/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_w64_d128_e0.c


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


This is Ultimate 0.2.5-dev-17387ad-m
[2024-11-06 14:36:51,310 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-06 14:36:51,382 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 14:36:51,386 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-06 14:36:51,387 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-06 14:36:51,411 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-06 14:36:51,411 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-06 14:36:51,411 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-06 14:36:51,412 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-11-06 14:36:51,412 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-11-06 14:36:51,413 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-06 14:36:51,413 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-06 14:36:51,413 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-06 14:36:51,414 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-06 14:36:51,414 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-11-06 14:36:51,414 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-06 14:36:51,415 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-06 14:36:51,415 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-06 14:36:51,415 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-06 14:36:51,416 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-06 14:36:51,416 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-06 14:36:51,419 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-06 14:36:51,419 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-11-06 14:36:51,420 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-06 14:36:51,420 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-11-06 14:36:51,420 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-06 14:36:51,420 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-06 14:36:51,421 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-06 14:36:51,421 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-11-06 14:36:51,421 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-06 14:36:51,421 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-06 14:36:51,422 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 14:36:51,422 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-06 14:36:51,422 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-06 14:36:51,423 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-06 14:36:51,423 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-11-06 14:36:51,423 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2024-11-06 14:36:51,423 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-06 14:36:51,424 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-11-06 14:36:51,424 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-11-06 14:36:51,424 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-06 14:36:51,424 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FOX
[2024-11-06 14:36:51,631 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-06 14:36:51,652 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-06 14:36:51,655 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-06 14:36:51,656 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-06 14:36:51,657 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-06 14:36:51,658 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d128_e0.c
[2024-11-06 14:36:53,070 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-06 14:36:53,483 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-06 14:36:53,484 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d128_e0.c
[2024-11-06 14:36:53,516 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c71528ce/deb042f9df5448c68041c2b969f648a6/FLAGacb908552
[2024-11-06 14:36:53,529 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c71528ce/deb042f9df5448c68041c2b969f648a6
[2024-11-06 14:36:53,532 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-06 14:36:53,534 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-11-06 14:36:53,536 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-06 14:36:53,536 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-06 14:36:53,540 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-06 14:36:53,541 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:36:53" (1/1) ...
[2024-11-06 14:36:53,542 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@628cf93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:53, skipping insertion in model container
[2024-11-06 14:36:53,542 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:36:53" (1/1) ...
[2024-11-06 14:36:53,662 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-06 14:36:53,930 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_w64_d128_e0.c[1326,1339]
[2024-11-06 14:36:54,643 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 14:36:54,655 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-06 14:36:54,667 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_w64_d128_e0.c[1326,1339]
[2024-11-06 14:36:55,057 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 14:36:55,072 INFO  L204         MainTranslator]: Completed translation
[2024-11-06 14:36:55,074 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55 WrapperNode
[2024-11-06 14:36:55,075 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-06 14:36:55,076 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-06 14:36:55,076 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-06 14:36:55,076 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-06 14:36:55,083 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,191 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,428 INFO  L138                Inliner]: procedures = 18, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 9007
[2024-11-06 14:36:55,429 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-06 14:36:55,429 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-06 14:36:55,429 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-06 14:36:55,429 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-06 14:36:55,439 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,440 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,553 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,664 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 14:36:55,664 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,664 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,821 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,847 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,876 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,903 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,954 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-06 14:36:55,955 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-06 14:36:55,955 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-06 14:36:55,956 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-06 14:36:55,957 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (1/1) ...
[2024-11-06 14:36:55,962 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 14:36:55,971 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 14:36:55,984 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 14:36:55,989 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 14:36:56,015 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-06 14:36:56,015 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-11-06 14:36:56,015 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2024-11-06 14:36:56,015 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2024-11-06 14:36:56,015 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-06 14:36:56,015 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-06 14:36:57,093 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-06 14:36:57,096 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-06 14:37:06,364 INFO  L?                        ?]: Removed 2681 outVars from TransFormulas that were not future-live.
[2024-11-06 14:37:06,366 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-06 14:37:06,377 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-06 14:37:06,378 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-11-06 14:37:06,380 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:37:06 BoogieIcfgContainer
[2024-11-06 14:37:06,380 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-06 14:37:06,382 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-06 14:37:06,382 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-06 14:37:06,385 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-06 14:37:06,385 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:36:53" (1/3) ...
[2024-11-06 14:37:06,386 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7e3000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:37:06, skipping insertion in model container
[2024-11-06 14:37:06,386 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:36:55" (2/3) ...
[2024-11-06 14:37:06,386 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7e3000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:37:06, skipping insertion in model container
[2024-11-06 14:37:06,387 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:37:06" (3/3) ...
[2024-11-06 14:37:06,388 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.arbitrated_top_n2_w64_d128_e0.c
[2024-11-06 14:37:06,404 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-06 14:37:06,404 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-06 14:37:06,461 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-06 14:37:06,467 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;@12f901dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-06 14:37:06,468 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-06 14:37:06,472 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 14:37:06,479 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2024-11-06 14:37:06,480 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 14:37:06,481 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 14:37:06,481 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 14:37:06,485 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 14:37:06,486 INFO  L85        PathProgramCache]: Analyzing trace with hash -1387212075, now seen corresponding path program 1 times
[2024-11-06 14:37:06,505 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 14:37:06,505 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319098599]
[2024-11-06 14:37:06,505 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 14:37:06,506 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 14:37:06,506 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 14:37:06,508 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 14:37:06,511 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 14:37:08,884 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 14:37:08,948 INFO  L255         TraceCheckSpWp]: Trace formula consists of 3209 conjuncts, 1 conjuncts are in the unsatisfiable core
[2024-11-06 14:37:08,974 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:37:09,003 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 14:37:09,003 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 14:37:09,004 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 14:37:09,004 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319098599]
[2024-11-06 14:37:09,004 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [319098599] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 14:37:09,005 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-06 14:37:09,005 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-11-06 14:37:09,006 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056305718]
[2024-11-06 14:37:09,007 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 14:37:09,011 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2024-11-06 14:37:09,011 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 14:37:09,031 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2024-11-06 14:37:09,032 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-11-06 14:37:09,034 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 14:37:09,058 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 14:37:09,058 INFO  L93              Difference]: Finished difference Result 51 states and 75 transitions.
[2024-11-06 14:37:09,060 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-11-06 14:37:09,061 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 14:37:09,062 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 14:37:09,068 INFO  L225             Difference]: With dead ends: 51
[2024-11-06 14:37:09,068 INFO  L226             Difference]: Without dead ends: 25
[2024-11-06 14:37:09,072 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 14:37:09,077 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 14:37:09,078 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 14:37:09,093 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2024-11-06 14:37:09,108 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2024-11-06 14:37:09,109 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 14:37:09,110 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions.
[2024-11-06 14:37:09,113 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 47
[2024-11-06 14:37:09,113 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 14:37:09,113 INFO  L471      AbstractCegarLoop]: Abstraction has 25 states and 31 transitions.
[2024-11-06 14:37:09,113 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 14:37:09,114 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions.
[2024-11-06 14:37:09,116 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2024-11-06 14:37:09,116 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 14:37:09,116 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 14:37:09,162 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 14:37:09,317 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 14:37:09,318 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 14:37:09,319 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 14:37:09,319 INFO  L85        PathProgramCache]: Analyzing trace with hash 971432711, now seen corresponding path program 1 times
[2024-11-06 14:37:09,324 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 14:37:09,324 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782975897]
[2024-11-06 14:37:09,324 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 14:37:09,325 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 14:37:09,325 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 14:37:09,327 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 14:37:09,328 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 14:37:11,589 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 14:37:11,654 INFO  L255         TraceCheckSpWp]: Trace formula consists of 3209 conjuncts, 20 conjuncts are in the unsatisfiable core
[2024-11-06 14:37:11,675 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:37:12,276 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 14:37:12,276 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 14:37:12,578 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 14:37:12,578 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782975897]
[2024-11-06 14:37:12,579 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782975897] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-06 14:37:12,579 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [841784832]
[2024-11-06 14:37:12,579 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 14:37:12,579 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-06 14:37:12,579 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-06 14:37:12,600 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 14:37:12,601 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 14:37:17,741 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 14:37:17,871 INFO  L255         TraceCheckSpWp]: Trace formula consists of 3209 conjuncts, 15 conjuncts are in the unsatisfiable core
[2024-11-06 14:37:17,899 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:37:18,172 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 14:37:18,172 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 14:37:18,173 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleCvc4 [841784832] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 14:37:18,173 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2024-11-06 14:37:18,173 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7
[2024-11-06 14:37:18,174 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548221039]
[2024-11-06 14:37:18,174 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 14:37:18,175 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2024-11-06 14:37:18,175 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 14:37:18,177 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2024-11-06 14:37:18,178 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2024-11-06 14:37:18,178 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 14:37:19,858 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2024-11-06 14:37:20,394 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 14:37:20,394 INFO  L93              Difference]: Finished difference Result 43 states and 56 transitions.
[2024-11-06 14:37:20,395 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-11-06 14:37:20,395 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 14:37:20,396 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 14:37:20,397 INFO  L225             Difference]: With dead ends: 43
[2024-11-06 14:37:20,397 INFO  L226             Difference]: Without dead ends: 41
[2024-11-06 14:37:20,397 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2024-11-06 14:37:20,400 INFO  L432           NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.2s IncrementalHoareTripleChecker+Time
[2024-11-06 14:37:20,400 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time]
[2024-11-06 14:37:20,402 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2024-11-06 14:37:20,412 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41.
[2024-11-06 14:37:20,412 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 14:37:20,413 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions.
[2024-11-06 14:37:20,414 INFO  L78                 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 47
[2024-11-06 14:37:20,415 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 14:37:20,415 INFO  L471      AbstractCegarLoop]: Abstraction has 41 states and 54 transitions.
[2024-11-06 14:37:20,415 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 14:37:20,416 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions.
[2024-11-06 14:37:20,418 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 93
[2024-11-06 14:37:20,418 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 14:37:20,418 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 14:37:20,456 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2024-11-06 14:37:20,677 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0
[2024-11-06 14:37:20,819 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 14:37:20,819 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 14:37:20,820 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 14:37:20,820 INFO  L85        PathProgramCache]: Analyzing trace with hash 815302051, now seen corresponding path program 1 times
[2024-11-06 14:37:20,833 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 14:37:20,834 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643423830]
[2024-11-06 14:37:20,834 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 14:37:20,834 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 14:37:20,834 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 14:37:20,836 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 14:37:20,838 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 14:37:24,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 14:37:24,921 INFO  L255         TraceCheckSpWp]: Trace formula consists of 6141 conjuncts, 43 conjuncts are in the unsatisfiable core
[2024-11-06 14:37:24,968 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:37:26,288 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 14:37:26,288 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 14:37:26,623 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 14:37:26,623 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643423830]
[2024-11-06 14:37:26,623 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643423830] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-06 14:37:26,623 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [982074626]
[2024-11-06 14:37:26,624 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 14:37:26,624 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-06 14:37:26,624 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-06 14:37:26,627 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 14:37:26,627 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 14:37:36,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 14:37:36,460 INFO  L255         TraceCheckSpWp]: Trace formula consists of 6141 conjuncts, 40 conjuncts are in the unsatisfiable core
[2024-11-06 14:37:36,497 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:37:37,556 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 14:37:37,556 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 14:37:37,819 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleCvc4 [982074626] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-06 14:37:37,819 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-06 14:37:37,820 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10
[2024-11-06 14:37:37,820 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754625438]
[2024-11-06 14:37:37,820 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-06 14:37:37,821 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2024-11-06 14:37:37,821 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 14:37:37,821 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2024-11-06 14:37:37,822 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132
[2024-11-06 14:37:37,822 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 14:37:41,169 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2024-11-06 14:37:44,933 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2024-11-06 14:37:45,269 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 14:37:45,269 INFO  L93              Difference]: Finished difference Result 60 states and 80 transitions.
[2024-11-06 14:37:45,270 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2024-11-06 14:37:45,270 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 14:37:45,270 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 14:37:45,271 INFO  L225             Difference]: With dead ends: 60
[2024-11-06 14:37:45,272 INFO  L226             Difference]: Without dead ends: 58
[2024-11-06 14:37:45,272 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240
[2024-11-06 14:37:45,273 INFO  L432           NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s 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, 7.2s IncrementalHoareTripleChecker+Time
[2024-11-06 14:37:45,273 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 142 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time]
[2024-11-06 14:37:45,274 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2024-11-06 14:37:45,283 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58.
[2024-11-06 14:37:45,283 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 14:37:45,285 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions.
[2024-11-06 14:37:45,285 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 92
[2024-11-06 14:37:45,286 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 14:37:45,286 INFO  L471      AbstractCegarLoop]: Abstraction has 58 states and 78 transitions.
[2024-11-06 14:37:45,286 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 14:37:45,286 INFO  L276                IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions.
[2024-11-06 14:37:45,288 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 138
[2024-11-06 14:37:45,290 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 14:37:45,290 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 14:37:45,350 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 14:37:45,610 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 14:37:45,690 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 14:37:45,691 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 14:37:45,692 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 14:37:45,692 INFO  L85        PathProgramCache]: Analyzing trace with hash -1845464953, now seen corresponding path program 2 times
[2024-11-06 14:37:45,699 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 14:37:45,699 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971983567]
[2024-11-06 14:37:45,699 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2024-11-06 14:37:45,700 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 14:37:45,700 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 14:37:45,701 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 14:37:45,703 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 14:38:11,125 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2024-11-06 14:38:11,126 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-06 14:38:11,293 INFO  L255         TraceCheckSpWp]: Trace formula consists of 9073 conjuncts, 145 conjuncts are in the unsatisfiable core
[2024-11-06 14:38:11,344 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 14:38:21,666 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 14:38:21,667 INFO  L311         TraceCheckSpWp]: Computing backward predicates...