/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_bench-exp2x9.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:09:25,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:09:25,180 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:09:25,183 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:09:25,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:09:25,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:09:25,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:09:25,201 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:09:25,202 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:09:25,202 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:09:25,203 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:09:25,203 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:09:25,203 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:09:25,204 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:09:25,204 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:09:25,204 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:09:25,204 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:09:25,205 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:09:25,205 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:09:25,205 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:09:25,205 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:09:25,206 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:09:25,206 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:09:25,206 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:09:25,206 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:09:25,206 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:09:25,207 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:09:25,207 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:09:25,207 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:09:25,207 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:09:25,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:09:25,208 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:09:25,208 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:09:25,208 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:09:25,208 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:09:25,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:09:25,208 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:09:25,209 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:09:25,209 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:09:25,209 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:09:25,209 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:09:25,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:09:25,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:09:25,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:09:25,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:09:25,452 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:09:25,453 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:09:25,453 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_bench-exp2x9.wvr_bound2.c [2023-08-04 08:09:26,530 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:09:26,685 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:09:26,685 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_bench-exp2x9.wvr_bound2.c [2023-08-04 08:09:26,692 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dcaba7a5/801456578b184ccaaf23a356c0df2514/FLAG851de6b02 [2023-08-04 08:09:26,710 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dcaba7a5/801456578b184ccaaf23a356c0df2514 [2023-08-04 08:09:26,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:09:26,717 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:09:26,719 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:09:26,719 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:09:26,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:09:26,722 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,723 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb99908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26, skipping insertion in model container [2023-08-04 08:09:26,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,750 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:09:26,873 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_bench-exp2x9.wvr_bound2.c[2993,3006] [2023-08-04 08:09:26,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:09:26,880 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:09:26,898 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_bench-exp2x9.wvr_bound2.c[2993,3006] [2023-08-04 08:09:26,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:09:26,909 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:09:26,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26 WrapperNode [2023-08-04 08:09:26,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:09:26,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:09:26,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:09:26,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:09:26,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,919 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,940 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 160 [2023-08-04 08:09:26,940 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:09:26,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:09:26,941 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:09:26,941 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:09:26,946 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,949 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,949 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,953 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,956 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,957 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,958 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,959 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:09:26,960 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:09:26,960 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:09:26,960 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:09:26,961 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (1/1) ... [2023-08-04 08:09:26,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:09:26,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:09:27,003 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 08:09:27,005 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 08:09:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:09:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:09:27,024 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:09:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:09:27,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:09:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:09:27,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:09:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 08:09:27,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 08:09:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:09:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:09:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:09:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:09:27,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:09:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:09:27,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:09:27,026 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 08:09:27,096 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:09:27,097 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:09:27,346 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:09:27,352 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:09:27,352 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:09:27,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:09:27 BoogieIcfgContainer [2023-08-04 08:09:27,353 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:09:27,355 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:09:27,355 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:09:27,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:09:27,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:09:26" (1/3) ... [2023-08-04 08:09:27,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c41c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:09:27, skipping insertion in model container [2023-08-04 08:09:27,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:09:26" (2/3) ... [2023-08-04 08:09:27,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c41c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:09:27, skipping insertion in model container [2023-08-04 08:09:27,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:09:27" (3/3) ... [2023-08-04 08:09:27,358 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_bench-exp2x9.wvr_bound2.c [2023-08-04 08:09:27,374 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:09:27,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:09:27,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:09:27,381 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:09:27,462 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 08:09:27,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:27,762 INFO L124 PetriNetUnfolderBase]: 269/1527 cut-off events. [2023-08-04 08:09:27,763 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:09:27,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 1527 events. 269/1527 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10407 event pairs, 0 based on Foata normal form. 0/1276 useless extension candidates. Maximal degree in co-relation 826. Up to 33 conditions per place. [2023-08-04 08:09:27,782 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:27,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:27,801 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:09:27,813 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:27,819 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:27,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:27,991 INFO L124 PetriNetUnfolderBase]: 269/1527 cut-off events. [2023-08-04 08:09:27,991 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:09:28,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 1527 events. 269/1527 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10407 event pairs, 0 based on Foata normal form. 0/1276 useless extension candidates. Maximal degree in co-relation 826. Up to 33 conditions per place. [2023-08-04 08:09:28,036 INFO L119 LiptonReduction]: Number of co-enabled transitions 11424 [2023-08-04 08:09:31,587 INFO L134 LiptonReduction]: Checked pairs total: 48078 [2023-08-04 08:09:31,587 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-04 08:09:31,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:09:31,609 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;@6b725549, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:09:31,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:09:31,618 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:09:31,618 INFO L124 PetriNetUnfolderBase]: 0/71 cut-off events. [2023-08-04 08:09:31,618 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:09:31,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:31,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:09:31,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:31,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:31,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1558182911, now seen corresponding path program 1 times [2023-08-04 08:09:31,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:31,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677516276] [2023-08-04 08:09:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:31,837 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 08:09:31,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:31,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677516276] [2023-08-04 08:09:31,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677516276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:09:31,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:09:31,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:09:31,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109430689] [2023-08-04 08:09:31,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:09:31,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:09:31,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:31,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:09:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:09:31,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 364 [2023-08-04 08:09:31,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 86 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 08:09:31,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:31,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 364 [2023-08-04 08:09:31,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:09:33,095 INFO L124 PetriNetUnfolderBase]: 8212/13522 cut-off events. [2023-08-04 08:09:33,096 INFO L125 PetriNetUnfolderBase]: For 1060/1060 co-relation queries the response was YES. [2023-08-04 08:09:33,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26614 conditions, 13522 events. 8212/13522 cut-off events. For 1060/1060 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 93078 event pairs, 5190 based on Foata normal form. 0/8627 useless extension candidates. Maximal degree in co-relation 20962. Up to 11768 conditions per place. [2023-08-04 08:09:33,212 INFO L140 encePairwiseOnDemand]: 360/364 looper letters, 54 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-04 08:09:33,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 356 flow [2023-08-04 08:09:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:09:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:09:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2023-08-04 08:09:33,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366300366300366 [2023-08-04 08:09:33,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2023-08-04 08:09:33,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2023-08-04 08:09:33,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:09:33,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2023-08-04 08:09:33,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 08:09:33,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:33,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:33,237 INFO L175 Difference]: Start difference. First operand has 75 places, 86 transitions, 240 flow. Second operand 3 states and 586 transitions. [2023-08-04 08:09:33,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 356 flow [2023-08-04 08:09:33,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:09:33,246 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 246 flow [2023-08-04 08:09:33,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2023-08-04 08:09:33,249 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-04 08:09:33,249 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 246 flow [2023-08-04 08:09:33,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 08:09:33,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:33,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:09:33,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:09:33,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:33,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1930550119, now seen corresponding path program 1 times [2023-08-04 08:09:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:33,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783973237] [2023-08-04 08:09:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:33,372 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 08:09:33,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:33,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783973237] [2023-08-04 08:09:33,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783973237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:09:33,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358130202] [2023-08-04 08:09:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:33,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:09:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:09:33,387 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 08:09:33,397 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 08:09:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:33,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:09:33,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:09:33,460 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 08:09:33,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:09:33,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358130202] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:09:33,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:09:33,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:09:33,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362101223] [2023-08-04 08:09:33,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:09:33,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:09:33,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:33,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:09:33,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:09:33,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 364 [2023-08-04 08:09:33,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states 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 08:09:33,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:33,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 364 [2023-08-04 08:09:33,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:09:34,359 INFO L124 PetriNetUnfolderBase]: 7874/12716 cut-off events. [2023-08-04 08:09:34,359 INFO L125 PetriNetUnfolderBase]: For 1044/1044 co-relation queries the response was YES. [2023-08-04 08:09:34,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25308 conditions, 12716 events. 7874/12716 cut-off events. For 1044/1044 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 83714 event pairs, 5084 based on Foata normal form. 0/8020 useless extension candidates. Maximal degree in co-relation 19653. Up to 11299 conditions per place. [2023-08-04 08:09:34,442 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 56 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-04 08:09:34,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 90 transitions, 372 flow [2023-08-04 08:09:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:09:34,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:09:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-08-04 08:09:34,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375457875457875 [2023-08-04 08:09:34,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-08-04 08:09:34,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-08-04 08:09:34,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:09:34,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-08-04 08:09:34,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 08:09:34,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:34,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:34,455 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 246 flow. Second operand 3 states and 587 transitions. [2023-08-04 08:09:34,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 90 transitions, 372 flow [2023-08-04 08:09:34,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 90 transitions, 368 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:09:34,463 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 250 flow [2023-08-04 08:09:34,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2023-08-04 08:09:34,463 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2023-08-04 08:09:34,464 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 250 flow [2023-08-04 08:09:34,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states 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 08:09:34,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:34,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:09:34,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 08:09:34,668 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 08:09:34,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:34,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:34,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1098063260, now seen corresponding path program 1 times [2023-08-04 08:09:34,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:34,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332589068] [2023-08-04 08:09:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:34,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:34,742 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 08:09:34,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:34,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332589068] [2023-08-04 08:09:34,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332589068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:09:34,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919225216] [2023-08-04 08:09:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:34,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:09:34,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:09:34,744 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 08:09:34,746 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 08:09:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:34,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:09:34,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:09:34,822 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 08:09:34,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:09:34,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919225216] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:09:34,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:09:34,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:09:34,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7635429] [2023-08-04 08:09:34,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:09:34,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:09:34,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:34,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:09:34,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:09:34,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 364 [2023-08-04 08:09:34,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 08:09:34,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:34,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 364 [2023-08-04 08:09:34,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:09:35,492 INFO L124 PetriNetUnfolderBase]: 7624/12120 cut-off events. [2023-08-04 08:09:35,493 INFO L125 PetriNetUnfolderBase]: For 1049/1049 co-relation queries the response was YES. [2023-08-04 08:09:35,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24401 conditions, 12120 events. 7624/12120 cut-off events. For 1049/1049 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 75911 event pairs, 5002 based on Foata normal form. 0/7571 useless extension candidates. Maximal degree in co-relation 18750. Up to 10916 conditions per place. [2023-08-04 08:09:35,570 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 58 selfloop transitions, 2 changer transitions 1/92 dead transitions. [2023-08-04 08:09:35,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 92 transitions, 384 flow [2023-08-04 08:09:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:09:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:09:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-08-04 08:09:35,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393772893772893 [2023-08-04 08:09:35,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-08-04 08:09:35,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-08-04 08:09:35,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:09:35,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-08-04 08:09:35,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 08:09:35,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:35,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:35,575 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 250 flow. Second operand 3 states and 589 transitions. [2023-08-04 08:09:35,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 92 transitions, 384 flow [2023-08-04 08:09:35,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 92 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:09:35,578 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 250 flow [2023-08-04 08:09:35,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2023-08-04 08:09:35,579 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 4 predicate places. [2023-08-04 08:09:35,579 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 250 flow [2023-08-04 08:09:35,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 08:09:35,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:35,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:09:35,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 08:09:35,783 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 08:09:35,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:35,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1204070886, now seen corresponding path program 1 times [2023-08-04 08:09:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:35,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306699872] [2023-08-04 08:09:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:35,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:35,886 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 08:09:35,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:35,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306699872] [2023-08-04 08:09:35,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306699872] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:09:35,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420219811] [2023-08-04 08:09:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:35,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:09:35,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:09:35,888 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 08:09:35,890 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 08:09:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:35,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:09:35,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:09:35,948 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 08:09:35,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:09:35,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420219811] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:09:35,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:09:35,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:09:35,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569466199] [2023-08-04 08:09:35,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:09:35,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:09:35,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:09:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:09:35,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 364 [2023-08-04 08:09:35,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 08:09:35,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:35,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 364 [2023-08-04 08:09:35,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:09:36,633 INFO L124 PetriNetUnfolderBase]: 7615/12182 cut-off events. [2023-08-04 08:09:36,633 INFO L125 PetriNetUnfolderBase]: For 1105/1105 co-relation queries the response was YES. [2023-08-04 08:09:36,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24496 conditions, 12182 events. 7615/12182 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 75017 event pairs, 4955 based on Foata normal form. 0/7687 useless extension candidates. Maximal degree in co-relation 18846. Up to 10589 conditions per place. [2023-08-04 08:09:36,704 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 60 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-04 08:09:36,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 93 transitions, 392 flow [2023-08-04 08:09:36,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:09:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:09:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-08-04 08:09:36,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412087912087912 [2023-08-04 08:09:36,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-08-04 08:09:36,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-08-04 08:09:36,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:09:36,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-08-04 08:09:36,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 08:09:36,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:36,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:36,715 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 250 flow. Second operand 3 states and 591 transitions. [2023-08-04 08:09:36,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 93 transitions, 392 flow [2023-08-04 08:09:36,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 383 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:09:36,720 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 249 flow [2023-08-04 08:09:36,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2023-08-04 08:09:36,722 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2023-08-04 08:09:36,722 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 249 flow [2023-08-04 08:09:36,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 08:09:36,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:36,723 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] [2023-08-04 08:09:36,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 08:09:36,926 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 08:09:36,929 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:36,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1661578221, now seen corresponding path program 1 times [2023-08-04 08:09:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:36,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416538686] [2023-08-04 08:09:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:36,988 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 08:09:36,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:36,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416538686] [2023-08-04 08:09:36,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416538686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:09:36,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136819343] [2023-08-04 08:09:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:36,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:09:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:09:36,992 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 08:09:36,994 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 08:09:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:37,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:09:37,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:09:37,066 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 08:09:37,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:09:37,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136819343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:09:37,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:09:37,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:09:37,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624922133] [2023-08-04 08:09:37,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:09:37,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:09:37,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:09:37,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:09:37,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 364 [2023-08-04 08:09:37,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states 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 08:09:37,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:37,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 364 [2023-08-04 08:09:37,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:09:37,549 INFO L124 PetriNetUnfolderBase]: 5185/8753 cut-off events. [2023-08-04 08:09:37,549 INFO L125 PetriNetUnfolderBase]: For 774/774 co-relation queries the response was YES. [2023-08-04 08:09:37,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17548 conditions, 8753 events. 5185/8753 cut-off events. For 774/774 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 53930 event pairs, 3906 based on Foata normal form. 0/5743 useless extension candidates. Maximal degree in co-relation 8244. Up to 6701 conditions per place. [2023-08-04 08:09:37,591 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 65 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-04 08:09:37,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 98 transitions, 422 flow [2023-08-04 08:09:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:09:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:09:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-08-04 08:09:37,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457875457875457 [2023-08-04 08:09:37,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-08-04 08:09:37,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-08-04 08:09:37,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:09:37,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-08-04 08:09:37,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 08:09:37,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:37,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:37,596 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 249 flow. Second operand 3 states and 596 transitions. [2023-08-04 08:09:37,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 98 transitions, 422 flow [2023-08-04 08:09:37,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 98 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:09:37,599 INFO L231 Difference]: Finished difference. Result has 79 places, 85 transitions, 257 flow [2023-08-04 08:09:37,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=257, PETRI_PLACES=79, PETRI_TRANSITIONS=85} [2023-08-04 08:09:37,599 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 4 predicate places. [2023-08-04 08:09:37,600 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 85 transitions, 257 flow [2023-08-04 08:09:37,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states 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 08:09:37,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:37,600 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 08:09:37,604 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 08:09:37,804 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 08:09:37,804 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:37,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash -348168637, now seen corresponding path program 1 times [2023-08-04 08:09:37,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:37,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868351139] [2023-08-04 08:09:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:37,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:37,871 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 08:09:37,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:37,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868351139] [2023-08-04 08:09:37,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868351139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:09:37,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671678224] [2023-08-04 08:09:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:37,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:09:37,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:09:37,872 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 08:09:37,875 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 08:09:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:37,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:09:37,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:09:37,938 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 08:09:37,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:09:37,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671678224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:09:37,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:09:37,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:09:37,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7383265] [2023-08-04 08:09:37,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:09:37,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:09:37,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:09:37,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:09:37,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 364 [2023-08-04 08:09:37,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 85 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 08:09:37,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:37,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 364 [2023-08-04 08:09:37,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:09:38,379 INFO L124 PetriNetUnfolderBase]: 3886/6858 cut-off events. [2023-08-04 08:09:38,380 INFO L125 PetriNetUnfolderBase]: For 997/997 co-relation queries the response was YES. [2023-08-04 08:09:38,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14109 conditions, 6858 events. 3886/6858 cut-off events. For 997/997 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 42235 event pairs, 2893 based on Foata normal form. 0/4875 useless extension candidates. Maximal degree in co-relation 6668. Up to 4649 conditions per place. [2023-08-04 08:09:38,416 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 66 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-04 08:09:38,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 432 flow [2023-08-04 08:09:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:09:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:09:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-08-04 08:09:38,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457875457875457 [2023-08-04 08:09:38,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-08-04 08:09:38,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-08-04 08:09:38,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:09:38,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-08-04 08:09:38,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 08:09:38,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:38,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:38,421 INFO L175 Difference]: Start difference. First operand has 79 places, 85 transitions, 257 flow. Second operand 3 states and 596 transitions. [2023-08-04 08:09:38,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 432 flow [2023-08-04 08:09:38,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 99 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:09:38,425 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 267 flow [2023-08-04 08:09:38,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2023-08-04 08:09:38,425 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 6 predicate places. [2023-08-04 08:09:38,425 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 267 flow [2023-08-04 08:09:38,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 08:09:38,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:38,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:09:38,432 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 08:09:38,631 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 08:09:38,632 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:38,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash -67151841, now seen corresponding path program 1 times [2023-08-04 08:09:38,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:38,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350165133] [2023-08-04 08:09:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:38,683 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 08:09:38,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:38,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350165133] [2023-08-04 08:09:38,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350165133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:09:38,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933017438] [2023-08-04 08:09:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:38,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:09:38,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:09:38,689 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 08:09:38,690 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 08:09:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:38,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:09:38,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:09:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:09:38,761 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:09:38,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933017438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:09:38,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:09:38,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:09:38,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230252540] [2023-08-04 08:09:38,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:09:38,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:09:38,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:38,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:09:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:09:38,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 364 [2023-08-04 08:09:38,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 267 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 08:09:38,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:38,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 364 [2023-08-04 08:09:38,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:09:39,108 INFO L124 PetriNetUnfolderBase]: 3633/6447 cut-off events. [2023-08-04 08:09:39,108 INFO L125 PetriNetUnfolderBase]: For 1039/1039 co-relation queries the response was YES. [2023-08-04 08:09:39,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13548 conditions, 6447 events. 3633/6447 cut-off events. For 1039/1039 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 39532 event pairs, 3202 based on Foata normal form. 0/4743 useless extension candidates. Maximal degree in co-relation 8676. Up to 5077 conditions per place. [2023-08-04 08:09:39,148 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 67 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-04 08:09:39,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 100 transitions, 444 flow [2023-08-04 08:09:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:09:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:09:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-08-04 08:09:39,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457875457875457 [2023-08-04 08:09:39,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-08-04 08:09:39,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-08-04 08:09:39,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:09:39,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-08-04 08:09:39,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 08:09:39,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:39,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:39,155 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 267 flow. Second operand 3 states and 596 transitions. [2023-08-04 08:09:39,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 100 transitions, 444 flow [2023-08-04 08:09:39,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 100 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:09:39,179 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 277 flow [2023-08-04 08:09:39,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2023-08-04 08:09:39,180 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2023-08-04 08:09:39,180 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 277 flow [2023-08-04 08:09:39,181 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 08:09:39,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:39,181 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] [2023-08-04 08:09:39,212 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 08:09:39,385 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 08:09:39,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:39,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1599255039, now seen corresponding path program 1 times [2023-08-04 08:09:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:39,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130074459] [2023-08-04 08:09:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:09:39,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:39,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130074459] [2023-08-04 08:09:39,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130074459] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:09:39,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182793735] [2023-08-04 08:09:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:39,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:09:39,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:09:39,430 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 08:09:39,432 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 08:09:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:39,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:09:39,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:09:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:09:39,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:09:39,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182793735] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:09:39,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:09:39,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:09:39,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487289959] [2023-08-04 08:09:39,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:09:39,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:09:39,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:39,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:09:39,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:09:39,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 364 [2023-08-04 08:09:39,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 277 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 08:09:39,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:39,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 364 [2023-08-04 08:09:39,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:09:39,917 INFO L124 PetriNetUnfolderBase]: 3624/6428 cut-off events. [2023-08-04 08:09:39,917 INFO L125 PetriNetUnfolderBase]: For 945/945 co-relation queries the response was YES. [2023-08-04 08:09:39,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13551 conditions, 6428 events. 3624/6428 cut-off events. For 945/945 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 39367 event pairs, 3347 based on Foata normal form. 0/4753 useless extension candidates. Maximal degree in co-relation 12424. Up to 5354 conditions per place. [2023-08-04 08:09:39,955 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 61 selfloop transitions, 2 changer transitions 2/96 dead transitions. [2023-08-04 08:09:39,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 96 transitions, 425 flow [2023-08-04 08:09:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:09:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:09:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-08-04 08:09:39,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412087912087912 [2023-08-04 08:09:39,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-08-04 08:09:39,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-08-04 08:09:39,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:09:39,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-08-04 08:09:39,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states 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 08:09:39,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:39,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 08:09:39,959 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 277 flow. Second operand 3 states and 591 transitions. [2023-08-04 08:09:39,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 96 transitions, 425 flow [2023-08-04 08:09:39,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 96 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:09:39,974 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 279 flow [2023-08-04 08:09:39,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-08-04 08:09:39,975 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 10 predicate places. [2023-08-04 08:09:39,975 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 279 flow [2023-08-04 08:09:39,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 08:09:39,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:39,976 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, 1, 1, 1] [2023-08-04 08:09:39,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 08:09:40,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:09:40,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:40,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1507276486, now seen corresponding path program 1 times [2023-08-04 08:09:40,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:40,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715499795] [2023-08-04 08:09:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:40,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:09:40,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:40,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715499795] [2023-08-04 08:09:40,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715499795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:09:40,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297133069] [2023-08-04 08:09:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:40,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:09:40,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:09:40,254 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 08:09:40,256 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 08:09:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:40,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:09:40,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:09:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:09:40,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:09:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:09:40,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297133069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:09:40,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:09:40,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:09:40,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934178535] [2023-08-04 08:09:40,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:09:40,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:09:40,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:40,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:09:40,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:09:40,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 364 [2023-08-04 08:09:40,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 279 flow. Second operand has 5 states, 5 states have (on average 183.2) internal successors, (916), 5 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 08:09:40,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:40,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 364 [2023-08-04 08:09:40,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:09:40,390 INFO L124 PetriNetUnfolderBase]: 5/21 cut-off events. [2023-08-04 08:09:40,390 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:09:40,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 21 events. 5/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 33 event pairs, 0 based on Foata normal form. 3/21 useless extension candidates. Maximal degree in co-relation 40. Up to 10 conditions per place. [2023-08-04 08:09:40,390 INFO L140 encePairwiseOnDemand]: 361/364 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-04 08:09:40,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 15 transitions, 52 flow [2023-08-04 08:09:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:09:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:09:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 710 transitions. [2023-08-04 08:09:40,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876373626373626 [2023-08-04 08:09:40,391 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 710 transitions. [2023-08-04 08:09:40,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 710 transitions. [2023-08-04 08:09:40,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:09:40,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 710 transitions. [2023-08-04 08:09:40,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 08:09:40,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 364.0) internal successors, (1820), 5 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states 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 08:09:40,394 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 364.0) internal successors, (1820), 5 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states 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 08:09:40,394 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 279 flow. Second operand 4 states and 710 transitions. [2023-08-04 08:09:40,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 15 transitions, 52 flow [2023-08-04 08:09:40,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 15 transitions, 50 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:09:40,395 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-08-04 08:09:40,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-08-04 08:09:40,395 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -48 predicate places. [2023-08-04 08:09:40,395 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-08-04 08:09:40,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 183.2) internal successors, (916), 5 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 08:09:40,397 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:09:40,422 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 08:09:40,604 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,SelfDestructingSolverStorable8 [2023-08-04 08:09:40,605 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:09:40,606 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:09:40,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:40,685 INFO L124 PetriNetUnfolderBase]: 269/1527 cut-off events. [2023-08-04 08:09:40,685 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:09:40,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 1527 events. 269/1527 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10407 event pairs, 0 based on Foata normal form. 0/1276 useless extension candidates. Maximal degree in co-relation 826. Up to 33 conditions per place. [2023-08-04 08:09:40,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:40,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:40,694 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:09:40,694 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:40,694 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:40,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 215 transitions, 498 flow [2023-08-04 08:09:40,760 INFO L124 PetriNetUnfolderBase]: 269/1527 cut-off events. [2023-08-04 08:09:40,761 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:09:40,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 1527 events. 269/1527 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10407 event pairs, 0 based on Foata normal form. 0/1276 useless extension candidates. Maximal degree in co-relation 826. Up to 33 conditions per place. [2023-08-04 08:09:40,779 INFO L119 LiptonReduction]: Number of co-enabled transitions 11424 [2023-08-04 08:09:43,600 INFO L134 LiptonReduction]: Checked pairs total: 47958 [2023-08-04 08:09:43,601 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-04 08:09:43,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:09:43,602 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;@6b725549, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:09:43,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 08:09:43,604 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:09:43,604 INFO L124 PetriNetUnfolderBase]: 0/33 cut-off events. [2023-08-04 08:09:43,604 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:09:43,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:43,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:09:43,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 08:09:43,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1101965164, now seen corresponding path program 1 times [2023-08-04 08:09:43,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:43,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84372407] [2023-08-04 08:09:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:43,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:09:43,630 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:09:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:09:43,661 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:09:43,661 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:09:43,661 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 08:09:43,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 08:09:43,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 08:09:43,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 08:09:43,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:09:43,662 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:09:43,662 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:09:43,662 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:09:43,662 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:09:43,690 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 08:09:43,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 283 transitions, 710 flow [2023-08-04 08:09:45,417 INFO L124 PetriNetUnfolderBase]: 5482/20520 cut-off events. [2023-08-04 08:09:45,417 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 08:09:45,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24905 conditions, 20520 events. 5482/20520 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 216978 event pairs, 162 based on Foata normal form. 0/17559 useless extension candidates. Maximal degree in co-relation 12379. Up to 1024 conditions per place. [2023-08-04 08:09:45,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 283 transitions, 710 flow [2023-08-04 08:09:45,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 283 transitions, 710 flow [2023-08-04 08:09:45,785 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:09:45,785 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 283 transitions, 710 flow [2023-08-04 08:09:45,785 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 283 transitions, 710 flow [2023-08-04 08:09:45,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 283 transitions, 710 flow [2023-08-04 08:09:47,707 INFO L124 PetriNetUnfolderBase]: 5482/20520 cut-off events. [2023-08-04 08:09:47,707 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 08:09:47,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24905 conditions, 20520 events. 5482/20520 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 216978 event pairs, 162 based on Foata normal form. 0/17559 useless extension candidates. Maximal degree in co-relation 12379. Up to 1024 conditions per place. [2023-08-04 08:09:48,383 INFO L119 LiptonReduction]: Number of co-enabled transitions 30912 [2023-08-04 08:09:51,282 INFO L134 LiptonReduction]: Checked pairs total: 201628 [2023-08-04 08:09:51,282 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-04 08:09:51,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:09:51,283 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;@6b725549, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:09:51,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:09:51,287 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:09:51,287 INFO L124 PetriNetUnfolderBase]: 0/64 cut-off events. [2023-08-04 08:09:51,287 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 08:09:51,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:09:51,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:09:51,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:09:51,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:09:51,287 INFO L85 PathProgramCache]: Analyzing trace with hash 467191390, now seen corresponding path program 1 times [2023-08-04 08:09:51,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:09:51,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745143042] [2023-08-04 08:09:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:09:51,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:09:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:09:51,308 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 08:09:51,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:09:51,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745143042] [2023-08-04 08:09:51,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745143042] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:09:51,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:09:51,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:09:51,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821279538] [2023-08-04 08:09:51,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:09:51,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:09:51,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:09:51,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:09:51,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:09:51,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 438 [2023-08-04 08:09:51,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 150 transitions, 444 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 08:09:51,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:09:51,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 438 [2023-08-04 08:09:51,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:10:24,729 INFO L124 PetriNetUnfolderBase]: 308492/430513 cut-off events. [2023-08-04 08:10:24,729 INFO L125 PetriNetUnfolderBase]: For 102148/102148 co-relation queries the response was YES. [2023-08-04 08:10:28,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903353 conditions, 430513 events. 308492/430513 cut-off events. For 102148/102148 co-relation queries the response was YES. Maximal size of possible extension queue 6725. Compared 3176960 event pairs, 212879 based on Foata normal form. 0/401178 useless extension candidates. Maximal degree in co-relation 373455. Up to 398775 conditions per place. [2023-08-04 08:10:31,191 INFO L140 encePairwiseOnDemand]: 434/438 looper letters, 74 selfloop transitions, 2 changer transitions 0/152 dead transitions. [2023-08-04 08:10:31,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 152 transitions, 600 flow [2023-08-04 08:10:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:10:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:10:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 738 transitions. [2023-08-04 08:10:31,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2023-08-04 08:10:31,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 738 transitions. [2023-08-04 08:10:31,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 738 transitions. [2023-08-04 08:10:31,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:10:31,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 738 transitions. [2023-08-04 08:10:31,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:10:31,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:10:31,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:10:31,196 INFO L175 Difference]: Start difference. First operand has 127 places, 150 transitions, 444 flow. Second operand 3 states and 738 transitions. [2023-08-04 08:10:31,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 152 transitions, 600 flow [2023-08-04 08:10:31,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 152 transitions, 600 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:10:31,263 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 454 flow [2023-08-04 08:10:31,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=454, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2023-08-04 08:10:31,264 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, 2 predicate places. [2023-08-04 08:10:31,264 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 454 flow [2023-08-04 08:10:31,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 08:10:31,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:10:31,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:10:31,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 08:10:31,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:10:31,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:10:31,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1763789325, now seen corresponding path program 1 times [2023-08-04 08:10:31,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:10:31,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540898263] [2023-08-04 08:10:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:10:31,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:10:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:10:31,287 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 08:10:31,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:10:31,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540898263] [2023-08-04 08:10:31,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540898263] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:10:31,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350052774] [2023-08-04 08:10:31,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:10:31,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:10:31,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:10:31,288 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 08:10:31,290 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 08:10:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:10:31,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:10:31,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:10:31,357 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 08:10:31,357 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:10:31,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350052774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:10:31,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:10:31,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:10:31,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306116822] [2023-08-04 08:10:31,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:10:31,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:10:31,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:10:31,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:10:31,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:10:31,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 438 [2023-08-04 08:10:31,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 454 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 08:10:31,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:10:31,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 438 [2023-08-04 08:10:31,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:11:07,446 INFO L124 PetriNetUnfolderBase]: 306180/425237 cut-off events. [2023-08-04 08:11:07,446 INFO L125 PetriNetUnfolderBase]: For 104343/104343 co-relation queries the response was YES. [2023-08-04 08:11:11,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 894336 conditions, 425237 events. 306180/425237 cut-off events. For 104343/104343 co-relation queries the response was YES. Maximal size of possible extension queue 6974. Compared 3105499 event pairs, 211818 based on Foata normal form. 0/396028 useless extension candidates. Maximal degree in co-relation 894304. Up to 395505 conditions per place. [2023-08-04 08:11:14,198 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 77 selfloop transitions, 2 changer transitions 0/155 dead transitions. [2023-08-04 08:11:14,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 155 transitions, 622 flow [2023-08-04 08:11:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:11:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:11:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2023-08-04 08:11:14,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5624048706240488 [2023-08-04 08:11:14,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2023-08-04 08:11:14,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2023-08-04 08:11:14,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:11:14,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2023-08-04 08:11:14,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states 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 08:11:14,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:11:14,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:11:14,205 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 454 flow. Second operand 3 states and 739 transitions. [2023-08-04 08:11:14,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 155 transitions, 622 flow [2023-08-04 08:11:14,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 155 transitions, 620 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:11:14,266 INFO L231 Difference]: Finished difference. Result has 131 places, 151 transitions, 464 flow [2023-08-04 08:11:14,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=464, PETRI_PLACES=131, PETRI_TRANSITIONS=151} [2023-08-04 08:11:14,266 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, 4 predicate places. [2023-08-04 08:11:14,266 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 151 transitions, 464 flow [2023-08-04 08:11:14,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 08:11:14,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:11:14,267 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 08:11:14,273 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 08:11:14,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:11:14,471 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:11:14,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:11:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash -911696807, now seen corresponding path program 1 times [2023-08-04 08:11:14,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:11:14,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122473818] [2023-08-04 08:11:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:11:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:11:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:11:14,510 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 08:11:14,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:11:14,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122473818] [2023-08-04 08:11:14,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122473818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:11:14,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177846212] [2023-08-04 08:11:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:11:14,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:11:14,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:11:14,511 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 08:11:14,515 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 08:11:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:11:14,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:11:14,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:11:14,582 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 08:11:14,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:11:14,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177846212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:11:14,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:11:14,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:11:14,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390932306] [2023-08-04 08:11:14,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:11:14,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:11:14,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:11:14,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:11:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:11:14,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 438 [2023-08-04 08:11:14,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 151 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states 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 08:11:14,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:11:14,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 438 [2023-08-04 08:11:14,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:11:51,149 INFO L124 PetriNetUnfolderBase]: 304272/421571 cut-off events. [2023-08-04 08:11:51,149 INFO L125 PetriNetUnfolderBase]: For 101861/101861 co-relation queries the response was YES. [2023-08-04 08:11:55,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887723 conditions, 421571 events. 304272/421571 cut-off events. For 101861/101861 co-relation queries the response was YES. Maximal size of possible extension queue 7363. Compared 3057098 event pairs, 210923 based on Foata normal form. 0/392572 useless extension candidates. Maximal degree in co-relation 393842. Up to 392561 conditions per place. [2023-08-04 08:11:57,686 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 80 selfloop transitions, 2 changer transitions 0/158 dead transitions. [2023-08-04 08:11:57,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 158 transitions, 642 flow [2023-08-04 08:11:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:11:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:11:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 741 transitions. [2023-08-04 08:11:57,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5639269406392694 [2023-08-04 08:11:57,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 741 transitions. [2023-08-04 08:11:57,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 741 transitions. [2023-08-04 08:11:57,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:11:57,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 741 transitions. [2023-08-04 08:11:57,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states 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 08:11:57,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:11:57,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:11:57,692 INFO L175 Difference]: Start difference. First operand has 131 places, 151 transitions, 464 flow. Second operand 3 states and 741 transitions. [2023-08-04 08:11:57,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 158 transitions, 642 flow [2023-08-04 08:11:57,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 158 transitions, 640 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:11:57,749 INFO L231 Difference]: Finished difference. Result has 133 places, 152 transitions, 474 flow [2023-08-04 08:11:57,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=474, PETRI_PLACES=133, PETRI_TRANSITIONS=152} [2023-08-04 08:11:57,750 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, 6 predicate places. [2023-08-04 08:11:57,750 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 152 transitions, 474 flow [2023-08-04 08:11:57,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states 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 08:11:57,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:11:57,750 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] [2023-08-04 08:11:57,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 08:11:57,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:11:57,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:11:57,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:11:57,952 INFO L85 PathProgramCache]: Analyzing trace with hash 503464125, now seen corresponding path program 1 times [2023-08-04 08:11:57,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:11:57,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521416614] [2023-08-04 08:11:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:11:57,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:11:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:11:57,982 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 08:11:57,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:11:57,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521416614] [2023-08-04 08:11:57,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521416614] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:11:57,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401676764] [2023-08-04 08:11:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:11:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:11:57,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:11:57,985 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 08:11:57,987 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 08:11:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:11:58,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:11:58,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:11:58,057 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 08:11:58,057 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:11:58,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401676764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:11:58,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:11:58,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:11:58,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721693273] [2023-08-04 08:11:58,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:11:58,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:11:58,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:11:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:11:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:11:58,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 438 [2023-08-04 08:11:58,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 152 transitions, 474 flow. Second operand has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 08:11:58,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:11:58,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 438 [2023-08-04 08:11:58,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:12:35,357 INFO L124 PetriNetUnfolderBase]: 304056/425459 cut-off events. [2023-08-04 08:12:35,357 INFO L125 PetriNetUnfolderBase]: For 74213/74213 co-relation queries the response was YES. [2023-08-04 08:12:39,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891924 conditions, 425459 events. 304056/425459 cut-off events. For 74213/74213 co-relation queries the response was YES. Maximal size of possible extension queue 7867. Compared 3148990 event pairs, 210236 based on Foata normal form. 0/397918 useless extension candidates. Maximal degree in co-relation 394978. Up to 389705 conditions per place. [2023-08-04 08:12:42,021 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 83 selfloop transitions, 2 changer transitions 0/161 dead transitions. [2023-08-04 08:12:42,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 161 transitions, 662 flow [2023-08-04 08:12:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:12:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:12:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 743 transitions. [2023-08-04 08:12:42,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654490106544902 [2023-08-04 08:12:42,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 743 transitions. [2023-08-04 08:12:42,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 743 transitions. [2023-08-04 08:12:42,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:12:42,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 743 transitions. [2023-08-04 08:12:42,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 08:12:42,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:12:42,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:12:42,026 INFO L175 Difference]: Start difference. First operand has 133 places, 152 transitions, 474 flow. Second operand 3 states and 743 transitions. [2023-08-04 08:12:42,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 161 transitions, 662 flow [2023-08-04 08:12:42,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 161 transitions, 660 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:12:42,127 INFO L231 Difference]: Finished difference. Result has 135 places, 153 transitions, 484 flow [2023-08-04 08:12:42,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=484, PETRI_PLACES=135, PETRI_TRANSITIONS=153} [2023-08-04 08:12:42,128 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, 8 predicate places. [2023-08-04 08:12:42,128 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 153 transitions, 484 flow [2023-08-04 08:12:42,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 08:12:42,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:12:42,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:12:42,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 08:12:42,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:12:42,332 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:12:42,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:12:42,332 INFO L85 PathProgramCache]: Analyzing trace with hash -645350371, now seen corresponding path program 1 times [2023-08-04 08:12:42,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:12:42,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535165318] [2023-08-04 08:12:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:42,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:12:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:42,365 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 08:12:42,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:12:42,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535165318] [2023-08-04 08:12:42,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535165318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:12:42,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220132013] [2023-08-04 08:12:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:42,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:12:42,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:12:42,366 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 08:12:42,369 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 08:12:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:42,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:12:42,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:12:42,451 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 08:12:42,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:12:42,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220132013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:12:42,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:12:42,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:12:42,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452363306] [2023-08-04 08:12:42,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:12:42,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:12:42,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:12:42,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:12:42,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:12:42,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 438 [2023-08-04 08:12:42,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 153 transitions, 484 flow. Second operand has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 08:12:42,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:12:42,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 438 [2023-08-04 08:12:42,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:13:18,408 INFO L124 PetriNetUnfolderBase]: 298968/419731 cut-off events. [2023-08-04 08:13:18,409 INFO L125 PetriNetUnfolderBase]: For 74869/74869 co-relation queries the response was YES. [2023-08-04 08:13:22,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884325 conditions, 419731 events. 298968/419731 cut-off events. For 74869/74869 co-relation queries the response was YES. Maximal size of possible extension queue 8256. Compared 3135878 event pairs, 215818 based on Foata normal form. 0/394510 useless extension candidates. Maximal degree in co-relation 420634. Up to 361273 conditions per place. [2023-08-04 08:13:24,829 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 93 selfloop transitions, 2 changer transitions 0/171 dead transitions. [2023-08-04 08:13:24,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 171 transitions, 734 flow [2023-08-04 08:13:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:13:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:13:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-04 08:13:24,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722983257229832 [2023-08-04 08:13:24,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-04 08:13:24,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-04 08:13:24,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:13:24,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-04 08:13:24,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:13:24,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:13:24,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:13:24,834 INFO L175 Difference]: Start difference. First operand has 135 places, 153 transitions, 484 flow. Second operand 3 states and 752 transitions. [2023-08-04 08:13:24,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 171 transitions, 734 flow [2023-08-04 08:13:24,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 171 transitions, 732 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:13:24,934 INFO L231 Difference]: Finished difference. Result has 137 places, 154 transitions, 494 flow [2023-08-04 08:13:24,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=494, PETRI_PLACES=137, PETRI_TRANSITIONS=154} [2023-08-04 08:13:24,935 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, 10 predicate places. [2023-08-04 08:13:24,935 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 154 transitions, 494 flow [2023-08-04 08:13:24,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 08:13:24,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:13:24,935 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] [2023-08-04 08:13:24,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 08:13:25,139 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,SelfDestructingSolverStorable14 [2023-08-04 08:13:25,140 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:13:25,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:13:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1905113860, now seen corresponding path program 1 times [2023-08-04 08:13:25,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:13:25,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120018314] [2023-08-04 08:13:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:25,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:13:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:25,173 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 08:13:25,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:13:25,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120018314] [2023-08-04 08:13:25,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120018314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:13:25,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208716038] [2023-08-04 08:13:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:25,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:13:25,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:13:25,174 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 08:13:25,176 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 08:13:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:25,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:13:25,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:13:25,252 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 08:13:25,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:13:25,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208716038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:13:25,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:13:25,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:13:25,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698183130] [2023-08-04 08:13:25,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:13:25,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:13:25,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:13:25,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:13:25,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:13:25,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 438 [2023-08-04 08:13:25,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 08:13:25,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:13:25,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 438 [2023-08-04 08:13:25,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:14:03,166 INFO L124 PetriNetUnfolderBase]: 304023/430038 cut-off events. [2023-08-04 08:14:03,166 INFO L125 PetriNetUnfolderBase]: For 95550/95550 co-relation queries the response was YES. [2023-08-04 08:14:07,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 930469 conditions, 430038 events. 304023/430038 cut-off events. For 95550/95550 co-relation queries the response was YES. Maximal size of possible extension queue 7791. Compared 3251778 event pairs, 199163 based on Foata normal form. 0/414194 useless extension candidates. Maximal degree in co-relation 480930. Up to 322953 conditions per place. [2023-08-04 08:14:09,849 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 94 selfloop transitions, 2 changer transitions 0/172 dead transitions. [2023-08-04 08:14:09,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 172 transitions, 746 flow [2023-08-04 08:14:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:14:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:14:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-04 08:14:09,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722983257229832 [2023-08-04 08:14:09,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-04 08:14:09,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-04 08:14:09,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:14:09,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-04 08:14:09,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:14:09,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:14:09,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:14:09,854 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 494 flow. Second operand 3 states and 752 transitions. [2023-08-04 08:14:09,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 172 transitions, 746 flow [2023-08-04 08:14:10,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 172 transitions, 744 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:14:10,185 INFO L231 Difference]: Finished difference. Result has 139 places, 155 transitions, 504 flow [2023-08-04 08:14:10,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=504, PETRI_PLACES=139, PETRI_TRANSITIONS=155} [2023-08-04 08:14:10,185 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, 12 predicate places. [2023-08-04 08:14:10,185 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 155 transitions, 504 flow [2023-08-04 08:14:10,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 08:14:10,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:14:10,186 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 08:14:10,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 08:14:10,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 08:14:10,390 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:14:10,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:14:10,390 INFO L85 PathProgramCache]: Analyzing trace with hash 287844515, now seen corresponding path program 1 times [2023-08-04 08:14:10,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:14:10,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836258760] [2023-08-04 08:14:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:14:10,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:14:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:14:10,421 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 08:14:10,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:14:10,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836258760] [2023-08-04 08:14:10,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836258760] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:14:10,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467146415] [2023-08-04 08:14:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:14:10,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:14:10,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:14:10,423 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:14:10,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:14:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:14:10,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:14:10,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:14:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:14:10,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:14:10,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467146415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:14:10,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:14:10,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:14:10,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575265559] [2023-08-04 08:14:10,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:14:10,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:14:10,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:14:10,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:14:10,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:14:10,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 438 [2023-08-04 08:14:10,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 155 transitions, 504 flow. Second operand has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 08:14:10,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:14:10,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 438 [2023-08-04 08:14:10,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:14:48,198 INFO L124 PetriNetUnfolderBase]: 300118/427545 cut-off events. [2023-08-04 08:14:48,198 INFO L125 PetriNetUnfolderBase]: For 110169/110169 co-relation queries the response was YES. [2023-08-04 08:14:52,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949720 conditions, 427545 events. 300118/427545 cut-off events. For 110169/110169 co-relation queries the response was YES. Maximal size of possible extension queue 6760. Compared 3240269 event pairs, 212644 based on Foata normal form. 0/420566 useless extension candidates. Maximal degree in co-relation 508874. Up to 338731 conditions per place. [2023-08-04 08:14:54,944 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 95 selfloop transitions, 2 changer transitions 0/173 dead transitions. [2023-08-04 08:14:54,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 173 transitions, 758 flow [2023-08-04 08:14:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:14:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:14:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-04 08:14:54,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722983257229832 [2023-08-04 08:14:54,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-04 08:14:54,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-04 08:14:54,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:14:54,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-04 08:14:54,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:14:54,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:14:54,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:14:54,949 INFO L175 Difference]: Start difference. First operand has 139 places, 155 transitions, 504 flow. Second operand 3 states and 752 transitions. [2023-08-04 08:14:54,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 173 transitions, 758 flow [2023-08-04 08:15:10,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 173 transitions, 756 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:15:10,507 INFO L231 Difference]: Finished difference. Result has 141 places, 156 transitions, 514 flow [2023-08-04 08:15:10,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=514, PETRI_PLACES=141, PETRI_TRANSITIONS=156} [2023-08-04 08:15:10,507 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, 14 predicate places. [2023-08-04 08:15:10,507 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 156 transitions, 514 flow [2023-08-04 08:15:10,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 08:15:10,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:10,508 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, 1, 1] [2023-08-04 08:15:10,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:15:10,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:10,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:10,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:10,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1766605091, now seen corresponding path program 1 times [2023-08-04 08:15:10,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:10,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569995624] [2023-08-04 08:15:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:10,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:15:10,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:10,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569995624] [2023-08-04 08:15:10,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569995624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:15:10,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907642321] [2023-08-04 08:15:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:10,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:10,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:10,773 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:15:10,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:15:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:10,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:15:10,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:15:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:15:10,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:15:10,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907642321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:10,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:15:10,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:15:10,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393103094] [2023-08-04 08:15:10,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:10,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:10,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:15:10,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 438 [2023-08-04 08:15:10,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 156 transitions, 514 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states 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 08:15:10,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:10,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 438 [2023-08-04 08:15:10,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:50,425 INFO L124 PetriNetUnfolderBase]: 303829/434012 cut-off events. [2023-08-04 08:15:50,425 INFO L125 PetriNetUnfolderBase]: For 117363/117363 co-relation queries the response was YES. [2023-08-04 08:15:54,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977274 conditions, 434012 events. 303829/434012 cut-off events. For 117363/117363 co-relation queries the response was YES. Maximal size of possible extension queue 6696. Compared 3288769 event pairs, 231949 based on Foata normal form. 0/432314 useless extension candidates. Maximal degree in co-relation 631896. Up to 368813 conditions per place. [2023-08-04 08:15:57,026 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 96 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2023-08-04 08:15:57,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 174 transitions, 770 flow [2023-08-04 08:15:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:15:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:15:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-04 08:15:57,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722983257229832 [2023-08-04 08:15:57,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-04 08:15:57,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-04 08:15:57,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:57,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-04 08:15:57,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:57,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:15:57,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states 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 08:15:57,033 INFO L175 Difference]: Start difference. First operand has 141 places, 156 transitions, 514 flow. Second operand 3 states and 752 transitions. [2023-08-04 08:15:57,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 174 transitions, 770 flow [2023-08-04 08:16:22,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 174 transitions, 768 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:16:22,840 INFO L231 Difference]: Finished difference. Result has 143 places, 157 transitions, 524 flow [2023-08-04 08:16:22,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=524, PETRI_PLACES=143, PETRI_TRANSITIONS=157} [2023-08-04 08:16:22,840 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, 16 predicate places. [2023-08-04 08:16:22,840 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 157 transitions, 524 flow [2023-08-04 08:16:22,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states 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 08:16:22,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:16:22,841 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:16:22,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 08:16:23,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 08:16:23,045 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:16:23,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:16:23,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1169775183, now seen corresponding path program 1 times [2023-08-04 08:16:23,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:16:23,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143816262] [2023-08-04 08:16:23,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:23,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:16:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:16:23,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:16:23,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143816262] [2023-08-04 08:16:23,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143816262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:16:23,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368140352] [2023-08-04 08:16:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:23,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:16:23,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:16:23,081 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:16:23,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:16:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:23,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:16:23,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:16:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:16:23,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:16:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:16:23,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368140352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:16:23,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:16:23,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:16:23,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27861587] [2023-08-04 08:16:23,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:16:23,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:16:23,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:16:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:16:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:16:23,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 438 [2023-08-04 08:16:23,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 157 transitions, 524 flow. Second operand has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 08:16:23,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:16:23,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 438 [2023-08-04 08:16:23,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:17:01,036 INFO L124 PetriNetUnfolderBase]: 293031/416666 cut-off events. [2023-08-04 08:17:01,036 INFO L125 PetriNetUnfolderBase]: For 113070/113070 co-relation queries the response was YES. [2023-08-04 08:17:05,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946865 conditions, 416666 events. 293031/416666 cut-off events. For 113070/113070 co-relation queries the response was YES. Maximal size of possible extension queue 6843. Compared 3144053 event pairs, 183655 based on Foata normal form. 2/416667 useless extension candidates. Maximal degree in co-relation 819114. Up to 387347 conditions per place. [2023-08-04 08:17:07,704 INFO L140 encePairwiseOnDemand]: 434/438 looper letters, 82 selfloop transitions, 4 changer transitions 0/162 dead transitions. [2023-08-04 08:17:07,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 162 transitions, 706 flow [2023-08-04 08:17:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:17:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:17:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 956 transitions. [2023-08-04 08:17:07,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545662100456621 [2023-08-04 08:17:07,706 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 956 transitions. [2023-08-04 08:17:07,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 956 transitions. [2023-08-04 08:17:07,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:17:07,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 956 transitions. [2023-08-04 08:17:07,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states 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 08:17:07,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states 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 08:17:07,709 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states 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 08:17:07,709 INFO L175 Difference]: Start difference. First operand has 143 places, 157 transitions, 524 flow. Second operand 4 states and 956 transitions. [2023-08-04 08:17:07,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 162 transitions, 706 flow [2023-08-04 08:17:33,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 162 transitions, 704 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:17:33,198 INFO L231 Difference]: Finished difference. Result has 147 places, 158 transitions, 542 flow [2023-08-04 08:17:33,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=542, PETRI_PLACES=147, PETRI_TRANSITIONS=158} [2023-08-04 08:17:33,199 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, 20 predicate places. [2023-08-04 08:17:33,199 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 158 transitions, 542 flow [2023-08-04 08:17:33,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.2) internal successors, (1136), 5 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states 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 08:17:33,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:17:33,199 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:33,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 08:17:33,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:33,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:17:33,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:17:33,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1729250127, now seen corresponding path program 1 times [2023-08-04 08:17:33,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:17:33,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599066311] [2023-08-04 08:17:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:33,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:17:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:17:33,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:17:33,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599066311] [2023-08-04 08:17:33,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599066311] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:17:33,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130325491] [2023-08-04 08:17:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:33,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:33,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:17:33,445 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:17:33,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 08:17:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:33,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:17:33,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:17:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:17:33,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:17:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:17:33,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130325491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:17:33,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:17:33,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:17:33,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608638233] [2023-08-04 08:17:33,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:17:33,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:17:33,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:17:33,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:17:33,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:17:33,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 438 [2023-08-04 08:17:33,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 158 transitions, 542 flow. Second operand has 5 states, 5 states have (on average 227.4) internal successors, (1137), 5 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states 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 08:17:33,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:17:33,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 438 [2023-08-04 08:17:33,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:18:11,347 INFO L124 PetriNetUnfolderBase]: 285055/404100 cut-off events. [2023-08-04 08:18:11,347 INFO L125 PetriNetUnfolderBase]: For 106214/106214 co-relation queries the response was YES. [2023-08-04 08:18:15,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919082 conditions, 404100 events. 285055/404100 cut-off events. For 106214/106214 co-relation queries the response was YES. Maximal size of possible extension queue 7159. Compared 3045000 event pairs, 180196 based on Foata normal form. 8/404107 useless extension candidates. Maximal degree in co-relation 793027. Up to 376987 conditions per place. [2023-08-04 08:18:17,540 INFO L140 encePairwiseOnDemand]: 434/438 looper letters, 87 selfloop transitions, 4 changer transitions 0/167 dead transitions. [2023-08-04 08:18:17,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 167 transitions, 742 flow [2023-08-04 08:18:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:18:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:18:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 960 transitions. [2023-08-04 08:18:17,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547945205479452 [2023-08-04 08:18:17,542 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 960 transitions. [2023-08-04 08:18:17,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 960 transitions. [2023-08-04 08:18:17,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:18:17,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 960 transitions. [2023-08-04 08:18:17,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 08:18:17,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states 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 08:18:17,545 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states 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 08:18:17,545 INFO L175 Difference]: Start difference. First operand has 147 places, 158 transitions, 542 flow. Second operand 4 states and 960 transitions. [2023-08-04 08:18:17,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 167 transitions, 742 flow [2023-08-04 08:18:37,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 167 transitions, 738 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:18:37,879 INFO L231 Difference]: Finished difference. Result has 151 places, 159 transitions, 558 flow [2023-08-04 08:18:37,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=558, PETRI_PLACES=151, PETRI_TRANSITIONS=159} [2023-08-04 08:18:37,879 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, 24 predicate places. [2023-08-04 08:18:37,880 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 159 transitions, 558 flow [2023-08-04 08:18:37,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.4) internal successors, (1137), 5 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states 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 08:18:37,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:18:37,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:37,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 08:18:38,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:18:38,084 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:18:38,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:18:38,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1980663141, now seen corresponding path program 1 times [2023-08-04 08:18:38,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:18:38,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537013148] [2023-08-04 08:18:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:18:38,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:18:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:18:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:18:38,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:18:38,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537013148] [2023-08-04 08:18:38,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537013148] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:18:38,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830979964] [2023-08-04 08:18:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:18:38,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:18:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:18:38,134 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:18:38,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 08:18:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:18:38,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:18:38,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:18:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:18:38,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:18:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:18:38,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830979964] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:18:38,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:18:38,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:18:38,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771055818] [2023-08-04 08:18:38,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:18:38,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:18:38,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:18:38,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:18:38,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:18:38,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 438 [2023-08-04 08:18:38,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 159 transitions, 558 flow. Second operand has 5 states, 5 states have (on average 227.6) internal successors, (1138), 5 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states 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 08:18:38,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:18:38,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 438 [2023-08-04 08:18:38,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:16,465 INFO L124 PetriNetUnfolderBase]: 279423/395468 cut-off events. [2023-08-04 08:19:16,465 INFO L125 PetriNetUnfolderBase]: For 103942/103942 co-relation queries the response was YES. [2023-08-04 08:19:20,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901195 conditions, 395468 events. 279423/395468 cut-off events. For 103942/103942 co-relation queries the response was YES. Maximal size of possible extension queue 7213. Compared 2973464 event pairs, 177975 based on Foata normal form. 32/395499 useless extension candidates. Maximal degree in co-relation 775138. Up to 369115 conditions per place. [2023-08-04 08:19:22,975 INFO L140 encePairwiseOnDemand]: 434/438 looper letters, 92 selfloop transitions, 4 changer transitions 0/172 dead transitions. [2023-08-04 08:19:22,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 172 transitions, 776 flow [2023-08-04 08:19:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:19:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:19:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 964 transitions. [2023-08-04 08:19:22,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502283105022832 [2023-08-04 08:19:22,977 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 964 transitions. [2023-08-04 08:19:22,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 964 transitions. [2023-08-04 08:19:22,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:22,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 964 transitions. [2023-08-04 08:19:22,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states 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 08:19:22,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states 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 08:19:22,981 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states 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 08:19:22,981 INFO L175 Difference]: Start difference. First operand has 151 places, 159 transitions, 558 flow. Second operand 4 states and 964 transitions. [2023-08-04 08:19:22,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 172 transitions, 776 flow [2023-08-04 08:19:44,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 172 transitions, 772 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:44,131 INFO L231 Difference]: Finished difference. Result has 155 places, 160 transitions, 574 flow [2023-08-04 08:19:44,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=574, PETRI_PLACES=155, PETRI_TRANSITIONS=160} [2023-08-04 08:19:44,132 INFO L281 CegarLoopForPetriNet]: 127 programPoint places, 28 predicate places. [2023-08-04 08:19:44,132 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 160 transitions, 574 flow [2023-08-04 08:19:44,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.6) internal successors, (1138), 5 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states 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 08:19:44,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:44,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:44,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:44,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:44,332 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:44,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash -824866394, now seen corresponding path program 1 times [2023-08-04 08:19:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:44,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264525971] [2023-08-04 08:19:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:44,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:19:44,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:44,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264525971] [2023-08-04 08:19:44,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264525971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:44,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591006059] [2023-08-04 08:19:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:44,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:44,374 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:19:44,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 08:19:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:44,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:19:44,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:19:44,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:19:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:19:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591006059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:19:44,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:19:44,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:19:44,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978807616] [2023-08-04 08:19:44,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:19:44,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:19:44,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:19:44,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:44,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 438 [2023-08-04 08:19:44,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 160 transitions, 574 flow. Second operand has 5 states, 5 states have (on average 227.8) internal successors, (1139), 5 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states 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 08:19:44,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:44,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 438 [2023-08-04 08:19:44,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-04 08:20:09,418 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 08:20:09,440 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 08:20:10,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:10,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:12,823 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:20:12,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 08:20:12,824 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-04 08:20:12,824 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:12,824 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2023-08-04 08:20:12,825 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:20:12,825 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:20:12,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:20:12 BasicIcfg [2023-08-04 08:20:12,827 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:20:12,828 INFO L158 Benchmark]: Toolchain (without parser) took 646111.08ms. Allocated memory was 604.0MB in the beginning and 16.0GB in the end (delta: 15.4GB). Free memory was 554.8MB in the beginning and 12.3GB in the end (delta: -11.7GB). Peak memory consumption was 9.2GB. Max. memory is 16.0GB. [2023-08-04 08:20:12,828 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 377.5MB. Free memory is still 327.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:20:12,828 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.21ms. Allocated memory is still 604.0MB. Free memory was 554.4MB in the beginning and 542.6MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 08:20:12,828 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.57ms. Allocated memory is still 604.0MB. Free memory was 542.3MB in the beginning and 540.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:20:12,828 INFO L158 Benchmark]: Boogie Preprocessor took 18.86ms. Allocated memory is still 604.0MB. Free memory was 540.6MB in the beginning and 538.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:20:12,828 INFO L158 Benchmark]: RCFGBuilder took 393.48ms. Allocated memory is still 604.0MB. Free memory was 538.8MB in the beginning and 520.0MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 08:20:12,831 INFO L158 Benchmark]: TraceAbstraction took 645472.39ms. Allocated memory was 604.0MB in the beginning and 16.0GB in the end (delta: 15.4GB). Free memory was 519.2MB in the beginning and 12.3GB in the end (delta: -11.7GB). Peak memory consumption was 9.2GB. Max. memory is 16.0GB. [2023-08-04 08:20:12,832 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 377.5MB. Free memory is still 327.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 190.21ms. Allocated memory is still 604.0MB. Free memory was 554.4MB in the beginning and 542.6MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.57ms. Allocated memory is still 604.0MB. Free memory was 542.3MB in the beginning and 540.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.86ms. Allocated memory is still 604.0MB. Free memory was 540.6MB in the beginning and 538.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 393.48ms. Allocated memory is still 604.0MB. Free memory was 538.8MB in the beginning and 520.0MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 645472.39ms. Allocated memory was 604.0MB in the beginning and 16.0GB in the end (delta: 15.4GB). Free memory was 519.2MB in the beginning and 12.3GB in the end (delta: -11.7GB). Peak memory consumption was 9.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 190 PlacesBefore, 75 PlacesAfterwards, 215 TransitionsBefore, 86 TransitionsAfterwards, 11424 CoEnabledTransitionPairs, 6 FixpointIterations, 40 TrivialSequentialCompositions, 68 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 26 ConcurrentYvCompositions, 14 ChoiceCompositions, 149 TotalNumberOfCompositions, 48078 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 44393, independent: 44056, independent conditional: 0, independent unconditional: 44056, dependent: 337, dependent conditional: 0, dependent unconditional: 337, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6362, independent: 6251, independent conditional: 0, independent unconditional: 6251, dependent: 111, dependent conditional: 0, dependent unconditional: 111, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 44393, independent: 37805, independent conditional: 0, independent unconditional: 37805, dependent: 226, dependent conditional: 0, dependent unconditional: 226, unknown: 6362, unknown conditional: 0, unknown unconditional: 6362] , Statistics on independence cache: Total cache size (in pairs): 1644, Positive cache size: 1616, Positive conditional cache size: 0, Positive unconditional cache size: 1616, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.9s, 190 PlacesBefore, 75 PlacesAfterwards, 215 TransitionsBefore, 86 TransitionsAfterwards, 11424 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 68 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 26 ConcurrentYvCompositions, 14 ChoiceCompositions, 148 TotalNumberOfCompositions, 47958 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 42439, independent: 42102, independent conditional: 0, independent unconditional: 42102, dependent: 337, dependent conditional: 0, dependent unconditional: 337, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6364, independent: 6253, independent conditional: 0, independent unconditional: 6253, dependent: 111, dependent conditional: 0, dependent unconditional: 111, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 42439, independent: 35849, independent conditional: 0, independent unconditional: 35849, dependent: 226, dependent conditional: 0, dependent unconditional: 226, unknown: 6364, unknown conditional: 0, unknown unconditional: 6364] , Statistics on independence cache: Total cache size (in pairs): 1650, Positive cache size: 1622, Positive conditional cache size: 0, Positive unconditional cache size: 1622, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.5s, 242 PlacesBefore, 127 PlacesAfterwards, 283 TransitionsBefore, 150 TransitionsAfterwards, 30912 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 63 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 34 ConcurrentYvCompositions, 18 ChoiceCompositions, 155 TotalNumberOfCompositions, 201628 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 97668, independent: 96704, independent conditional: 0, independent unconditional: 96704, dependent: 964, dependent conditional: 0, dependent unconditional: 964, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 15050, independent: 14912, independent conditional: 0, independent unconditional: 14912, dependent: 138, dependent conditional: 0, dependent unconditional: 138, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 97668, independent: 81792, independent conditional: 0, independent unconditional: 81792, dependent: 826, dependent conditional: 0, dependent unconditional: 826, unknown: 15050, unknown conditional: 0, unknown unconditional: 15050] , Statistics on independence cache: Total cache size (in pairs): 4941, Positive cache size: 4877, Positive conditional cache size: 0, Positive unconditional cache size: 4877, Negative cache size: 64, Negative conditional cache size: 0, Negative unconditional cache size: 64, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 116]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 226 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13.1s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 215 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 125 mSDsluCounter, 21 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 975 IncrementalHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 21 mSDtfsCounter, 975 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 258 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=279occurred in iteration=8, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 409 NumberOfCodeBlocks, 409 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 432 ConstructedInterpolants, 0 QuantifiedInterpolants, 540 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1308 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 18 InterpolantComputations, 8 PerfectInterpolantSequences, 70/80 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 13 procedures, 270 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 629.1s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 618.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 318 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 206 mSDsluCounter, 21 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2170 IncrementalHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 21 mSDtfsCounter, 2170 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 612 GetRequests, 570 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=574occurred in iteration=11, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 779 NumberOfCodeBlocks, 779 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 956 ConstructedInterpolants, 0 QuantifiedInterpolants, 1180 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2057 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 27 InterpolantComputations, 8 PerfectInterpolantSequences, 223/242 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 9 procedures, 226 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.1s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=240occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown