./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 21:03:21,711 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 21:03:21,765 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 21:03:21,770 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 21:03:21,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 21:03:21,795 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 21:03:21,797 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 21:03:21,797 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 21:03:21,798 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 21:03:21,799 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 21:03:21,799 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 21:03:21,799 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 21:03:21,800 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 21:03:21,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 21:03:21,801 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 21:03:21,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 21:03:21,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 21:03:21,802 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 21:03:21,802 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 21:03:21,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 21:03:21,804 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 21:03:21,805 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 21:03:21,805 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 21:03:21,805 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 21:03:21,806 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 21:03:21,806 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 21:03:21,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 21:03:21,806 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 21:03:21,808 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 21:03:21,808 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 21:03:21,808 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 21:03:21,809 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 21:03:21,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 21:03:21,809 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 21:03:21,809 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 21:03:21,809 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 21:03:21,809 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 21:03:21,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 21:03:21,810 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 21:03:21,810 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 21:03:21,810 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 21:03:21,811 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 21:03:21,812 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2024-11-19 21:03:22,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 21:03:22,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 21:03:22,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 21:03:22,025 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 21:03:22,025 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 21:03:22,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c [2024-11-19 21:03:23,250 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 21:03:23,384 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 21:03:23,384 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c [2024-11-19 21:03:23,391 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5d63a9d9/11585cacb0ee4c1299f1527f87f01436/FLAGf7747b78c [2024-11-19 21:03:23,807 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5d63a9d9/11585cacb0ee4c1299f1527f87f01436 [2024-11-19 21:03:23,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 21:03:23,809 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 21:03:23,810 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 21:03:23,810 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 21:03:23,814 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 21:03:23,815 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:23,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ced9f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23, skipping insertion in model container [2024-11-19 21:03:23,816 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:23,828 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 21:03:23,936 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/loops-crafted-1/in-de62.c[368,381] [2024-11-19 21:03:23,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 21:03:23,953 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 21:03:23,961 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/loops-crafted-1/in-de62.c[368,381] [2024-11-19 21:03:23,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 21:03:23,992 INFO L204 MainTranslator]: Completed translation [2024-11-19 21:03:23,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23 WrapperNode [2024-11-19 21:03:23,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 21:03:23,994 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 21:03:23,995 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 21:03:23,995 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 21:03:24,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,007 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,019 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2024-11-19 21:03:24,019 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 21:03:24,020 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 21:03:24,020 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 21:03:24,020 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 21:03:24,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,029 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,036 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]. [2024-11-19 21:03:24,036 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,037 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,039 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,043 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 21:03:24,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 21:03:24,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 21:03:24,044 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 21:03:24,045 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (1/1) ... [2024-11-19 21:03:24,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 21:03:24,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:24,092 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) [2024-11-19 21:03:24,096 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 [2024-11-19 21:03:24,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 21:03:24,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 21:03:24,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 21:03:24,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 21:03:24,181 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 21:03:24,182 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 21:03:24,299 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-19 21:03:24,300 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 21:03:24,308 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 21:03:24,308 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-19 21:03:24,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:03:24 BoogieIcfgContainer [2024-11-19 21:03:24,309 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 21:03:24,312 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 21:03:24,312 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 21:03:24,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 21:03:24,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:03:23" (1/3) ... [2024-11-19 21:03:24,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aacee94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:03:24, skipping insertion in model container [2024-11-19 21:03:24,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:03:23" (2/3) ... [2024-11-19 21:03:24,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aacee94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:03:24, skipping insertion in model container [2024-11-19 21:03:24,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:03:24" (3/3) ... [2024-11-19 21:03:24,318 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2024-11-19 21:03:24,334 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 21:03:24,334 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 21:03:24,390 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 21:03:24,397 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;@6a748c63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 21:03:24,398 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 21:03:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-19 21:03:24,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:24,407 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:24,407 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:24,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:24,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2024-11-19 21:03:24,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:24,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834009655] [2024-11-19 21:03:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:24,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:03:24,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:24,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834009655] [2024-11-19 21:03:24,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834009655] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:03:24,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:03:24,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 21:03:24,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631717695] [2024-11-19 21:03:24,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:03:24,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 21:03:24,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 21:03:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 21:03:24,578 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:24,591 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2024-11-19 21:03:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 21:03:24,593 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2024-11-19 21:03:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:24,600 INFO L225 Difference]: With dead ends: 31 [2024-11-19 21:03:24,601 INFO L226 Difference]: Without dead ends: 13 [2024-11-19 21:03:24,603 INFO L431 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 [2024-11-19 21:03:24,608 INFO L432 NwaCegarLoop]: 22 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, 22 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 [2024-11-19 21:03:24,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:03:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-19 21:03:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-19 21:03:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2024-11-19 21:03:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2024-11-19 21:03:24,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2024-11-19 21:03:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:24,634 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2024-11-19 21:03:24,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2024-11-19 21:03:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-19 21:03:24,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:24,635 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:24,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 21:03:24,636 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:24,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2024-11-19 21:03:24,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:24,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536525962] [2024-11-19 21:03:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:24,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:03:24,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:24,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536525962] [2024-11-19 21:03:24,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536525962] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:03:24,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:03:24,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 21:03:24,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278442335] [2024-11-19 21:03:24,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:03:24,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 21:03:24,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:24,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 21:03:24,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 21:03:24,859 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:24,894 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2024-11-19 21:03:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 21:03:24,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2024-11-19 21:03:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:24,895 INFO L225 Difference]: With dead ends: 27 [2024-11-19 21:03:24,895 INFO L226 Difference]: Without dead ends: 18 [2024-11-19 21:03:24,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 21:03:24,897 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:24,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:03:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-19 21:03:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-19 21:03:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2024-11-19 21:03:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2024-11-19 21:03:24,903 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 12 [2024-11-19 21:03:24,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:24,903 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2024-11-19 21:03:24,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:24,904 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2024-11-19 21:03:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 21:03:24,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:24,904 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:24,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 21:03:24,904 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:24,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:24,905 INFO L85 PathProgramCache]: Analyzing trace with hash 415981709, now seen corresponding path program 1 times [2024-11-19 21:03:24,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:24,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648124322] [2024-11-19 21:03:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:24,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:03:24,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648124322] [2024-11-19 21:03:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648124322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:03:24,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:03:24,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 21:03:24,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692606088] [2024-11-19 21:03:24,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:03:24,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 21:03:24,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 21:03:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 21:03:24,938 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:24,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:24,959 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2024-11-19 21:03:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 21:03:24,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2024-11-19 21:03:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:24,961 INFO L225 Difference]: With dead ends: 41 [2024-11-19 21:03:24,961 INFO L226 Difference]: Without dead ends: 28 [2024-11-19 21:03:24,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 21:03:24,963 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:24,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 23 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:03:24,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-19 21:03:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-19 21:03:24,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 41 transitions. [2024-11-19 21:03:24,973 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 41 transitions. Word has length 13 [2024-11-19 21:03:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:24,973 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 41 transitions. [2024-11-19 21:03:24,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2024-11-19 21:03:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 21:03:24,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:24,975 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:24,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 21:03:24,975 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:24,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:24,975 INFO L85 PathProgramCache]: Analyzing trace with hash 461234238, now seen corresponding path program 1 times [2024-11-19 21:03:24,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:24,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344947883] [2024-11-19 21:03:24,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:24,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:03:25,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:25,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344947883] [2024-11-19 21:03:25,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344947883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:03:25,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:03:25,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 21:03:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588657106] [2024-11-19 21:03:25,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:03:25,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 21:03:25,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:25,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 21:03:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 21:03:25,057 INFO L87 Difference]: Start difference. First operand 28 states and 41 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:25,102 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2024-11-19 21:03:25,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 21:03:25,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2024-11-19 21:03:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:25,103 INFO L225 Difference]: With dead ends: 43 [2024-11-19 21:03:25,103 INFO L226 Difference]: Without dead ends: 32 [2024-11-19 21:03:25,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 21:03:25,104 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:25,104 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:03:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-19 21:03:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-19 21:03:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 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) [2024-11-19 21:03:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2024-11-19 21:03:25,115 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 13 [2024-11-19 21:03:25,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:25,115 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2024-11-19 21:03:25,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:25,115 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2024-11-19 21:03:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-19 21:03:25,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:25,117 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:25,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 21:03:25,117 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:25,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:25,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1348188691, now seen corresponding path program 1 times [2024-11-19 21:03:25,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:25,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527340046] [2024-11-19 21:03:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:25,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:25,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:25,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527340046] [2024-11-19 21:03:25,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527340046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 21:03:25,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 21:03:25,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 21:03:25,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915593717] [2024-11-19 21:03:25,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:03:25,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 21:03:25,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 21:03:25,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 21:03:25,205 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:25,246 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2024-11-19 21:03:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 21:03:25,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2024-11-19 21:03:25,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:25,249 INFO L225 Difference]: With dead ends: 41 [2024-11-19 21:03:25,249 INFO L226 Difference]: Without dead ends: 28 [2024-11-19 21:03:25,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 21:03:25,250 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:25,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:03:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-19 21:03:25,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-19 21:03:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2024-11-19 21:03:25,257 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2024-11-19 21:03:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:25,259 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2024-11-19 21:03:25,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:25,259 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2024-11-19 21:03:25,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-19 21:03:25,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:25,259 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:25,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 21:03:25,260 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:25,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:25,260 INFO L85 PathProgramCache]: Analyzing trace with hash 121782348, now seen corresponding path program 1 times [2024-11-19 21:03:25,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:25,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137938309] [2024-11-19 21:03:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:25,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:25,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:25,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137938309] [2024-11-19 21:03:25,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137938309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:25,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092763785] [2024-11-19 21:03:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:25,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:25,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:25,329 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) [2024-11-19 21:03:25,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 21:03:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:25,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 21:03:25,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:25,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:25,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092763785] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:25,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 21:03:25,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-11-19 21:03:25,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897032266] [2024-11-19 21:03:25,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 21:03:25,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 21:03:25,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:25,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 21:03:25,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-19 21:03:25,445 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:25,468 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2024-11-19 21:03:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 21:03:25,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2024-11-19 21:03:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:25,469 INFO L225 Difference]: With dead ends: 35 [2024-11-19 21:03:25,472 INFO L226 Difference]: Without dead ends: 25 [2024-11-19 21:03:25,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-19 21:03:25,473 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:25,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:03:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-19 21:03:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-19 21:03:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2024-11-19 21:03:25,480 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 15 [2024-11-19 21:03:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:25,480 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2024-11-19 21:03:25,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2024-11-19 21:03:25,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-19 21:03:25,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:25,481 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:25,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:25,681 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 [2024-11-19 21:03:25,682 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:25,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:25,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1019268824, now seen corresponding path program 1 times [2024-11-19 21:03:25,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:25,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627307158] [2024-11-19 21:03:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:25,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 21:03:25,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:25,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627307158] [2024-11-19 21:03:25,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627307158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:25,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262085310] [2024-11-19 21:03:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:25,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:25,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:25,766 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) [2024-11-19 21:03:25,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 21:03:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:25,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 21:03:25,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:03:25,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 21:03:25,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262085310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:25,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:25,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2024-11-19 21:03:25,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76598809] [2024-11-19 21:03:25,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:25,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 21:03:25,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:25,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 21:03:25,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-11-19 21:03:25,893 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:26,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:26,016 INFO L93 Difference]: Finished difference Result 90 states and 143 transitions. [2024-11-19 21:03:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 21:03:26,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2024-11-19 21:03:26,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:26,018 INFO L225 Difference]: With dead ends: 90 [2024-11-19 21:03:26,018 INFO L226 Difference]: Without dead ends: 73 [2024-11-19 21:03:26,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2024-11-19 21:03:26,019 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:26,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 80 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:03:26,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-19 21:03:26,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2024-11-19 21:03:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2024-11-19 21:03:26,029 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 16 [2024-11-19 21:03:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:26,030 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2024-11-19 21:03:26,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2024-11-19 21:03:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-19 21:03:26,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:26,030 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:26,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 21:03:26,234 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 [2024-11-19 21:03:26,234 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:26,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1475655800, now seen corresponding path program 1 times [2024-11-19 21:03:26,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:26,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717543876] [2024-11-19 21:03:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:26,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:26,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:26,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717543876] [2024-11-19 21:03:26,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717543876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:26,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635919698] [2024-11-19 21:03:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:26,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:26,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:26,285 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) [2024-11-19 21:03:26,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 21:03:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:26,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 21:03:26,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 21:03:26,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 21:03:26,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635919698] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:26,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:26,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-19 21:03:26,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729336630] [2024-11-19 21:03:26,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:26,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 21:03:26,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 21:03:26,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:03:26,360 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2024-11-19 21:03:26,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:26,444 INFO L93 Difference]: Finished difference Result 169 states and 259 transitions. [2024-11-19 21:03:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 21:03:26,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) Word has length 16 [2024-11-19 21:03:26,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:26,445 INFO L225 Difference]: With dead ends: 169 [2024-11-19 21:03:26,446 INFO L226 Difference]: Without dead ends: 146 [2024-11-19 21:03:26,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-19 21:03:26,446 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:26,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 53 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:03:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-19 21:03:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 83. [2024-11-19 21:03:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.5) internal successors, (123), 82 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 123 transitions. [2024-11-19 21:03:26,463 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 123 transitions. Word has length 16 [2024-11-19 21:03:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:26,463 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 123 transitions. [2024-11-19 21:03:26,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2024-11-19 21:03:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 123 transitions. [2024-11-19 21:03:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-19 21:03:26,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:26,464 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:26,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 21:03:26,664 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 [2024-11-19 21:03:26,665 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:26,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:26,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2038983293, now seen corresponding path program 1 times [2024-11-19 21:03:26,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:26,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281613304] [2024-11-19 21:03:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:26,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:26,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281613304] [2024-11-19 21:03:26,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281613304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900001689] [2024-11-19 21:03:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:26,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:26,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:26,727 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) [2024-11-19 21:03:26,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 21:03:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:26,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 21:03:26,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:26,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:26,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900001689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:26,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:26,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-11-19 21:03:26,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125603430] [2024-11-19 21:03:26,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:26,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 21:03:26,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:26,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 21:03:26,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-19 21:03:26,814 INFO L87 Difference]: Start difference. First operand 83 states and 123 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2024-11-19 21:03:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:27,015 INFO L93 Difference]: Finished difference Result 157 states and 234 transitions. [2024-11-19 21:03:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 21:03:27,016 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 17 [2024-11-19 21:03:27,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:27,017 INFO L225 Difference]: With dead ends: 157 [2024-11-19 21:03:27,017 INFO L226 Difference]: Without dead ends: 123 [2024-11-19 21:03:27,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:03:27,018 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:27,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 54 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:03:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-19 21:03:27,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 102. [2024-11-19 21:03:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 101 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 146 transitions. [2024-11-19 21:03:27,037 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 146 transitions. Word has length 17 [2024-11-19 21:03:27,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:27,037 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 146 transitions. [2024-11-19 21:03:27,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2024-11-19 21:03:27,037 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 146 transitions. [2024-11-19 21:03:27,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-19 21:03:27,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:27,038 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:27,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:27,242 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 [2024-11-19 21:03:27,243 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:27,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2024-11-19 21:03:27,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:27,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140559605] [2024-11-19 21:03:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:27,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:27,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:27,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140559605] [2024-11-19 21:03:27,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140559605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:27,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666951678] [2024-11-19 21:03:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:27,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:27,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:27,335 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) [2024-11-19 21:03:27,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 21:03:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:27,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 21:03:27,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:27,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:27,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666951678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:27,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:27,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-19 21:03:27,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233609973] [2024-11-19 21:03:27,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:27,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 21:03:27,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 21:03:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:03:27,441 INFO L87 Difference]: Start difference. First operand 102 states and 146 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2024-11-19 21:03:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:27,502 INFO L93 Difference]: Finished difference Result 131 states and 188 transitions. [2024-11-19 21:03:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 21:03:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) Word has length 18 [2024-11-19 21:03:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:27,503 INFO L225 Difference]: With dead ends: 131 [2024-11-19 21:03:27,503 INFO L226 Difference]: Without dead ends: 116 [2024-11-19 21:03:27,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 21:03:27,504 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:27,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 21:03:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-19 21:03:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2024-11-19 21:03:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.4948453608247423) internal successors, (145), 97 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 145 transitions. [2024-11-19 21:03:27,521 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 145 transitions. Word has length 18 [2024-11-19 21:03:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:27,521 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 145 transitions. [2024-11-19 21:03:27,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2024-11-19 21:03:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 145 transitions. [2024-11-19 21:03:27,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-19 21:03:27,522 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:27,522 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:27,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:27,726 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 [2024-11-19 21:03:27,727 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:27,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash 91906733, now seen corresponding path program 2 times [2024-11-19 21:03:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:27,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189007482] [2024-11-19 21:03:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 21:03:27,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189007482] [2024-11-19 21:03:27,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189007482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:27,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258292670] [2024-11-19 21:03:27,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:03:27,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:27,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:27,786 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) [2024-11-19 21:03:27,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 21:03:27,814 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:03:27,815 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:27,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 21:03:27,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 21:03:27,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 21:03:27,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258292670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:27,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:27,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-19 21:03:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329086795] [2024-11-19 21:03:27,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:27,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 21:03:27,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 21:03:27,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-19 21:03:27,887 INFO L87 Difference]: Start difference. First operand 98 states and 145 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:28,004 INFO L93 Difference]: Finished difference Result 138 states and 205 transitions. [2024-11-19 21:03:28,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 21:03:28,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2024-11-19 21:03:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:28,005 INFO L225 Difference]: With dead ends: 138 [2024-11-19 21:03:28,005 INFO L226 Difference]: Without dead ends: 93 [2024-11-19 21:03:28,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-19 21:03:28,006 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:28,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 79 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:03:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-19 21:03:28,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2024-11-19 21:03:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4761904761904763) internal successors, (124), 84 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 124 transitions. [2024-11-19 21:03:28,020 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 124 transitions. Word has length 19 [2024-11-19 21:03:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:28,020 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 124 transitions. [2024-11-19 21:03:28,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 124 transitions. [2024-11-19 21:03:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-19 21:03:28,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:28,021 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:28,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 21:03:28,222 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 [2024-11-19 21:03:28,222 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:28,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:28,222 INFO L85 PathProgramCache]: Analyzing trace with hash -139194169, now seen corresponding path program 3 times [2024-11-19 21:03:28,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:28,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756808693] [2024-11-19 21:03:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:28,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:28,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756808693] [2024-11-19 21:03:28,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756808693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957385064] [2024-11-19 21:03:28,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 21:03:28,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:28,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:28,322 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:28,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 21:03:28,357 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 21:03:28,357 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:28,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 21:03:28,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 21:03:28,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 21:03:28,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957385064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:28,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:28,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2024-11-19 21:03:28,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577990472] [2024-11-19 21:03:28,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:28,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 21:03:28,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:28,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 21:03:28,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-19 21:03:28,516 INFO L87 Difference]: Start difference. First operand 85 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:28,827 INFO L93 Difference]: Finished difference Result 140 states and 206 transitions. [2024-11-19 21:03:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 21:03:28,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 20 [2024-11-19 21:03:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:28,828 INFO L225 Difference]: With dead ends: 140 [2024-11-19 21:03:28,828 INFO L226 Difference]: Without dead ends: 85 [2024-11-19 21:03:28,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-11-19 21:03:28,829 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:28,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 130 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 21:03:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-19 21:03:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2024-11-19 21:03:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 73 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 105 transitions. [2024-11-19 21:03:28,846 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 105 transitions. Word has length 20 [2024-11-19 21:03:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:28,846 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 105 transitions. [2024-11-19 21:03:28,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 105 transitions. [2024-11-19 21:03:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-19 21:03:28,847 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:28,847 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:28,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 21:03:29,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:29,052 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:29,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:29,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1948553864, now seen corresponding path program 4 times [2024-11-19 21:03:29,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:29,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092257416] [2024-11-19 21:03:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:29,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 21:03:29,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092257416] [2024-11-19 21:03:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092257416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170451714] [2024-11-19 21:03:29,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 21:03:29,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:29,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:29,151 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:29,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 21:03:29,181 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 21:03:29,181 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:29,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 21:03:29,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 21:03:29,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 21:03:29,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170451714] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:29,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:29,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 17 [2024-11-19 21:03:29,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143685273] [2024-11-19 21:03:29,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:29,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 21:03:29,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:29,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 21:03:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-11-19 21:03:29,323 INFO L87 Difference]: Start difference. First operand 74 states and 105 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:29,707 INFO L93 Difference]: Finished difference Result 168 states and 254 transitions. [2024-11-19 21:03:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-19 21:03:29,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2024-11-19 21:03:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:29,708 INFO L225 Difference]: With dead ends: 168 [2024-11-19 21:03:29,709 INFO L226 Difference]: Without dead ends: 134 [2024-11-19 21:03:29,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2024-11-19 21:03:29,710 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:29,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 131 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 21:03:29,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-19 21:03:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 103. [2024-11-19 21:03:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.4411764705882353) internal successors, (147), 102 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 147 transitions. [2024-11-19 21:03:29,763 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 147 transitions. Word has length 22 [2024-11-19 21:03:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:29,763 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 147 transitions. [2024-11-19 21:03:29,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 147 transitions. [2024-11-19 21:03:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-19 21:03:29,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:29,764 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:29,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 21:03:29,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 21:03:29,965 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:29,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:29,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1316100797, now seen corresponding path program 5 times [2024-11-19 21:03:29,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:29,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880837622] [2024-11-19 21:03:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:29,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:30,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880837622] [2024-11-19 21:03:30,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880837622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:30,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821791499] [2024-11-19 21:03:30,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 21:03:30,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:30,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:30,140 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:30,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 21:03:30,182 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 21:03:30,182 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:30,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 21:03:30,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 21:03:30,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 21:03:30,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821791499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:30,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:30,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-11-19 21:03:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346066824] [2024-11-19 21:03:30,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:30,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 21:03:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 21:03:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2024-11-19 21:03:30,477 INFO L87 Difference]: Start difference. First operand 103 states and 147 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2024-11-19 21:03:31,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:31,698 INFO L93 Difference]: Finished difference Result 205 states and 313 transitions. [2024-11-19 21:03:31,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-19 21:03:31,699 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) Word has length 23 [2024-11-19 21:03:31,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:31,699 INFO L225 Difference]: With dead ends: 205 [2024-11-19 21:03:31,700 INFO L226 Difference]: Without dead ends: 161 [2024-11-19 21:03:31,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=825, Invalid=3465, Unknown=0, NotChecked=0, Total=4290 [2024-11-19 21:03:31,701 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:31,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 202 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 21:03:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-19 21:03:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 108. [2024-11-19 21:03:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.3738317757009346) internal successors, (147), 107 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 147 transitions. [2024-11-19 21:03:31,719 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 147 transitions. Word has length 23 [2024-11-19 21:03:31,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:31,719 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 147 transitions. [2024-11-19 21:03:31,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2024-11-19 21:03:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 147 transitions. [2024-11-19 21:03:31,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-19 21:03:31,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:31,720 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:31,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:31,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 21:03:31,925 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:31,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:31,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1491919202, now seen corresponding path program 1 times [2024-11-19 21:03:31,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:31,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139134892] [2024-11-19 21:03:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:31,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 21:03:32,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:32,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139134892] [2024-11-19 21:03:32,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139134892] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:32,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332808844] [2024-11-19 21:03:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:32,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:32,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:32,014 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:32,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 21:03:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:32,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 21:03:32,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 21:03:32,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-19 21:03:32,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332808844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:32,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:32,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 8] total 20 [2024-11-19 21:03:32,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026361113] [2024-11-19 21:03:32,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:32,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 21:03:32,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:32,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 21:03:32,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2024-11-19 21:03:32,214 INFO L87 Difference]: Start difference. First operand 108 states and 147 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) [2024-11-19 21:03:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:32,779 INFO L93 Difference]: Finished difference Result 218 states and 320 transitions. [2024-11-19 21:03:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-19 21:03:32,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) Word has length 23 [2024-11-19 21:03:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:32,780 INFO L225 Difference]: With dead ends: 218 [2024-11-19 21:03:32,780 INFO L226 Difference]: Without dead ends: 169 [2024-11-19 21:03:32,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2024-11-19 21:03:32,781 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:32,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 170 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 21:03:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-19 21:03:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2024-11-19 21:03:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.3795620437956204) internal successors, (189), 137 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 189 transitions. [2024-11-19 21:03:32,804 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 189 transitions. Word has length 23 [2024-11-19 21:03:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:32,804 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 189 transitions. [2024-11-19 21:03:32,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) [2024-11-19 21:03:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 189 transitions. [2024-11-19 21:03:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-19 21:03:32,805 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:32,805 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:32,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 21:03:33,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 21:03:33,005 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:33,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash 257480285, now seen corresponding path program 2 times [2024-11-19 21:03:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:33,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927104243] [2024-11-19 21:03:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 21:03:33,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:33,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927104243] [2024-11-19 21:03:33,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927104243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:33,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132367621] [2024-11-19 21:03:33,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:03:33,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:33,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:33,091 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:33,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 21:03:33,120 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:03:33,120 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:33,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-19 21:03:33,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:03:33,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 21:03:33,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132367621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:33,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:33,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 18 [2024-11-19 21:03:33,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236317351] [2024-11-19 21:03:33,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:33,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 21:03:33,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 21:03:33,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-19 21:03:33,260 INFO L87 Difference]: Start difference. First operand 138 states and 189 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:33,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:33,498 INFO L93 Difference]: Finished difference Result 328 states and 487 transitions. [2024-11-19 21:03:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 21:03:33,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 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 23 [2024-11-19 21:03:33,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:33,499 INFO L225 Difference]: With dead ends: 328 [2024-11-19 21:03:33,499 INFO L226 Difference]: Without dead ends: 261 [2024-11-19 21:03:33,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:03:33,500 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 95 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:33,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 184 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 21:03:33,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-19 21:03:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 189. [2024-11-19 21:03:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.372340425531915) internal successors, (258), 188 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 258 transitions. [2024-11-19 21:03:33,531 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 258 transitions. Word has length 23 [2024-11-19 21:03:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:33,531 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 258 transitions. [2024-11-19 21:03:33,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:33,531 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 258 transitions. [2024-11-19 21:03:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-19 21:03:33,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:33,532 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:33,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:33,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 21:03:33,736 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:33,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:33,736 INFO L85 PathProgramCache]: Analyzing trace with hash -235040834, now seen corresponding path program 2 times [2024-11-19 21:03:33,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:33,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740924604] [2024-11-19 21:03:33,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:33,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 21:03:33,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:33,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740924604] [2024-11-19 21:03:33,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740924604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:33,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182925503] [2024-11-19 21:03:33,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:03:33,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:33,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:33,875 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:33,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 21:03:33,908 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:03:33,908 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:33,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 21:03:33,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-19 21:03:33,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-19 21:03:34,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182925503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:34,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:34,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 23 [2024-11-19 21:03:34,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771464352] [2024-11-19 21:03:34,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:34,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 21:03:34,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:34,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 21:03:34,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-11-19 21:03:34,095 INFO L87 Difference]: Start difference. First operand 189 states and 258 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:35,488 INFO L93 Difference]: Finished difference Result 676 states and 994 transitions. [2024-11-19 21:03:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-19 21:03:35,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 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 25 [2024-11-19 21:03:35,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:35,491 INFO L225 Difference]: With dead ends: 676 [2024-11-19 21:03:35,491 INFO L226 Difference]: Without dead ends: 580 [2024-11-19 21:03:35,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=912, Invalid=3644, Unknown=0, NotChecked=0, Total=4556 [2024-11-19 21:03:35,492 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 210 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:35,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 188 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 21:03:35,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2024-11-19 21:03:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 220. [2024-11-19 21:03:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.360730593607306) internal successors, (298), 219 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 298 transitions. [2024-11-19 21:03:35,539 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 298 transitions. Word has length 25 [2024-11-19 21:03:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:35,540 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 298 transitions. [2024-11-19 21:03:35,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 298 transitions. [2024-11-19 21:03:35,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-19 21:03:35,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:35,540 INFO L215 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:35,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:35,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 21:03:35,741 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:35,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:35,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1802339079, now seen corresponding path program 2 times [2024-11-19 21:03:35,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:35,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745804869] [2024-11-19 21:03:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:35,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 21:03:35,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:35,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745804869] [2024-11-19 21:03:35,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745804869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:35,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85249672] [2024-11-19 21:03:35,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:03:35,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:35,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:35,880 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:35,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 21:03:35,921 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:03:35,921 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:35,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 21:03:35,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 21:03:35,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-19 21:03:35,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85249672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:35,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:35,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 5] total 15 [2024-11-19 21:03:35,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341239251] [2024-11-19 21:03:35,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:35,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 21:03:35,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:35,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 21:03:35,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-19 21:03:35,989 INFO L87 Difference]: Start difference. First operand 220 states and 298 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:36,345 INFO L93 Difference]: Finished difference Result 508 states and 749 transitions. [2024-11-19 21:03:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 21:03:36,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 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 26 [2024-11-19 21:03:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:36,347 INFO L225 Difference]: With dead ends: 508 [2024-11-19 21:03:36,347 INFO L226 Difference]: Without dead ends: 445 [2024-11-19 21:03:36,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2024-11-19 21:03:36,348 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 73 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:36,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 292 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 21:03:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2024-11-19 21:03:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 276. [2024-11-19 21:03:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.3636363636363635) internal successors, (375), 275 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 375 transitions. [2024-11-19 21:03:36,424 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 375 transitions. Word has length 26 [2024-11-19 21:03:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:36,424 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 375 transitions. [2024-11-19 21:03:36,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 375 transitions. [2024-11-19 21:03:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-19 21:03:36,425 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:36,425 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:36,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:36,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 21:03:36,626 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:36,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:36,626 INFO L85 PathProgramCache]: Analyzing trace with hash -404039911, now seen corresponding path program 6 times [2024-11-19 21:03:36,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:36,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868710546] [2024-11-19 21:03:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:36,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-19 21:03:36,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:36,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868710546] [2024-11-19 21:03:36,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868710546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:36,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093641104] [2024-11-19 21:03:36,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 21:03:36,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:36,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:36,736 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:36,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 21:03:36,773 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 21:03:36,774 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:36,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 21:03:36,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-19 21:03:36,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 21:03:36,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093641104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:36,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:36,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 20 [2024-11-19 21:03:36,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962721795] [2024-11-19 21:03:36,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:36,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 21:03:36,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:36,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 21:03:36,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-11-19 21:03:36,909 INFO L87 Difference]: Start difference. First operand 276 states and 375 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:37,378 INFO L93 Difference]: Finished difference Result 365 states and 491 transitions. [2024-11-19 21:03:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 21:03:37,378 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 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 28 [2024-11-19 21:03:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:37,380 INFO L225 Difference]: With dead ends: 365 [2024-11-19 21:03:37,380 INFO L226 Difference]: Without dead ends: 299 [2024-11-19 21:03:37,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2024-11-19 21:03:37,380 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 51 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:37,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 286 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 21:03:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-19 21:03:37,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 260. [2024-11-19 21:03:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.3667953667953667) internal successors, (354), 259 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 354 transitions. [2024-11-19 21:03:37,441 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 354 transitions. Word has length 28 [2024-11-19 21:03:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:37,441 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 354 transitions. [2024-11-19 21:03:37,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:37,441 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 354 transitions. [2024-11-19 21:03:37,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 21:03:37,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:37,442 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:37,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:37,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:37,643 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:37,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash -20997379, now seen corresponding path program 7 times [2024-11-19 21:03:37,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:37,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818259499] [2024-11-19 21:03:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:37,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:37,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:37,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818259499] [2024-11-19 21:03:37,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818259499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:37,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145570008] [2024-11-19 21:03:37,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 21:03:37,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:37,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:37,802 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:37,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 21:03:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:37,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 21:03:37,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-19 21:03:37,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-19 21:03:38,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145570008] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:38,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:38,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2024-11-19 21:03:38,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469338974] [2024-11-19 21:03:38,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:38,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 21:03:38,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:38,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 21:03:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-11-19 21:03:38,066 INFO L87 Difference]: Start difference. First operand 260 states and 354 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:39,436 INFO L93 Difference]: Finished difference Result 591 states and 909 transitions. [2024-11-19 21:03:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-19 21:03:39,436 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 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 29 [2024-11-19 21:03:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:39,438 INFO L225 Difference]: With dead ends: 591 [2024-11-19 21:03:39,438 INFO L226 Difference]: Without dead ends: 510 [2024-11-19 21:03:39,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=941, Invalid=3751, Unknown=0, NotChecked=0, Total=4692 [2024-11-19 21:03:39,440 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 211 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:39,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 285 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1454 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 21:03:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2024-11-19 21:03:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 354. [2024-11-19 21:03:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.3597733711048159) internal successors, (480), 353 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 480 transitions. [2024-11-19 21:03:39,561 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 480 transitions. Word has length 29 [2024-11-19 21:03:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:39,562 INFO L471 AbstractCegarLoop]: Abstraction has 354 states and 480 transitions. [2024-11-19 21:03:39,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 480 transitions. [2024-11-19 21:03:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 21:03:39,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:39,563 INFO L215 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:39,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:39,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:39,764 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:39,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1268860428, now seen corresponding path program 3 times [2024-11-19 21:03:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:39,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630514955] [2024-11-19 21:03:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:39,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 21:03:39,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:39,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630514955] [2024-11-19 21:03:39,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630514955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:39,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571257840] [2024-11-19 21:03:39,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 21:03:39,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:39,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:39,953 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:39,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 21:03:39,987 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 21:03:39,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:39,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 21:03:39,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-19 21:03:40,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-19 21:03:40,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571257840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:40,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:40,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 24 [2024-11-19 21:03:40,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909277019] [2024-11-19 21:03:40,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:40,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 21:03:40,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:40,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 21:03:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2024-11-19 21:03:40,201 INFO L87 Difference]: Start difference. First operand 354 states and 480 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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) [2024-11-19 21:03:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:41,121 INFO L93 Difference]: Finished difference Result 691 states and 985 transitions. [2024-11-19 21:03:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-19 21:03:41,124 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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 29 [2024-11-19 21:03:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:41,126 INFO L225 Difference]: With dead ends: 691 [2024-11-19 21:03:41,126 INFO L226 Difference]: Without dead ends: 535 [2024-11-19 21:03:41,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2024-11-19 21:03:41,127 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 205 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:41,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 360 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 21:03:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2024-11-19 21:03:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 386. [2024-11-19 21:03:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.3688311688311687) internal successors, (527), 385 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 527 transitions. [2024-11-19 21:03:41,303 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 527 transitions. Word has length 29 [2024-11-19 21:03:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:41,307 INFO L471 AbstractCegarLoop]: Abstraction has 386 states and 527 transitions. [2024-11-19 21:03:41,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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) [2024-11-19 21:03:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 527 transitions. [2024-11-19 21:03:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 21:03:41,309 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:41,309 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:41,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-19 21:03:41,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:41,509 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:41,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 3 times [2024-11-19 21:03:41,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:41,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725815087] [2024-11-19 21:03:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:41,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 21:03:41,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:41,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725815087] [2024-11-19 21:03:41,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725815087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:41,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941601177] [2024-11-19 21:03:41,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 21:03:41,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:41,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:41,697 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:41,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 21:03:41,740 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 21:03:41,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:41,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 21:03:41,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 21:03:41,773 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 21:03:41,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941601177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:41,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:41,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-11-19 21:03:41,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828951574] [2024-11-19 21:03:41,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:41,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 21:03:41,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:41,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 21:03:41,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-19 21:03:41,813 INFO L87 Difference]: Start difference. First operand 386 states and 527 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:42,093 INFO L93 Difference]: Finished difference Result 533 states and 714 transitions. [2024-11-19 21:03:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 21:03:42,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 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 30 [2024-11-19 21:03:42,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:42,096 INFO L225 Difference]: With dead ends: 533 [2024-11-19 21:03:42,096 INFO L226 Difference]: Without dead ends: 508 [2024-11-19 21:03:42,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-19 21:03:42,098 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:42,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 104 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:03:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2024-11-19 21:03:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 393. [2024-11-19 21:03:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.3954081632653061) internal successors, (547), 392 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 547 transitions. [2024-11-19 21:03:42,253 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 547 transitions. Word has length 30 [2024-11-19 21:03:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:42,253 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 547 transitions. [2024-11-19 21:03:42,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 547 transitions. [2024-11-19 21:03:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-19 21:03:42,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:42,253 INFO L215 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:42,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:42,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:42,458 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:42,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1872604873, now seen corresponding path program 4 times [2024-11-19 21:03:42,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:42,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060059115] [2024-11-19 21:03:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 21:03:42,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:42,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060059115] [2024-11-19 21:03:42,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060059115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:42,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945024828] [2024-11-19 21:03:42,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 21:03:42,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:42,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:42,622 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:42,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 21:03:42,675 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 21:03:42,675 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:42,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 21:03:42,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 21:03:42,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-19 21:03:42,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945024828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:42,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:42,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 6] total 19 [2024-11-19 21:03:42,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469077437] [2024-11-19 21:03:42,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:42,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 21:03:42,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:42,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 21:03:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-19 21:03:42,774 INFO L87 Difference]: Start difference. First operand 393 states and 547 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:43,454 INFO L93 Difference]: Finished difference Result 867 states and 1264 transitions. [2024-11-19 21:03:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-19 21:03:43,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 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 32 [2024-11-19 21:03:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:43,460 INFO L225 Difference]: With dead ends: 867 [2024-11-19 21:03:43,460 INFO L226 Difference]: Without dead ends: 731 [2024-11-19 21:03:43,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2024-11-19 21:03:43,461 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 167 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:43,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 428 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 21:03:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2024-11-19 21:03:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 460. [2024-11-19 21:03:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.3725490196078431) internal successors, (630), 459 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 630 transitions. [2024-11-19 21:03:43,625 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 630 transitions. Word has length 32 [2024-11-19 21:03:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:43,625 INFO L471 AbstractCegarLoop]: Abstraction has 460 states and 630 transitions. [2024-11-19 21:03:43,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 630 transitions. [2024-11-19 21:03:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-19 21:03:43,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:43,626 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:43,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:43,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:43,826 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:43,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:43,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2140726323, now seen corresponding path program 4 times [2024-11-19 21:03:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:43,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585307605] [2024-11-19 21:03:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:43,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-19 21:03:44,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:44,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585307605] [2024-11-19 21:03:44,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585307605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:44,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379731144] [2024-11-19 21:03:44,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 21:03:44,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:44,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:44,097 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:44,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 21:03:44,138 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 21:03:44,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:44,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 21:03:44,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-19 21:03:44,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-19 21:03:44,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379731144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:44,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:44,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2024-11-19 21:03:44,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052853997] [2024-11-19 21:03:44,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:44,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 21:03:44,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:44,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 21:03:44,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:03:44,430 INFO L87 Difference]: Start difference. First operand 460 states and 630 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:48,327 INFO L93 Difference]: Finished difference Result 1069 states and 1416 transitions. [2024-11-19 21:03:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2024-11-19 21:03:48,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 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 33 [2024-11-19 21:03:48,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:48,331 INFO L225 Difference]: With dead ends: 1069 [2024-11-19 21:03:48,331 INFO L226 Difference]: Without dead ends: 962 [2024-11-19 21:03:48,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 58 SyntacticMatches, 10 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8816 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1591, Invalid=21971, Unknown=0, NotChecked=0, Total=23562 [2024-11-19 21:03:48,336 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 248 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:48,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 366 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-19 21:03:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2024-11-19 21:03:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 504. [2024-11-19 21:03:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.3538767395626243) internal successors, (681), 503 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 681 transitions. [2024-11-19 21:03:48,547 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 681 transitions. Word has length 33 [2024-11-19 21:03:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:48,547 INFO L471 AbstractCegarLoop]: Abstraction has 504 states and 681 transitions. [2024-11-19 21:03:48,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 681 transitions. [2024-11-19 21:03:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-19 21:03:48,548 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:48,548 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:48,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-19 21:03:48,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:48,752 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:48,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:48,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1627323367, now seen corresponding path program 5 times [2024-11-19 21:03:48,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:48,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230054665] [2024-11-19 21:03:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:48,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:48,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:48,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230054665] [2024-11-19 21:03:48,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230054665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:48,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674205012] [2024-11-19 21:03:48,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 21:03:48,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:48,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:48,975 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:48,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 21:03:49,077 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 21:03:49,078 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:49,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-19 21:03:49,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:03:49,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-19 21:03:49,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674205012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:49,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:49,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 15] total 39 [2024-11-19 21:03:49,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446337054] [2024-11-19 21:03:49,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:49,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-19 21:03:49,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:49,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-19 21:03:49,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2024-11-19 21:03:49,552 INFO L87 Difference]: Start difference. First operand 504 states and 681 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:51,737 INFO L93 Difference]: Finished difference Result 823 states and 1164 transitions. [2024-11-19 21:03:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-19 21:03:51,738 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 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 34 [2024-11-19 21:03:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:51,740 INFO L225 Difference]: With dead ends: 823 [2024-11-19 21:03:51,745 INFO L226 Difference]: Without dead ends: 721 [2024-11-19 21:03:51,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1960, Invalid=6970, Unknown=0, NotChecked=0, Total=8930 [2024-11-19 21:03:51,747 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 168 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:51,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 355 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 21:03:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2024-11-19 21:03:51,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 559. [2024-11-19 21:03:51,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.3476702508960574) internal successors, (752), 558 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 752 transitions. [2024-11-19 21:03:51,993 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 752 transitions. Word has length 34 [2024-11-19 21:03:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:51,993 INFO L471 AbstractCegarLoop]: Abstraction has 559 states and 752 transitions. [2024-11-19 21:03:51,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 752 transitions. [2024-11-19 21:03:51,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-19 21:03:51,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:51,994 INFO L215 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:52,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-19 21:03:52,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-19 21:03:52,198 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:52,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1934378598, now seen corresponding path program 6 times [2024-11-19 21:03:52,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:52,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376898387] [2024-11-19 21:03:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:52,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-19 21:03:52,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:52,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376898387] [2024-11-19 21:03:52,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376898387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:52,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440847238] [2024-11-19 21:03:52,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 21:03:52,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:52,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:52,454 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:52,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 21:03:52,512 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-19 21:03:52,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:52,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 21:03:52,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-19 21:03:52,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-19 21:03:52,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440847238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:52,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:52,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 20 [2024-11-19 21:03:52,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253369973] [2024-11-19 21:03:52,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:52,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 21:03:52,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 21:03:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-11-19 21:03:52,764 INFO L87 Difference]: Start difference. First operand 559 states and 752 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) [2024-11-19 21:03:53,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:53,781 INFO L93 Difference]: Finished difference Result 1151 states and 1633 transitions. [2024-11-19 21:03:53,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-19 21:03:53,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) Word has length 34 [2024-11-19 21:03:53,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:53,785 INFO L225 Difference]: With dead ends: 1151 [2024-11-19 21:03:53,785 INFO L226 Difference]: Without dead ends: 935 [2024-11-19 21:03:53,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=987, Unknown=0, NotChecked=0, Total=1332 [2024-11-19 21:03:53,786 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 134 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:53,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 610 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 21:03:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2024-11-19 21:03:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 591. [2024-11-19 21:03:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.3542372881355933) internal successors, (799), 590 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 799 transitions. [2024-11-19 21:03:54,057 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 799 transitions. Word has length 34 [2024-11-19 21:03:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:54,057 INFO L471 AbstractCegarLoop]: Abstraction has 591 states and 799 transitions. [2024-11-19 21:03:54,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 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) [2024-11-19 21:03:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 799 transitions. [2024-11-19 21:03:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-19 21:03:54,058 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:54,058 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:54,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:54,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-19 21:03:54,262 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:54,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:54,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 7 times [2024-11-19 21:03:54,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:54,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117460377] [2024-11-19 21:03:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:54,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-19 21:03:54,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:54,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117460377] [2024-11-19 21:03:54,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117460377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:54,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031162081] [2024-11-19 21:03:54,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 21:03:54,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:54,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:54,451 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:54,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-19 21:03:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:54,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-19 21:03:54,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-19 21:03:54,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-19 21:03:54,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031162081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:54,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:54,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-19 21:03:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126996597] [2024-11-19 21:03:54,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:54,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 21:03:54,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:54,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 21:03:54,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-19 21:03:54,657 INFO L87 Difference]: Start difference. First operand 591 states and 799 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:55,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:03:55,235 INFO L93 Difference]: Finished difference Result 813 states and 1065 transitions. [2024-11-19 21:03:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 21:03:55,236 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 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 36 [2024-11-19 21:03:55,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:03:55,238 INFO L225 Difference]: With dead ends: 813 [2024-11-19 21:03:55,238 INFO L226 Difference]: Without dead ends: 783 [2024-11-19 21:03:55,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 18 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-19 21:03:55,239 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:03:55,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 155 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:03:55,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2024-11-19 21:03:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 598. [2024-11-19 21:03:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.3634840871021776) internal successors, (814), 597 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 814 transitions. [2024-11-19 21:03:55,534 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 814 transitions. Word has length 36 [2024-11-19 21:03:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:03:55,534 INFO L471 AbstractCegarLoop]: Abstraction has 598 states and 814 transitions. [2024-11-19 21:03:55,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:03:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 814 transitions. [2024-11-19 21:03:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-19 21:03:55,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:03:55,535 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:03:55,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-19 21:03:55,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-19 21:03:55,736 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:03:55,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:03:55,736 INFO L85 PathProgramCache]: Analyzing trace with hash -922807928, now seen corresponding path program 8 times [2024-11-19 21:03:55,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:03:55,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798977339] [2024-11-19 21:03:55,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:03:55,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:03:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:03:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-19 21:03:55,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:03:55,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798977339] [2024-11-19 21:03:55,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798977339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:03:55,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339958470] [2024-11-19 21:03:55,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 21:03:55,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:03:55,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:03:55,939 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:03:55,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-19 21:03:55,992 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 21:03:55,993 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:03:55,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 21:03:55,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:03:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 21:03:56,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:03:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 21:03:56,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339958470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:03:56,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:03:56,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2024-11-19 21:03:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930506642] [2024-11-19 21:03:56,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:03:56,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 21:03:56,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:03:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 21:03:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-19 21:03:56,184 INFO L87 Difference]: Start difference. First operand 598 states and 814 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:01,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-19 21:04:05,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-19 21:04:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:04:05,491 INFO L93 Difference]: Finished difference Result 1257 states and 1675 transitions. [2024-11-19 21:04:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-19 21:04:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 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 36 [2024-11-19 21:04:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:04:05,495 INFO L225 Difference]: With dead ends: 1257 [2024-11-19 21:04:05,495 INFO L226 Difference]: Without dead ends: 1139 [2024-11-19 21:04:05,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 57 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2024-11-19 21:04:05,495 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 87 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 88 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-11-19 21:04:05,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 236 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 317 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2024-11-19 21:04:05,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2024-11-19 21:04:05,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 722. [2024-11-19 21:04:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.332871012482663) internal successors, (961), 721 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 961 transitions. [2024-11-19 21:04:05,845 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 961 transitions. Word has length 36 [2024-11-19 21:04:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:04:05,845 INFO L471 AbstractCegarLoop]: Abstraction has 722 states and 961 transitions. [2024-11-19 21:04:05,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 961 transitions. [2024-11-19 21:04:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-19 21:04:05,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:04:05,846 INFO L215 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:04:05,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-19 21:04:06,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:06,047 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:04:06,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:04:06,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1987186775, now seen corresponding path program 9 times [2024-11-19 21:04:06,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:04:06,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596825611] [2024-11-19 21:04:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:04:06,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:04:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:04:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-19 21:04:06,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:04:06,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596825611] [2024-11-19 21:04:06,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596825611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:04:06,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649335620] [2024-11-19 21:04:06,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 21:04:06,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:06,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:04:06,226 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:04:06,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-19 21:04:06,267 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 21:04:06,267 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:04:06,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 21:04:06,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:04:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-19 21:04:06,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:04:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-19 21:04:06,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649335620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:04:06,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:04:06,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 21 [2024-11-19 21:04:06,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461117765] [2024-11-19 21:04:06,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:04:06,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 21:04:06,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:04:06,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 21:04:06,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:04:06,446 INFO L87 Difference]: Start difference. First operand 722 states and 961 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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) [2024-11-19 21:04:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:04:07,652 INFO L93 Difference]: Finished difference Result 1462 states and 2056 transitions. [2024-11-19 21:04:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-19 21:04:07,652 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 36 [2024-11-19 21:04:07,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:04:07,656 INFO L225 Difference]: With dead ends: 1462 [2024-11-19 21:04:07,656 INFO L226 Difference]: Without dead ends: 1179 [2024-11-19 21:04:07,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=1105, Unknown=0, NotChecked=0, Total=1482 [2024-11-19 21:04:07,657 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 239 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 21:04:07,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 543 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 21:04:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2024-11-19 21:04:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 693. [2024-11-19 21:04:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.3511560693641618) internal successors, (935), 692 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 935 transitions. [2024-11-19 21:04:08,023 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 935 transitions. Word has length 36 [2024-11-19 21:04:08,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:04:08,023 INFO L471 AbstractCegarLoop]: Abstraction has 693 states and 935 transitions. [2024-11-19 21:04:08,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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) [2024-11-19 21:04:08,023 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 935 transitions. [2024-11-19 21:04:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-19 21:04:08,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:04:08,024 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:04:08,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-19 21:04:08,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-19 21:04:08,228 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:04:08,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:04:08,229 INFO L85 PathProgramCache]: Analyzing trace with hash -513863587, now seen corresponding path program 10 times [2024-11-19 21:04:08,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:04:08,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844149443] [2024-11-19 21:04:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:04:08,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:04:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:04:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 21:04:08,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:04:08,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844149443] [2024-11-19 21:04:08,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844149443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:04:08,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509377988] [2024-11-19 21:04:08,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 21:04:08,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:08,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:04:08,471 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:04:08,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-19 21:04:08,522 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 21:04:08,523 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:04:08,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 21:04:08,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:04:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-19 21:04:08,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:04:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-19 21:04:09,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509377988] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:04:09,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:04:09,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2024-11-19 21:04:09,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860920974] [2024-11-19 21:04:09,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:04:09,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 21:04:09,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:04:09,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 21:04:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2024-11-19 21:04:09,072 INFO L87 Difference]: Start difference. First operand 693 states and 935 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:21,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:04:21,181 INFO L93 Difference]: Finished difference Result 1640 states and 2182 transitions. [2024-11-19 21:04:21,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2024-11-19 21:04:21,182 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 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 37 [2024-11-19 21:04:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:04:21,186 INFO L225 Difference]: With dead ends: 1640 [2024-11-19 21:04:21,186 INFO L226 Difference]: Without dead ends: 1470 [2024-11-19 21:04:21,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 64 SyntacticMatches, 14 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36489 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=4735, Invalid=81995, Unknown=0, NotChecked=0, Total=86730 [2024-11-19 21:04:21,191 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 422 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 3857 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 4427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 3857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-19 21:04:21,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 265 Invalid, 4427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 3857 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-19 21:04:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2024-11-19 21:04:21,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 688. [2024-11-19 21:04:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.3377001455604076) internal successors, (919), 687 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 919 transitions. [2024-11-19 21:04:21,613 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 919 transitions. Word has length 37 [2024-11-19 21:04:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:04:21,613 INFO L471 AbstractCegarLoop]: Abstraction has 688 states and 919 transitions. [2024-11-19 21:04:21,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 919 transitions. [2024-11-19 21:04:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-19 21:04:21,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:04:21,615 INFO L215 NwaCegarLoop]: trace histogram [11, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:04:21,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-19 21:04:21,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:21,815 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:04:21,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:04:21,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1305632020, now seen corresponding path program 5 times [2024-11-19 21:04:21,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:04:21,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86994926] [2024-11-19 21:04:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:04:21,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:04:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:04:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 21:04:22,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:04:22,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86994926] [2024-11-19 21:04:22,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86994926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:04:22,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136220242] [2024-11-19 21:04:22,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 21:04:22,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:22,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:04:22,028 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:04:22,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-19 21:04:22,093 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-19 21:04:22,094 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:04:22,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-19 21:04:22,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:04:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-19 21:04:22,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:04:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-19 21:04:22,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136220242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:04:22,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:04:22,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 13] total 38 [2024-11-19 21:04:22,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9548029] [2024-11-19 21:04:22,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:04:22,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 21:04:22,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:04:22,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 21:04:22,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 21:04:22,546 INFO L87 Difference]: Start difference. First operand 688 states and 919 transitions. Second operand has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:04:24,976 INFO L93 Difference]: Finished difference Result 1308 states and 1811 transitions. [2024-11-19 21:04:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-19 21:04:24,979 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 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 37 [2024-11-19 21:04:24,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:04:24,982 INFO L225 Difference]: With dead ends: 1308 [2024-11-19 21:04:24,982 INFO L226 Difference]: Without dead ends: 993 [2024-11-19 21:04:24,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1156, Invalid=5650, Unknown=0, NotChecked=0, Total=6806 [2024-11-19 21:04:24,984 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 297 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 2123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-19 21:04:24,984 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 803 Invalid, 2123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-19 21:04:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2024-11-19 21:04:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 768. [2024-11-19 21:04:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 1.318122555410691) internal successors, (1011), 767 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1011 transitions. [2024-11-19 21:04:25,446 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1011 transitions. Word has length 37 [2024-11-19 21:04:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:04:25,446 INFO L471 AbstractCegarLoop]: Abstraction has 768 states and 1011 transitions. [2024-11-19 21:04:25,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1011 transitions. [2024-11-19 21:04:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-19 21:04:25,447 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:04:25,447 INFO L215 NwaCegarLoop]: trace histogram [10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:04:25,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-19 21:04:25,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-19 21:04:25,651 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:04:25,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:04:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash -118662530, now seen corresponding path program 3 times [2024-11-19 21:04:25,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:04:25,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165620295] [2024-11-19 21:04:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:04:25,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:04:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:04:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-19 21:04:25,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:04:25,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165620295] [2024-11-19 21:04:25,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165620295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:04:25,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769987780] [2024-11-19 21:04:25,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 21:04:25,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:25,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:04:25,924 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:04:25,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-19 21:04:25,998 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-19 21:04:25,998 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:04:25,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 21:04:25,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:04:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-19 21:04:26,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:04:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-19 21:04:26,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769987780] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:04:26,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:04:26,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 38 [2024-11-19 21:04:26,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116852503] [2024-11-19 21:04:26,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:04:26,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 21:04:26,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:04:26,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 21:04:26,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 21:04:26,435 INFO L87 Difference]: Start difference. First operand 768 states and 1011 transitions. Second operand has 38 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 38 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:04:31,129 INFO L93 Difference]: Finished difference Result 1693 states and 2396 transitions. [2024-11-19 21:04:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-11-19 21:04:31,129 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 38 states have internal predecessors, (63), 0 states have call successors, (0), 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 39 [2024-11-19 21:04:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:04:31,134 INFO L225 Difference]: With dead ends: 1693 [2024-11-19 21:04:31,135 INFO L226 Difference]: Without dead ends: 1524 [2024-11-19 21:04:31,136 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5308 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3314, Invalid=14776, Unknown=0, NotChecked=0, Total=18090 [2024-11-19 21:04:31,136 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 458 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 3814 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 4176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 3814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-19 21:04:31,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 765 Invalid, 4176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 3814 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-19 21:04:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2024-11-19 21:04:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 920. [2024-11-19 21:04:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 1.3220892274211098) internal successors, (1215), 919 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1215 transitions. [2024-11-19 21:04:31,731 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1215 transitions. Word has length 39 [2024-11-19 21:04:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:04:31,732 INFO L471 AbstractCegarLoop]: Abstraction has 920 states and 1215 transitions. [2024-11-19 21:04:31,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 38 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1215 transitions. [2024-11-19 21:04:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-19 21:04:31,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:04:31,733 INFO L215 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:04:31,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-19 21:04:31,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:31,933 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:04:31,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:04:31,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1598515239, now seen corresponding path program 6 times [2024-11-19 21:04:31,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:04:31,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994533417] [2024-11-19 21:04:31,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:04:31,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:04:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:04:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-19 21:04:32,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:04:32,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994533417] [2024-11-19 21:04:32,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994533417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:04:32,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000378967] [2024-11-19 21:04:32,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 21:04:32,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:32,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:04:32,165 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:04:32,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-19 21:04:32,221 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-19 21:04:32,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:04:32,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 21:04:32,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:04:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-19 21:04:32,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:04:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-19 21:04:32,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000378967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:04:32,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:04:32,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 27 [2024-11-19 21:04:32,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126513899] [2024-11-19 21:04:32,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:04:32,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 21:04:32,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:04:32,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 21:04:32,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-11-19 21:04:32,578 INFO L87 Difference]: Start difference. First operand 920 states and 1215 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:34,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:04:34,524 INFO L93 Difference]: Finished difference Result 1787 states and 2478 transitions. [2024-11-19 21:04:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-19 21:04:34,524 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 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 40 [2024-11-19 21:04:34,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:04:34,529 INFO L225 Difference]: With dead ends: 1787 [2024-11-19 21:04:34,529 INFO L226 Difference]: Without dead ends: 1427 [2024-11-19 21:04:34,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 69 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=708, Invalid=2484, Unknown=0, NotChecked=0, Total=3192 [2024-11-19 21:04:34,530 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 342 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 21:04:34,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 864 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 21:04:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2024-11-19 21:04:35,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 969. [2024-11-19 21:04:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 1.3326446280991735) internal successors, (1290), 968 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1290 transitions. [2024-11-19 21:04:35,289 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1290 transitions. Word has length 40 [2024-11-19 21:04:35,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:04:35,289 INFO L471 AbstractCegarLoop]: Abstraction has 969 states and 1290 transitions. [2024-11-19 21:04:35,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1290 transitions. [2024-11-19 21:04:35,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 21:04:35,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:04:35,290 INFO L215 NwaCegarLoop]: trace histogram [13, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:04:35,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-19 21:04:35,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:35,491 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:04:35,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:04:35,491 INFO L85 PathProgramCache]: Analyzing trace with hash -803486290, now seen corresponding path program 11 times [2024-11-19 21:04:35,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:04:35,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593955545] [2024-11-19 21:04:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:04:35,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:04:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:04:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-19 21:04:35,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:04:35,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593955545] [2024-11-19 21:04:35,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593955545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:04:35,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531329162] [2024-11-19 21:04:35,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 21:04:35,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:35,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:04:35,735 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:04:35,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-19 21:04:35,872 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-19 21:04:35,872 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:04:35,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-19 21:04:35,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:04:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-19 21:04:35,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:04:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-11-19 21:04:36,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531329162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:04:36,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:04:36,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 6] total 24 [2024-11-19 21:04:36,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531409401] [2024-11-19 21:04:36,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:04:36,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 21:04:36,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:04:36,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 21:04:36,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2024-11-19 21:04:36,006 INFO L87 Difference]: Start difference. First operand 969 states and 1290 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:37,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:04:37,559 INFO L93 Difference]: Finished difference Result 1675 states and 2306 transitions. [2024-11-19 21:04:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-19 21:04:37,559 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 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 [2024-11-19 21:04:37,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:04:37,563 INFO L225 Difference]: With dead ends: 1675 [2024-11-19 21:04:37,563 INFO L226 Difference]: Without dead ends: 1280 [2024-11-19 21:04:37,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2024-11-19 21:04:37,564 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 99 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 21:04:37,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1117 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 21:04:37,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2024-11-19 21:04:38,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1045. [2024-11-19 21:04:38,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 1.3256704980842913) internal successors, (1384), 1044 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:38,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1384 transitions. [2024-11-19 21:04:38,262 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1384 transitions. Word has length 41 [2024-11-19 21:04:38,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:04:38,262 INFO L471 AbstractCegarLoop]: Abstraction has 1045 states and 1384 transitions. [2024-11-19 21:04:38,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:38,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1384 transitions. [2024-11-19 21:04:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-19 21:04:38,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:04:38,263 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:04:38,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-19 21:04:38,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:38,468 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:04:38,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:04:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2041166362, now seen corresponding path program 12 times [2024-11-19 21:04:38,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:04:38,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092195977] [2024-11-19 21:04:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:04:38,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:04:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:04:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-19 21:04:38,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:04:38,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092195977] [2024-11-19 21:04:38,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092195977] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:04:38,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855868179] [2024-11-19 21:04:38,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 21:04:38,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:38,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:04:38,728 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:04:38,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-19 21:04:38,775 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 21:04:38,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 21:04:38,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-19 21:04:38,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:04:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-19 21:04:38,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:04:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-19 21:04:39,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855868179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:04:39,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:04:39,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2024-11-19 21:04:39,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779690997] [2024-11-19 21:04:39,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:04:39,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 21:04:39,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:04:39,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 21:04:39,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-19 21:04:39,007 INFO L87 Difference]: Start difference. First operand 1045 states and 1384 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 21:04:40,661 INFO L93 Difference]: Finished difference Result 1667 states and 2146 transitions. [2024-11-19 21:04:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 21:04:40,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 42 [2024-11-19 21:04:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 21:04:40,667 INFO L225 Difference]: With dead ends: 1667 [2024-11-19 21:04:40,667 INFO L226 Difference]: Without dead ends: 1434 [2024-11-19 21:04:40,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 23 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-19 21:04:40,668 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 21:04:40,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 215 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 21:04:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2024-11-19 21:04:41,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1013. [2024-11-19 21:04:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.3310276679841897) internal successors, (1347), 1012 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1347 transitions. [2024-11-19 21:04:41,389 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1347 transitions. Word has length 42 [2024-11-19 21:04:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 21:04:41,389 INFO L471 AbstractCegarLoop]: Abstraction has 1013 states and 1347 transitions. [2024-11-19 21:04:41,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1347 transitions. [2024-11-19 21:04:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-19 21:04:41,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 21:04:41,391 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 21:04:41,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-19 21:04:41,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-19 21:04:41,591 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 21:04:41,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 21:04:41,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1591776935, now seen corresponding path program 13 times [2024-11-19 21:04:41,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 21:04:41,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426799948] [2024-11-19 21:04:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 21:04:41,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 21:04:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:04:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-19 21:04:42,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 21:04:42,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426799948] [2024-11-19 21:04:42,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426799948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 21:04:42,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854833601] [2024-11-19 21:04:42,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 21:04:42,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 21:04:42,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 21:04:42,028 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 21:04:42,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-19 21:04:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 21:04:42,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 21:04:42,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 21:04:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-19 21:04:42,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 21:04:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-19 21:04:42,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854833601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 21:04:42,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 21:04:42,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2024-11-19 21:04:42,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180686952] [2024-11-19 21:04:42,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 21:04:42,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 21:04:42,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 21:04:42,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 21:04:42,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2024-11-19 21:04:42,336 INFO L87 Difference]: Start difference. First operand 1013 states and 1347 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 21:04:46,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-19 21:04:55,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-19 21:05:04,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []