/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 --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.trace.refinement.strategy FOX -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-17387ad-m
[2024-11-06 09:10:45,073 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-06 09:10:45,139 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf
[2024-11-06 09:10:45,148 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-06 09:10:45,149 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-06 09:10:45,174 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-06 09:10:45,175 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-06 09:10:45,175 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-06 09:10:45,176 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-11-06 09:10:45,176 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-11-06 09:10:45,177 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-06 09:10:45,177 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-06 09:10:45,177 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-06 09:10:45,178 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-06 09:10:45,178 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-11-06 09:10:45,178 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-06 09:10:45,179 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-06 09:10:45,179 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-11-06 09:10:45,179 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-11-06 09:10:45,180 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-06 09:10:45,180 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-06 09:10:45,180 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-06 09:10:45,181 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-06 09:10:45,181 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-06 09:10:45,181 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-11-06 09:10:45,181 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-06 09:10:45,181 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-11-06 09:10:45,182 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-11-06 09:10:45,182 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-06 09:10:45,182 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-06 09:10:45,182 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-06 09:10:45,183 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-11-06 09:10:45,183 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-06 09:10:45,183 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-06 09:10:45,183 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 09:10:45,184 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-06 09:10:45,184 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-06 09:10:45,184 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-06 09:10:45,184 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-11-06 09:10:45,185 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt
[2024-11-06 09:10:45,185 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-06 09:10:45,185 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-11-06 09:10:45,186 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-11-06 09:10:45,186 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-06 09:10:45,186 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FOX
[2024-11-06 09:10:45,423 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-06 09:10:45,451 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-06 09:10:45,454 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-06 09:10:45,455 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-06 09:10:45,456 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-06 09:10:45,457 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/sum02-2.c
[2024-11-06 09:10:46,960 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-06 09:10:47,142 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-06 09:10:47,142 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/sum02-2.c
[2024-11-06 09:10:47,148 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d31dbe79/2490b64972a84402be03d6ecfe9d8954/FLAGd8614ebdb
[2024-11-06 09:10:47,161 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d31dbe79/2490b64972a84402be03d6ecfe9d8954
[2024-11-06 09:10:47,164 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-06 09:10:47,165 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-11-06 09:10:47,166 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-06 09:10:47,166 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-06 09:10:47,171 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-06 09:10:47,172 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,173 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3001ce3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47, skipping insertion in model container
[2024-11-06 09:10:47,173 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,191 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-06 09:10:47,366 WARN  L250   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]
[2024-11-06 09:10:47,380 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 09:10:47,389 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-06 09:10:47,399 WARN  L250   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]
[2024-11-06 09:10:47,402 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 09:10:47,418 INFO  L204         MainTranslator]: Completed translation
[2024-11-06 09:10:47,418 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47 WrapperNode
[2024-11-06 09:10:47,419 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-06 09:10:47,420 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-06 09:10:47,420 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-06 09:10:47,420 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-06 09:10:47,427 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,434 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,447 INFO  L138                Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 36
[2024-11-06 09:10:47,447 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-06 09:10:47,448 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-06 09:10:47,448 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-06 09:10:47,448 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-06 09:10:47,458 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,458 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,461 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,471 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].
[2024-11-06 09:10:47,472 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,473 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,480 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,483 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,484 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,485 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,487 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-06 09:10:47,492 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-06 09:10:47,492 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-06 09:10:47,492 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-06 09:10:47,493 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (1/1) ...
[2024-11-06 09:10:47,498 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 09:10:47,510 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 09:10:47,526 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)
[2024-11-06 09:10:47,530 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
[2024-11-06 09:10:47,559 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-06 09:10:47,560 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-11-06 09:10:47,560 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-06 09:10:47,560 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-06 09:10:47,634 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-06 09:10:47,638 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-06 09:10:47,854 INFO  L?                        ?]: Removed 12 outVars from TransFormulas that were not future-live.
[2024-11-06 09:10:47,855 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-06 09:10:47,868 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-06 09:10:47,868 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-11-06 09:10:47,869 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:10:47 BoogieIcfgContainer
[2024-11-06 09:10:47,869 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-06 09:10:47,874 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-06 09:10:47,874 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-06 09:10:47,877 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-06 09:10:47,878 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:10:47" (1/3) ...
[2024-11-06 09:10:47,879 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edc7756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:10:47, skipping insertion in model container
[2024-11-06 09:10:47,879 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:47" (2/3) ...
[2024-11-06 09:10:47,879 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edc7756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:10:47, skipping insertion in model container
[2024-11-06 09:10:47,879 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:10:47" (3/3) ...
[2024-11-06 09:10:47,881 INFO  L112   eAbstractionObserver]: Analyzing ICFG sum02-2.c
[2024-11-06 09:10:47,900 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-06 09:10:47,901 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-06 09:10:47,964 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-06 09:10:47,971 INFO  L333      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4bea59a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-06 09:10:47,972 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-06 09:10:47,977 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)
[2024-11-06 09:10:47,983 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2024-11-06 09:10:47,984 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 09:10:48,007 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-06 09:10:48,007 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 09:10:48,016 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 09:10:48,016 INFO  L85        PathProgramCache]: Analyzing trace with hash 119658891, now seen corresponding path program 1 times
[2024-11-06 09:10:48,027 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 09:10:48,028 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988746456]
[2024-11-06 09:10:48,028 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 09:10:48,029 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 09:10:48,029 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 09:10:48,031 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)
[2024-11-06 09:10:48,034 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-11-06 09:10:48,123 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 09:10:48,130 INFO  L255         TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjuncts are in the unsatisfiable core
[2024-11-06 09:10:48,133 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 09:10:48,147 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 09:10:48,147 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 09:10:48,148 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 09:10:48,148 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988746456]
[2024-11-06 09:10:48,149 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [988746456] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 09:10:48,149 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-06 09:10:48,149 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-11-06 09:10:48,151 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794010363]
[2024-11-06 09:10:48,151 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 09:10:48,155 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2024-11-06 09:10:48,156 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 09:10:48,173 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2024-11-06 09:10:48,174 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-11-06 09:10:48,176 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)
[2024-11-06 09:10:48,186 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 09:10:48,186 INFO  L93              Difference]: Finished difference Result 25 states and 30 transitions.
[2024-11-06 09:10:48,187 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-11-06 09:10:48,188 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
[2024-11-06 09:10:48,188 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 09:10:48,194 INFO  L225             Difference]: With dead ends: 25
[2024-11-06 09:10:48,194 INFO  L226             Difference]: Without dead ends: 10
[2024-11-06 09:10:48,196 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-11-06 09:10:48,200 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
[2024-11-06 09:10:48,201 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]
[2024-11-06 09:10:48,216 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2024-11-06 09:10:48,226 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10.
[2024-11-06 09:10:48,227 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)
[2024-11-06 09:10:48,228 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions.
[2024-11-06 09:10:48,229 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8
[2024-11-06 09:10:48,229 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 09:10:48,229 INFO  L471      AbstractCegarLoop]: Abstraction has 10 states and 10 transitions.
[2024-11-06 09:10:48,229 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)
[2024-11-06 09:10:48,230 INFO  L276                IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions.
[2024-11-06 09:10:48,230 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2024-11-06 09:10:48,230 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 09:10:48,230 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-06 09:10:48,255 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2024-11-06 09:10:48,431 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
[2024-11-06 09:10:48,432 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 09:10:48,432 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 09:10:48,432 INFO  L85        PathProgramCache]: Analyzing trace with hash 176738447, now seen corresponding path program 1 times
[2024-11-06 09:10:48,433 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 09:10:48,433 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137716034]
[2024-11-06 09:10:48,433 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 09:10:48,433 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 09:10:48,433 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 09:10:48,435 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)
[2024-11-06 09:10:48,436 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2024-11-06 09:10:48,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 09:10:48,505 INFO  L255         TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjuncts are in the unsatisfiable core
[2024-11-06 09:10:48,508 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 09:10:48,588 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 09:10:48,589 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 09:10:48,589 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 09:10:48,589 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137716034]
[2024-11-06 09:10:48,589 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137716034] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 09:10:48,590 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-06 09:10:48,590 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2024-11-06 09:10:48,590 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660728463]
[2024-11-06 09:10:48,592 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 09:10:48,593 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2024-11-06 09:10:48,593 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 09:10:48,593 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2024-11-06 09:10:48,594 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2024-11-06 09:10:48,594 INFO  L87              Difference]: Start difference. First operand 10 states and 10 transitions. Second operand  has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-06 09:10:48,651 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 09:10:48,652 INFO  L93              Difference]: Finished difference Result 15 states and 15 transitions.
[2024-11-06 09:10:48,652 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-11-06 09:10:48,653 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2024-11-06 09:10:48,653 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 09:10:48,653 INFO  L225             Difference]: With dead ends: 15
[2024-11-06 09:10:48,653 INFO  L226             Difference]: Without dead ends: 11
[2024-11-06 09:10:48,654 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2024-11-06 09:10:48,655 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
[2024-11-06 09:10:48,656 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]
[2024-11-06 09:10:48,656 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11 states.
[2024-11-06 09:10:48,658 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11.
[2024-11-06 09:10:48,659 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)
[2024-11-06 09:10:48,659 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions.
[2024-11-06 09:10:48,660 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8
[2024-11-06 09:10:48,660 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 09:10:48,660 INFO  L471      AbstractCegarLoop]: Abstraction has 11 states and 11 transitions.
[2024-11-06 09:10:48,660 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-06 09:10:48,660 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions.
[2024-11-06 09:10:48,661 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2024-11-06 09:10:48,661 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 09:10:48,661 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-06 09:10:48,679 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2024-11-06 09:10:48,861 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
[2024-11-06 09:10:48,862 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 09:10:48,863 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 09:10:48,863 INFO  L85        PathProgramCache]: Analyzing trace with hash -1899811727, now seen corresponding path program 1 times
[2024-11-06 09:10:48,864 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 09:10:48,864 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038378575]
[2024-11-06 09:10:48,864 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 09:10:48,864 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 09:10:48,864 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 09:10:48,866 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)
[2024-11-06 09:10:48,871 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2024-11-06 09:10:48,942 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 09:10:48,948 INFO  L255         TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 9 conjuncts are in the unsatisfiable core
[2024-11-06 09:10:48,953 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 09:10:49,144 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 09:10:49,144 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 09:10:49,251 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 09:10:49,252 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 09:10:49,252 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038378575]
[2024-11-06 09:10:49,252 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038378575] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-06 09:10:49,252 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-06 09:10:49,252 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9
[2024-11-06 09:10:49,253 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512894470]
[2024-11-06 09:10:49,253 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-06 09:10:49,253 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2024-11-06 09:10:49,253 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 09:10:49,254 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2024-11-06 09:10:49,254 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2024-11-06 09:10:49,254 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)
[2024-11-06 09:10:49,385 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 09:10:49,385 INFO  L93              Difference]: Finished difference Result 17 states and 17 transitions.
[2024-11-06 09:10:49,385 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-11-06 09:10:49,386 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
[2024-11-06 09:10:49,386 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 09:10:49,386 INFO  L225             Difference]: With dead ends: 17
[2024-11-06 09:10:49,386 INFO  L226             Difference]: Without dead ends: 13
[2024-11-06 09:10:49,387 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
[2024-11-06 09:10:49,388 INFO  L432           NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-06 09:10:49,389 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-06 09:10:49,389 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2024-11-06 09:10:49,392 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2024-11-06 09:10:49,392 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)
[2024-11-06 09:10:49,392 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions.
[2024-11-06 09:10:49,392 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10
[2024-11-06 09:10:49,393 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 09:10:49,393 INFO  L471      AbstractCegarLoop]: Abstraction has 13 states and 13 transitions.
[2024-11-06 09:10:49,393 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)
[2024-11-06 09:10:49,393 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions.
[2024-11-06 09:10:49,393 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2024-11-06 09:10:49,394 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 09:10:49,394 INFO  L215           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-06 09:10:49,413 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2024-11-06 09:10:49,594 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
[2024-11-06 09:10:49,595 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 09:10:49,595 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 09:10:49,595 INFO  L85        PathProgramCache]: Analyzing trace with hash -304736301, now seen corresponding path program 2 times
[2024-11-06 09:10:49,596 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 09:10:49,596 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766012003]
[2024-11-06 09:10:49,596 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2024-11-06 09:10:49,596 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 09:10:49,596 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 09:10:49,600 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)
[2024-11-06 09:10:49,601 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2024-11-06 09:10:49,695 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2024-11-06 09:10:49,695 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-06 09:10:49,705 WARN  L253         TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 16 conjuncts are in the unsatisfiable core
[2024-11-06 09:10:49,711 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 09:10:50,073 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 09:10:50,074 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 09:10:55,667 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 09:10:55,667 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 09:10:55,667 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766012003]
[2024-11-06 09:10:55,668 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766012003] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-06 09:10:55,668 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-06 09:10:55,668 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19
[2024-11-06 09:10:55,668 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807088036]
[2024-11-06 09:10:55,668 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-06 09:10:55,669 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2024-11-06 09:10:55,669 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 09:10:55,669 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2024-11-06 09:10:55,670 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342
[2024-11-06 09:10:55,670 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)
[2024-11-06 09:10:59,440 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 09:10:59,441 INFO  L93              Difference]: Finished difference Result 25 states and 27 transitions.
[2024-11-06 09:10:59,441 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2024-11-06 09:10:59,442 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
[2024-11-06 09:10:59,442 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 09:10:59,442 INFO  L225             Difference]: With dead ends: 25
[2024-11-06 09:10:59,442 INFO  L226             Difference]: Without dead ends: 19
[2024-11-06 09:10:59,443 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506
[2024-11-06 09:10:59,444 INFO  L432           NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time
[2024-11-06 09:10:59,444 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time]
[2024-11-06 09:10:59,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2024-11-06 09:10:59,449 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2024-11-06 09:10:59,449 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)
[2024-11-06 09:10:59,449 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions.
[2024-11-06 09:10:59,450 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 12
[2024-11-06 09:10:59,450 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 09:10:59,450 INFO  L471      AbstractCegarLoop]: Abstraction has 19 states and 19 transitions.
[2024-11-06 09:10:59,450 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)
[2024-11-06 09:10:59,450 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions.
[2024-11-06 09:10:59,451 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2024-11-06 09:10:59,451 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 09:10:59,451 INFO  L215           NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-06 09:10:59,472 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2024-11-06 09:10:59,654 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
[2024-11-06 09:10:59,655 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 09:10:59,655 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 09:10:59,655 INFO  L85        PathProgramCache]: Analyzing trace with hash 822048505, now seen corresponding path program 3 times
[2024-11-06 09:10:59,656 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 09:10:59,656 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402627109]
[2024-11-06 09:10:59,656 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2024-11-06 09:10:59,656 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 09:10:59,656 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 09:10:59,657 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)
[2024-11-06 09:10:59,658 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2024-11-06 09:10:59,770 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2024-11-06 09:10:59,771 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-06 09:10:59,778 WARN  L253         TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 22 conjuncts are in the unsatisfiable core
[2024-11-06 09:10:59,784 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 09:11:00,149 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 09:11:00,150 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 09:11:14,817 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 09:11:14,817 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 09:11:14,817 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402627109]
[2024-11-06 09:11:14,817 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402627109] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-06 09:11:14,817 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-06 09:11:14,818 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31
[2024-11-06 09:11:14,818 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112103028]
[2024-11-06 09:11:14,818 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-06 09:11:14,818 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 31 states
[2024-11-06 09:11:14,818 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 09:11:14,819 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants.
[2024-11-06 09:11:14,820 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930
[2024-11-06 09:11:14,820 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)
[2024-11-06 09:11:31,713 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 09:11:31,713 INFO  L93              Difference]: Finished difference Result 37 states and 42 transitions.
[2024-11-06 09:11:31,714 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2024-11-06 09:11:31,714 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
[2024-11-06 09:11:31,714 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 09:11:31,715 INFO  L225             Difference]: With dead ends: 37
[2024-11-06 09:11:31,715 INFO  L226             Difference]: Without dead ends: 31
[2024-11-06 09:11:31,716 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=326, Invalid=1836, Unknown=0, NotChecked=0, Total=2162
[2024-11-06 09:11:31,717 INFO  L432           NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time
[2024-11-06 09:11:31,717 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 55 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time]
[2024-11-06 09:11:31,718 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2024-11-06 09:11:31,723 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2024-11-06 09:11:31,724 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)
[2024-11-06 09:11:31,724 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions.
[2024-11-06 09:11:31,724 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18
[2024-11-06 09:11:31,725 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 09:11:31,725 INFO  L471      AbstractCegarLoop]: Abstraction has 31 states and 31 transitions.
[2024-11-06 09:11:31,725 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)
[2024-11-06 09:11:31,725 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions.
[2024-11-06 09:11:31,726 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2024-11-06 09:11:31,726 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 09:11:31,726 INFO  L215           NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-06 09:11:31,742 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2024-11-06 09:11:31,926 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
[2024-11-06 09:11:31,927 INFO  L396      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 09:11:31,927 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 09:11:31,928 INFO  L85        PathProgramCache]: Analyzing trace with hash -803719227, now seen corresponding path program 4 times
[2024-11-06 09:11:31,928 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 09:11:31,928 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574110615]
[2024-11-06 09:11:31,928 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2024-11-06 09:11:31,928 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 09:11:31,928 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 09:11:31,929 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)
[2024-11-06 09:11:31,930 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2024-11-06 09:11:32,004 INFO  L227   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2024-11-06 09:11:32,005 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-06 09:11:32,015 WARN  L253         TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 35 conjuncts are in the unsatisfiable core
[2024-11-06 09:11:32,017 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 09:11:32,871 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 09:11:32,871 INFO  L311         TraceCheckSpWp]: Computing backward predicates...