/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-max-array-hom.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:25:15,763 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:25:15,837 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:25:15,843 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:25:15,843 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:25:15,844 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:25:15,844 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:25:15,872 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:25:15,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:25:15,876 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:25:15,876 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:25:15,877 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:25:15,877 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:25:15,879 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:25:15,879 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:25:15,879 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:25:15,879 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:25:15,880 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:25:15,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:25:15,880 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:25:15,880 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:25:15,881 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:25:15,881 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:25:15,881 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:25:15,881 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:25:15,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:25:15,883 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:25:15,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:25:15,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:25:15,884 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:25:15,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:25:15,885 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:25:15,885 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:25:15,885 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:25:15,885 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:25:15,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:25:15,886 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:25:15,886 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:25:15,886 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:25:15,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:25:15,886 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:25:15,887 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:25:16,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:25:16,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:25:16,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:25:16,153 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:25:16,153 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:25:16,154 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-max-array-hom.wvr_bound2.c [2023-08-04 09:25:17,386 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:25:17,570 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:25:17,571 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-max-array-hom.wvr_bound2.c [2023-08-04 09:25:17,577 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0e5b5cac/862262bf3eec444fbceec089d8fc9caf/FLAG992db1bd0 [2023-08-04 09:25:17,589 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0e5b5cac/862262bf3eec444fbceec089d8fc9caf [2023-08-04 09:25:17,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:25:17,593 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:25:17,594 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:25:17,594 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:25:17,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:25:17,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b2a1e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17, skipping insertion in model container [2023-08-04 09:25:17,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,630 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:25:17,823 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-more-max-array-hom.wvr_bound2.c[2829,2842] [2023-08-04 09:25:17,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:25:17,844 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:25:17,881 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-more-max-array-hom.wvr_bound2.c[2829,2842] [2023-08-04 09:25:17,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:25:17,893 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:25:17,894 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:25:17,899 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:25:17,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17 WrapperNode [2023-08-04 09:25:17,900 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:25:17,902 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:25:17,902 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:25:17,902 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:25:17,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,926 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,952 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 153 [2023-08-04 09:25:17,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:25:17,953 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:25:17,953 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:25:17,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:25:17,961 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,975 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,980 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,983 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,995 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,997 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:17,999 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:25:18,000 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:25:18,000 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:25:18,000 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:25:18,001 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (1/1) ... [2023-08-04 09:25:18,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:25:18,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:25:18,032 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 09:25:18,053 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 09:25:18,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:25:18,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:25:18,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:25:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:25:18,066 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:25:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:25:18,066 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:25:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:25:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:25:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:25:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:25:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:25:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:25:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:25:18,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:25:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:25:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:25:18,070 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 09:25:18,193 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:25:18,195 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:25:18,434 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:25:18,523 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:25:18,523 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 09:25:18,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:25:18 BoogieIcfgContainer [2023-08-04 09:25:18,526 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:25:18,534 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:25:18,534 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:25:18,537 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:25:18,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:25:17" (1/3) ... [2023-08-04 09:25:18,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a1b37f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:25:18, skipping insertion in model container [2023-08-04 09:25:18,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:25:17" (2/3) ... [2023-08-04 09:25:18,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a1b37f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:25:18, skipping insertion in model container [2023-08-04 09:25:18,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:25:18" (3/3) ... [2023-08-04 09:25:18,539 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-max-array-hom.wvr_bound2.c [2023-08-04 09:25:18,546 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:25:18,556 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:25:18,556 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:25:18,556 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:25:18,654 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:25:18,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:18,843 INFO L124 PetriNetUnfolderBase]: 101/661 cut-off events. [2023-08-04 09:25:18,844 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:25:18,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 101/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3250 event pairs, 0 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 386. Up to 16 conditions per place. [2023-08-04 09:25:18,861 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:18,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:18,875 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:25:18,887 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:18,890 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:18,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:18,977 INFO L124 PetriNetUnfolderBase]: 101/661 cut-off events. [2023-08-04 09:25:18,977 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:25:18,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 101/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3250 event pairs, 0 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 386. Up to 16 conditions per place. [2023-08-04 09:25:18,990 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 09:25:24,230 INFO L134 LiptonReduction]: Checked pairs total: 8734 [2023-08-04 09:25:24,230 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-04 09:25:24,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:25:24,247 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;@788db3e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:25:24,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:25:24,252 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:25:24,252 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 09:25:24,252 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:25:24,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:25:24,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:25:24,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:25:24,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:25:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash 279666596, now seen corresponding path program 1 times [2023-08-04 09:25:24,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:25:24,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881153487] [2023-08-04 09:25:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:24,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:25:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:24,546 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 09:25:24,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:25:24,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881153487] [2023-08-04 09:25:24,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881153487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:25:24,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:25:24,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:25:24,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96005805] [2023-08-04 09:25:24,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:25:24,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:25:24,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:25:24,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:25:24,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:25:24,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 361 [2023-08-04 09:25:24,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states 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 09:25:24,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:25:24,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 361 [2023-08-04 09:25:24,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:25:24,934 INFO L124 PetriNetUnfolderBase]: 2189/3068 cut-off events. [2023-08-04 09:25:24,934 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-08-04 09:25:24,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6193 conditions, 3068 events. 2189/3068 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14059 event pairs, 825 based on Foata normal form. 0/1763 useless extension candidates. Maximal degree in co-relation 4980. Up to 2908 conditions per place. [2023-08-04 09:25:24,952 INFO L140 encePairwiseOnDemand]: 357/361 looper letters, 39 selfloop transitions, 2 changer transitions 4/51 dead transitions. [2023-08-04 09:25:24,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 228 flow [2023-08-04 09:25:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:25:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:25:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-04 09:25:24,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48107109879963067 [2023-08-04 09:25:24,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-04 09:25:24,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-04 09:25:24,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:25:24,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-04 09:25:24,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 09:25:24,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:24,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:24,993 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 140 flow. Second operand 3 states and 521 transitions. [2023-08-04 09:25:24,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 228 flow [2023-08-04 09:25:24,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:25:24,999 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 134 flow [2023-08-04 09:25:25,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-04 09:25:25,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 09:25:25,004 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 134 flow [2023-08-04 09:25:25,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states 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 09:25:25,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:25:25,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:25:25,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:25:25,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:25:25,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:25:25,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1059054864, now seen corresponding path program 1 times [2023-08-04 09:25:25,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:25:25,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477770219] [2023-08-04 09:25:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:25,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:25:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:25,082 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 09:25:25,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:25:25,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477770219] [2023-08-04 09:25:25,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477770219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:25:25,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882415985] [2023-08-04 09:25:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:25,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:25:25,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:25:25,086 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 09:25:25,106 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 09:25:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:25,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:25:25,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:25:25,192 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 09:25:25,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:25:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882415985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:25:25,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:25:25,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:25:25,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261100237] [2023-08-04 09:25:25,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:25:25,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:25:25,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:25:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:25:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:25:25,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 361 [2023-08-04 09:25:25,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states 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 09:25:25,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:25:25,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 361 [2023-08-04 09:25:25,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:25:25,560 INFO L124 PetriNetUnfolderBase]: 2097/2911 cut-off events. [2023-08-04 09:25:25,560 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-08-04 09:25:25,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5883 conditions, 2911 events. 2097/2911 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12766 event pairs, 970 based on Foata normal form. 0/1671 useless extension candidates. Maximal degree in co-relation 4671. Up to 2757 conditions per place. [2023-08-04 09:25:25,578 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 41 selfloop transitions, 2 changer transitions 1/50 dead transitions. [2023-08-04 09:25:25,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 232 flow [2023-08-04 09:25:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:25:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:25:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-04 09:25:25,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.481994459833795 [2023-08-04 09:25:25,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-04 09:25:25,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-04 09:25:25,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:25:25,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-04 09:25:25,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states 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 09:25:25,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:25,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:25,588 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 134 flow. Second operand 3 states and 522 transitions. [2023-08-04 09:25:25,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 232 flow [2023-08-04 09:25:25,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 216 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:25:25,591 INFO L231 Difference]: Finished difference. Result has 40 places, 45 transitions, 126 flow [2023-08-04 09:25:25,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=45} [2023-08-04 09:25:25,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-08-04 09:25:25,592 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 45 transitions, 126 flow [2023-08-04 09:25:25,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states 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 09:25:25,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:25:25,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:25:25,601 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 09:25:25,801 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 09:25:25,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:25:25,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:25:25,803 INFO L85 PathProgramCache]: Analyzing trace with hash -52248654, now seen corresponding path program 1 times [2023-08-04 09:25:25,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:25:25,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655987610] [2023-08-04 09:25:25,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:25,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:25:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:25,871 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 09:25:25,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:25:25,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655987610] [2023-08-04 09:25:25,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655987610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:25:25,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892149826] [2023-08-04 09:25:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:25,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:25:25,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:25:25,874 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 09:25:25,876 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 09:25:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:25,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:25:25,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:25:25,978 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 09:25:25,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:25:25,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892149826] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:25:25,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:25:25,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:25:25,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166722235] [2023-08-04 09:25:25,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:25:25,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:25:25,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:25:25,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:25:25,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:25:25,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 361 [2023-08-04 09:25:25,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 45 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states 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 09:25:25,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:25:25,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 361 [2023-08-04 09:25:25,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:25:26,270 INFO L124 PetriNetUnfolderBase]: 2088/2902 cut-off events. [2023-08-04 09:25:26,270 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 09:25:26,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5874 conditions, 2902 events. 2088/2902 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12753 event pairs, 789 based on Foata normal form. 0/1680 useless extension candidates. Maximal degree in co-relation 2270. Up to 2638 conditions per place. [2023-08-04 09:25:26,287 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 43 selfloop transitions, 2 changer transitions 1/52 dead transitions. [2023-08-04 09:25:26,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 232 flow [2023-08-04 09:25:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:25:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:25:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-08-04 09:25:26,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838411819021237 [2023-08-04 09:25:26,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-08-04 09:25:26,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-08-04 09:25:26,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:25:26,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-08-04 09:25:26,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 09:25:26,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:26,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:26,295 INFO L175 Difference]: Start difference. First operand has 40 places, 45 transitions, 126 flow. Second operand 3 states and 524 transitions. [2023-08-04 09:25:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 232 flow [2023-08-04 09:25:26,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:25:26,299 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 130 flow [2023-08-04 09:25:26,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2023-08-04 09:25:26,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-08-04 09:25:26,300 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 130 flow [2023-08-04 09:25:26,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states 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 09:25:26,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:25:26,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:25:26,309 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 09:25:26,509 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,SelfDestructingSolverStorable2 [2023-08-04 09:25:26,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:25:26,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:25:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1737764500, now seen corresponding path program 1 times [2023-08-04 09:25:26,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:25:26,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690977820] [2023-08-04 09:25:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:26,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:25:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:26,599 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 09:25:26,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:25:26,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690977820] [2023-08-04 09:25:26,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690977820] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:25:26,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664532500] [2023-08-04 09:25:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:26,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:25:26,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:25:26,606 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 09:25:26,608 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 09:25:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:26,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:25:26,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:25:26,696 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 09:25:26,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:25:26,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664532500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:25:26,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:25:26,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:25:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572394544] [2023-08-04 09:25:26,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:25:26,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:25:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:25:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:25:26,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:25:26,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 361 [2023-08-04 09:25:26,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 09:25:26,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:25:26,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 361 [2023-08-04 09:25:26,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:25:26,898 INFO L124 PetriNetUnfolderBase]: 1350/1921 cut-off events. [2023-08-04 09:25:26,901 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 09:25:26,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3976 conditions, 1921 events. 1350/1921 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7763 event pairs, 492 based on Foata normal form. 0/1146 useless extension candidates. Maximal degree in co-relation 1654. Up to 1483 conditions per place. [2023-08-04 09:25:26,911 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 48 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-04 09:25:26,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 258 flow [2023-08-04 09:25:26,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:25:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:25:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-04 09:25:26,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48753462603878117 [2023-08-04 09:25:26,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-04 09:25:26,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-04 09:25:26,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:25:26,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-04 09:25:26,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 09:25:26,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:26,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:26,921 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 130 flow. Second operand 3 states and 528 transitions. [2023-08-04 09:25:26,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 258 flow [2023-08-04 09:25:26,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:25:26,925 INFO L231 Difference]: Finished difference. Result has 42 places, 46 transitions, 138 flow [2023-08-04 09:25:26,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=42, PETRI_TRANSITIONS=46} [2023-08-04 09:25:26,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-04 09:25:26,927 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 46 transitions, 138 flow [2023-08-04 09:25:26,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 09:25:26,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:25:26,927 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] [2023-08-04 09:25:26,933 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 09:25:27,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:25:27,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:25:27,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:25:27,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1922422427, now seen corresponding path program 1 times [2023-08-04 09:25:27,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:25:27,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901148548] [2023-08-04 09:25:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:27,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:25:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:27,218 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 09:25:27,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:25:27,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901148548] [2023-08-04 09:25:27,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901148548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:25:27,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885407677] [2023-08-04 09:25:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:27,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:25:27,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:25:27,221 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 09:25:27,223 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 09:25:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:27,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:25:27,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:25:27,316 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 09:25:27,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:25:27,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885407677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:25:27,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:25:27,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:25:27,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008070658] [2023-08-04 09:25:27,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:25:27,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:25:27,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:25:27,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:25:27,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:25:27,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 361 [2023-08-04 09:25:27,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 46 transitions, 138 flow. Second operand has 3 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 09:25:27,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:25:27,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 361 [2023-08-04 09:25:27,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:25:27,535 INFO L124 PetriNetUnfolderBase]: 1121/1615 cut-off events. [2023-08-04 09:25:27,535 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-04 09:25:27,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3459 conditions, 1615 events. 1121/1615 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6318 event pairs, 454 based on Foata normal form. 0/1033 useless extension candidates. Maximal degree in co-relation 1414. Up to 1279 conditions per place. [2023-08-04 09:25:27,544 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 49 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 09:25:27,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 268 flow [2023-08-04 09:25:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:25:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:25:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-04 09:25:27,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48753462603878117 [2023-08-04 09:25:27,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-04 09:25:27,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-04 09:25:27,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:25:27,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-04 09:25:27,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 09:25:27,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:27,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:27,553 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 138 flow. Second operand 3 states and 528 transitions. [2023-08-04 09:25:27,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 268 flow [2023-08-04 09:25:27,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:25:27,558 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 148 flow [2023-08-04 09:25:27,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2023-08-04 09:25:27,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-04 09:25:27,560 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 148 flow [2023-08-04 09:25:27,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 09:25:27,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:25:27,561 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] [2023-08-04 09:25:27,566 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 09:25:27,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:25:27,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:25:27,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:25:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash 737111107, now seen corresponding path program 1 times [2023-08-04 09:25:27,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:25:27,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742705397] [2023-08-04 09:25:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:27,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:25:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:27,846 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 09:25:27,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:25:27,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742705397] [2023-08-04 09:25:27,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742705397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:25:27,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105070279] [2023-08-04 09:25:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:27,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:25:27,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:25:27,848 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 09:25:27,848 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 09:25:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:27,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:25:27,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:25:27,951 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 09:25:27,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:25:27,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105070279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:25:27,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:25:27,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:25:27,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012242890] [2023-08-04 09:25:27,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:25:27,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:25:27,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:25:27,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:25:27,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:25:27,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 361 [2023-08-04 09:25:27,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 09:25:27,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:25:27,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 361 [2023-08-04 09:25:27,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:25:28,124 INFO L124 PetriNetUnfolderBase]: 1108/1595 cut-off events. [2023-08-04 09:25:28,124 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-04 09:25:28,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3461 conditions, 1595 events. 1108/1595 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6179 event pairs, 527 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 2560. Up to 1487 conditions per place. [2023-08-04 09:25:28,132 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 43 selfloop transitions, 2 changer transitions 3/54 dead transitions. [2023-08-04 09:25:28,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 258 flow [2023-08-04 09:25:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:25:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:25:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-08-04 09:25:28,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838411819021237 [2023-08-04 09:25:28,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-08-04 09:25:28,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-08-04 09:25:28,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:25:28,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-08-04 09:25:28,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 09:25:28,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:28,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 09:25:28,138 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 148 flow. Second operand 3 states and 524 transitions. [2023-08-04 09:25:28,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 258 flow [2023-08-04 09:25:28,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:25:28,141 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 146 flow [2023-08-04 09:25:28,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-04 09:25:28,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-04 09:25:28,142 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 146 flow [2023-08-04 09:25:28,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 09:25:28,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:25:28,143 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] [2023-08-04 09:25:28,151 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 09:25:28,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:25:28,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:25:28,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:25:28,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2091213936, now seen corresponding path program 1 times [2023-08-04 09:25:28,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:25:28,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772094893] [2023-08-04 09:25:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:28,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:25:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:28,402 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 09:25:28,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:25:28,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772094893] [2023-08-04 09:25:28,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772094893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:25:28,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605077109] [2023-08-04 09:25:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:28,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:25:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:25:28,404 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 09:25:28,407 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 09:25:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:28,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:25:28,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:25:28,548 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 09:25:28,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:25:28,573 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 09:25:28,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605077109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:25:28,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:25:28,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:25:28,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628892708] [2023-08-04 09:25:28,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:25:28,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:25:28,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:25:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:25:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:25:28,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 361 [2023-08-04 09:25:28,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 164.8) internal successors, (824), 5 states have internal predecessors, (824), 0 states have call successors, (0), 0 states 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 09:25:28,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:25:28,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 361 [2023-08-04 09:25:28,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:25:28,613 INFO L124 PetriNetUnfolderBase]: 9/21 cut-off events. [2023-08-04 09:25:28,614 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:25:28,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 21 events. 9/21 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 44. Up to 13 conditions per place. [2023-08-04 09:25:28,614 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2023-08-04 09:25:28,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 12 transitions, 50 flow [2023-08-04 09:25:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:25:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:25:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 644 transitions. [2023-08-04 09:25:28,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44598337950138506 [2023-08-04 09:25:28,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 644 transitions. [2023-08-04 09:25:28,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 644 transitions. [2023-08-04 09:25:28,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:25:28,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 644 transitions. [2023-08-04 09:25:28,618 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 09:25:28,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 361.0) internal successors, (1805), 5 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states 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 09:25:28,621 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 361.0) internal successors, (1805), 5 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states 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 09:25:28,621 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 146 flow. Second operand 4 states and 644 transitions. [2023-08-04 09:25:28,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 12 transitions, 50 flow [2023-08-04 09:25:28,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 48 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:25:28,622 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 09:25:28,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-04 09:25:28,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -23 predicate places. [2023-08-04 09:25:28,622 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 09:25:28,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.8) internal successors, (824), 5 states have internal predecessors, (824), 0 states have call successors, (0), 0 states 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 09:25:28,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:25:28,635 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 09:25:28,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:25:28,831 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:25:28,833 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:25:28,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:28,880 INFO L124 PetriNetUnfolderBase]: 101/661 cut-off events. [2023-08-04 09:25:28,880 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:25:28,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 101/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3250 event pairs, 0 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 386. Up to 16 conditions per place. [2023-08-04 09:25:28,882 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:28,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:28,885 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:25:28,885 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:28,886 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:28,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 09:25:28,928 INFO L124 PetriNetUnfolderBase]: 101/661 cut-off events. [2023-08-04 09:25:28,928 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:25:28,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 101/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3250 event pairs, 0 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 386. Up to 16 conditions per place. [2023-08-04 09:25:28,937 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 09:25:33,176 INFO L134 LiptonReduction]: Checked pairs total: 8684 [2023-08-04 09:25:33,176 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-04 09:25:33,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:25:33,178 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;@788db3e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:25:33,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:25:33,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:25:33,182 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-08-04 09:25:33,182 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:25:33,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:25:33,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:25:33,182 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 09:25:33,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:25:33,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1679283077, now seen corresponding path program 1 times [2023-08-04 09:25:33,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:25:33,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381746455] [2023-08-04 09:25:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:33,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:25:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:33,263 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 09:25:33,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:25:33,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381746455] [2023-08-04 09:25:33,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381746455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:25:33,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:25:33,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:25:33,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765078771] [2023-08-04 09:25:33,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:25:33,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:25:33,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:25:33,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:25:33,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:25:33,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 360 [2023-08-04 09:25:33,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:25:33,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:25:33,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 360 [2023-08-04 09:25:33,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:25:33,519 INFO L124 PetriNetUnfolderBase]: 2293/3238 cut-off events. [2023-08-04 09:25:33,519 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2023-08-04 09:25:33,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6540 conditions, 3238 events. 2293/3238 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15120 event pairs, 1048 based on Foata normal form. 0/1863 useless extension candidates. Maximal degree in co-relation 4989. Up to 3069 conditions per place. [2023-08-04 09:25:33,532 INFO L140 encePairwiseOnDemand]: 356/360 looper letters, 19 selfloop transitions, 2 changer transitions 22/49 dead transitions. [2023-08-04 09:25:33,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 220 flow [2023-08-04 09:25:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:25:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:25:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-04 09:25:33,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-08-04 09:25:33,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-04 09:25:33,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-04 09:25:33,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:25:33,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-04 09:25:33,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 09:25:33,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 09:25:33,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states 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 09:25:33,538 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 140 flow. Second operand 3 states and 516 transitions. [2023-08-04 09:25:33,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 220 flow [2023-08-04 09:25:33,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:25:33,540 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 79 flow [2023-08-04 09:25:33,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-08-04 09:25:33,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 09:25:33,542 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 79 flow [2023-08-04 09:25:33,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:25:33,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:25:33,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:25:33,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:25:33,543 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 09:25:33,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:25:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2022768642, now seen corresponding path program 1 times [2023-08-04 09:25:33,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:25:33,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368968973] [2023-08-04 09:25:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:33,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:25:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:25:33,592 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:25:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:25:33,625 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:25:33,625 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:25:33,626 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:25:33,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:25:33,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:25:33,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:25:33,626 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:25:33,627 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:25:33,627 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:25:33,627 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:25:33,657 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:25:33,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 09:25:34,080 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-04 09:25:34,080 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:25:34,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4824 conditions, 4150 events. 891/4150 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33086 event pairs, 11 based on Foata normal form. 0/3503 useless extension candidates. Maximal degree in co-relation 2464. Up to 192 conditions per place. [2023-08-04 09:25:34,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 09:25:34,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 235 transitions, 560 flow [2023-08-04 09:25:34,135 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:25:34,135 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-04 09:25:34,135 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-04 09:25:34,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 09:25:34,585 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-04 09:25:34,586 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:25:34,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4824 conditions, 4150 events. 891/4150 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33086 event pairs, 11 based on Foata normal form. 0/3503 useless extension candidates. Maximal degree in co-relation 2464. Up to 192 conditions per place. [2023-08-04 09:25:34,660 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 09:25:39,574 INFO L134 LiptonReduction]: Checked pairs total: 26967 [2023-08-04 09:25:39,575 INFO L136 LiptonReduction]: Total number of compositions: 187 [2023-08-04 09:25:39,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:25:39,579 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;@788db3e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:25:39,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:25:39,581 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:25:39,582 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 09:25:39,582 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:25:39,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:25:39,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:25:39,582 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:25:39,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:25:39,582 INFO L85 PathProgramCache]: Analyzing trace with hash -419356117, now seen corresponding path program 1 times [2023-08-04 09:25:39,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:25:39,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924663408] [2023-08-04 09:25:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:39,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:25:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:39,619 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 09:25:39,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:25:39,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924663408] [2023-08-04 09:25:39,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924663408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:25:39,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:25:39,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:25:39,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110311206] [2023-08-04 09:25:39,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:25:39,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:25:39,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:25:39,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:25:39,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:25:39,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-08-04 09:25:39,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states 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 09:25:39,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:25:39,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-08-04 09:25:39,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:26:00,450 INFO L124 PetriNetUnfolderBase]: 282571/337077 cut-off events. [2023-08-04 09:26:00,450 INFO L125 PetriNetUnfolderBase]: For 35164/35164 co-relation queries the response was YES. [2023-08-04 09:26:01,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685367 conditions, 337077 events. 282571/337077 cut-off events. For 35164/35164 co-relation queries the response was YES. Maximal size of possible extension queue 6401. Compared 1591548 event pairs, 121223 based on Foata normal form. 0/188813 useless extension candidates. Maximal degree in co-relation 224693. Up to 327405 conditions per place. [2023-08-04 09:26:02,594 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 59 selfloop transitions, 2 changer transitions 3/76 dead transitions. [2023-08-04 09:26:02,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 364 flow [2023-08-04 09:26:02,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:26:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:26:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-04 09:26:02,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834123222748815 [2023-08-04 09:26:02,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-04 09:26:02,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-04 09:26:02,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:26:02,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-04 09:26:02,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states 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 09:26:02,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:26:02,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:26:02,601 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 236 flow. Second operand 3 states and 612 transitions. [2023-08-04 09:26:02,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 364 flow [2023-08-04 09:26:02,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 364 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:26:02,635 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 228 flow [2023-08-04 09:26:02,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-08-04 09:26:02,636 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:26:02,636 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 228 flow [2023-08-04 09:26:02,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states 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 09:26:02,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:02,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:26:02,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:26:02,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:26:02,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:02,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2045781764, now seen corresponding path program 1 times [2023-08-04 09:26:02,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:02,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777817531] [2023-08-04 09:26:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:02,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:02,676 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 09:26:02,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:26:02,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777817531] [2023-08-04 09:26:02,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777817531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:26:02,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576580209] [2023-08-04 09:26:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:02,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:26:02,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:26:02,679 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 09:26:02,681 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 09:26:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:02,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:26:02,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:26:02,765 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 09:26:02,765 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:26:02,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576580209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:26:02,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:26:02,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:26:02,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59741295] [2023-08-04 09:26:02,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:26:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:26:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:26:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:26:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:26:02,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-08-04 09:26:02,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 09:26:02,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:26:02,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-08-04 09:26:02,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:26:22,794 INFO L124 PetriNetUnfolderBase]: 278801/332182 cut-off events. [2023-08-04 09:26:22,794 INFO L125 PetriNetUnfolderBase]: For 33249/33249 co-relation queries the response was YES. [2023-08-04 09:26:23,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675359 conditions, 332182 events. 278801/332182 cut-off events. For 33249/33249 co-relation queries the response was YES. Maximal size of possible extension queue 6490. Compared 1576666 event pairs, 119881 based on Foata normal form. 0/185954 useless extension candidates. Maximal degree in co-relation 384725. Up to 322814 conditions per place. [2023-08-04 09:26:24,615 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 64 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 09:26:24,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 376 flow [2023-08-04 09:26:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:26:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:26:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-08-04 09:26:24,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578199052132703 [2023-08-04 09:26:24,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-08-04 09:26:24,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-08-04 09:26:24,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:26:24,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-08-04 09:26:24,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states 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 09:26:24,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:26:24,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:26:24,621 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 228 flow. Second operand 3 states and 615 transitions. [2023-08-04 09:26:24,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 376 flow [2023-08-04 09:26:24,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 362 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:26:24,746 INFO L231 Difference]: Finished difference. Result has 59 places, 71 transitions, 226 flow [2023-08-04 09:26:24,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=59, PETRI_TRANSITIONS=71} [2023-08-04 09:26:24,748 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -2 predicate places. [2023-08-04 09:26:24,748 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 71 transitions, 226 flow [2023-08-04 09:26:24,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 09:26:24,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:24,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:26:24,757 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 09:26:24,954 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 09:26:24,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:26:24,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:24,955 INFO L85 PathProgramCache]: Analyzing trace with hash 254661881, now seen corresponding path program 1 times [2023-08-04 09:26:24,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:24,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360180035] [2023-08-04 09:26:24,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:24,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:24,996 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 09:26:24,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:26:24,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360180035] [2023-08-04 09:26:24,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360180035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:26:24,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147471520] [2023-08-04 09:26:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:24,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:26:24,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:26:24,998 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 09:26:25,012 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 09:26:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:25,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:26:25,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:26:25,098 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 09:26:25,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:26:25,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147471520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:26:25,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:26:25,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:26:25,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119813504] [2023-08-04 09:26:25,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:26:25,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:26:25,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:26:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:26:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:26:25,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-08-04 09:26:25,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 71 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:25,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:26:25,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-08-04 09:26:25,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:26:44,235 INFO L124 PetriNetUnfolderBase]: 278203/333666 cut-off events. [2023-08-04 09:26:44,236 INFO L125 PetriNetUnfolderBase]: For 16458/16458 co-relation queries the response was YES. [2023-08-04 09:26:44,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675995 conditions, 333666 events. 278203/333666 cut-off events. For 16458/16458 co-relation queries the response was YES. Maximal size of possible extension queue 7023. Compared 1662966 event pairs, 118847 based on Foata normal form. 0/187953 useless extension candidates. Maximal degree in co-relation 233318. Up to 318914 conditions per place. [2023-08-04 09:26:46,170 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 69 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-04 09:26:46,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 83 transitions, 392 flow [2023-08-04 09:26:46,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:26:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:26:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2023-08-04 09:26:46,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48894154818325436 [2023-08-04 09:26:46,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2023-08-04 09:26:46,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2023-08-04 09:26:46,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:26:46,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2023-08-04 09:26:46,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states 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 09:26:46,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:26:46,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:26:46,176 INFO L175 Difference]: Start difference. First operand has 59 places, 71 transitions, 226 flow. Second operand 3 states and 619 transitions. [2023-08-04 09:26:46,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 83 transitions, 392 flow [2023-08-04 09:26:46,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:26:46,186 INFO L231 Difference]: Finished difference. Result has 61 places, 72 transitions, 236 flow [2023-08-04 09:26:46,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=61, PETRI_TRANSITIONS=72} [2023-08-04 09:26:46,186 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2023-08-04 09:26:46,186 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 72 transitions, 236 flow [2023-08-04 09:26:46,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:26:46,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:26:46,187 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] [2023-08-04 09:26:46,192 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 09:26:46,392 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 09:26:46,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:26:46,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:26:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash 560652990, now seen corresponding path program 1 times [2023-08-04 09:26:46,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:26:46,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579988564] [2023-08-04 09:26:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:46,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:26:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:46,445 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 09:26:46,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:26:46,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579988564] [2023-08-04 09:26:46,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579988564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:26:46,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055823417] [2023-08-04 09:26:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:26:46,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:26:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:26:46,448 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 09:26:46,450 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 09:26:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:26:46,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:26:46,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:26:46,551 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 09:26:46,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:26:46,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055823417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:26:46,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:26:46,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:26:46,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712147598] [2023-08-04 09:26:46,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:26:46,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:26:46,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:26:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:26:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:26:46,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-08-04 09:26:46,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 72 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 09:26:46,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:26:46,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-08-04 09:26:46,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:04,141 INFO L124 PetriNetUnfolderBase]: 246598/297048 cut-off events. [2023-08-04 09:27:04,141 INFO L125 PetriNetUnfolderBase]: For 12805/12805 co-relation queries the response was YES. [2023-08-04 09:27:05,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606627 conditions, 297048 events. 246598/297048 cut-off events. For 12805/12805 co-relation queries the response was YES. Maximal size of possible extension queue 6223. Compared 1496763 event pairs, 95714 based on Foata normal form. 0/169878 useless extension candidates. Maximal degree in co-relation 225285. Up to 240767 conditions per place. [2023-08-04 09:27:06,636 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 78 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-04 09:27:06,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 451 flow [2023-08-04 09:27:06,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-04 09:27:06,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495260663507109 [2023-08-04 09:27:06,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-04 09:27:06,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-04 09:27:06,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:06,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-04 09:27:06,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states 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 09:27:06,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:27:06,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:27:06,646 INFO L175 Difference]: Start difference. First operand has 61 places, 72 transitions, 236 flow. Second operand 3 states and 627 transitions. [2023-08-04 09:27:06,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 451 flow [2023-08-04 09:27:06,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 449 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:27:06,672 INFO L231 Difference]: Finished difference. Result has 63 places, 73 transitions, 246 flow [2023-08-04 09:27:06,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=63, PETRI_TRANSITIONS=73} [2023-08-04 09:27:06,674 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:27:06,674 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 73 transitions, 246 flow [2023-08-04 09:27:06,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 09:27:06,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:06,676 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] [2023-08-04 09:27:06,684 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 09:27:06,880 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 09:27:06,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:06,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:06,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2020151096, now seen corresponding path program 1 times [2023-08-04 09:27:06,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:06,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159078375] [2023-08-04 09:27:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:06,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:06,969 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 09:27:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159078375] [2023-08-04 09:27:06,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159078375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:06,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003285242] [2023-08-04 09:27:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:06,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:06,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:06,985 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 09:27:07,025 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 09:27:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:07,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:27:07,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:07,134 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 09:27:07,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:27:07,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003285242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:07,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:27:07,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:27:07,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582357080] [2023-08-04 09:27:07,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:07,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:07,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:07,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:07,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-08-04 09:27:07,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:27:07,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:07,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-08-04 09:27:07,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:24,252 INFO L124 PetriNetUnfolderBase]: 229467/278319 cut-off events. [2023-08-04 09:27:24,252 INFO L125 PetriNetUnfolderBase]: For 25238/25238 co-relation queries the response was YES. [2023-08-04 09:27:24,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581615 conditions, 278319 events. 229467/278319 cut-off events. For 25238/25238 co-relation queries the response was YES. Maximal size of possible extension queue 5092. Compared 1414351 event pairs, 86967 based on Foata normal form. 0/164956 useless extension candidates. Maximal degree in co-relation 229378. Up to 211355 conditions per place. [2023-08-04 09:27:25,914 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 79 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-04 09:27:25,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 463 flow [2023-08-04 09:27:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-04 09:27:25,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495260663507109 [2023-08-04 09:27:25,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-04 09:27:25,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-04 09:27:25,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:25,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-04 09:27:25,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states 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 09:27:25,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:27:25,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:27:25,919 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 246 flow. Second operand 3 states and 627 transitions. [2023-08-04 09:27:25,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 463 flow [2023-08-04 09:27:26,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 461 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:27:26,340 INFO L231 Difference]: Finished difference. Result has 65 places, 74 transitions, 256 flow [2023-08-04 09:27:26,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=65, PETRI_TRANSITIONS=74} [2023-08-04 09:27:26,341 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-04 09:27:26,341 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 74 transitions, 256 flow [2023-08-04 09:27:26,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:27:26,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:26,342 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] [2023-08-04 09:27:26,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:27:26,542 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 09:27:26,542 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:26,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2136163547, now seen corresponding path program 1 times [2023-08-04 09:27:26,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:26,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300711312] [2023-08-04 09:27:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:26,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:26,585 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 09:27:26,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:26,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300711312] [2023-08-04 09:27:26,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300711312] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:26,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430237846] [2023-08-04 09:27:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:26,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:26,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:26,587 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 09:27:26,593 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 09:27:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:26,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:27:26,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:26,692 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 09:27:26,692 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:27:26,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430237846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:27:26,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:27:26,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:27:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174096929] [2023-08-04 09:27:26,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:27:26,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:27:26,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:26,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:27:26,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:26,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-08-04 09:27:26,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 74 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 09:27:26,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:26,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-08-04 09:27:26,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:27:43,565 INFO L124 PetriNetUnfolderBase]: 228401/277734 cut-off events. [2023-08-04 09:27:43,565 INFO L125 PetriNetUnfolderBase]: For 27638/27638 co-relation queries the response was YES. [2023-08-04 09:27:44,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587989 conditions, 277734 events. 228401/277734 cut-off events. For 27638/27638 co-relation queries the response was YES. Maximal size of possible extension queue 4992. Compared 1416603 event pairs, 100117 based on Foata normal form. 0/167999 useless extension candidates. Maximal degree in co-relation 315843. Up to 241882 conditions per place. [2023-08-04 09:27:45,078 INFO L140 encePairwiseOnDemand]: 419/422 looper letters, 80 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-04 09:27:45,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 475 flow [2023-08-04 09:27:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:27:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:27:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-08-04 09:27:45,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495260663507109 [2023-08-04 09:27:45,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-08-04 09:27:45,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-08-04 09:27:45,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:27:45,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-08-04 09:27:45,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states 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 09:27:45,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:27:45,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 09:27:45,084 INFO L175 Difference]: Start difference. First operand has 65 places, 74 transitions, 256 flow. Second operand 3 states and 627 transitions. [2023-08-04 09:27:45,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 475 flow [2023-08-04 09:27:51,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 94 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:27:51,083 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 266 flow [2023-08-04 09:27:51,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-04 09:27:51,084 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-04 09:27:51,084 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 266 flow [2023-08-04 09:27:51,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 09:27:51,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:27:51,085 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, 1] [2023-08-04 09:27:51,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:27:51,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 09:27:51,286 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:27:51,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:27:51,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1710776566, now seen corresponding path program 1 times [2023-08-04 09:27:51,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:27:51,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289831236] [2023-08-04 09:27:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:51,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:27:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:51,331 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 09:27:51,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:27:51,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289831236] [2023-08-04 09:27:51,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289831236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:27:51,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151836330] [2023-08-04 09:27:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:27:51,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:27:51,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:27:51,333 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:27:51,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:27:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:27:51,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:27:51,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:27:51,449 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 09:27:51,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:27:51,471 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 09:27:51,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151836330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:27:51,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:27:51,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:27:51,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685243951] [2023-08-04 09:27:51,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:27:51,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:27:51,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:27:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:27:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:27:51,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 422 [2023-08-04 09:27:51,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 0 states 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 09:27:51,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:27:51,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 422 [2023-08-04 09:27:51,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:07,189 INFO L124 PetriNetUnfolderBase]: 213305/259296 cut-off events. [2023-08-04 09:28:07,189 INFO L125 PetriNetUnfolderBase]: For 24173/24173 co-relation queries the response was YES. [2023-08-04 09:28:07,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551376 conditions, 259296 events. 213305/259296 cut-off events. For 24173/24173 co-relation queries the response was YES. Maximal size of possible extension queue 4970. Compared 1321863 event pairs, 77387 based on Foata normal form. 3/157638 useless extension candidates. Maximal degree in co-relation 466459. Up to 250738 conditions per place. [2023-08-04 09:28:08,843 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 67 selfloop transitions, 3 changer transitions 1/83 dead transitions. [2023-08-04 09:28:08,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 424 flow [2023-08-04 09:28:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:28:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:28:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 795 transitions. [2023-08-04 09:28:08,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4709715639810427 [2023-08-04 09:28:08,846 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 795 transitions. [2023-08-04 09:28:08,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 795 transitions. [2023-08-04 09:28:08,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:08,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 795 transitions. [2023-08-04 09:28:08,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states 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 09:28:08,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states 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 09:28:08,850 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states 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 09:28:08,850 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 266 flow. Second operand 4 states and 795 transitions. [2023-08-04 09:28:08,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 424 flow [2023-08-04 09:28:15,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:28:15,199 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 278 flow [2023-08-04 09:28:15,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=66, 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=278, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2023-08-04 09:28:15,199 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-04 09:28:15,199 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 278 flow [2023-08-04 09:28:15,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 0 states 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 09:28:15,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:15,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:15,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:28:15,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 09:28:15,401 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:15,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1137989145, now seen corresponding path program 1 times [2023-08-04 09:28:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:15,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139267258] [2023-08-04 09:28:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:15,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:28:15,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:15,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139267258] [2023-08-04 09:28:15,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139267258] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:15,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710402792] [2023-08-04 09:28:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:15,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:15,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:15,457 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:28:15,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:28:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:15,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:28:15,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:28:15,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:28:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:28:15,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710402792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:28:15,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:28:15,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:28:15,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798336523] [2023-08-04 09:28:15,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:28:15,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:28:15,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:28:15,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:15,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 422 [2023-08-04 09:28:15,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 0 states have call successors, (0), 0 states 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 09:28:15,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:15,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 422 [2023-08-04 09:28:15,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand