/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-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w8_d128_e0.c


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


This is Ultimate 0.2.5-dev-17387ad-m
[2024-11-06 15:22:26,696 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-06 15:22:26,762 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2024-11-06 15:22:26,770 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-06 15:22:26,771 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-06 15:22:26,798 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-06 15:22:26,798 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-06 15:22:26,799 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-06 15:22:26,799 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-11-06 15:22:26,800 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-11-06 15:22:26,800 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-06 15:22:26,800 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-06 15:22:26,801 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-06 15:22:26,802 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-06 15:22:26,802 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-11-06 15:22:26,803 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-06 15:22:26,804 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-06 15:22:26,804 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-06 15:22:26,805 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-06 15:22:26,805 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-06 15:22:26,805 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-06 15:22:26,807 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-06 15:22:26,807 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-11-06 15:22:26,807 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-06 15:22:26,807 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-11-06 15:22:26,807 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-06 15:22:26,808 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-06 15:22:26,808 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-06 15:22:26,808 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-11-06 15:22:26,809 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-06 15:22:26,809 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-06 15:22:26,809 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 15:22:26,809 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-06 15:22:26,809 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-06 15:22:26,809 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-06 15:22:26,810 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-11-06 15:22:26,810 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2024-11-06 15:22:26,810 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-06 15:22:26,810 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-11-06 15:22:26,810 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-11-06 15:22:26,810 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-06 15:22:26,811 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FOX
[2024-11-06 15:22:27,041 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-06 15:22:27,061 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-06 15:22:27,065 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-06 15:22:27,066 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-06 15:22:27,066 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-06 15:22:27,067 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w8_d128_e0.c
[2024-11-06 15:22:28,528 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-06 15:22:28,902 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-06 15:22:28,903 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w8_d128_e0.c
[2024-11-06 15:22:28,929 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b3d7fdac/68c79b303f2b462fb69254335aa474d1/FLAG69b5f6295
[2024-11-06 15:22:28,949 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b3d7fdac/68c79b303f2b462fb69254335aa474d1
[2024-11-06 15:22:28,956 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-06 15:22:28,961 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-11-06 15:22:28,963 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-06 15:22:28,963 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-06 15:22:28,969 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-06 15:22:28,970 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:22:28" (1/1) ...
[2024-11-06 15:22:28,971 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ae3f87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:28, skipping insertion in model container
[2024-11-06 15:22:28,971 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:22:28" (1/1) ...
[2024-11-06 15:22:29,071 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-06 15:22:29,326 WARN  L250   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w8_d128_e0.c[1280,1293]
[2024-11-06 15:22:29,819 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 15:22:29,831 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-06 15:22:29,840 WARN  L250   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.circular_pointer_top_w8_d128_e0.c[1280,1293]
[2024-11-06 15:22:30,056 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 15:22:30,071 INFO  L204         MainTranslator]: Completed translation
[2024-11-06 15:22:30,073 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30 WrapperNode
[2024-11-06 15:22:30,073 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-06 15:22:30,074 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-06 15:22:30,074 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-06 15:22:30,075 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-06 15:22:30,081 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,152 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,281 INFO  L138                Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 4725
[2024-11-06 15:22:30,282 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-06 15:22:30,282 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-06 15:22:30,282 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-06 15:22:30,283 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-06 15:22:30,292 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,293 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,331 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,458 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 15:22:30,458 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,459 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,605 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,626 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,644 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,663 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,692 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-06 15:22:30,693 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-06 15:22:30,693 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-06 15:22:30,693 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-06 15:22:30,694 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (1/1) ...
[2024-11-06 15:22:30,699 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 15:22:30,710 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 15:22:30,723 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 15:22:30,730 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 15:22:30,752 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-06 15:22:30,753 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-11-06 15:22:30,753 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2024-11-06 15:22:30,753 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2024-11-06 15:22:30,753 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-06 15:22:30,753 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-06 15:22:31,361 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-06 15:22:31,363 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-06 15:22:35,198 INFO  L?                        ?]: Removed 1281 outVars from TransFormulas that were not future-live.
[2024-11-06 15:22:35,200 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-06 15:22:35,213 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-06 15:22:35,213 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-11-06 15:22:35,213 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:22:35 BoogieIcfgContainer
[2024-11-06 15:22:35,213 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-06 15:22:35,217 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-06 15:22:35,217 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-06 15:22:35,220 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-06 15:22:35,220 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 03:22:28" (1/3) ...
[2024-11-06 15:22:35,221 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7579d18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:22:35, skipping insertion in model container
[2024-11-06 15:22:35,221 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:22:30" (2/3) ...
[2024-11-06 15:22:35,222 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7579d18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:22:35, skipping insertion in model container
[2024-11-06 15:22:35,222 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:22:35" (3/3) ...
[2024-11-06 15:22:35,224 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.circular_pointer_top_w8_d128_e0.c
[2024-11-06 15:22:35,239 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-06 15:22:35,239 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-06 15:22:35,295 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-06 15:22:35,301 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;@13915bf1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-06 15:22:35,301 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-06 15:22:35,305 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2024-11-06 15:22:35,312 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2024-11-06 15:22:35,313 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 15:22:35,314 INFO  L215           NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-06 15:22:35,314 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 15:22:35,319 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 15:22:35,320 INFO  L85        PathProgramCache]: Analyzing trace with hash 1944675641, now seen corresponding path program 1 times
[2024-11-06 15:22:35,337 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 15:22:35,337 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917152319]
[2024-11-06 15:22:35,338 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 15:22:35,338 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 15:22:35,338 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 15:22:35,340 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 15:22:35,343 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 15:22:36,597 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 15:22:36,620 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 1 conjuncts are in the unsatisfiable core
[2024-11-06 15:22:36,636 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 15:22:36,661 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2024-11-06 15:22:36,661 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 15:22:36,664 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 15:22:36,664 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917152319]
[2024-11-06 15:22:36,665 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [917152319] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 15:22:36,665 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-06 15:22:36,665 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-11-06 15:22:36,666 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050165131]
[2024-11-06 15:22:36,667 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 15:22:36,670 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2024-11-06 15:22:36,671 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 15:22:36,690 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2024-11-06 15:22:36,690 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-11-06 15:22:36,693 INFO  L87              Difference]: Start difference. First operand  has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2024-11-06 15:22:36,710 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 15:22:36,710 INFO  L93              Difference]: Finished difference Result 35 states and 47 transitions.
[2024-11-06 15:22:36,711 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-11-06 15:22:36,712 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23
[2024-11-06 15:22:36,712 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 15:22:36,718 INFO  L225             Difference]: With dead ends: 35
[2024-11-06 15:22:36,719 INFO  L226             Difference]: Without dead ends: 17
[2024-11-06 15:22:36,721 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 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 15:22:36,724 INFO  L432           NwaCegarLoop]: 19 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, 19 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 15:22:36,725 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-06 15:22:36,740 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2024-11-06 15:22:36,754 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2024-11-06 15:22:36,755 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2024-11-06 15:22:36,756 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions.
[2024-11-06 15:22:36,758 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 23
[2024-11-06 15:22:36,758 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 15:22:36,758 INFO  L471      AbstractCegarLoop]: Abstraction has 17 states and 19 transitions.
[2024-11-06 15:22:36,758 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2024-11-06 15:22:36,759 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions.
[2024-11-06 15:22:36,762 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2024-11-06 15:22:36,762 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 15:22:36,762 INFO  L215           NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-06 15:22:36,784 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2024-11-06 15:22:36,963 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 15:22:36,964 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 15:22:36,965 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 15:22:36,965 INFO  L85        PathProgramCache]: Analyzing trace with hash 265954675, now seen corresponding path program 1 times
[2024-11-06 15:22:36,968 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 15:22:36,968 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133922677]
[2024-11-06 15:22:36,968 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 15:22:36,968 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 15:22:36,969 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 15:22:36,970 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 15:22:36,971 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 15:22:38,259 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 15:22:38,275 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 20 conjuncts are in the unsatisfiable core
[2024-11-06 15:22:38,292 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 15:22:38,531 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2024-11-06 15:22:38,531 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 15:22:38,668 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 15:22:38,668 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133922677]
[2024-11-06 15:22:38,668 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [133922677] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-06 15:22:38,668 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1117181608]
[2024-11-06 15:22:38,668 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 15:22:38,669 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-06 15:22:38,669 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-06 15:22:38,687 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-06 15:22:38,688 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process
[2024-11-06 15:22:40,740 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 15:22:40,782 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 15 conjuncts are in the unsatisfiable core
[2024-11-06 15:22:40,794 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 15:22:40,878 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2024-11-06 15:22:40,878 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 15:22:40,878 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1117181608] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 15:22:40,879 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2024-11-06 15:22:40,879 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7
[2024-11-06 15:22:40,879 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365713934]
[2024-11-06 15:22:40,880 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 15:22:40,880 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2024-11-06 15:22:40,880 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 15:22:40,881 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2024-11-06 15:22:40,881 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2024-11-06 15:22:40,881 INFO  L87              Difference]: Start difference. First operand 17 states and 19 transitions. Second operand  has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2024-11-06 15:22:41,327 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 15:22:41,327 INFO  L93              Difference]: Finished difference Result 27 states and 32 transitions.
[2024-11-06 15:22:41,328 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-11-06 15:22:41,328 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23
[2024-11-06 15:22:41,328 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 15:22:41,329 INFO  L225             Difference]: With dead ends: 27
[2024-11-06 15:22:41,329 INFO  L226             Difference]: Without dead ends: 25
[2024-11-06 15:22:41,329 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2024-11-06 15:22:41,330 INFO  L432           NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2024-11-06 15:22:41,331 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2024-11-06 15:22:41,332 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2024-11-06 15:22:41,336 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2024-11-06 15:22:41,336 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2024-11-06 15:22:41,337 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions.
[2024-11-06 15:22:41,337 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23
[2024-11-06 15:22:41,338 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 15:22:41,339 INFO  L471      AbstractCegarLoop]: Abstraction has 25 states and 30 transitions.
[2024-11-06 15:22:41,339 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2024-11-06 15:22:41,339 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions.
[2024-11-06 15:22:41,340 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2024-11-06 15:22:41,340 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 15:22:41,340 INFO  L215           NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1]
[2024-11-06 15:22:41,358 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 15:22:41,566 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0
[2024-11-06 15:22:41,741 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,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-06 15:22:41,742 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 15:22:41,742 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 15:22:41,742 INFO  L85        PathProgramCache]: Analyzing trace with hash 416519459, now seen corresponding path program 1 times
[2024-11-06 15:22:41,748 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 15:22:41,748 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224196953]
[2024-11-06 15:22:41,748 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 15:22:41,748 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 15:22:41,749 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 15:22:41,751 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 15:22:41,755 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 15:22:43,594 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 15:22:43,646 INFO  L255         TraceCheckSpWp]: Trace formula consists of 3012 conjuncts, 43 conjuncts are in the unsatisfiable core
[2024-11-06 15:22:43,680 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 15:22:44,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked.
[2024-11-06 15:22:44,256 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 15:22:44,419 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 15:22:44,419 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224196953]
[2024-11-06 15:22:44,419 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224196953] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-06 15:22:44,419 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1207028041]
[2024-11-06 15:22:44,419 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 15:22:44,420 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-06 15:22:44,420 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-06 15:22:44,422 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-06 15:22:44,424 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process
[2024-11-06 15:22:48,188 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 15:22:48,320 INFO  L255         TraceCheckSpWp]: Trace formula consists of 3012 conjuncts, 40 conjuncts are in the unsatisfiable core
[2024-11-06 15:22:48,346 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 15:22:48,615 INFO  L134       CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked.
[2024-11-06 15:22:48,615 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 15:22:48,819 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1207028041] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-06 15:22:48,820 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-06 15:22:48,820 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10
[2024-11-06 15:22:48,820 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446433620]
[2024-11-06 15:22:48,820 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-06 15:22:48,821 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2024-11-06 15:22:48,821 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 15:22:48,822 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2024-11-06 15:22:48,822 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132
[2024-11-06 15:22:48,822 INFO  L87              Difference]: Start difference. First operand 25 states and 30 transitions. Second operand  has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6)
[2024-11-06 15:22:49,989 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 15:22:49,989 INFO  L93              Difference]: Finished difference Result 36 states and 44 transitions.
[2024-11-06 15:22:49,989 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2024-11-06 15:22:49,990 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44
[2024-11-06 15:22:49,990 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 15:22:49,991 INFO  L225             Difference]: With dead ends: 36
[2024-11-06 15:22:49,991 INFO  L226             Difference]: Without dead ends: 34
[2024-11-06 15:22:49,991 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240
[2024-11-06 15:22:49,992 INFO  L432           NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2024-11-06 15:22:49,992 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2024-11-06 15:22:49,995 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2024-11-06 15:22:50,001 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34.
[2024-11-06 15:22:50,001 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2024-11-06 15:22:50,002 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions.
[2024-11-06 15:22:50,003 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 44
[2024-11-06 15:22:50,003 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 15:22:50,003 INFO  L471      AbstractCegarLoop]: Abstraction has 34 states and 42 transitions.
[2024-11-06 15:22:50,004 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6)
[2024-11-06 15:22:50,004 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions.
[2024-11-06 15:22:50,005 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2024-11-06 15:22:50,005 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 15:22:50,006 INFO  L215           NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1]
[2024-11-06 15:22:50,029 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2024-11-06 15:22:50,249 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0
[2024-11-06 15:22:50,406 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,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-06 15:22:50,407 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 15:22:50,407 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 15:22:50,408 INFO  L85        PathProgramCache]: Analyzing trace with hash 223728499, now seen corresponding path program 2 times
[2024-11-06 15:22:50,412 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 15:22:50,412 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508856952]
[2024-11-06 15:22:50,412 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2024-11-06 15:22:50,412 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 15:22:50,412 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 15:22:50,415 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 15:22:50,417 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 15:22:53,227 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2024-11-06 15:22:53,227 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-06 15:22:53,273 INFO  L255         TraceCheckSpWp]: Trace formula consists of 4436 conjuncts, 87 conjuncts are in the unsatisfiable core
[2024-11-06 15:22:53,305 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 15:22:56,568 INFO  L134       CoverageAnalysis]: Checked inductivity of 169 backedges. 12 proven. 55 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked.
[2024-11-06 15:22:56,569 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 15:23:34,637 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 15:23:34,637 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508856952]
[2024-11-06 15:23:34,637 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [508856952] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-06 15:23:34,637 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1072363206]
[2024-11-06 15:23:34,637 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2024-11-06 15:23:34,638 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-06 15:23:34,638 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-06 15:23:34,639 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-06 15:23:34,640 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process
[2024-11-06 15:23:40,748 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2024-11-06 15:23:40,749 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-06 15:23:41,027 INFO  L255         TraceCheckSpWp]: Trace formula consists of 4436 conjuncts, 86 conjuncts are in the unsatisfiable core
[2024-11-06 15:23:41,061 INFO  L278         TraceCheckSpWp]: Computing forward predicates...