./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-simple/nested_4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 19:54:10,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 19:54:10,936 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 19:54:10,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 19:54:10,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 19:54:10,974 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 19:54:10,976 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 19:54:10,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 19:54:10,977 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 19:54:10,977 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 19:54:10,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 19:54:10,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 19:54:10,978 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 19:54:10,979 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 19:54:10,979 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 19:54:10,979 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 19:54:10,980 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 19:54:10,980 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 19:54:10,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 19:54:10,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 19:54:10,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 19:54:10,982 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 19:54:10,982 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 19:54:10,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 19:54:10,983 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 19:54:10,983 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 19:54:10,983 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 19:54:10,984 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 19:54:10,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 19:54:10,984 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 19:54:10,985 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 19:54:10,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 19:54:10,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:54:10,986 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 19:54:10,986 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 19:54:10,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 19:54:10,986 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 19:54:10,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 19:54:10,987 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 19:54:10,987 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 19:54:10,987 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 19:54:10,988 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 19:54:10,988 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf [2024-11-11 19:54:11,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 19:54:11,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 19:54:11,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 19:54:11,278 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 19:54:11,278 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 19:54:11,279 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_4.c [2024-11-11 19:54:12,677 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 19:54:12,857 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 19:54:12,859 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_4.c [2024-11-11 19:54:12,868 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa32ce922/e397edd9fd304231847f95a0604c1b74/FLAGa134064dd [2024-11-11 19:54:13,243 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa32ce922/e397edd9fd304231847f95a0604c1b74 [2024-11-11 19:54:13,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 19:54:13,247 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 19:54:13,248 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 19:54:13,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 19:54:13,254 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 19:54:13,254 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3010e498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13, skipping insertion in model container [2024-11-11 19:54:13,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,276 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 19:54:13,536 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2024-11-11 19:54:13,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:54:13,551 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 19:54:13,566 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2024-11-11 19:54:13,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:54:13,584 INFO L204 MainTranslator]: Completed translation [2024-11-11 19:54:13,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13 WrapperNode [2024-11-11 19:54:13,585 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 19:54:13,587 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 19:54:13,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 19:54:13,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 19:54:13,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,601 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,615 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2024-11-11 19:54:13,615 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 19:54:13,616 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 19:54:13,616 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 19:54:13,616 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 19:54:13,627 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,629 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,640 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-11 19:54:13,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,642 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,647 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,647 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,650 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,651 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 19:54:13,652 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 19:54:13,652 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 19:54:13,653 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 19:54:13,654 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (1/1) ... [2024-11-11 19:54:13,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:54:13,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:54:13,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-11 19:54:13,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-11 19:54:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 19:54:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 19:54:13,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 19:54:13,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 19:54:13,782 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 19:54:13,784 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 19:54:13,885 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-11 19:54:13,885 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 19:54:13,896 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 19:54:13,897 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-11 19:54:13,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:54:13 BoogieIcfgContainer [2024-11-11 19:54:13,897 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 19:54:13,899 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 19:54:13,899 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 19:54:13,902 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 19:54:13,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 07:54:13" (1/3) ... [2024-11-11 19:54:13,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfcd63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:54:13, skipping insertion in model container [2024-11-11 19:54:13,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:54:13" (2/3) ... [2024-11-11 19:54:13,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfcd63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:54:13, skipping insertion in model container [2024-11-11 19:54:13,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:54:13" (3/3) ... [2024-11-11 19:54:13,905 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_4.c [2024-11-11 19:54:13,919 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 19:54:13,920 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 19:54:13,965 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 19:54:13,971 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1604fcad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 19:54:13,971 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 19:54:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-11 19:54:13,980 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:13,981 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-11 19:54:13,982 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:13,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:13,986 INFO L85 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2024-11-11 19:54:13,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:13,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843950395] [2024-11-11 19:54:13,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:13,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:14,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:14,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843950395] [2024-11-11 19:54:14,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843950395] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:54:14,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:54:14,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 19:54:14,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429302865] [2024-11-11 19:54:14,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:54:14,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 19:54:14,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:14,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 19:54:14,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 19:54:14,131 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:14,141 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2024-11-11 19:54:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 19:54:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-11 19:54:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:14,148 INFO L225 Difference]: With dead ends: 32 [2024-11-11 19:54:14,148 INFO L226 Difference]: Without dead ends: 13 [2024-11-11 19:54:14,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 19:54:14,153 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:14,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:54:14,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-11 19:54:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-11 19:54:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-11-11 19:54:14,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2024-11-11 19:54:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:14,186 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-11-11 19:54:14,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2024-11-11 19:54:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-11 19:54:14,187 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:14,187 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-11 19:54:14,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 19:54:14,188 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:14,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:14,188 INFO L85 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2024-11-11 19:54:14,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:14,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349895928] [2024-11-11 19:54:14,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:14,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:14,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349895928] [2024-11-11 19:54:14,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349895928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:54:14,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:54:14,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 19:54:14,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237205860] [2024-11-11 19:54:14,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:54:14,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 19:54:14,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:14,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 19:54:14,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 19:54:14,284 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:14,299 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2024-11-11 19:54:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 19:54:14,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-11 19:54:14,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:14,300 INFO L225 Difference]: With dead ends: 24 [2024-11-11 19:54:14,301 INFO L226 Difference]: Without dead ends: 21 [2024-11-11 19:54:14,301 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 19:54:14,302 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:14,303 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:54:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-11 19:54:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2024-11-11 19:54:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-11-11 19:54:14,307 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2024-11-11 19:54:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:14,307 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-11-11 19:54:14,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-11-11 19:54:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-11 19:54:14,308 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:14,308 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:54:14,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 19:54:14,309 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:14,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:14,309 INFO L85 PathProgramCache]: Analyzing trace with hash 270060130, now seen corresponding path program 1 times [2024-11-11 19:54:14,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:14,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668744847] [2024-11-11 19:54:14,310 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:14,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:14,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:14,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668744847] [2024-11-11 19:54:14,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668744847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:54:14,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:54:14,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 19:54:14,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916274438] [2024-11-11 19:54:14,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:54:14,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 19:54:14,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 19:54:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 19:54:14,394 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:14,410 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-11-11 19:54:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 19:54:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-11 19:54:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:14,412 INFO L225 Difference]: With dead ends: 31 [2024-11-11 19:54:14,413 INFO L226 Difference]: Without dead ends: 20 [2024-11-11 19:54:14,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 19:54:14,415 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:14,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:54:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-11 19:54:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2024-11-11 19:54:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-11-11 19:54:14,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2024-11-11 19:54:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:14,425 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-11-11 19:54:14,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-11-11 19:54:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-11 19:54:14,426 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:14,427 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:54:14,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-11 19:54:14,428 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:14,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1248345450, now seen corresponding path program 1 times [2024-11-11 19:54:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:14,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307660064] [2024-11-11 19:54:14,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:14,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:14,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:14,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307660064] [2024-11-11 19:54:14,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307660064] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:54:14,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:54:14,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 19:54:14,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884468905] [2024-11-11 19:54:14,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:54:14,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 19:54:14,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:14,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 19:54:14,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 19:54:14,510 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:14,530 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-11-11 19:54:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 19:54:14,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-11 19:54:14,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:14,532 INFO L225 Difference]: With dead ends: 31 [2024-11-11 19:54:14,532 INFO L226 Difference]: Without dead ends: 19 [2024-11-11 19:54:14,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 19:54:14,534 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:14,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:54:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-11 19:54:14,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2024-11-11 19:54:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-11-11 19:54:14,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2024-11-11 19:54:14,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:14,539 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-11-11 19:54:14,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-11-11 19:54:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-11 19:54:14,540 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:14,540 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:54:14,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-11 19:54:14,541 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:14,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash -793045314, now seen corresponding path program 1 times [2024-11-11 19:54:14,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:14,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112970441] [2024-11-11 19:54:14,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:14,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:14,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:14,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112970441] [2024-11-11 19:54:14,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112970441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:54:14,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:54:14,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 19:54:14,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493211721] [2024-11-11 19:54:14,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:54:14,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 19:54:14,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:14,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 19:54:14,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 19:54:14,606 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:14,623 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-11-11 19:54:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 19:54:14,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-11 19:54:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:14,624 INFO L225 Difference]: With dead ends: 31 [2024-11-11 19:54:14,624 INFO L226 Difference]: Without dead ends: 18 [2024-11-11 19:54:14,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 19:54:14,626 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:14,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:54:14,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-11 19:54:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2024-11-11 19:54:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-11-11 19:54:14,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2024-11-11 19:54:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:14,631 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-11-11 19:54:14,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-11-11 19:54:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-11 19:54:14,634 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:14,634 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:54:14,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-11 19:54:14,635 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:14,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:14,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1973513092, now seen corresponding path program 1 times [2024-11-11 19:54:14,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:14,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150517024] [2024-11-11 19:54:14,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:14,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:14,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:14,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150517024] [2024-11-11 19:54:14,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150517024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:54:14,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121010393] [2024-11-11 19:54:14,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:14,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:14,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:54:14,696 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) [2024-11-11 19:54:14,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 19:54:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:14,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-11 19:54:14,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:54:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:14,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:54:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:14,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121010393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:54:14,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:54:14,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-11 19:54:14,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3230450] [2024-11-11 19:54:14,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:54:14,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-11 19:54:14,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:14,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-11 19:54:14,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-11 19:54:14,841 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:14,879 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2024-11-11 19:54:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 19:54:14,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-11 19:54:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:14,880 INFO L225 Difference]: With dead ends: 37 [2024-11-11 19:54:14,880 INFO L226 Difference]: Without dead ends: 23 [2024-11-11 19:54:14,881 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-11 19:54:14,882 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:14,882 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 44 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:54:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-11 19:54:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-11 19:54:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-11-11 19:54:14,887 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2024-11-11 19:54:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:14,887 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-11-11 19:54:14,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-11-11 19:54:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-11 19:54:14,888 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:14,888 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:54:14,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 19:54:15,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-11 19:54:15,089 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:15,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:15,090 INFO L85 PathProgramCache]: Analyzing trace with hash -430063434, now seen corresponding path program 2 times [2024-11-11 19:54:15,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:15,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425619047] [2024-11-11 19:54:15,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:15,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-11 19:54:15,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:15,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425619047] [2024-11-11 19:54:15,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425619047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:54:15,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300377576] [2024-11-11 19:54:15,227 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 19:54:15,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:15,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:54:15,229 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) [2024-11-11 19:54:15,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 19:54:15,275 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 19:54:15,276 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:54:15,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-11 19:54:15,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:54:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:15,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:54:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:54:15,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300377576] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:54:15,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:54:15,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2024-11-11 19:54:15,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676324166] [2024-11-11 19:54:15,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:54:15,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-11 19:54:15,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:15,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-11 19:54:15,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-11 19:54:15,420 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:15,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:15,587 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2024-11-11 19:54:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-11 19:54:15,587 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-11 19:54:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:15,588 INFO L225 Difference]: With dead ends: 76 [2024-11-11 19:54:15,588 INFO L226 Difference]: Without dead ends: 56 [2024-11-11 19:54:15,589 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2024-11-11 19:54:15,589 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:15,590 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:54:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-11 19:54:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2024-11-11 19:54:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-11-11 19:54:15,599 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 22 [2024-11-11 19:54:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:15,599 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-11-11 19:54:15,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-11-11 19:54:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-11 19:54:15,600 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:15,600 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:54:15,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-11 19:54:15,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-11 19:54:15,805 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:15,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:15,805 INFO L85 PathProgramCache]: Analyzing trace with hash -340835222, now seen corresponding path program 3 times [2024-11-11 19:54:15,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:15,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994390259] [2024-11-11 19:54:15,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:15,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2024-11-11 19:54:15,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:15,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994390259] [2024-11-11 19:54:15,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994390259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:54:15,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012395073] [2024-11-11 19:54:15,870 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 19:54:15,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:15,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:54:15,872 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) [2024-11-11 19:54:15,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 19:54:15,910 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-11 19:54:15,910 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:54:15,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-11 19:54:15,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:54:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-11 19:54:15,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:54:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-11 19:54:16,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012395073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:54:16,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:54:16,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-11 19:54:16,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818746105] [2024-11-11 19:54:16,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:54:16,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 19:54:16,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 19:54:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-11 19:54:16,048 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:16,215 INFO L93 Difference]: Finished difference Result 449 states and 500 transitions. [2024-11-11 19:54:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-11 19:54:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-11 19:54:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:16,220 INFO L225 Difference]: With dead ends: 449 [2024-11-11 19:54:16,220 INFO L226 Difference]: Without dead ends: 410 [2024-11-11 19:54:16,221 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2024-11-11 19:54:16,226 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:16,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 53 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:54:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2024-11-11 19:54:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 282. [2024-11-11 19:54:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.103202846975089) internal successors, (310), 281 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 310 transitions. [2024-11-11 19:54:16,284 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 310 transitions. Word has length 41 [2024-11-11 19:54:16,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:16,286 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 310 transitions. [2024-11-11 19:54:16,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:16,287 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 310 transitions. [2024-11-11 19:54:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2024-11-11 19:54:16,296 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:16,296 INFO L218 NwaCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-11 19:54:16,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 19:54:16,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:16,497 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:16,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1674088742, now seen corresponding path program 4 times [2024-11-11 19:54:16,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:16,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289596407] [2024-11-11 19:54:16,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:16,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2024-11-11 19:54:16,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:16,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289596407] [2024-11-11 19:54:16,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289596407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:54:16,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580151445] [2024-11-11 19:54:16,804 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 19:54:16,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:54:16,806 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) [2024-11-11 19:54:16,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 19:54:16,939 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 19:54:16,940 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:54:16,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-11 19:54:16,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:54:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2024-11-11 19:54:17,018 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:54:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2024-11-11 19:54:17,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580151445] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:54:17,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:54:17,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-11 19:54:17,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659220319] [2024-11-11 19:54:17,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:54:17,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-11 19:54:17,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:17,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-11 19:54:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-11 19:54:17,113 INFO L87 Difference]: Start difference. First operand 282 states and 310 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:17,228 INFO L93 Difference]: Finished difference Result 1009 states and 1126 transitions. [2024-11-11 19:54:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 19:54:17,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2024-11-11 19:54:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:17,232 INFO L225 Difference]: With dead ends: 1009 [2024-11-11 19:54:17,232 INFO L226 Difference]: Without dead ends: 762 [2024-11-11 19:54:17,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-11 19:54:17,234 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:17,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:54:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2024-11-11 19:54:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 762. [2024-11-11 19:54:17,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.0801576872536136) internal successors, (822), 761 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 822 transitions. [2024-11-11 19:54:17,333 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 822 transitions. Word has length 281 [2024-11-11 19:54:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:17,334 INFO L471 AbstractCegarLoop]: Abstraction has 762 states and 822 transitions. [2024-11-11 19:54:17,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:17,335 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 822 transitions. [2024-11-11 19:54:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2024-11-11 19:54:17,356 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:17,357 INFO L218 NwaCegarLoop]: trace histogram [288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-11 19:54:17,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 19:54:17,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:17,558 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:17,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:17,558 INFO L85 PathProgramCache]: Analyzing trace with hash 388372774, now seen corresponding path program 5 times [2024-11-11 19:54:17,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:17,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813034061] [2024-11-11 19:54:17,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:17,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 37783 proven. 3149 refuted. 0 times theorem prover too weak. 59454 trivial. 0 not checked. [2024-11-11 19:54:18,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:18,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813034061] [2024-11-11 19:54:18,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813034061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:54:18,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163925534] [2024-11-11 19:54:18,183 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 19:54:18,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:18,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:54:18,185 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) [2024-11-11 19:54:18,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 19:54:18,384 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) [2024-11-11 19:54:18,384 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:54:18,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-11 19:54:18,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:54:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 62974 proven. 3149 refuted. 0 times theorem prover too weak. 34263 trivial. 0 not checked. [2024-11-11 19:54:18,642 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:54:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 62974 proven. 3149 refuted. 0 times theorem prover too weak. 34263 trivial. 0 not checked. [2024-11-11 19:54:18,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163925534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:54:18,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:54:18,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-11 19:54:18,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652509680] [2024-11-11 19:54:18,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:54:18,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-11 19:54:18,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-11 19:54:18,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-11 19:54:18,908 INFO L87 Difference]: Start difference. First operand 762 states and 822 transitions. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:19,098 INFO L93 Difference]: Finished difference Result 2822 states and 3055 transitions. [2024-11-11 19:54:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 19:54:19,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 761 [2024-11-11 19:54:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:19,109 INFO L225 Difference]: With dead ends: 2822 [2024-11-11 19:54:19,109 INFO L226 Difference]: Without dead ends: 2250 [2024-11-11 19:54:19,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1525 GetRequests, 1518 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-11 19:54:19,114 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:19,114 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 62 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:54:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2024-11-11 19:54:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2250. [2024-11-11 19:54:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 1.0769230769230769) internal successors, (2422), 2249 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 2422 transitions. [2024-11-11 19:54:19,315 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 2422 transitions. Word has length 761 [2024-11-11 19:54:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:19,317 INFO L471 AbstractCegarLoop]: Abstraction has 2250 states and 2422 transitions. [2024-11-11 19:54:19,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 2422 transitions. [2024-11-11 19:54:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2250 [2024-11-11 19:54:19,427 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:54:19,430 INFO L218 NwaCegarLoop]: trace histogram [864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-11 19:54:19,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-11 19:54:19,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-11 19:54:19,630 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:54:19,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:54:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash 994878758, now seen corresponding path program 6 times [2024-11-11 19:54:19,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:54:19,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110658220] [2024-11-11 19:54:19,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:54:19,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:54:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:54:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 905338 backedges. 0 proven. 679846 refuted. 0 times theorem prover too weak. 225492 trivial. 0 not checked. [2024-11-11 19:54:22,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:54:22,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110658220] [2024-11-11 19:54:22,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110658220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:54:22,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073849030] [2024-11-11 19:54:22,889 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-11 19:54:22,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:22,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:54:22,891 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) [2024-11-11 19:54:22,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 19:54:24,204 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 377 check-sat command(s) [2024-11-11 19:54:24,204 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:54:24,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 2162 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-11 19:54:24,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:54:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 905338 backedges. 355658 proven. 1347 refuted. 0 times theorem prover too weak. 548333 trivial. 0 not checked. [2024-11-11 19:54:25,813 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:54:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 905338 backedges. 339922 proven. 17083 refuted. 0 times theorem prover too weak. 548333 trivial. 0 not checked. [2024-11-11 19:54:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073849030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:54:28,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:54:28,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 21, 21] total 43 [2024-11-11 19:54:28,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657470095] [2024-11-11 19:54:28,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:54:28,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-11 19:54:28,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:54:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-11 19:54:28,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2024-11-11 19:54:28,337 INFO L87 Difference]: Start difference. First operand 2250 states and 2422 transitions. Second operand has 43 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 43 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:30,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:54:30,826 INFO L93 Difference]: Finished difference Result 5540 states and 5968 transitions. [2024-11-11 19:54:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2024-11-11 19:54:30,827 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 43 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2249 [2024-11-11 19:54:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:54:30,833 INFO L225 Difference]: With dead ends: 5540 [2024-11-11 19:54:30,833 INFO L226 Difference]: Without dead ends: 0 [2024-11-11 19:54:30,855 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4598 GetRequests, 4462 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5663 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2980, Invalid=15926, Unknown=0, NotChecked=0, Total=18906 [2024-11-11 19:54:30,857 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 299 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 19:54:30,857 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 249 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 19:54:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-11 19:54:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-11 19:54:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-11 19:54:30,860 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2249 [2024-11-11 19:54:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:54:30,861 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-11 19:54:30,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.7906976744186047) internal successors, (163), 43 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:54:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-11 19:54:30,861 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-11 19:54:30,864 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-11 19:54:30,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-11 19:54:31,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:54:31,073 INFO L421 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1] [2024-11-11 19:54:31,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.