/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'z3 -smt2 -in SMTLIB2_COMPLIANT=true' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/sum02-2.c


--------------------------------------------------------------------------------


This is Ultimate 0.2.5-dev-356b6ba-m
[2024-10-31 17:25:24,087 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-10-31 17:25:24,158 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf
[2024-10-31 17:25:24,204 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-10-31 17:25:24,205 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-10-31 17:25:24,208 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-10-31 17:25:24,208 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-10-31 17:25:24,208 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-10-31 17:25:24,209 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-10-31 17:25:24,211 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-10-31 17:25:24,211 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-10-31 17:25:24,212 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-10-31 17:25:24,212 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-10-31 17:25:24,213 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-10-31 17:25:24,213 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-10-31 17:25:24,213 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-10-31 17:25:24,214 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-10-31 17:25:24,214 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-10-31 17:25:24,214 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-10-31 17:25:24,215 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-10-31 17:25:24,215 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-10-31 17:25:24,218 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-10-31 17:25:24,218 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-10-31 17:25:24,219 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-10-31 17:25:24,219 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-10-31 17:25:24,219 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-10-31 17:25:24,220 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-10-31 17:25:24,220 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-10-31 17:25:24,220 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-10-31 17:25:24,220 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-10-31 17:25:24,221 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-10-31 17:25:24,221 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-10-31 17:25:24,222 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-10-31 17:25:24,222 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-10-31 17:25:24,222 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-10-31 17:25:24,223 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt
[2024-10-31 17:25:24,223 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-10-31 17:25:24,223 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-10-31 17:25:24,223 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-10-31 17:25:24,224 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-10-31 17:25:24,224 INFO  L153        SettingsManager]:  * Logic for external solver=AUFBV
[2024-10-31 17:25:24,224 INFO  L153        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 17:25:24,565 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-10-31 17:25:24,587 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-10-31 17:25:24,592 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-10-31 17:25:24,593 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-10-31 17:25:24,593 INFO  L274        PluginConnector]: CDTParser initialized
[2024-10-31 17:25:24,595 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/sum02-2.c
[2024-10-31 17:25:26,086 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-10-31 17:25:26,273 INFO  L384              CDTParser]: Found 1 translation units.
[2024-10-31 17:25:26,273 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/sum02-2.c
[2024-10-31 17:25:26,280 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/567932cef/0af877ada71e497f817b1caa27f9692f/FLAG5bfce5797
[2024-10-31 17:25:26,299 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/567932cef/0af877ada71e497f817b1caa27f9692f
[2024-10-31 17:25:26,301 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-10-31 17:25:26,303 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-10-31 17:25:26,305 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-10-31 17:25:26,305 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-10-31 17:25:26,310 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-10-31 17:25:26,310 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,311 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145f0164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26, skipping insertion in model container
[2024-10-31 17:25:26,312 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,331 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-10-31 17:25:26,503 WARN  L251   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/sum02-2.c[711,724]
[2024-10-31 17:25:26,519 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-10-31 17:25:26,531 INFO  L200         MainTranslator]: Completed pre-run
[2024-10-31 17:25:26,542 WARN  L251   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/sum02-2.c[711,724]
[2024-10-31 17:25:26,548 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-10-31 17:25:26,566 INFO  L204         MainTranslator]: Completed translation
[2024-10-31 17:25:26,568 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26 WrapperNode
[2024-10-31 17:25:26,568 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-10-31 17:25:26,569 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-10-31 17:25:26,570 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-10-31 17:25:26,570 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-10-31 17:25:26,576 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,582 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,599 INFO  L138                Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 36
[2024-10-31 17:25:26,599 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-10-31 17:25:26,600 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-10-31 17:25:26,601 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-10-31 17:25:26,601 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-10-31 17:25:26,610 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,610 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,612 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,628 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].
[2024-10-31 17:25:26,628 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,628 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,634 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,641 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,642 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,645 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,647 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-10-31 17:25:26,647 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-10-31 17:25:26,648 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-10-31 17:25:26,648 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-10-31 17:25:26,649 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (1/1) ...
[2024-10-31 17:25:26,654 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-10-31 17:25:26,665 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-31 17:25:26,676 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)
[2024-10-31 17:25:26,683 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
[2024-10-31 17:25:26,703 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-10-31 17:25:26,703 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-10-31 17:25:26,703 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-10-31 17:25:26,703 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-10-31 17:25:26,760 INFO  L238             CfgBuilder]: Building ICFG
[2024-10-31 17:25:26,762 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-10-31 17:25:26,971 INFO  L?                        ?]: Removed 12 outVars from TransFormulas that were not future-live.
[2024-10-31 17:25:26,972 INFO  L287             CfgBuilder]: Performing block encoding
[2024-10-31 17:25:26,985 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-10-31 17:25:26,986 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-10-31 17:25:26,987 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 05:25:26 BoogieIcfgContainer
[2024-10-31 17:25:26,987 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-10-31 17:25:26,990 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-10-31 17:25:26,991 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-10-31 17:25:26,994 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-10-31 17:25:26,994 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 05:25:26" (1/3) ...
[2024-10-31 17:25:26,996 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b1e69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 05:25:26, skipping insertion in model container
[2024-10-31 17:25:26,996 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 05:25:26" (2/3) ...
[2024-10-31 17:25:26,996 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b1e69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 05:25:26, skipping insertion in model container
[2024-10-31 17:25:26,996 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 05:25:26" (3/3) ...
[2024-10-31 17:25:26,997 INFO  L112   eAbstractionObserver]: Analyzing ICFG sum02-2.c
[2024-10-31 17:25:27,014 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-10-31 17:25:27,014 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-10-31 17:25:27,078 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-10-31 17:25:27,085 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;@784fbe71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-10-31 17:25:27,085 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-10-31 17:25:27,090 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:27,096 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2024-10-31 17:25:27,097 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 17:25:27,098 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 17:25:27,098 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 17:25:27,105 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 17:25:27,105 INFO  L85        PathProgramCache]: Analyzing trace with hash 119658891, now seen corresponding path program 1 times
[2024-10-31 17:25:27,113 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-10-31 17:25:27,114 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462410807]
[2024-10-31 17:25:27,114 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 17:25:27,116 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 17:25:27,116 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-31 17:25:27,118 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)
[2024-10-31 17:25:27,121 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-10-31 17:25:27,220 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 17:25:27,228 INFO  L255         TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjuncts are in the unsatisfiable core
[2024-10-31 17:25:27,232 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 17:25:27,249 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 17:25:27,250 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-31 17:25:27,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 17:25:27,255 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-10-31 17:25:27,256 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462410807]
[2024-10-31 17:25:27,257 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [462410807] provided 2 perfect and 0 imperfect interpolant sequences
[2024-10-31 17:25:27,257 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-10-31 17:25:27,258 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2
[2024-10-31 17:25:27,259 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500317209]
[2024-10-31 17:25:27,260 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-10-31 17:25:27,263 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2024-10-31 17:25:27,264 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-10-31 17:25:27,286 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2024-10-31 17:25:27,286 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-10-31 17:25:27,288 INFO  L87              Difference]: Start difference. First operand  has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:27,300 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 17:25:27,301 INFO  L93              Difference]: Finished difference Result 25 states and 30 transitions.
[2024-10-31 17:25:27,302 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-10-31 17:25:27,303 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2024-10-31 17:25:27,303 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 17:25:27,309 INFO  L225             Difference]: With dead ends: 25
[2024-10-31 17:25:27,310 INFO  L226             Difference]: Without dead ends: 10
[2024-10-31 17:25:27,313 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-10-31 17:25:27,317 INFO  L432           NwaCegarLoop]: 14 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, 14 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
[2024-10-31 17:25:27,318 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-10-31 17:25:27,333 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2024-10-31 17:25:27,342 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10.
[2024-10-31 17:25:27,343 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:27,343 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions.
[2024-10-31 17:25:27,345 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8
[2024-10-31 17:25:27,345 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 17:25:27,346 INFO  L471      AbstractCegarLoop]: Abstraction has 10 states and 10 transitions.
[2024-10-31 17:25:27,346 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:27,346 INFO  L276                IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions.
[2024-10-31 17:25:27,347 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2024-10-31 17:25:27,347 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 17:25:27,347 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 17:25:27,366 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2024-10-31 17:25:27,551 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
[2024-10-31 17:25:27,553 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 17:25:27,553 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 17:25:27,553 INFO  L85        PathProgramCache]: Analyzing trace with hash 176738447, now seen corresponding path program 1 times
[2024-10-31 17:25:27,554 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-10-31 17:25:27,554 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342414307]
[2024-10-31 17:25:27,554 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 17:25:27,554 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 17:25:27,555 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-31 17:25:27,557 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)
[2024-10-31 17:25:27,558 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2024-10-31 17:25:27,653 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 17:25:27,675 INFO  L255         TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjuncts are in the unsatisfiable core
[2024-10-31 17:25:27,678 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 17:25:27,750 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 17:25:27,750 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-31 17:25:27,795 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 17:25:27,795 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-10-31 17:25:27,795 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342414307]
[2024-10-31 17:25:27,795 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1342414307] provided 2 perfect and 0 imperfect interpolant sequences
[2024-10-31 17:25:27,796 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-10-31 17:25:27,796 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5
[2024-10-31 17:25:27,796 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13135022]
[2024-10-31 17:25:27,796 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-10-31 17:25:27,797 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2024-10-31 17:25:27,797 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-10-31 17:25:27,798 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2024-10-31 17:25:27,798 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2024-10-31 17:25:27,799 INFO  L87              Difference]: Start difference. First operand 10 states and 10 transitions. Second operand  has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:27,863 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 17:25:27,864 INFO  L93              Difference]: Finished difference Result 15 states and 15 transitions.
[2024-10-31 17:25:27,864 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-10-31 17:25:27,865 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2024-10-31 17:25:27,865 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 17:25:27,865 INFO  L225             Difference]: With dead ends: 15
[2024-10-31 17:25:27,865 INFO  L226             Difference]: Without dead ends: 11
[2024-10-31 17:25:27,866 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2024-10-31 17:25:27,867 INFO  L432           NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-10-31 17:25:27,867 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-10-31 17:25:27,868 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2024-10-31 17:25:27,870 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2024-10-31 17:25:27,870 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:27,870 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions.
[2024-10-31 17:25:27,871 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8
[2024-10-31 17:25:27,871 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 17:25:27,871 INFO  L471      AbstractCegarLoop]: Abstraction has 11 states and 11 transitions.
[2024-10-31 17:25:27,871 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:27,871 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions.
[2024-10-31 17:25:27,871 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2024-10-31 17:25:27,872 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 17:25:27,872 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 17:25:27,888 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2024-10-31 17:25:28,072 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
[2024-10-31 17:25:28,073 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 17:25:28,073 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 17:25:28,073 INFO  L85        PathProgramCache]: Analyzing trace with hash -1899811727, now seen corresponding path program 1 times
[2024-10-31 17:25:28,074 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-10-31 17:25:28,074 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353516435]
[2024-10-31 17:25:28,074 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 17:25:28,074 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 17:25:28,074 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-31 17:25:28,079 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)
[2024-10-31 17:25:28,080 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2024-10-31 17:25:28,143 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 17:25:28,149 INFO  L255         TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 9 conjuncts are in the unsatisfiable core
[2024-10-31 17:25:28,152 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 17:25:28,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 17:25:28,334 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-31 17:25:28,435 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 17:25:28,435 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-10-31 17:25:28,435 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353516435]
[2024-10-31 17:25:28,438 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [353516435] provided 0 perfect and 2 imperfect interpolant sequences
[2024-10-31 17:25:28,438 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-10-31 17:25:28,438 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9
[2024-10-31 17:25:28,438 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729517131]
[2024-10-31 17:25:28,439 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-10-31 17:25:28,439 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2024-10-31 17:25:28,441 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-10-31 17:25:28,442 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2024-10-31 17:25:28,442 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2024-10-31 17:25:28,442 INFO  L87              Difference]: Start difference. First operand 11 states and 11 transitions. Second operand  has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:28,553 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 17:25:28,554 INFO  L93              Difference]: Finished difference Result 17 states and 17 transitions.
[2024-10-31 17:25:28,554 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-10-31 17:25:28,555 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10
[2024-10-31 17:25:28,555 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 17:25:28,555 INFO  L225             Difference]: With dead ends: 17
[2024-10-31 17:25:28,555 INFO  L226             Difference]: Without dead ends: 13
[2024-10-31 17:25:28,556 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2024-10-31 17:25:28,557 INFO  L432           NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-10-31 17:25:28,557 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-10-31 17:25:28,558 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2024-10-31 17:25:28,563 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2024-10-31 17:25:28,563 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 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)
[2024-10-31 17:25:28,564 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions.
[2024-10-31 17:25:28,564 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10
[2024-10-31 17:25:28,564 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 17:25:28,564 INFO  L471      AbstractCegarLoop]: Abstraction has 13 states and 13 transitions.
[2024-10-31 17:25:28,564 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:28,565 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions.
[2024-10-31 17:25:28,565 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2024-10-31 17:25:28,565 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 17:25:28,565 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 17:25:28,579 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2024-10-31 17:25:28,765 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 17:25:28,766 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 17:25:28,767 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 17:25:28,767 INFO  L85        PathProgramCache]: Analyzing trace with hash -304736301, now seen corresponding path program 2 times
[2024-10-31 17:25:28,767 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-10-31 17:25:28,767 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260288397]
[2024-10-31 17:25:28,767 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 17:25:28,767 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 17:25:28,768 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-31 17:25:28,769 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)
[2024-10-31 17:25:28,771 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2024-10-31 17:25:28,839 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 17:25:28,847 WARN  L253         TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 16 conjuncts are in the unsatisfiable core
[2024-10-31 17:25:28,850 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 17:25:29,157 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 17:25:29,157 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-31 17:25:34,263 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 17:25:34,264 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-10-31 17:25:34,264 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260288397]
[2024-10-31 17:25:34,264 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1260288397] provided 0 perfect and 2 imperfect interpolant sequences
[2024-10-31 17:25:34,264 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-10-31 17:25:34,264 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19
[2024-10-31 17:25:34,265 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843849095]
[2024-10-31 17:25:34,265 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-10-31 17:25:34,265 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2024-10-31 17:25:34,265 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-10-31 17:25:34,266 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2024-10-31 17:25:34,267 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342
[2024-10-31 17:25:34,267 INFO  L87              Difference]: Start difference. First operand 13 states and 13 transitions. Second operand  has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:37,583 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 17:25:37,584 INFO  L93              Difference]: Finished difference Result 25 states and 27 transitions.
[2024-10-31 17:25:37,584 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2024-10-31 17:25:37,585 INFO  L78                 Accepts]: Start accepts. Automaton has  has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 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
[2024-10-31 17:25:37,585 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 17:25:37,585 INFO  L225             Difference]: With dead ends: 25
[2024-10-31 17:25:37,585 INFO  L226             Difference]: Without dead ends: 19
[2024-10-31 17:25:37,586 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506
[2024-10-31 17:25:37,587 INFO  L432           NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2024-10-31 17:25:37,587 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2024-10-31 17:25:37,590 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2024-10-31 17:25:37,593 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2024-10-31 17:25:37,594 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:37,595 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions.
[2024-10-31 17:25:37,595 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 12
[2024-10-31 17:25:37,595 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 17:25:37,595 INFO  L471      AbstractCegarLoop]: Abstraction has 19 states and 19 transitions.
[2024-10-31 17:25:37,596 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:25:37,596 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions.
[2024-10-31 17:25:37,596 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2024-10-31 17:25:37,597 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 17:25:37,597 INFO  L215           NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 17:25:37,618 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2024-10-31 17:25:37,798 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 17:25:37,798 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 17:25:37,799 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 17:25:37,799 INFO  L85        PathProgramCache]: Analyzing trace with hash 822048505, now seen corresponding path program 3 times
[2024-10-31 17:25:37,799 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-10-31 17:25:37,799 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943978727]
[2024-10-31 17:25:37,799 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 17:25:37,800 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 17:25:37,800 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-31 17:25:37,802 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)
[2024-10-31 17:25:37,806 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2024-10-31 17:25:37,886 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 17:25:37,893 WARN  L253         TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 22 conjuncts are in the unsatisfiable core
[2024-10-31 17:25:37,901 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 17:25:38,405 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 17:25:38,406 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-31 17:25:53,029 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 17:25:53,029 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-10-31 17:25:53,030 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943978727]
[2024-10-31 17:25:53,030 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1943978727] provided 0 perfect and 2 imperfect interpolant sequences
[2024-10-31 17:25:53,030 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-10-31 17:25:53,030 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31
[2024-10-31 17:25:53,030 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080385889]
[2024-10-31 17:25:53,030 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-10-31 17:25:53,030 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2024-10-31 17:25:53,030 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-10-31 17:25:53,031 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2024-10-31 17:25:53,032 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930
[2024-10-31 17:25:53,032 INFO  L87              Difference]: Start difference. First operand 19 states and 19 transitions. Second operand  has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:26:13,933 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 17:26:13,933 INFO  L93              Difference]: Finished difference Result 37 states and 42 transitions.
[2024-10-31 17:26:13,934 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2024-10-31 17:26:13,934 INFO  L78                 Accepts]: Start accepts. Automaton has  has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 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
[2024-10-31 17:26:13,934 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 17:26:13,935 INFO  L225             Difference]: With dead ends: 37
[2024-10-31 17:26:13,935 INFO  L226             Difference]: Without dead ends: 31
[2024-10-31 17:26:13,936 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=326, Invalid=1836, Unknown=0, NotChecked=0, Total=2162
[2024-10-31 17:26:13,937 INFO  L432           NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time
[2024-10-31 17:26:13,937 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time]
[2024-10-31 17:26:13,938 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2024-10-31 17:26:13,943 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2024-10-31 17:26:13,944 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:26:13,944 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions.
[2024-10-31 17:26:13,944 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18
[2024-10-31 17:26:13,944 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 17:26:13,945 INFO  L471      AbstractCegarLoop]: Abstraction has 31 states and 31 transitions.
[2024-10-31 17:26:13,945 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-31 17:26:13,945 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions.
[2024-10-31 17:26:13,946 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2024-10-31 17:26:13,946 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 17:26:13,946 INFO  L215           NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 17:26:13,962 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2024-10-31 17:26:14,149 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
[2024-10-31 17:26:14,149 INFO  L396      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 17:26:14,150 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 17:26:14,150 INFO  L85        PathProgramCache]: Analyzing trace with hash -803719227, now seen corresponding path program 4 times
[2024-10-31 17:26:14,150 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-10-31 17:26:14,150 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684442655]
[2024-10-31 17:26:14,150 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 17:26:14,150 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-31 17:26:14,151 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-31 17:26:14,152 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)
[2024-10-31 17:26:14,153 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2024-10-31 17:26:14,225 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 17:26:14,232 WARN  L253         TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 35 conjuncts are in the unsatisfiable core
[2024-10-31 17:26:14,235 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 17:26:15,635 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 17:26:15,635 INFO  L311         TraceCheckSpWp]: Computing backward predicates...