/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.arbitrated_top_n2_w16_d128_e0.c


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


This is Ultimate 0.2.5-dev-17387ad-m
[2024-11-06 14:36:01,043 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-06 14:36:01,121 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 14:36:01,126 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-06 14:36:01,126 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-06 14:36:01,150 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-06 14:36:01,151 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-06 14:36:01,151 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-06 14:36:01,152 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-11-06 14:36:01,152 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-11-06 14:36:01,153 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-06 14:36:01,153 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-06 14:36:01,154 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-06 14:36:01,154 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-06 14:36:01,154 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-11-06 14:36:01,155 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-06 14:36:01,155 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-06 14:36:01,155 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-06 14:36:01,156 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-06 14:36:01,156 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-06 14:36:01,156 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-06 14:36:01,160 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-06 14:36:01,161 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-11-06 14:36:01,161 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-06 14:36:01,161 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-11-06 14:36:01,161 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-06 14:36:01,161 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-06 14:36:01,162 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-06 14:36:01,162 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-11-06 14:36:01,162 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-06 14:36:01,163 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-06 14:36:01,163 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 14:36:01,163 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-06 14:36:01,163 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-06 14:36:01,163 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-06 14:36:01,164 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-11-06 14:36:01,164 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2024-11-06 14:36:01,166 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-06 14:36:01,166 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-11-06 14:36:01,166 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-11-06 14:36:01,167 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-06 14:36:01,167 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FOX
[2024-11-06 14:36:01,386 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-06 14:36:01,404 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-06 14:36:01,406 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-06 14:36:01,407 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-06 14:36:01,407 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-06 14:36:01,408 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w16_d128_e0.c
[2024-11-06 14:36:02,839 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-06 14:36:03,267 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-06 14:36:03,268 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w16_d128_e0.c
[2024-11-06 14:36:03,310 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c2cb33b1/e140e9e041f14c5f962be8b9ba0acd30/FLAGc75c64f48
[2024-11-06 14:36:03,417 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c2cb33b1/e140e9e041f14c5f962be8b9ba0acd30
[2024-11-06 14:36:03,419 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-06 14:36:03,420 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-11-06 14:36:03,422 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-06 14:36:03,422 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-06 14:36:03,426 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-06 14:36:03,426 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:36:03" (1/1) ...
[2024-11-06 14:36:03,427 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37952c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:03, skipping insertion in model container
[2024-11-06 14:36:03,427 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:36:03" (1/1) ...
[2024-11-06 14:36:03,545 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-06 14:36:03,812 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.arbitrated_top_n2_w16_d128_e0.c[1272,1285]
[2024-11-06 14:36:04,452 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 14:36:04,464 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-06 14:36:04,475 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.arbitrated_top_n2_w16_d128_e0.c[1272,1285]
[2024-11-06 14:36:04,867 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 14:36:04,883 INFO  L204         MainTranslator]: Completed translation
[2024-11-06 14:36:04,885 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04 WrapperNode
[2024-11-06 14:36:04,885 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-06 14:36:04,887 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-06 14:36:04,887 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-06 14:36:04,887 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-06 14:36:04,893 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:04,996 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:05,265 INFO  L138                Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 8527
[2024-11-06 14:36:05,266 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-06 14:36:05,266 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-06 14:36:05,266 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-06 14:36:05,266 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-06 14:36:05,276 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:05,277 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:05,340 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:05,484 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 14:36:05,484 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:05,484 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:05,606 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:05,627 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:05,649 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:05,678 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:05,733 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-06 14:36:05,735 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-06 14:36:05,735 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-06 14:36:05,735 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-06 14:36:05,736 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (1/1) ...
[2024-11-06 14:36:05,741 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 14:36:05,754 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 14:36:05,769 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 14:36:05,774 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 14:36:05,797 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-06 14:36:05,798 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-11-06 14:36:05,798 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2024-11-06 14:36:05,798 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2024-11-06 14:36:05,798 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-06 14:36:05,798 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-06 14:36:06,842 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-06 14:36:06,844 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-06 14:36:14,475 INFO  L?                        ?]: Removed 2345 outVars from TransFormulas that were not future-live.
[2024-11-06 14:36:14,476 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-06 14:36:14,491 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-06 14:36:14,492 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-11-06 14:36:14,492 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:36:14 BoogieIcfgContainer
[2024-11-06 14:36:14,492 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-06 14:36:14,494 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-06 14:36:14,494 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-06 14:36:14,498 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-06 14:36:14,498 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:36:03" (1/3) ...
[2024-11-06 14:36:14,499 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e0e542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:36:14, skipping insertion in model container
[2024-11-06 14:36:14,499 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:04" (2/3) ...
[2024-11-06 14:36:14,499 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e0e542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:36:14, skipping insertion in model container
[2024-11-06 14:36:14,500 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:36:14" (3/3) ...
[2024-11-06 14:36:14,501 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.arbitrated_top_n2_w16_d128_e0.c
[2024-11-06 14:36:14,518 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-06 14:36:14,518 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-06 14:36:14,583 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-06 14:36:14,589 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;@4fdc690e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-06 14:36:14,589 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-06 14:36:14,593 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2024-11-06 14:36:14,600 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2024-11-06 14:36:14,600 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 14:36:14,600 INFO  L215           NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-06 14:36:14,601 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 14:36:14,605 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 14:36:14,605 INFO  L85        PathProgramCache]: Analyzing trace with hash -1387212075, now seen corresponding path program 1 times
[2024-11-06 14:36:14,622 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 14:36:14,623 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904668748]
[2024-11-06 14:36:14,623 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 14:36:14,623 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 14:36:14,624 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 14:36:14,626 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 14:36:14,631 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 14:36:16,644 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 14:36:16,685 INFO  L255         TraceCheckSpWp]: Trace formula consists of 2825 conjuncts, 1 conjuncts are in the unsatisfiable core
[2024-11-06 14:36:16,715 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:36:16,747 INFO  L134       CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked.
[2024-11-06 14:36:16,748 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 14:36:16,748 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 14:36:16,749 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904668748]
[2024-11-06 14:36:16,749 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [904668748] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 14:36:16,749 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-06 14:36:16,750 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-11-06 14:36:16,752 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54673542]
[2024-11-06 14:36:16,754 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 14:36:16,758 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2024-11-06 14:36:16,758 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 14:36:16,780 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2024-11-06 14:36:16,781 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-11-06 14:36:16,783 INFO  L87              Difference]: Start difference. First operand  has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand  has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7)
[2024-11-06 14:36:16,799 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 14:36:16,799 INFO  L93              Difference]: Finished difference Result 51 states and 75 transitions.
[2024-11-06 14:36:16,800 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-11-06 14:36:16,802 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47
[2024-11-06 14:36:16,802 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 14:36:16,808 INFO  L225             Difference]: With dead ends: 51
[2024-11-06 14:36:16,808 INFO  L226             Difference]: Without dead ends: 25
[2024-11-06 14:36:16,811 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 46 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 14:36:16,818 INFO  L432           NwaCegarLoop]: 31 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, 31 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 14:36:16,819 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-06 14:36:16,839 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2024-11-06 14:36:16,858 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2024-11-06 14:36:16,859 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2024-11-06 14:36:16,860 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions.
[2024-11-06 14:36:16,862 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 47
[2024-11-06 14:36:16,862 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 14:36:16,862 INFO  L471      AbstractCegarLoop]: Abstraction has 25 states and 31 transitions.
[2024-11-06 14:36:16,863 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7)
[2024-11-06 14:36:16,863 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions.
[2024-11-06 14:36:16,864 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2024-11-06 14:36:16,864 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 14:36:16,864 INFO  L215           NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-06 14:36:16,889 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 14:36:17,065 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 14:36:17,066 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 14:36:17,066 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 14:36:17,067 INFO  L85        PathProgramCache]: Analyzing trace with hash 971432711, now seen corresponding path program 1 times
[2024-11-06 14:36:17,073 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 14:36:17,074 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899529212]
[2024-11-06 14:36:17,074 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 14:36:17,074 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 14:36:17,075 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 14:36:17,077 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 14:36:17,078 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 14:36:19,088 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 14:36:19,120 INFO  L255         TraceCheckSpWp]: Trace formula consists of 2825 conjuncts, 20 conjuncts are in the unsatisfiable core
[2024-11-06 14:36:19,145 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:36:19,579 INFO  L134       CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked.
[2024-11-06 14:36:19,579 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 14:36:19,784 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 14:36:19,784 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899529212]
[2024-11-06 14:36:19,784 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [899529212] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-06 14:36:19,784 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1542050263]
[2024-11-06 14:36:19,785 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 14:36:19,785 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-06 14:36:19,785 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-06 14:36:19,790 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 14:36:19,791 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 14:36:23,651 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 14:36:23,786 INFO  L255         TraceCheckSpWp]: Trace formula consists of 2825 conjuncts, 14 conjuncts are in the unsatisfiable core
[2024-11-06 14:36:23,813 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:36:24,028 INFO  L134       CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2024-11-06 14:36:24,028 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 14:36:24,028 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1542050263] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 14:36:24,028 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2024-11-06 14:36:24,029 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7
[2024-11-06 14:36:24,029 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564001593]
[2024-11-06 14:36:24,030 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 14:36:24,030 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2024-11-06 14:36:24,030 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 14:36:24,031 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2024-11-06 14:36:24,031 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2024-11-06 14:36:24,032 INFO  L87              Difference]: Start difference. First operand 25 states and 31 transitions. Second operand  has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7)
[2024-11-06 14:36:25,412 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2024-11-06 14:36:25,664 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 14:36:25,664 INFO  L93              Difference]: Finished difference Result 43 states and 56 transitions.
[2024-11-06 14:36:25,665 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-11-06 14:36:25,665 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 47
[2024-11-06 14:36:25,665 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 14:36:25,666 INFO  L225             Difference]: With dead ends: 43
[2024-11-06 14:36:25,667 INFO  L226             Difference]: Without dead ends: 41
[2024-11-06 14:36:25,667 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2024-11-06 14:36:25,669 INFO  L432           NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2024-11-06 14:36:25,670 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2024-11-06 14:36:25,673 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2024-11-06 14:36:25,679 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41.
[2024-11-06 14:36:25,680 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 41 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14)
[2024-11-06 14:36:25,681 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions.
[2024-11-06 14:36:25,682 INFO  L78                 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 47
[2024-11-06 14:36:25,683 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 14:36:25,683 INFO  L471      AbstractCegarLoop]: Abstraction has 41 states and 54 transitions.
[2024-11-06 14:36:25,683 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7)
[2024-11-06 14:36:25,683 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions.
[2024-11-06 14:36:25,685 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 93
[2024-11-06 14:36:25,686 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 14:36:25,686 INFO  L215           NwaCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1]
[2024-11-06 14:36:25,711 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 14:36:25,926 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 14:36:26,086 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 14:36:26,088 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 14:36:26,088 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 14:36:26,088 INFO  L85        PathProgramCache]: Analyzing trace with hash 815302051, now seen corresponding path program 1 times
[2024-11-06 14:36:26,092 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 14:36:26,093 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174803504]
[2024-11-06 14:36:26,093 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 14:36:26,093 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 14:36:26,093 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 14:36:26,095 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 14:36:26,096 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 14:36:29,633 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 14:36:29,726 INFO  L255         TraceCheckSpWp]: Trace formula consists of 5469 conjuncts, 43 conjuncts are in the unsatisfiable core
[2024-11-06 14:36:29,769 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:36:30,607 INFO  L134       CoverageAnalysis]: Checked inductivity of 380 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked.
[2024-11-06 14:36:30,607 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 14:36:30,772 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 14:36:30,772 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174803504]
[2024-11-06 14:36:30,772 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174803504] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-06 14:36:30,772 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260293379]
[2024-11-06 14:36:30,773 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 14:36:30,773 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-06 14:36:30,773 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-06 14:36:30,775 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 14:36:30,776 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 14:36:38,260 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 14:36:38,568 INFO  L255         TraceCheckSpWp]: Trace formula consists of 5469 conjuncts, 40 conjuncts are in the unsatisfiable core
[2024-11-06 14:36:38,609 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:36:39,164 INFO  L134       CoverageAnalysis]: Checked inductivity of 380 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked.
[2024-11-06 14:36:39,164 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 14:36:39,288 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260293379] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-06 14:36:39,289 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-06 14:36:39,289 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10
[2024-11-06 14:36:39,289 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381126729]
[2024-11-06 14:36:39,289 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-06 14:36:39,290 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2024-11-06 14:36:39,290 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 14:36:39,291 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2024-11-06 14:36:39,291 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132
[2024-11-06 14:36:39,291 INFO  L87              Difference]: Start difference. First operand 41 states and 54 transitions. Second operand  has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14)
[2024-11-06 14:36:41,068 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2024-11-06 14:36:42,999 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2024-11-06 14:36:43,174 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 14:36:43,174 INFO  L93              Difference]: Finished difference Result 60 states and 80 transitions.
[2024-11-06 14:36:43,175 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2024-11-06 14:36:43,175 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 92
[2024-11-06 14:36:43,176 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 14:36:43,177 INFO  L225             Difference]: With dead ends: 60
[2024-11-06 14:36:43,177 INFO  L226             Difference]: Without dead ends: 58
[2024-11-06 14:36:43,177 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240
[2024-11-06 14:36:43,178 INFO  L432           NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time
[2024-11-06 14:36:43,179 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 142 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time]
[2024-11-06 14:36:43,180 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2024-11-06 14:36:43,188 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58.
[2024-11-06 14:36:43,189 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 58 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21)
[2024-11-06 14:36:43,191 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions.
[2024-11-06 14:36:43,191 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 92
[2024-11-06 14:36:43,191 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 14:36:43,192 INFO  L471      AbstractCegarLoop]: Abstraction has 58 states and 78 transitions.
[2024-11-06 14:36:43,192 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14)
[2024-11-06 14:36:43,192 INFO  L276                IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions.
[2024-11-06 14:36:43,194 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 138
[2024-11-06 14:36:43,194 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 14:36:43,196 INFO  L215           NwaCegarLoop]: trace histogram [21, 21, 21, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1]
[2024-11-06 14:36:43,230 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 14:36:43,472 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0
[2024-11-06 14:36:43,596 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 14:36:43,597 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 14:36:43,598 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 14:36:43,598 INFO  L85        PathProgramCache]: Analyzing trace with hash -1845464953, now seen corresponding path program 2 times
[2024-11-06 14:36:43,605 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 14:36:43,606 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340878152]
[2024-11-06 14:36:43,606 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2024-11-06 14:36:43,606 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 14:36:43,606 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 14:36:43,607 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 14:36:43,608 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 14:37:06,063 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2024-11-06 14:37:06,063 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-06 14:37:06,167 INFO  L255         TraceCheckSpWp]: Trace formula consists of 8113 conjuncts, 143 conjuncts are in the unsatisfiable core
[2024-11-06 14:37:06,221 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:37:12,388 INFO  L134       CoverageAnalysis]: Checked inductivity of 889 backedges. 132 proven. 121 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked.
[2024-11-06 14:37:12,388 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 14:37:13,665 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 14:37:13,666 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340878152]
[2024-11-06 14:37:13,666 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [340878152] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-06 14:37:13,666 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [239540838]
[2024-11-06 14:37:13,666 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2024-11-06 14:37:13,666 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-06 14:37:13,666 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-06 14:37:13,667 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 14:37:13,669 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 14:37:25,679 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2024-11-06 14:37:25,679 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-06 14:37:26,328 INFO  L255         TraceCheckSpWp]: Trace formula consists of 8113 conjuncts, 145 conjuncts are in the unsatisfiable core
[2024-11-06 14:37:26,379 INFO  L278         TraceCheckSpWp]: Computing forward predicates...