/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_safe001_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 17:52:04,568 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 17:52:04,647 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 17:52:04,651 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 17:52:04,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 17:52:04,652 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 17:52:04,652 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 17:52:04,684 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 17:52:04,684 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 17:52:04,685 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 17:52:04,685 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 17:52:04,685 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 17:52:04,686 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 17:52:04,686 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 17:52:04,687 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 17:52:04,687 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 17:52:04,687 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 17:52:04,687 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 17:52:04,688 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 17:52:04,688 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 17:52:04,692 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 17:52:04,692 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 17:52:04,692 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 17:52:04,693 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 17:52:04,693 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 17:52:04,694 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 17:52:04,694 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 17:52:04,694 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 17:52:04,694 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 17:52:04,695 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 17:52:04,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:52:04,695 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 17:52:04,695 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 17:52:04,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 17:52:04,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 17:52:04,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 17:52:04,696 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 17:52:04,696 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 17:52:04,697 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 17:52:04,697 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 17:52:04,697 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 17:52:04,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 17:52:04,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 17:52:04,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 17:52:04,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 17:52:04,920 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 17:52:04,920 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 17:52:04,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe001_power.oepc_bound2.i [2023-08-03 17:52:06,043 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 17:52:06,341 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 17:52:06,342 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe001_power.oepc_bound2.i [2023-08-03 17:52:06,363 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89c28e408/78ad0438be15417f8654cce41303002e/FLAG9be673abf [2023-08-03 17:52:06,378 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89c28e408/78ad0438be15417f8654cce41303002e [2023-08-03 17:52:06,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 17:52:06,384 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 17:52:06,387 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 17:52:06,388 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 17:52:06,390 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 17:52:06,391 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:06,392 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c70e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06, skipping insertion in model container [2023-08-03 17:52:06,392 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:06,445 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 17:52:06,612 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_safe001_power.oepc_bound2.i[995,1008] [2023-08-03 17:52:06,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:52:06,802 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 17:52:06,812 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_safe001_power.oepc_bound2.i[995,1008] [2023-08-03 17:52:06,819 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 17:52:06,821 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 17:52:06,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:52:06,891 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:52:06,892 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:52:06,898 INFO L206 MainTranslator]: Completed translation [2023-08-03 17:52:06,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06 WrapperNode [2023-08-03 17:52:06,898 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 17:52:06,899 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 17:52:06,899 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 17:52:06,899 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 17:52:06,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:06,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:06,973 INFO L138 Inliner]: procedures = 176, calls = 84, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 197 [2023-08-03 17:52:06,973 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 17:52:06,974 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 17:52:06,974 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 17:52:06,974 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 17:52:06,983 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:06,983 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:06,992 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:06,992 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:07,007 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:07,018 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:07,024 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:07,026 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:07,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 17:52:07,031 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 17:52:07,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 17:52:07,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 17:52:07,032 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (1/1) ... [2023-08-03 17:52:07,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:52:07,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:52:07,074 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 17:52:07,100 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 17:52:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 17:52:07,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 17:52:07,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 17:52:07,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 17:52:07,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 17:52:07,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 17:52:07,120 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 17:52:07,120 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 17:52:07,120 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 17:52:07,120 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 17:52:07,120 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 17:52:07,121 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 17:52:07,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 17:52:07,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 17:52:07,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 17:52:07,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 17:52:07,123 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 17:52:07,281 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 17:52:07,283 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 17:52:07,751 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 17:52:08,069 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 17:52:08,070 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 17:52:08,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:52:08 BoogieIcfgContainer [2023-08-03 17:52:08,072 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 17:52:08,075 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 17:52:08,075 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 17:52:08,077 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 17:52:08,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 05:52:06" (1/3) ... [2023-08-03 17:52:08,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eff107f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:52:08, skipping insertion in model container [2023-08-03 17:52:08,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:52:06" (2/3) ... [2023-08-03 17:52:08,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eff107f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:52:08, skipping insertion in model container [2023-08-03 17:52:08,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:52:08" (3/3) ... [2023-08-03 17:52:08,081 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe001_power.oepc_bound2.i [2023-08-03 17:52:08,087 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 17:52:08,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 17:52:08,096 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 17:52:08,096 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 17:52:08,168 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:52:08,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-03 17:52:08,308 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-03 17:52:08,308 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:52:08,315 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 1946 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 17:52:08,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-03 17:52:08,320 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 133 transitions, 281 flow [2023-08-03 17:52:08,323 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:52:08,330 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 133 transitions, 281 flow [2023-08-03 17:52:08,332 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 133 transitions, 281 flow [2023-08-03 17:52:08,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 133 transitions, 281 flow [2023-08-03 17:52:08,390 INFO L124 PetriNetUnfolderBase]: 22/368 cut-off events. [2023-08-03 17:52:08,391 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:52:08,392 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 1388 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 17:52:08,396 INFO L119 LiptonReduction]: Number of co-enabled transitions 1916 [2023-08-03 17:52:15,806 INFO L134 LiptonReduction]: Checked pairs total: 5605 [2023-08-03 17:52:15,807 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-03 17:52:15,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:52:15,824 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;@32956b05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:52:15,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 17:52:15,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:52:15,830 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 17:52:15,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:52:15,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:52:15,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 17:52:15,831 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 17:52:15,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:52:15,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1018961685, now seen corresponding path program 1 times [2023-08-03 17:52:15,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:52:15,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055193326] [2023-08-03 17:52:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:52:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:52:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:52:15,939 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 17:52:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:52:15,982 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 17:52:15,984 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 17:52:15,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 17:52:15,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 17:52:15,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 17:52:15,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 17:52:15,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 17:52:15,987 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 17:52:15,990 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 17:52:15,990 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 17:52:16,051 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:52:16,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 17:52:16,323 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-03 17:52:16,323 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 17:52:16,331 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 9370 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 17:52:16,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 17:52:16,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 156 transitions, 348 flow [2023-08-03 17:52:16,335 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:52:16,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 156 transitions, 348 flow [2023-08-03 17:52:16,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 156 transitions, 348 flow [2023-08-03 17:52:16,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 156 transitions, 348 flow [2023-08-03 17:52:16,491 INFO L124 PetriNetUnfolderBase]: 66/1067 cut-off events. [2023-08-03 17:52:16,491 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 17:52:16,495 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 6604 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 17:52:16,515 INFO L119 LiptonReduction]: Number of co-enabled transitions 4748 [2023-08-03 17:52:25,578 INFO L134 LiptonReduction]: Checked pairs total: 16761 [2023-08-03 17:52:25,578 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-03 17:52:25,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:52:25,581 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;@32956b05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:52:25,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 17:52:25,587 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:52:25,587 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-08-03 17:52:25,587 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 17:52:25,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:52:25,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:52:25,588 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 17:52:25,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:52:25,588 INFO L85 PathProgramCache]: Analyzing trace with hash 359579675, now seen corresponding path program 1 times [2023-08-03 17:52:25,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:52:25,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137802043] [2023-08-03 17:52:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:52:25,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:52:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:52:25,798 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 17:52:25,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:52:25,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137802043] [2023-08-03 17:52:25,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137802043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:52:25,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 17:52:25,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 17:52:25,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56113845] [2023-08-03 17:52:25,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:52:25,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:52:25,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:52:25,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:52:25,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 17:52:25,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-03 17:52:25,859 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 17:52:25,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:52:25,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-03 17:52:25,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:53:02,528 INFO L124 PetriNetUnfolderBase]: 155552/208584 cut-off events. [2023-08-03 17:53:02,529 INFO L125 PetriNetUnfolderBase]: For 3828/3828 co-relation queries the response was YES. [2023-08-03 17:53:03,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412019 conditions, 208584 events. 155552/208584 cut-off events. For 3828/3828 co-relation queries the response was YES. Maximal size of possible extension queue 5885. Compared 1441817 event pairs, 126978 based on Foata normal form. 5292/202284 useless extension candidates. Maximal degree in co-relation 118284. Up to 198414 conditions per place. [2023-08-03 17:53:03,903 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 37 selfloop transitions, 2 changer transitions 1/52 dead transitions. [2023-08-03 17:53:03,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 220 flow [2023-08-03 17:53:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:53:03,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:53:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-03 17:53:03,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512367491166078 [2023-08-03 17:53:03,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-03 17:53:03,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-03 17:53:03,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:53:03,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-03 17:53:03,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 17:53:03,937 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 17:53:03,939 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 17:53:03,940 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 134 flow. Second operand 3 states and 468 transitions. [2023-08-03 17:53:03,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 220 flow [2023-08-03 17:53:03,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 214 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 17:53:03,959 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 136 flow [2023-08-03 17:53:03,962 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 17:53:03,966 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-03 17:53:03,968 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 136 flow [2023-08-03 17:53:03,969 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 17:53:03,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:53:03,973 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 17:53:03,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 17:53:03,974 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 17:53:03,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:53:03,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2086176482, now seen corresponding path program 1 times [2023-08-03 17:53:03,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:53:03,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416680149] [2023-08-03 17:53:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:53:03,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:53:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:53:04,069 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 17:53:04,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:53:04,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416680149] [2023-08-03 17:53:04,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416680149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:53:04,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161343509] [2023-08-03 17:53:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:53:04,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:53:04,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:53:04,077 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 17:53:04,107 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 17:53:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:53:04,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 17:53:04,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:53:04,274 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 17:53:04,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:53:04,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161343509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:53:04,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:53:04,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 17:53:04,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152447829] [2023-08-03 17:53:04,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:53:04,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:53:04,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:53:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:53:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 17:53:04,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 17:53:04,299 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 17:53:04,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:53:04,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 17:53:04,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:53:34,202 INFO L124 PetriNetUnfolderBase]: 135758/182451 cut-off events. [2023-08-03 17:53:34,202 INFO L125 PetriNetUnfolderBase]: For 3183/3183 co-relation queries the response was YES. [2023-08-03 17:53:34,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360167 conditions, 182451 events. 135758/182451 cut-off events. For 3183/3183 co-relation queries the response was YES. Maximal size of possible extension queue 5111. Compared 1249493 event pairs, 91944 based on Foata normal form. 9/176232 useless extension candidates. Maximal degree in co-relation 128391. Up to 173293 conditions per place. [2023-08-03 17:53:35,439 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 40 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-08-03 17:53:35,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 238 flow [2023-08-03 17:53:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 17:53:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 17:53:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 750 transitions. [2023-08-03 17:53:35,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300353356890459 [2023-08-03 17:53:35,443 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 750 transitions. [2023-08-03 17:53:35,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 750 transitions. [2023-08-03 17:53:35,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:53:35,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 750 transitions. [2023-08-03 17:53:35,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 17:53:35,449 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 17:53:35,450 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 17:53:35,450 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 136 flow. Second operand 5 states and 750 transitions. [2023-08-03 17:53:35,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 238 flow [2023-08-03 17:53:35,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 55 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 17:53:35,452 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 150 flow [2023-08-03 17:53:35,452 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 17:53:35,454 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 5 predicate places. [2023-08-03 17:53:35,454 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 150 flow [2023-08-03 17:53:35,455 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 17:53:35,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:53:35,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:53:35,463 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 17:53:35,660 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 17:53:35,660 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 17:53:35,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:53:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2026247466, now seen corresponding path program 1 times [2023-08-03 17:53:35,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:53:35,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506750788] [2023-08-03 17:53:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:53:35,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:53:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:53:35,742 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 17:53:35,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:53:35,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506750788] [2023-08-03 17:53:35,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506750788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:53:35,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221936013] [2023-08-03 17:53:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:53:35,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:53:35,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:53:35,751 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 17:53:35,752 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 17:53:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:53:35,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 17:53:35,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:53:35,906 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 17:53:35,906 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:53:35,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221936013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:53:35,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:53:35,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 17:53:35,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987053035] [2023-08-03 17:53:35,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:53:35,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:53:35,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:53:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:53:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:53:35,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-03 17:53:35,916 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 17:53:35,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:53:35,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-03 17:53:35,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:54:04,522 INFO L124 PetriNetUnfolderBase]: 131626/177172 cut-off events. [2023-08-03 17:54:04,522 INFO L125 PetriNetUnfolderBase]: For 2794/2794 co-relation queries the response was YES. [2023-08-03 17:54:05,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348995 conditions, 177172 events. 131626/177172 cut-off events. For 2794/2794 co-relation queries the response was YES. Maximal size of possible extension queue 5087. Compared 1219014 event pairs, 104758 based on Foata normal form. 0/171400 useless extension candidates. Maximal degree in co-relation 100408. Up to 167284 conditions per place. [2023-08-03 17:54:05,547 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 43 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-03 17:54:05,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 57 transitions, 260 flow [2023-08-03 17:54:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:54:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:54:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-03 17:54:05,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547703180212014 [2023-08-03 17:54:05,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-03 17:54:05,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-03 17:54:05,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:54:05,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-03 17:54:05,551 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 17:54:05,553 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 17:54:05,554 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 17:54:05,554 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 150 flow. Second operand 3 states and 471 transitions. [2023-08-03 17:54:05,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 57 transitions, 260 flow [2023-08-03 17:54:05,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 57 transitions, 253 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 17:54:05,556 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 158 flow [2023-08-03 17:54:05,556 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 17:54:05,557 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-03 17:54:05,557 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 158 flow [2023-08-03 17:54:05,557 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 17:54:05,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:54:05,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:54:05,566 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 17:54:05,763 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 17:54:05,763 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 17:54:05,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:54:05,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1677883890, now seen corresponding path program 1 times [2023-08-03 17:54:05,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:54:05,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092020763] [2023-08-03 17:54:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:54:05,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:54:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:54:05,881 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 17:54:05,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:54:05,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092020763] [2023-08-03 17:54:05,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092020763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:54:05,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865048334] [2023-08-03 17:54:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:54:05,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:54:05,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:54:05,885 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 17:54:05,887 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 17:54:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:54:06,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 17:54:06,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:54:06,063 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 17:54:06,063 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:54:06,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865048334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:54:06,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:54:06,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 17:54:06,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142667379] [2023-08-03 17:54:06,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:54:06,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:54:06,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:54:06,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:54:06,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:54:06,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-03 17:54:06,080 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 17:54:06,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:54:06,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-03 17:54:06,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:54:34,339 INFO L124 PetriNetUnfolderBase]: 129210/171732 cut-off events. [2023-08-03 17:54:34,339 INFO L125 PetriNetUnfolderBase]: For 1644/1644 co-relation queries the response was YES. [2023-08-03 17:54:34,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340935 conditions, 171732 events. 129210/171732 cut-off events. For 1644/1644 co-relation queries the response was YES. Maximal size of possible extension queue 5040. Compared 1151409 event pairs, 101106 based on Foata normal form. 0/165720 useless extension candidates. Maximal degree in co-relation 98148. Up to 159000 conditions per place. [2023-08-03 17:54:35,439 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 51 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-03 17:54:35,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 294 flow [2023-08-03 17:54:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:54:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:54:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-03 17:54:35,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5618374558303887 [2023-08-03 17:54:35,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-03 17:54:35,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-03 17:54:35,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:54:35,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-03 17:54:35,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states 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 17:54:35,445 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 17:54:35,445 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 17:54:35,445 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 158 flow. Second operand 3 states and 477 transitions. [2023-08-03 17:54:35,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 294 flow [2023-08-03 17:54:35,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 64 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 17:54:35,448 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 167 flow [2023-08-03 17:54:35,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-08-03 17:54:35,449 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 8 predicate places. [2023-08-03 17:54:35,449 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 167 flow [2023-08-03 17:54:35,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:54:35,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:54:35,449 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:54:35,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 17:54:35,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:54:35,656 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 17:54:35,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:54:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash -24380313, now seen corresponding path program 1 times [2023-08-03 17:54:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:54:35,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970021088] [2023-08-03 17:54:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:54:35,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:54:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:54:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 17:54:35,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:54:35,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970021088] [2023-08-03 17:54:35,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970021088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:54:35,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445597145] [2023-08-03 17:54:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:54:35,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:54:35,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:54:35,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:54:35,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 17:54:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:54:35,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 17:54:35,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:54:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 17:54:35,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 17:54:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 17:54:35,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445597145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 17:54:35,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 17:54:35,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 17:54:35,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413751293] [2023-08-03 17:54:35,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 17:54:35,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:54:35,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:54:35,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:54:35,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:54:35,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 17:54:35,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:54:35,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:54:35,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 17:54:35,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:54:58,111 INFO L124 PetriNetUnfolderBase]: 101266/132947 cut-off events. [2023-08-03 17:54:58,112 INFO L125 PetriNetUnfolderBase]: For 9714/9714 co-relation queries the response was YES. [2023-08-03 17:54:58,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272113 conditions, 132947 events. 101266/132947 cut-off events. For 9714/9714 co-relation queries the response was YES. Maximal size of possible extension queue 3956. Compared 835271 event pairs, 66420 based on Foata normal form. 3/132041 useless extension candidates. Maximal degree in co-relation 96489. Up to 127384 conditions per place. [2023-08-03 17:54:58,998 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 42 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-03 17:54:58,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 56 transitions, 265 flow [2023-08-03 17:54:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 17:54:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 17:54:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2023-08-03 17:54:59,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371024734982333 [2023-08-03 17:54:59,000 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2023-08-03 17:54:59,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2023-08-03 17:54:59,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:54:59,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2023-08-03 17:54:59,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 17:54:59,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states 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 17:54:59,004 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states 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 17:54:59,005 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 167 flow. Second operand 4 states and 608 transitions. [2023-08-03 17:54:59,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 56 transitions, 265 flow [2023-08-03 17:54:59,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 56 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 17:54:59,017 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 163 flow [2023-08-03 17:54:59,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-03 17:54:59,018 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-03 17:54:59,018 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 163 flow [2023-08-03 17:54:59,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:54:59,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:54:59,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:54:59,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 17:54:59,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:54:59,225 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 17:54:59,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:54:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1053590101, now seen corresponding path program 1 times [2023-08-03 17:54:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:54:59,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33424177] [2023-08-03 17:54:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:54:59,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:54:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:54:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 17:54:59,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:54:59,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33424177] [2023-08-03 17:54:59,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33424177] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:54:59,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964940979] [2023-08-03 17:54:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:54:59,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:54:59,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:54:59,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:54:59,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 17:54:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:54:59,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 17:54:59,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:54:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 17:54:59,508 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:54:59,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964940979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:54:59,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:54:59,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 17:54:59,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891603588] [2023-08-03 17:54:59,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:54:59,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:54:59,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:54:59,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:54:59,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 17:54:59,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 17:54:59,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:54:59,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:54:59,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 17:54:59,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:55:22,117 INFO L124 PetriNetUnfolderBase]: 100858/132364 cut-off events. [2023-08-03 17:55:22,118 INFO L125 PetriNetUnfolderBase]: For 8611/8611 co-relation queries the response was YES. [2023-08-03 17:55:22,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270244 conditions, 132364 events. 100858/132364 cut-off events. For 8611/8611 co-relation queries the response was YES. Maximal size of possible extension queue 3964. Compared 834215 event pairs, 31342 based on Foata normal form. 144/131599 useless extension candidates. Maximal degree in co-relation 95832. Up to 126018 conditions per place. [2023-08-03 17:55:23,005 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 57 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-03 17:55:23,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 331 flow [2023-08-03 17:55:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 17:55:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 17:55:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 765 transitions. [2023-08-03 17:55:23,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406360424028268 [2023-08-03 17:55:23,008 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 765 transitions. [2023-08-03 17:55:23,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 765 transitions. [2023-08-03 17:55:23,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:55:23,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 765 transitions. [2023-08-03 17:55:23,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 17:55:23,012 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 17:55:23,012 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 17:55:23,012 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 163 flow. Second operand 5 states and 765 transitions. [2023-08-03 17:55:23,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 331 flow [2023-08-03 17:55:23,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 324 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 17:55:23,022 INFO L231 Difference]: Finished difference. Result has 72 places, 49 transitions, 175 flow [2023-08-03 17:55:23,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=72, PETRI_TRANSITIONS=49} [2023-08-03 17:55:23,023 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 11 predicate places. [2023-08-03 17:55:23,023 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 49 transitions, 175 flow [2023-08-03 17:55:23,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:55:23,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:55:23,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:55:23,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 17:55:23,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:55:23,229 INFO L420 AbstractCegarLoop]: === Iteration 7 === 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 17:55:23,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:55:23,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1926214082, now seen corresponding path program 1 times [2023-08-03 17:55:23,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:55:23,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192758393] [2023-08-03 17:55:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:55:23,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:55:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:55:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 17:55:23,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:55:23,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192758393] [2023-08-03 17:55:23,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192758393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:55:23,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471751611] [2023-08-03 17:55:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:55:23,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:55:23,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:55:23,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:55:23,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 17:55:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:55:23,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 17:55:23,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:55:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 17:55:23,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 17:55:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 17:55:23,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471751611] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 17:55:23,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 17:55:23,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 17:55:23,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074343234] [2023-08-03 17:55:23,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 17:55:23,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:55:23,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:55:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:55:23,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:55:23,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-03 17:55:23,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 49 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states 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 17:55:23,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:55:23,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-03 17:55:23,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand