 cut-off events. For 3106/3106 co-relation queries the response was YES. Maximal size of possible extension queue 1735. Compared 253780 event pairs, 15364 based on Foata normal form. 324/46293 useless extension candidates. Maximal degree in co-relation 33848. Up to 27643 conditions per place. [2023-08-04 00:17:25,031 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 58 selfloop transitions, 3 changer transitions 1/71 dead transitions. [2023-08-04 00:17:25,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 71 transitions, 335 flow [2023-08-04 00:17:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:17:25,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:17:25,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-08-04 00:17:25,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622807017543859 [2023-08-04 00:17:25,033 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-08-04 00:17:25,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-08-04 00:17:25,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:17:25,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-08-04 00:17:25,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states 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 00:17:25,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states 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 00:17:25,036 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states 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 00:17:25,036 INFO L175 Difference]: Start difference. First operand has 67 places, 44 transitions, 157 flow. Second operand 4 states and 641 transitions. [2023-08-04 00:17:25,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 71 transitions, 335 flow [2023-08-04 00:17:25,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 328 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:17:25,040 INFO L231 Difference]: Finished difference. Result has 69 places, 44 transitions, 164 flow [2023-08-04 00:17:25,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=69, PETRI_TRANSITIONS=44} [2023-08-04 00:17:25,041 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2023-08-04 00:17:25,041 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 44 transitions, 164 flow [2023-08-04 00:17:25,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states 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 00:17:25,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:25,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:17:25,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 00:17:25,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:17:25,247 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:17:25,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1051554309, now seen corresponding path program 1 times [2023-08-04 00:17:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:25,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500345073] [2023-08-04 00:17:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:25,499 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 00:17:25,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:25,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500345073] [2023-08-04 00:17:25,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500345073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:17:25,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:17:25,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:17:25,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327826889] [2023-08-04 00:17:25,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:17:25,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:17:25,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:25,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:17:25,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:17:25,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 285 [2023-08-04 00:17:25,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 44 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:25,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:25,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 285 [2023-08-04 00:17:25,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:17:31,203 INFO L124 PetriNetUnfolderBase]: 29410/37795 cut-off events. [2023-08-04 00:17:31,204 INFO L125 PetriNetUnfolderBase]: For 14254/14254 co-relation queries the response was YES. [2023-08-04 00:17:31,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84388 conditions, 37795 events. 29410/37795 cut-off events. For 14254/14254 co-relation queries the response was YES. Maximal size of possible extension queue 1315. Compared 194141 event pairs, 13156 based on Foata normal form. 144/37875 useless extension candidates. Maximal degree in co-relation 29827. Up to 34525 conditions per place. [2023-08-04 00:17:31,420 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 56 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-08-04 00:17:31,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 377 flow [2023-08-04 00:17:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:17:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:17:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-04 00:17:31,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801169590643275 [2023-08-04 00:17:31,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-04 00:17:31,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-04 00:17:31,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:17:31,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-04 00:17:31,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 00:17:31,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:17:31,424 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 00:17:31,424 INFO L175 Difference]: Start difference. First operand has 69 places, 44 transitions, 164 flow. Second operand 3 states and 496 transitions. [2023-08-04 00:17:31,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 377 flow [2023-08-04 00:17:31,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 363 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:17:31,431 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 176 flow [2023-08-04 00:17:31,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2023-08-04 00:17:31,431 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2023-08-04 00:17:31,432 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 176 flow [2023-08-04 00:17:31,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:31,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:31,432 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 00:17:31,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 00:17:31,432 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:17:31,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1924130647, now seen corresponding path program 1 times [2023-08-04 00:17:31,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:31,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464418989] [2023-08-04 00:17:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:31,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:17:31,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:31,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464418989] [2023-08-04 00:17:31,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464418989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:17:31,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839971462] [2023-08-04 00:17:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:31,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:17:31,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:17:31,593 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 00:17:31,595 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 00:17:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:31,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 00:17:31,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:17:31,800 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 00:17:31,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:17:31,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839971462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:17:31,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:17:31,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2] total 5 [2023-08-04 00:17:31,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522679596] [2023-08-04 00:17:31,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:17:31,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:17:31,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:31,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:17:31,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:17:31,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 285 [2023-08-04 00:17:31,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:31,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:31,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 285 [2023-08-04 00:17:31,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:17:37,874 INFO L124 PetriNetUnfolderBase]: 31282/40200 cut-off events. [2023-08-04 00:17:37,874 INFO L125 PetriNetUnfolderBase]: For 15415/15415 co-relation queries the response was YES. [2023-08-04 00:17:38,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94975 conditions, 40200 events. 31282/40200 cut-off events. For 15415/15415 co-relation queries the response was YES. Maximal size of possible extension queue 1551. Compared 213119 event pairs, 6502 based on Foata normal form. 1296/41491 useless extension candidates. Maximal degree in co-relation 62192. Up to 32471 conditions per place. [2023-08-04 00:17:38,128 INFO L140 encePairwiseOnDemand]: 276/285 looper letters, 62 selfloop transitions, 7 changer transitions 33/111 dead transitions. [2023-08-04 00:17:38,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 111 transitions, 603 flow [2023-08-04 00:17:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:17:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:17:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 785 transitions. [2023-08-04 00:17:38,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508771929824562 [2023-08-04 00:17:38,130 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 785 transitions. [2023-08-04 00:17:38,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 785 transitions. [2023-08-04 00:17:38,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:17:38,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 785 transitions. [2023-08-04 00:17:38,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states 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 00:17:38,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states 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 00:17:38,134 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states 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 00:17:38,135 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 176 flow. Second operand 5 states and 785 transitions. [2023-08-04 00:17:38,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 111 transitions, 603 flow [2023-08-04 00:17:38,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 111 transitions, 594 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:17:38,143 INFO L231 Difference]: Finished difference. Result has 75 places, 52 transitions, 236 flow [2023-08-04 00:17:38,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2023-08-04 00:17:38,143 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2023-08-04 00:17:38,144 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 236 flow [2023-08-04 00:17:38,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:38,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:38,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:17:38,149 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 00:17:38,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 00:17:38,350 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:17:38,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash 42253449, now seen corresponding path program 1 times [2023-08-04 00:17:38,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:38,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027275202] [2023-08-04 00:17:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:38,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:38,492 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 00:17:38,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:38,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027275202] [2023-08-04 00:17:38,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027275202] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:17:38,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237504130] [2023-08-04 00:17:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:38,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:17:38,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:17:38,498 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 00:17:38,531 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 00:17:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:38,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 00:17:38,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:17:38,735 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 00:17:38,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:17:38,811 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 00:17:38,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237504130] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:17:38,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:17:38,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 4, 4] total 7 [2023-08-04 00:17:38,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849731709] [2023-08-04 00:17:38,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:17:38,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 00:17:38,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:38,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 00:17:38,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-04 00:17:38,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 285 [2023-08-04 00:17:38,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 236 flow. Second operand has 8 states, 8 states have (on average 140.375) internal successors, (1123), 8 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states 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 00:17:38,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:38,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 285 [2023-08-04 00:17:38,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand