/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe015_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:25:24,045 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:25:24,116 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:25:24,119 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:25:24,119 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:25:24,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:25:24,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:25:24,145 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:25:24,146 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:25:24,149 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:25:24,150 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:25:24,150 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:25:24,151 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:25:24,152 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:25:24,152 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:25:24,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:25:24,152 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:25:24,153 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:25:24,153 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:25:24,153 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:25:24,153 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:25:24,154 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:25:24,154 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:25:24,154 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:25:24,155 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:25:24,155 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:25:24,155 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:25:24,156 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:25:24,156 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:25:24,156 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:25:24,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:25:24,157 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:25:24,157 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:25:24,158 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:25:24,158 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:25:24,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:25:24,158 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:25:24,158 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:25:24,158 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:25:24,158 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:25:24,158 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:25:24,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:25:24,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:25:24,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:25:24,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:25:24,408 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:25:24,409 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:25:24,409 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe015_power.opt_bound2.i [2023-08-03 18:25:25,602 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:25:25,837 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:25:25,838 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe015_power.opt_bound2.i [2023-08-03 18:25:25,854 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/724bfa56d/1bf073f9fc9e4710b057aa52fb54d8c3/FLAGf9860f561 [2023-08-03 18:25:25,870 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/724bfa56d/1bf073f9fc9e4710b057aa52fb54d8c3 [2023-08-03 18:25:25,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:25:25,873 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:25:25,874 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:25:25,875 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:25:25,879 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:25:25,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:25:25" (1/1) ... [2023-08-03 18:25:25,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a09a65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:25, skipping insertion in model container [2023-08-03 18:25:25,881 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:25:25" (1/1) ... [2023-08-03 18:25:25,918 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:25:26,057 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_safe015_power.opt_bound2.i[994,1007] [2023-08-03 18:25:26,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:25:26,267 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:25:26,276 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_safe015_power.opt_bound2.i[994,1007] [2023-08-03 18:25:26,283 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 18:25:26,285 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 18:25:26,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:25:26,390 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:25:26,390 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:25:26,395 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:25:26,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26 WrapperNode [2023-08-03 18:25:26,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:25:26,397 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:25:26,397 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:25:26,397 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:25:26,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (1/1) ... [2023-08-03 18:25:26,419 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (1/1) ... [2023-08-03 18:25:26,442 INFO L138 Inliner]: procedures = 176, calls = 86, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 193 [2023-08-03 18:25:26,442 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:25:26,443 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:25:26,443 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:25:26,443 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:25:26,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (1/1) ... [2023-08-03 18:25:26,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (1/1) ... [2023-08-03 18:25:26,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (1/1) ... [2023-08-03 18:25:26,462 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (1/1) ... [2023-08-03 18:25:26,474 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (1/1) ... [2023-08-03 18:25:26,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (1/1) ... [2023-08-03 18:25:26,481 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (1/1) ... [2023-08-03 18:25:26,483 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (1/1) ... [2023-08-03 18:25:26,487 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:25:26,488 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:25:26,488 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:25:26,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:25:26,489 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (1/1) ... [2023-08-03 18:25:26,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:25:26,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:25:26,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 18:25:26,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 18:25:26,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 18:25:26,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:25:26,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 18:25:26,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:25:26,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:25:26,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:25:26,564 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 18:25:26,564 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 18:25:26,565 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 18:25:26,565 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 18:25:26,565 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 18:25:26,565 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 18:25:26,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:25:26,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 18:25:26,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:25:26,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:25:26,567 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 18:25:26,718 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:25:26,719 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:25:27,267 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:25:27,573 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:25:27,574 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 18:25:27,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:25:27 BoogieIcfgContainer [2023-08-03 18:25:27,576 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:25:27,578 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:25:27,578 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:25:27,581 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:25:27,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:25:25" (1/3) ... [2023-08-03 18:25:27,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11690968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:25:27, skipping insertion in model container [2023-08-03 18:25:27,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:25:26" (2/3) ... [2023-08-03 18:25:27,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11690968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:25:27, skipping insertion in model container [2023-08-03 18:25:27,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:25:27" (3/3) ... [2023-08-03 18:25:27,584 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe015_power.opt_bound2.i [2023-08-03 18:25:27,591 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:25:27,599 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:25:27,599 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 18:25:27,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:25:27,671 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:25:27,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-03 18:25:27,843 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-03 18:25:27,843 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:25:27,849 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 1951 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. [2023-08-03 18:25:27,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-03 18:25:27,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 133 transitions, 281 flow [2023-08-03 18:25:27,856 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:25:27,864 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 133 transitions, 281 flow [2023-08-03 18:25:27,866 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 133 transitions, 281 flow [2023-08-03 18:25:27,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 133 transitions, 281 flow [2023-08-03 18:25:27,941 INFO L124 PetriNetUnfolderBase]: 22/368 cut-off events. [2023-08-03 18:25:27,941 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:25:27,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 368 events. 22/368 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1397 event pairs, 0 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 237. Up to 16 conditions per place. [2023-08-03 18:25:27,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 1916 [2023-08-03 18:25:35,291 INFO L134 LiptonReduction]: Checked pairs total: 5424 [2023-08-03 18:25:35,292 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-03 18:25:35,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:25:35,307 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;@6332bb1a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:25:35,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:25:35,312 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:25:35,312 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 18:25:35,312 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:25:35,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:25:35,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:25:35,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:25:35,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:25:35,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1425738770, now seen corresponding path program 1 times [2023-08-03 18:25:35,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:25:35,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293320259] [2023-08-03 18:25:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:25:35,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:25:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:25:35,456 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:25:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:25:35,532 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:25:35,534 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:25:35,535 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 18:25:35,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 18:25:35,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 18:25:35,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 18:25:35,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:25:35,538 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 18:25:35,545 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:25:35,545 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:25:35,604 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:25:35,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 18:25:35,846 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-03 18:25:35,847 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:25:35,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 1391 events. 93/1391 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9385 event pairs, 0 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-03 18:25:35,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 18:25:35,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 156 transitions, 348 flow [2023-08-03 18:25:35,859 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:25:35,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 156 transitions, 348 flow [2023-08-03 18:25:35,860 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 156 transitions, 348 flow [2023-08-03 18:25:35,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 156 transitions, 348 flow [2023-08-03 18:25:35,995 INFO L124 PetriNetUnfolderBase]: 66/1067 cut-off events. [2023-08-03 18:25:35,996 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:25:36,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1165 conditions, 1067 events. 66/1067 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6622 event pairs, 0 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 798. Up to 54 conditions per place. [2023-08-03 18:25:36,016 INFO L119 LiptonReduction]: Number of co-enabled transitions 4748 [2023-08-03 18:25:43,596 INFO L134 LiptonReduction]: Checked pairs total: 15960 [2023-08-03 18:25:43,596 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-03 18:25:43,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:25:43,599 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;@6332bb1a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:25:43,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:25:43,604 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:25:43,604 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-03 18:25:43,605 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 18:25:43,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:25:43,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:25:43,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:25:43,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:25:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash 405292449, now seen corresponding path program 1 times [2023-08-03 18:25:43,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:25:43,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098609482] [2023-08-03 18:25:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:25:43,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:25:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:25:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:25:43,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:25:43,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098609482] [2023-08-03 18:25:43,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098609482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:25:43,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:25:43,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:25:43,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492478570] [2023-08-03 18:25:43,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:25:43,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:25:43,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:25:43,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:25:43,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:25:43,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-03 18:25:43,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:25:43,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:25:43,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-03 18:25:43,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:26:36,088 INFO L124 PetriNetUnfolderBase]: 272349/362804 cut-off events. [2023-08-03 18:26:36,089 INFO L125 PetriNetUnfolderBase]: For 6060/6060 co-relation queries the response was YES. [2023-08-03 18:26:36,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713985 conditions, 362804 events. 272349/362804 cut-off events. For 6060/6060 co-relation queries the response was YES. Maximal size of possible extension queue 8961. Compared 2523942 event pairs, 218772 based on Foata normal form. 8820/350588 useless extension candidates. Maximal degree in co-relation 154206. Up to 343786 conditions per place. [2023-08-03 18:26:38,436 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 40 selfloop transitions, 2 changer transitions 1/53 dead transitions. [2023-08-03 18:26:38,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 228 flow [2023-08-03 18:26:38,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:26:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:26:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-03 18:26:38,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547703180212014 [2023-08-03 18:26:38,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-03 18:26:38,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-03 18:26:38,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:26:38,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-03 18:26:38,455 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) [2023-08-03 18:26:38,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:26:38,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:26:38,462 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 134 flow. Second operand 3 states and 471 transitions. [2023-08-03 18:26:38,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 228 flow [2023-08-03 18:26:38,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 53 transitions, 222 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 18:26:38,476 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 136 flow [2023-08-03 18:26:38,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2023-08-03 18:26:38,482 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-03 18:26:38,485 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 136 flow [2023-08-03 18:26:38,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:26:38,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:26:38,491 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 18:26:38,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:26:38,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:26:38,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:26:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1813332828, now seen corresponding path program 1 times [2023-08-03 18:26:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:26:38,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758515397] [2023-08-03 18:26:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:26:38,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:26:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:26:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:26:38,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:26:38,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758515397] [2023-08-03 18:26:38,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758515397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:26:38,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831789032] [2023-08-03 18:26:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:26:38,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:26:38,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:26:38,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:26:38,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 18:26:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:26:38,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:26:38,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:26:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:26:38,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:26:38,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831789032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:26:38,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:26:38,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 18:26:38,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670408076] [2023-08-03 18:26:38,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:26:38,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:26:38,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:26:38,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:26:38,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:26:38,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 18:26:38,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:26:38,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:26:38,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 18:26:38,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:27:22,513 INFO L124 PetriNetUnfolderBase]: 237738/317329 cut-off events. [2023-08-03 18:27:22,513 INFO L125 PetriNetUnfolderBase]: For 5384/5384 co-relation queries the response was YES. [2023-08-03 18:27:23,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624502 conditions, 317329 events. 237738/317329 cut-off events. For 5384/5384 co-relation queries the response was YES. Maximal size of possible extension queue 7816. Compared 2189689 event pairs, 153240 based on Foata normal form. 16/305565 useless extension candidates. Maximal degree in co-relation 163940. Up to 300296 conditions per place. [2023-08-03 18:27:24,627 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 45 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-08-03 18:27:24,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 254 flow [2023-08-03 18:27:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:27:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:27:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 755 transitions. [2023-08-03 18:27:24,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335689045936396 [2023-08-03 18:27:24,630 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 755 transitions. [2023-08-03 18:27:24,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 755 transitions. [2023-08-03 18:27:24,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:27:24,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 755 transitions. [2023-08-03 18:27:24,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:27:24,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:27:24,636 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:27:24,636 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 136 flow. Second operand 5 states and 755 transitions. [2023-08-03 18:27:24,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 254 flow [2023-08-03 18:27:24,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 18:27:24,639 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 150 flow [2023-08-03 18:27:24,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-08-03 18:27:24,640 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 5 predicate places. [2023-08-03 18:27:24,640 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 150 flow [2023-08-03 18:27:24,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:27:24,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:27:24,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:27:24,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 18:27:24,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:27:24,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:27:24,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:27:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1230214403, now seen corresponding path program 1 times [2023-08-03 18:27:24,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:27:24,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650200371] [2023-08-03 18:27:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:27:24,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:27:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:27:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:27:24,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:27:24,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650200371] [2023-08-03 18:27:24,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650200371] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:27:24,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238707453] [2023-08-03 18:27:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:27:24,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:27:24,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:27:24,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:27:24,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 18:27:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:27:25,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:27:25,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:27:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:27:25,104 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:27:25,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238707453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:27:25,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:27:25,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:27:25,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839877025] [2023-08-03 18:27:25,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:27:25,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:27:25,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:27:25,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:27:25,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:27:25,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-03 18:27:25,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:27:25,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:27:25,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-03 18:27:25,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:28:10,208 INFO L124 PetriNetUnfolderBase]: 230316/306527 cut-off events. [2023-08-03 18:28:10,209 INFO L125 PetriNetUnfolderBase]: For 4980/4980 co-relation queries the response was YES. [2023-08-03 18:28:11,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603821 conditions, 306527 events. 230316/306527 cut-off events. For 4980/4980 co-relation queries the response was YES. Maximal size of possible extension queue 7767. Compared 2102771 event pairs, 185514 based on Foata normal form. 0/296767 useless extension candidates. Maximal degree in co-relation 130301. Up to 289721 conditions per place. [2023-08-03 18:28:12,071 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 47 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-03 18:28:12,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 272 flow [2023-08-03 18:28:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:28:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:28:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-03 18:28:12,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5594817432273262 [2023-08-03 18:28:12,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-03 18:28:12,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-03 18:28:12,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:28:12,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-03 18:28:12,075 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) [2023-08-03 18:28:12,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:28:12,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:28:12,077 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 150 flow. Second operand 3 states and 475 transitions. [2023-08-03 18:28:12,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 272 flow [2023-08-03 18:28:12,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 59 transitions, 265 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 18:28:12,080 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 158 flow [2023-08-03 18:28:12,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-08-03 18:28:12,080 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-03 18:28:12,081 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 158 flow [2023-08-03 18:28:12,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:28:12,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:28:12,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:28:12,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 18:28:12,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 18:28:12,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:28:12,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:28:12,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1880983795, now seen corresponding path program 1 times [2023-08-03 18:28:12,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:28:12,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660241880] [2023-08-03 18:28:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:28:12,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:28:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:28:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:28:12,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:28:12,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660241880] [2023-08-03 18:28:12,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660241880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:28:12,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796935015] [2023-08-03 18:28:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:28:12,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:28:12,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:28:12,385 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:28:12,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 18:28:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:28:12,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:28:12,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:28:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 18:28:12,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:28:12,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796935015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:28:12,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:28:12,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:28:12,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008460112] [2023-08-03 18:28:12,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:28:12,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:28:12,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:28:12,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:28:12,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:28:12,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-03 18:28:12,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:28:12,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:28:12,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-03 18:28:12,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand