/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-threaded-sum-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:23:11,593 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:23:11,673 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:23:11,681 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:23:11,681 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:23:11,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:23:11,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:23:11,700 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:23:11,701 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:23:11,705 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:23:11,705 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:23:11,705 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:23:11,706 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:23:11,707 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:23:11,707 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:23:11,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:23:11,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:23:11,708 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:23:11,708 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:23:11,708 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:23:11,709 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:23:11,709 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:23:11,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:23:11,709 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:23:11,710 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:23:11,710 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:23:11,710 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:23:11,711 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:23:11,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:23:11,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:23:11,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:23:11,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:23:11,712 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:23:11,712 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:23:11,712 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:23:11,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:23:11,713 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:23:11,713 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:23:11,713 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:23:11,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:23:11,713 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:23:11,713 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:23:11,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:23:11,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:23:11,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:23:11,954 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:23:11,954 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:23:11,955 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-threaded-sum-3.wvr_bound2.c [2023-08-04 03:23:13,152 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:23:13,324 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:23:13,325 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-threaded-sum-3.wvr_bound2.c [2023-08-04 03:23:13,332 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3499e69/c013e21c041d4bfeba6f83b18cb6106e/FLAG58eb2531b [2023-08-04 03:23:13,727 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3499e69/c013e21c041d4bfeba6f83b18cb6106e [2023-08-04 03:23:13,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:23:13,730 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:23:13,731 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:23:13,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:23:13,734 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:23:13,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:13,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b1bed49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13, skipping insertion in model container [2023-08-04 03:23:13,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:13,767 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:23:13,919 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-threaded-sum-3.wvr_bound2.c[3200,3213] [2023-08-04 03:23:13,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:23:13,928 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:23:13,956 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-threaded-sum-3.wvr_bound2.c[3200,3213] [2023-08-04 03:23:13,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:23:13,964 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:23:13,964 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:23:13,970 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:23:13,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13 WrapperNode [2023-08-04 03:23:13,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:23:13,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:23:13,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:23:13,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:23:13,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:13,990 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:14,010 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 130 [2023-08-04 03:23:14,010 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:23:14,011 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:23:14,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:23:14,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:23:14,021 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:14,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:14,023 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:14,023 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:14,030 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:14,035 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:14,036 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:14,037 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:14,040 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:23:14,041 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:23:14,041 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:23:14,041 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:23:14,042 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (1/1) ... [2023-08-04 03:23:14,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:23:14,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:23:14,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 03:23:14,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 03:23:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:23:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:23:14,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:23:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:23:14,119 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:23:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:23:14,119 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:23:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:23:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:23:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:23:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:23:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:23:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:23:14,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:23:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:23:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:23:14,124 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:23:14,241 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:23:14,245 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:23:14,589 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:23:14,657 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:23:14,658 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 03:23:14,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:23:14 BoogieIcfgContainer [2023-08-04 03:23:14,660 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:23:14,663 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:23:14,663 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:23:14,667 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:23:14,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:23:13" (1/3) ... [2023-08-04 03:23:14,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b74588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:23:14, skipping insertion in model container [2023-08-04 03:23:14,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:23:13" (2/3) ... [2023-08-04 03:23:14,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b74588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:23:14, skipping insertion in model container [2023-08-04 03:23:14,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:23:14" (3/3) ... [2023-08-04 03:23:14,669 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-threaded-sum-3.wvr_bound2.c [2023-08-04 03:23:14,678 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:23:14,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:23:14,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:23:14,686 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:23:14,762 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 03:23:14,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 159 transitions, 360 flow [2023-08-04 03:23:14,984 INFO L124 PetriNetUnfolderBase]: 97/622 cut-off events. [2023-08-04 03:23:14,984 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:23:14,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 622 events. 97/622 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3127 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2023-08-04 03:23:14,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 159 transitions, 360 flow [2023-08-04 03:23:15,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 159 transitions, 360 flow [2023-08-04 03:23:15,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:23:15,019 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 159 transitions, 360 flow [2023-08-04 03:23:15,022 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 159 transitions, 360 flow [2023-08-04 03:23:15,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 159 transitions, 360 flow [2023-08-04 03:23:15,083 INFO L124 PetriNetUnfolderBase]: 97/622 cut-off events. [2023-08-04 03:23:15,083 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:23:15,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 622 events. 97/622 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3127 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2023-08-04 03:23:15,095 INFO L119 LiptonReduction]: Number of co-enabled transitions 4238 [2023-08-04 03:23:18,428 INFO L134 LiptonReduction]: Checked pairs total: 9874 [2023-08-04 03:23:18,428 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-04 03:23:18,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:23:18,445 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;@65f954b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:23:18,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:23:18,450 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:23:18,450 INFO L124 PetriNetUnfolderBase]: 2/32 cut-off events. [2023-08-04 03:23:18,450 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:23:18,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:23:18,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 03:23:18,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:23:18,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:23:18,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1410198506, now seen corresponding path program 1 times [2023-08-04 03:23:18,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:23:18,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982655097] [2023-08-04 03:23:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:23:18,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:23:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:23:18,599 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:23:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:23:18,640 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:23:18,641 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:23:18,642 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:23:18,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:23:18,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:23:18,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:23:18,645 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:23:18,647 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:23:18,648 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:23:18,648 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:23:18,683 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 03:23:18,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 196 transitions, 482 flow [2023-08-04 03:23:19,304 INFO L124 PetriNetUnfolderBase]: 887/4087 cut-off events. [2023-08-04 03:23:19,305 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:23:19,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4761 conditions, 4087 events. 887/4087 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 32776 event pairs, 22 based on Foata normal form. 0/3444 useless extension candidates. Maximal degree in co-relation 2413. Up to 192 conditions per place. [2023-08-04 03:23:19,329 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 196 transitions, 482 flow [2023-08-04 03:23:19,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 196 transitions, 482 flow [2023-08-04 03:23:19,351 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:23:19,352 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 196 transitions, 482 flow [2023-08-04 03:23:19,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 196 transitions, 482 flow [2023-08-04 03:23:19,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 196 transitions, 482 flow [2023-08-04 03:23:19,778 INFO L124 PetriNetUnfolderBase]: 887/4087 cut-off events. [2023-08-04 03:23:19,779 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:23:19,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4761 conditions, 4087 events. 887/4087 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 32776 event pairs, 22 based on Foata normal form. 0/3444 useless extension candidates. Maximal degree in co-relation 2413. Up to 192 conditions per place. [2023-08-04 03:23:19,892 INFO L119 LiptonReduction]: Number of co-enabled transitions 10772 [2023-08-04 03:23:23,297 INFO L134 LiptonReduction]: Checked pairs total: 31179 [2023-08-04 03:23:23,297 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-04 03:23:23,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:23:23,306 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;@65f954b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:23:23,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:23:23,316 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:23:23,316 INFO L124 PetriNetUnfolderBase]: 12/122 cut-off events. [2023-08-04 03:23:23,316 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 03:23:23,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:23:23,317 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 03:23:23,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:23:23,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:23:23,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1222544154, now seen corresponding path program 1 times [2023-08-04 03:23:23,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:23:23,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132733125] [2023-08-04 03:23:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:23:23,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:23:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:23:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:23:23,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:23:23,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132733125] [2023-08-04 03:23:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132733125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:23:23,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727060403] [2023-08-04 03:23:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:23:23,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:23:23,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:23:23,492 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:23:23,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:23:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:23:23,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:23:23,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:23:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:23:23,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:23:23,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727060403] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:23:23,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:23:23,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 03:23:23,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753644323] [2023-08-04 03:23:23,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:23:23,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:23:23,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:23:23,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:23:23,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:23:23,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 333 [2023-08-04 03:23:23,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 79 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:23:23,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:23:23,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 333 [2023-08-04 03:23:23,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:23:56,041 INFO L124 PetriNetUnfolderBase]: 373798/474037 cut-off events. [2023-08-04 03:23:56,042 INFO L125 PetriNetUnfolderBase]: For 52345/52345 co-relation queries the response was YES. [2023-08-04 03:23:57,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948677 conditions, 474037 events. 373798/474037 cut-off events. For 52345/52345 co-relation queries the response was YES. Maximal size of possible extension queue 11207. Compared 2963605 event pairs, 153237 based on Foata normal form. 0/288264 useless extension candidates. Maximal degree in co-relation 319505. Up to 444396 conditions per place. [2023-08-04 03:23:59,187 INFO L140 encePairwiseOnDemand]: 328/333 looper letters, 62 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2023-08-04 03:23:59,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 394 flow [2023-08-04 03:23:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:23:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:23:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2023-08-04 03:23:59,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47387387387387386 [2023-08-04 03:23:59,203 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2023-08-04 03:23:59,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2023-08-04 03:23:59,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:23:59,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2023-08-04 03:23:59,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:23:59,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:23:59,222 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:23:59,224 INFO L175 Difference]: Start difference. First operand has 68 places, 79 transitions, 248 flow. Second operand 5 states and 789 transitions. [2023-08-04 03:23:59,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 394 flow [2023-08-04 03:23:59,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:23:59,255 INFO L231 Difference]: Finished difference. Result has 69 places, 80 transitions, 255 flow [2023-08-04 03:23:59,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=69, PETRI_TRANSITIONS=80} [2023-08-04 03:23:59,259 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-08-04 03:23:59,260 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 80 transitions, 255 flow [2023-08-04 03:23:59,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:23:59,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:23:59,261 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:23:59,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 03:23:59,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:23:59,467 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:23:59,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:23:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash -822533553, now seen corresponding path program 1 times [2023-08-04 03:23:59,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:23:59,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392312780] [2023-08-04 03:23:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:23:59,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:23:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:23:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:23:59,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:23:59,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392312780] [2023-08-04 03:23:59,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392312780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:23:59,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:23:59,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:23:59,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907935777] [2023-08-04 03:23:59,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:23:59,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:23:59,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:23:59,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:23:59,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:23:59,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 333 [2023-08-04 03:23:59,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 80 transitions, 255 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:23:59,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:23:59,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 333 [2023-08-04 03:23:59,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:24:29,757 INFO L124 PetriNetUnfolderBase]: 404680/504188 cut-off events. [2023-08-04 03:24:29,758 INFO L125 PetriNetUnfolderBase]: For 48804/48804 co-relation queries the response was YES. [2023-08-04 03:24:31,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003875 conditions, 504188 events. 404680/504188 cut-off events. For 48804/48804 co-relation queries the response was YES. Maximal size of possible extension queue 10958. Compared 2947910 event pairs, 186082 based on Foata normal form. 1/303200 useless extension candidates. Maximal degree in co-relation 247584. Up to 474497 conditions per place. [2023-08-04 03:24:32,884 INFO L140 encePairwiseOnDemand]: 330/333 looper letters, 57 selfloop transitions, 2 changer transitions 3/82 dead transitions. [2023-08-04 03:24:32,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 82 transitions, 382 flow [2023-08-04 03:24:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:24:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:24:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2023-08-04 03:24:32,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4974974974974975 [2023-08-04 03:24:32,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2023-08-04 03:24:32,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2023-08-04 03:24:32,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:24:32,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2023-08-04 03:24:32,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:32,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:32,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:32,900 INFO L175 Difference]: Start difference. First operand has 69 places, 80 transitions, 255 flow. Second operand 3 states and 497 transitions. [2023-08-04 03:24:32,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 82 transitions, 382 flow [2023-08-04 03:24:32,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 82 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:24:32,920 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 238 flow [2023-08-04 03:24:32,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2023-08-04 03:24:32,921 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 03:24:32,921 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 238 flow [2023-08-04 03:24:32,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:32,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:24:32,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:24:32,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:24:32,924 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:24:32,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:24:32,924 INFO L85 PathProgramCache]: Analyzing trace with hash -454610938, now seen corresponding path program 1 times [2023-08-04 03:24:32,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:24:32,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035564168] [2023-08-04 03:24:32,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:24:32,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:24:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:24:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:24:33,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:24:33,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035564168] [2023-08-04 03:24:33,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035564168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:24:33,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617340315] [2023-08-04 03:24:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:24:33,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:24:33,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:24:33,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:24:33,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:24:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:24:33,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:24:33,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:24:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:24:33,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:24:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:24:33,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617340315] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:24:33,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:24:33,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:24:33,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667610521] [2023-08-04 03:24:33,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:24:33,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:24:33,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:24:33,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:24:33,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:24:33,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 333 [2023-08-04 03:24:33,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:33,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:24:33,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 333 [2023-08-04 03:24:33,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:24:57,093 INFO L124 PetriNetUnfolderBase]: 277006/349700 cut-off events. [2023-08-04 03:24:57,094 INFO L125 PetriNetUnfolderBase]: For 28701/28701 co-relation queries the response was YES. [2023-08-04 03:24:58,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693408 conditions, 349700 events. 277006/349700 cut-off events. For 28701/28701 co-relation queries the response was YES. Maximal size of possible extension queue 8507. Compared 2074774 event pairs, 110949 based on Foata normal form. 3/210280 useless extension candidates. Maximal degree in co-relation 277108. Up to 328377 conditions per place. [2023-08-04 03:24:59,354 INFO L140 encePairwiseOnDemand]: 330/333 looper letters, 59 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-08-04 03:24:59,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 373 flow [2023-08-04 03:24:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:24:59,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:24:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 639 transitions. [2023-08-04 03:24:59,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797297297297297 [2023-08-04 03:24:59,357 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 639 transitions. [2023-08-04 03:24:59,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 639 transitions. [2023-08-04 03:24:59,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:24:59,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 639 transitions. [2023-08-04 03:24:59,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:59,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:59,362 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:59,363 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 238 flow. Second operand 4 states and 639 transitions. [2023-08-04 03:24:59,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 373 flow [2023-08-04 03:24:59,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 82 transitions, 369 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:24:59,377 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 235 flow [2023-08-04 03:24:59,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-04 03:24:59,378 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-04 03:24:59,378 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 235 flow [2023-08-04 03:24:59,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:59,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:24:59,379 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:24:59,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 03:24:59,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 03:24:59,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:24:59,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:24:59,581 INFO L85 PathProgramCache]: Analyzing trace with hash -151563300, now seen corresponding path program 1 times [2023-08-04 03:24:59,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:24:59,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940126231] [2023-08-04 03:24:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:24:59,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:24:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:24:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:24:59,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:24:59,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940126231] [2023-08-04 03:24:59,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940126231] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:24:59,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779858693] [2023-08-04 03:24:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:24:59,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:24:59,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:24:59,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:24:59,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:24:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:24:59,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:24:59,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:24:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:24:59,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:24:59,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779858693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:24:59,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:24:59,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:24:59,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885883291] [2023-08-04 03:24:59,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:24:59,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:24:59,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:24:59,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:24:59,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:24:59,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 333 [2023-08-04 03:24:59,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:59,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:24:59,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 333 [2023-08-04 03:24:59,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:25:21,063 INFO L124 PetriNetUnfolderBase]: 286534/356119 cut-off events. [2023-08-04 03:25:21,063 INFO L125 PetriNetUnfolderBase]: For 26239/26239 co-relation queries the response was YES. [2023-08-04 03:25:22,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709373 conditions, 356119 events. 286534/356119 cut-off events. For 26239/26239 co-relation queries the response was YES. Maximal size of possible extension queue 8313. Compared 2044255 event pairs, 60037 based on Foata normal form. 0/212139 useless extension candidates. Maximal degree in co-relation 259386. Up to 336742 conditions per place. [2023-08-04 03:25:23,548 INFO L140 encePairwiseOnDemand]: 329/333 looper letters, 72 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2023-08-04 03:25:23,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 427 flow [2023-08-04 03:25:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:25:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:25:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 797 transitions. [2023-08-04 03:25:23,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786786786786787 [2023-08-04 03:25:23,551 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 797 transitions. [2023-08-04 03:25:23,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 797 transitions. [2023-08-04 03:25:23,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:25:23,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 797 transitions. [2023-08-04 03:25:23,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.4) internal successors, (797), 5 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:25:23,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:25:23,557 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:25:23,557 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 235 flow. Second operand 5 states and 797 transitions. [2023-08-04 03:25:23,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 427 flow [2023-08-04 03:25:23,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 413 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 03:25:23,570 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 238 flow [2023-08-04 03:25:23,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2023-08-04 03:25:23,571 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 03:25:23,571 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 238 flow [2023-08-04 03:25:23,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:25:23,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:25:23,572 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:25:23,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:25:23,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:25:23,777 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:25:23,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:25:23,777 INFO L85 PathProgramCache]: Analyzing trace with hash 251431370, now seen corresponding path program 1 times [2023-08-04 03:25:23,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:25:23,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763581824] [2023-08-04 03:25:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:25:23,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:25:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:25:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:25:23,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:25:23,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763581824] [2023-08-04 03:25:23,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763581824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:25:23,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:25:23,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:25:23,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189405182] [2023-08-04 03:25:23,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:25:23,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:25:23,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:25:23,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:25:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:25:23,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 333 [2023-08-04 03:25:23,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:25:23,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:25:23,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 333 [2023-08-04 03:25:23,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:25:45,768 INFO L124 PetriNetUnfolderBase]: 308632/377650 cut-off events. [2023-08-04 03:25:45,769 INFO L125 PetriNetUnfolderBase]: For 22732/22732 co-relation queries the response was YES. [2023-08-04 03:25:47,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748912 conditions, 377650 events. 308632/377650 cut-off events. For 22732/22732 co-relation queries the response was YES. Maximal size of possible extension queue 8780. Compared 2046040 event pairs, 144396 based on Foata normal form. 9/222612 useless extension candidates. Maximal degree in co-relation 272319. Up to 358986 conditions per place. [2023-08-04 03:25:48,053 INFO L140 encePairwiseOnDemand]: 330/333 looper letters, 59 selfloop transitions, 2 changer transitions 3/83 dead transitions. [2023-08-04 03:25:48,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 377 flow [2023-08-04 03:25:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:25:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:25:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-08-04 03:25:48,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4984984984984985 [2023-08-04 03:25:48,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-08-04 03:25:48,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-08-04 03:25:48,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:25:48,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-08-04 03:25:48,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:25:48,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:25:48,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:25:48,059 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 238 flow. Second operand 3 states and 498 transitions. [2023-08-04 03:25:48,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 377 flow [2023-08-04 03:25:48,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:25:48,066 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 221 flow [2023-08-04 03:25:48,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-08-04 03:25:48,067 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-04 03:25:48,067 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 221 flow [2023-08-04 03:25:48,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:25:48,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:25:48,068 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:25:48,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:25:48,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:25:48,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:25:48,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1146334198, now seen corresponding path program 1 times [2023-08-04 03:25:48,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:25:48,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832529999] [2023-08-04 03:25:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:25:48,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:25:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:25:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:25:48,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:25:48,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832529999] [2023-08-04 03:25:48,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832529999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:25:48,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026695118] [2023-08-04 03:25:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:25:48,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:25:48,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:25:48,120 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:25:48,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:25:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:25:48,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:25:48,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:25:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:25:48,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:25:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:25:48,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026695118] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:25:48,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:25:48,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:25:48,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323910163] [2023-08-04 03:25:48,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:25:48,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:25:48,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:25:48,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:25:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:25:48,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 333 [2023-08-04 03:25:48,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:25:48,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:25:48,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 333 [2023-08-04 03:25:48,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:26:05,572 INFO L124 PetriNetUnfolderBase]: 210930/260823 cut-off events. [2023-08-04 03:26:05,572 INFO L125 PetriNetUnfolderBase]: For 11446/11446 co-relation queries the response was YES. [2023-08-04 03:26:06,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515219 conditions, 260823 events. 210930/260823 cut-off events. For 11446/11446 co-relation queries the response was YES. Maximal size of possible extension queue 6916. Compared 1445597 event pairs, 86833 based on Foata normal form. 27/153340 useless extension candidates. Maximal degree in co-relation 188344. Up to 247160 conditions per place. [2023-08-04 03:26:07,363 INFO L140 encePairwiseOnDemand]: 330/333 looper letters, 65 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-08-04 03:26:07,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 384 flow [2023-08-04 03:26:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:26:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:26:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 644 transitions. [2023-08-04 03:26:07,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48348348348348347 [2023-08-04 03:26:07,366 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 644 transitions. [2023-08-04 03:26:07,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 644 transitions. [2023-08-04 03:26:07,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:26:07,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 644 transitions. [2023-08-04 03:26:07,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:26:07,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:26:07,370 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:26:07,370 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 221 flow. Second operand 4 states and 644 transitions. [2023-08-04 03:26:07,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 384 flow [2023-08-04 03:26:07,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:26:07,378 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 218 flow [2023-08-04 03:26:07,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-08-04 03:26:07,379 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 03:26:07,379 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 218 flow [2023-08-04 03:26:07,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:26:07,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:26:07,380 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:26:07,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:26:07,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:26:07,587 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:26:07,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:26:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1181507135, now seen corresponding path program 1 times [2023-08-04 03:26:07,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:26:07,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994759547] [2023-08-04 03:26:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:26:07,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:26:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:26:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:26:07,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:26:07,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994759547] [2023-08-04 03:26:07,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994759547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:26:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22057169] [2023-08-04 03:26:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:26:07,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:26:07,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:26:07,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:26:07,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:26:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:26:07,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:26:07,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:26:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:26:07,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:26:07,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22057169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:26:07,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:26:07,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:26:07,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640044534] [2023-08-04 03:26:07,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:26:07,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:26:07,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:26:07,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:26:07,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:26:07,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 333 [2023-08-04 03:26:07,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:26:07,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:26:07,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 333 [2023-08-04 03:26:07,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:26:22,970 INFO L124 PetriNetUnfolderBase]: 217308/261288 cut-off events. [2023-08-04 03:26:22,971 INFO L125 PetriNetUnfolderBase]: For 5353/5353 co-relation queries the response was YES. [2023-08-04 03:26:23,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520199 conditions, 261288 events. 217308/261288 cut-off events. For 5353/5353 co-relation queries the response was YES. Maximal size of possible extension queue 6402. Compared 1327405 event pairs, 1045 based on Foata normal form. 0/151909 useless extension candidates. Maximal degree in co-relation 189428. Up to 234717 conditions per place. [2023-08-04 03:26:24,019 INFO L140 encePairwiseOnDemand]: 329/333 looper letters, 0 selfloop transitions, 0 changer transitions 108/108 dead transitions. [2023-08-04 03:26:24,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 466 flow [2023-08-04 03:26:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:26:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:26:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 809 transitions. [2023-08-04 03:26:24,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858858858858859 [2023-08-04 03:26:24,021 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 809 transitions. [2023-08-04 03:26:24,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 809 transitions. [2023-08-04 03:26:24,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:26:24,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 809 transitions. [2023-08-04 03:26:24,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.8) internal successors, (809), 5 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:26:24,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:26:24,026 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:26:24,026 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 218 flow. Second operand 5 states and 809 transitions. [2023-08-04 03:26:24,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 466 flow [2023-08-04 03:26:24,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 452 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 03:26:24,066 INFO L231 Difference]: Finished difference. Result has 70 places, 0 transitions, 0 flow [2023-08-04 03:26:24,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=70, PETRI_TRANSITIONS=0} [2023-08-04 03:26:24,067 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 03:26:24,067 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 0 transitions, 0 flow [2023-08-04 03:26:24,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:26:24,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:26:24,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:26:24,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:26:24,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 03:26:24,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:26:24,274 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:26:24,275 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:26:24,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 196 transitions, 482 flow [2023-08-04 03:26:24,645 INFO L124 PetriNetUnfolderBase]: 887/4087 cut-off events. [2023-08-04 03:26:24,645 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:26:24,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4761 conditions, 4087 events. 887/4087 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 32776 event pairs, 22 based on Foata normal form. 0/3444 useless extension candidates. Maximal degree in co-relation 2413. Up to 192 conditions per place. [2023-08-04 03:26:24,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 196 transitions, 482 flow [2023-08-04 03:26:24,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 196 transitions, 482 flow [2023-08-04 03:26:24,707 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:26:24,707 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 196 transitions, 482 flow [2023-08-04 03:26:24,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 196 transitions, 482 flow [2023-08-04 03:26:24,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 196 transitions, 482 flow [2023-08-04 03:26:25,061 INFO L124 PetriNetUnfolderBase]: 887/4087 cut-off events. [2023-08-04 03:26:25,062 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:26:25,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4761 conditions, 4087 events. 887/4087 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 32776 event pairs, 22 based on Foata normal form. 0/3444 useless extension candidates. Maximal degree in co-relation 2413. Up to 192 conditions per place. [2023-08-04 03:26:25,154 INFO L119 LiptonReduction]: Number of co-enabled transitions 10772 [2023-08-04 03:26:28,453 INFO L134 LiptonReduction]: Checked pairs total: 34235 [2023-08-04 03:26:28,453 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-04 03:26:28,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:26:28,455 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;@65f954b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:26:28,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:26:28,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:26:28,457 INFO L124 PetriNetUnfolderBase]: 2/31 cut-off events. [2023-08-04 03:26:28,457 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:26:28,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:26:28,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:26:28,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:26:28,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:26:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash 191799303, now seen corresponding path program 1 times [2023-08-04 03:26:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:26:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809468516] [2023-08-04 03:26:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:26:28,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:26:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:26:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:26:28,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:26:28,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809468516] [2023-08-04 03:26:28,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809468516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:26:28,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:26:28,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:26:28,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592990925] [2023-08-04 03:26:28,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:26:28,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:26:28,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:26:28,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:26:28,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:26:28,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 334 [2023-08-04 03:26:28,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 79 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:26:28,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:26:28,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 334 [2023-08-04 03:26:28,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:26:58,256 INFO L124 PetriNetUnfolderBase]: 404692/504242 cut-off events. [2023-08-04 03:26:58,256 INFO L125 PetriNetUnfolderBase]: For 56460/56460 co-relation queries the response was YES. [2023-08-04 03:27:00,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008735 conditions, 504242 events. 404692/504242 cut-off events. For 56460/56460 co-relation queries the response was YES. Maximal size of possible extension queue 10817. Compared 2945425 event pairs, 186088 based on Foata normal form. 0/303217 useless extension candidates. Maximal degree in co-relation 354059. Up to 474524 conditions per place. [2023-08-04 03:27:01,917 INFO L140 encePairwiseOnDemand]: 330/334 looper letters, 59 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-04 03:27:01,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 376 flow [2023-08-04 03:27:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:27:01,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:27:01,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-08-04 03:27:01,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49700598802395207 [2023-08-04 03:27:01,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-08-04 03:27:01,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-08-04 03:27:01,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:27:01,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-08-04 03:27:01,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:27:01,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:27:01,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:27:01,922 INFO L175 Difference]: Start difference. First operand has 68 places, 79 transitions, 248 flow. Second operand 3 states and 498 transitions. [2023-08-04 03:27:01,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 376 flow [2023-08-04 03:27:01,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:27:01,956 INFO L231 Difference]: Finished difference. Result has 70 places, 79 transitions, 258 flow [2023-08-04 03:27:01,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=70, PETRI_TRANSITIONS=79} [2023-08-04 03:27:01,957 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 03:27:01,957 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 79 transitions, 258 flow [2023-08-04 03:27:01,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:27:01,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:27:01,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:27:01,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 03:27:01,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:27:01,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:27:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1826543474, now seen corresponding path program 1 times [2023-08-04 03:27:01,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:27:01,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417234356] [2023-08-04 03:27:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:27:01,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:27:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:27:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:27:01,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:27:01,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417234356] [2023-08-04 03:27:01,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417234356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:27:01,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411753890] [2023-08-04 03:27:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:27:01,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:27:01,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:27:01,992 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:27:01,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 03:27:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:27:02,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:27:02,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:27:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:27:02,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:27:02,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411753890] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:27:02,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:27:02,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 03:27:02,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610181007] [2023-08-04 03:27:02,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:27:02,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:27:02,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:27:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:27:02,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:27:02,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 334 [2023-08-04 03:27:02,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 79 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:27:02,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:27:02,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 334 [2023-08-04 03:27:02,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:27:35,541 INFO L124 PetriNetUnfolderBase]: 401720/498858 cut-off events. [2023-08-04 03:27:35,541 INFO L125 PetriNetUnfolderBase]: For 57870/57870 co-relation queries the response was YES. [2023-08-04 03:27:37,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 999719 conditions, 498858 events. 401720/498858 cut-off events. For 57870/57870 co-relation queries the response was YES. Maximal size of possible extension queue 11133. Compared 2904306 event pairs, 185064 based on Foata normal form. 0/299352 useless extension candidates. Maximal degree in co-relation 999682. Up to 470355 conditions per place. [2023-08-04 03:27:39,647 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 64 selfloop transitions, 2 changer transitions 1/87 dead transitions. [2023-08-04 03:27:39,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 87 transitions, 406 flow [2023-08-04 03:27:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:27:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:27:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-04 03:27:39,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-04 03:27:39,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-04 03:27:39,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-04 03:27:39,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:27:39,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-04 03:27:39,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:27:39,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:27:39,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:27:39,653 INFO L175 Difference]: Start difference. First operand has 70 places, 79 transitions, 258 flow. Second operand 3 states and 501 transitions. [2023-08-04 03:27:39,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 87 transitions, 406 flow [2023-08-04 03:27:39,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 404 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:27:39,682 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 262 flow [2023-08-04 03:27:39,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-04 03:27:39,682 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 03:27:39,682 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 262 flow [2023-08-04 03:27:39,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:27:39,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:27:39,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:27:39,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 03:27:39,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:27:39,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:27:39,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:27:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1946306423, now seen corresponding path program 1 times [2023-08-04 03:27:39,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:27:39,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759982220] [2023-08-04 03:27:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:27:39,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:27:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:27:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:27:39,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:27:39,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759982220] [2023-08-04 03:27:39,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759982220] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:27:39,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738447856] [2023-08-04 03:27:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:27:39,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:27:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:27:39,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:27:39,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 03:27:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:27:39,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:27:39,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:27:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:27:40,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:27:40,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738447856] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:27:40,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:27:40,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 03:27:40,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203405262] [2023-08-04 03:27:40,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:27:40,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:27:40,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:27:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:27:40,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:27:40,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 334 [2023-08-04 03:27:40,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:27:40,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:27:40,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 334 [2023-08-04 03:27:40,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:13,457 INFO L124 PetriNetUnfolderBase]: 409434/506805 cut-off events. [2023-08-04 03:28:13,457 INFO L125 PetriNetUnfolderBase]: For 47495/47495 co-relation queries the response was YES. [2023-08-04 03:28:15,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015642 conditions, 506805 events. 409434/506805 cut-off events. For 47495/47495 co-relation queries the response was YES. Maximal size of possible extension queue 11642. Compared 2978023 event pairs, 177322 based on Foata normal form. 0/303302 useless extension candidates. Maximal degree in co-relation 347713. Up to 473307 conditions per place. [2023-08-04 03:28:17,519 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 70 selfloop transitions, 2 changer transitions 1/92 dead transitions. [2023-08-04 03:28:17,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 92 transitions, 432 flow [2023-08-04 03:28:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:28:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:28:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-04 03:28:17,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049900199600799 [2023-08-04 03:28:17,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-04 03:28:17,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-04 03:28:17,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:17,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-04 03:28:17,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:28:17,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:28:17,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:28:17,523 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 262 flow. Second operand 3 states and 506 transitions. [2023-08-04 03:28:17,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 92 transitions, 432 flow [2023-08-04 03:28:17,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 92 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:28:17,568 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 262 flow [2023-08-04 03:28:17,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-04 03:28:17,568 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 03:28:17,569 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 262 flow [2023-08-04 03:28:17,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:28:17,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:17,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:17,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 03:28:17,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:17,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:17,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1138484602, now seen corresponding path program 1 times [2023-08-04 03:28:17,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:17,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050036447] [2023-08-04 03:28:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:17,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:28:17,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:17,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050036447] [2023-08-04 03:28:17,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050036447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:17,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601337947] [2023-08-04 03:28:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:17,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:17,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:17,816 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:28:17,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 03:28:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:17,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:28:17,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:28:17,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:28:17,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601337947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:17,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:28:17,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 03:28:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177575003] [2023-08-04 03:28:17,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:17,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:28:17,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:17,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:28:17,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:28:17,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 334 [2023-08-04 03:28:17,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:28:17,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:17,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 334 [2023-08-04 03:28:17,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:48,211 INFO L124 PetriNetUnfolderBase]: 379988/460506 cut-off events. [2023-08-04 03:28:48,212 INFO L125 PetriNetUnfolderBase]: For 28471/28471 co-relation queries the response was YES. [2023-08-04 03:28:49,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937651 conditions, 460506 events. 379988/460506 cut-off events. For 28471/28471 co-relation queries the response was YES. Maximal size of possible extension queue 9404. Compared 2469212 event pairs, 157404 based on Foata normal form. 0/275999 useless extension candidates. Maximal degree in co-relation 347665. Up to 367789 conditions per place. [2023-08-04 03:28:51,585 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 80 selfloop transitions, 2 changer transitions 1/101 dead transitions. [2023-08-04 03:28:51,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 487 flow [2023-08-04 03:28:51,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:28:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:28:51,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-04 03:28:51,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5139720558882236 [2023-08-04 03:28:51,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-04 03:28:51,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-04 03:28:51,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:51,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-04 03:28:51,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:28:51,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:28:51,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:28:51,590 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 262 flow. Second operand 3 states and 515 transitions. [2023-08-04 03:28:51,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 487 flow [2023-08-04 03:28:51,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:28:51,852 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 262 flow [2023-08-04 03:28:51,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-04 03:28:51,853 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 03:28:51,853 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 262 flow [2023-08-04 03:28:51,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:28:51,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:51,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:51,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 03:28:52,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 03:28:52,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:52,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:52,055 INFO L85 PathProgramCache]: Analyzing trace with hash 298065589, now seen corresponding path program 1 times [2023-08-04 03:28:52,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:52,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148577831] [2023-08-04 03:28:52,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:52,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:28:52,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:52,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148577831] [2023-08-04 03:28:52,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148577831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:52,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282407201] [2023-08-04 03:28:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:52,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:52,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:52,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:28:52,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 03:28:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:52,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:28:52,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:28:52,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:28:52,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282407201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:52,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:28:52,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 03:28:52,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278951520] [2023-08-04 03:28:52,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:52,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:28:52,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:52,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:28:52,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:28:52,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 334 [2023-08-04 03:28:52,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:28:52,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:52,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 334 [2023-08-04 03:28:52,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:19,504 INFO L124 PetriNetUnfolderBase]: 349500/427243 cut-off events. [2023-08-04 03:29:19,504 INFO L125 PetriNetUnfolderBase]: For 46871/46871 co-relation queries the response was YES. [2023-08-04 03:29:21,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888083 conditions, 427243 events. 349500/427243 cut-off events. For 46871/46871 co-relation queries the response was YES. Maximal size of possible extension queue 7753. Compared 2320728 event pairs, 143070 based on Foata normal form. 0/264440 useless extension candidates. Maximal degree in co-relation 348291. Up to 323525 conditions per place. [2023-08-04 03:29:22,707 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 81 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-04 03:29:22,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 488 flow [2023-08-04 03:29:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:29:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:29:22,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-04 03:29:22,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5139720558882236 [2023-08-04 03:29:22,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-04 03:29:22,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-04 03:29:22,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:22,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-04 03:29:22,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:22,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:22,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:22,712 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 262 flow. Second operand 3 states and 515 transitions. [2023-08-04 03:29:22,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 488 flow [2023-08-04 03:29:23,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 481 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:29:23,128 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 268 flow [2023-08-04 03:29:23,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2023-08-04 03:29:23,129 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2023-08-04 03:29:23,129 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 268 flow [2023-08-04 03:29:23,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:23,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:23,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:23,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 03:29:23,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 03:29:23,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:23,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1707060555, now seen corresponding path program 1 times [2023-08-04 03:29:23,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:23,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476263972] [2023-08-04 03:29:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:23,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:29:23,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:23,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476263972] [2023-08-04 03:29:23,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476263972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:23,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162517961] [2023-08-04 03:29:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:23,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:23,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:23,390 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:29:23,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 03:29:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:23,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:29:23,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:29:23,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:29:23,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162517961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:29:23,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:29:23,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 03:29:23,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227506723] [2023-08-04 03:29:23,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:29:23,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:29:23,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:23,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:29:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:29:23,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 334 [2023-08-04 03:29:23,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:23,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:23,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 334 [2023-08-04 03:29:23,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:53,522 INFO L124 PetriNetUnfolderBase]: 347013/425159 cut-off events. [2023-08-04 03:29:53,522 INFO L125 PetriNetUnfolderBase]: For 47081/47081 co-relation queries the response was YES. [2023-08-04 03:29:55,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893906 conditions, 425159 events. 347013/425159 cut-off events. For 47081/47081 co-relation queries the response was YES. Maximal size of possible extension queue 7531. Compared 2314832 event pairs, 164315 based on Foata normal form. 0/267993 useless extension candidates. Maximal degree in co-relation 505416. Up to 370052 conditions per place. [2023-08-04 03:29:56,894 INFO L140 encePairwiseOnDemand]: 331/334 looper letters, 82 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2023-08-04 03:29:56,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 495 flow [2023-08-04 03:29:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:29:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:29:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-04 03:29:56,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5139720558882236 [2023-08-04 03:29:56,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-04 03:29:56,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-04 03:29:56,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:56,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-04 03:29:56,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:56,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:56,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:56,899 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 268 flow. Second operand 3 states and 515 transitions. [2023-08-04 03:29:56,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 495 flow [2023-08-04 03:30:09,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:30:09,190 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 278 flow [2023-08-04 03:30:09,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2023-08-04 03:30:09,191 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-08-04 03:30:09,191 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 278 flow [2023-08-04 03:30:09,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:09,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:09,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:30:09,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 03:30:09,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 03:30:09,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:30:09,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:09,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1088596690, now seen corresponding path program 1 times [2023-08-04 03:30:09,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:09,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855298327] [2023-08-04 03:30:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:09,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:30:09,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:30:09,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855298327] [2023-08-04 03:30:09,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855298327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:30:09,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031254355] [2023-08-04 03:30:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:09,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:30:09,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:30:09,478 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:30:09,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 03:30:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:09,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:30:09,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:30:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:30:09,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:30:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:30:09,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031254355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:30:09,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:30:09,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:30:09,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872364276] [2023-08-04 03:30:09,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:30:09,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:30:09,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:09,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:30:09,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:30:09,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 334 [2023-08-04 03:30:09,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:09,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:09,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 334 [2023-08-04 03:30:09,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand