/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver bitwuzla -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n5_w8_d8_e0.c


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


This is Ultimate 0.2.5-dev-356b6ba-m
[2024-11-01 20:41:38,809 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-01 20:41:38,869 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2024-11-01 20:41:38,874 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-01 20:41:38,874 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-01 20:41:38,892 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-01 20:41:38,893 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-01 20:41:38,893 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-01 20:41:38,893 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-11-01 20:41:38,894 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-11-01 20:41:38,894 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-01 20:41:38,894 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-01 20:41:38,895 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-01 20:41:38,895 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-01 20:41:38,895 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-11-01 20:41:38,895 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-01 20:41:38,896 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-01 20:41:38,896 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-01 20:41:38,898 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-01 20:41:38,898 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-01 20:41:38,898 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-01 20:41:38,899 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-01 20:41:38,899 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-11-01 20:41:38,899 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-01 20:41:38,899 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-11-01 20:41:38,899 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-01 20:41:38,900 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-01 20:41:38,900 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-01 20:41:38,900 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-11-01 20:41:38,900 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-01 20:41:38,901 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-01 20:41:38,901 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-01 20:41:38,901 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-01 20:41:38,901 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-01 20:41:38,901 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-01 20:41:38,902 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-11-01 20:41:38,902 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2024-11-01 20:41:38,904 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-01 20:41:38,904 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-11-01 20:41:38,905 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-11-01 20:41:38,905 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-01 20:41:38,906 INFO  L153        SettingsManager]:  * Logic for external solver=AUFBV
[2024-11-01 20:41:38,907 INFO  L153        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> bitwuzla
[2024-11-01 20:41:39,152 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-01 20:41:39,166 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-01 20:41:39,168 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-01 20:41:39,168 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-01 20:41:39,169 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-01 20:41:39,169 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n5_w8_d8_e0.c
[2024-11-01 20:41:40,470 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-01 20:41:40,716 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-01 20:41:40,717 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n5_w8_d8_e0.c
[2024-11-01 20:41:40,730 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45ffcc134/38e0b27c312d4acbb20ac200ad7ad60e/FLAG5b861ce8d
[2024-11-01 20:41:41,025 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45ffcc134/38e0b27c312d4acbb20ac200ad7ad60e
[2024-11-01 20:41:41,027 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-01 20:41:41,028 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-11-01 20:41:41,029 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-01 20:41:41,029 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-01 20:41:41,032 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-01 20:41:41,032 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,033 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c562b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41, skipping insertion in model container
[2024-11-01 20:41:41,033 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,091 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-01 20:41:41,255 WARN  L251   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_n5_w8_d8_e0.c[1269,1282]
[2024-11-01 20:41:41,495 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-01 20:41:41,505 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-01 20:41:41,512 WARN  L251   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_n5_w8_d8_e0.c[1269,1282]
[2024-11-01 20:41:41,615 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-01 20:41:41,628 INFO  L204         MainTranslator]: Completed translation
[2024-11-01 20:41:41,629 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41 WrapperNode
[2024-11-01 20:41:41,629 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-01 20:41:41,630 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-01 20:41:41,631 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-01 20:41:41,631 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-01 20:41:41,635 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,668 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,759 INFO  L138                Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2468
[2024-11-01 20:41:41,760 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-01 20:41:41,760 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-01 20:41:41,760 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-01 20:41:41,760 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-01 20:41:41,768 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,769 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,783 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,824 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].
[2024-11-01 20:41:41,824 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,824 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,853 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,861 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,869 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,876 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,891 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-01 20:41:41,892 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-01 20:41:41,892 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-01 20:41:41,893 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-01 20:41:41,893 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (1/1) ...
[2024-11-01 20:41:41,897 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-01 20:41:41,905 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-01 20:41:41,916 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)
[2024-11-01 20:41:41,921 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
[2024-11-01 20:41:41,940 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-01 20:41:41,940 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-11-01 20:41:41,941 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2024-11-01 20:41:41,941 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2024-11-01 20:41:41,941 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-01 20:41:41,941 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-01 20:41:42,235 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-01 20:41:42,237 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-01 20:41:43,489 INFO  L?                        ?]: Removed 815 outVars from TransFormulas that were not future-live.
[2024-11-01 20:41:43,489 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-01 20:41:43,498 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-01 20:41:43,499 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-11-01 20:41:43,499 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 08:41:43 BoogieIcfgContainer
[2024-11-01 20:41:43,499 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-01 20:41:43,501 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-01 20:41:43,501 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-01 20:41:43,503 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-01 20:41:43,503 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.11 08:41:41" (1/3) ...
[2024-11-01 20:41:43,504 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4b0327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 08:41:43, skipping insertion in model container
[2024-11-01 20:41:43,504 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 08:41:41" (2/3) ...
[2024-11-01 20:41:43,504 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4b0327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 08:41:43, skipping insertion in model container
[2024-11-01 20:41:43,504 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 08:41:43" (3/3) ...
[2024-11-01 20:41:43,505 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.arbitrated_top_n5_w8_d8_e0.c
[2024-11-01 20:41:43,516 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-01 20:41:43,516 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-01 20:41:43,556 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-01 20:41:43,562 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;@56ba0398, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-01 20:41:43,562 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-01 20:41:43,566 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 46 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16)
[2024-11-01 20:41:43,574 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2024-11-01 20:41:43,574 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 20:41:43,575 INFO  L215           NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1]
[2024-11-01 20:41:43,576 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 20:41:43,580 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 20:41:43,580 INFO  L85        PathProgramCache]: Analyzing trace with hash -726051243, now seen corresponding path program 1 times
[2024-11-01 20:41:43,586 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 20:41:43,587 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755121184]
[2024-11-01 20:41:43,587 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 20:41:43,588 INFO  L173          SolverBuilder]: Constructing external solver with command: bitwuzla
[2024-11-01 20:41:43,588 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla
[2024-11-01 20:41:43,590 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null)
[2024-11-01 20:41:43,592 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (2)] Waiting until timeout for monitored process
[2024-11-01 20:41:44,212 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 20:41:44,219 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 1 conjuncts are in the unsatisfiable core
[2024-11-01 20:41:44,231 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 20:41:44,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 480 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked.
[2024-11-01 20:41:44,264 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-01 20:41:44,342 INFO  L134       CoverageAnalysis]: Checked inductivity of 480 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked.
[2024-11-01 20:41:44,343 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-01 20:41:44,343 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755121184]
[2024-11-01 20:41:44,343 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1755121184] provided 2 perfect and 0 imperfect interpolant sequences
[2024-11-01 20:41:44,343 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-11-01 20:41:44,343 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2
[2024-11-01 20:41:44,348 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445391326]
[2024-11-01 20:41:44,348 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-11-01 20:41:44,351 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2024-11-01 20:41:44,351 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-01 20:41:44,367 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2024-11-01 20:41:44,367 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-11-01 20:41:44,369 INFO  L87              Difference]: Start difference. First operand  has 46 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand  has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16)
[2024-11-01 20:41:44,388 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-01 20:41:44,389 INFO  L93              Difference]: Finished difference Result 87 states and 138 transitions.
[2024-11-01 20:41:44,389 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-11-01 20:41:44,390 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 101
[2024-11-01 20:41:44,390 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-01 20:41:44,395 INFO  L225             Difference]: With dead ends: 87
[2024-11-01 20:41:44,395 INFO  L226             Difference]: Without dead ends: 43
[2024-11-01 20:41:44,397 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-11-01 20:41:44,399 INFO  L432           NwaCegarLoop]: 58 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, 58 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
[2024-11-01 20:41:44,400 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-01 20:41:44,410 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2024-11-01 20:41:44,428 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43.
[2024-11-01 20:41:44,429 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 43 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16)
[2024-11-01 20:41:44,432 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions.
[2024-11-01 20:41:44,435 INFO  L78                 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 101
[2024-11-01 20:41:44,435 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-01 20:41:44,435 INFO  L471      AbstractCegarLoop]: Abstraction has 43 states and 58 transitions.
[2024-11-01 20:41:44,435 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16)
[2024-11-01 20:41:44,435 INFO  L276                IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions.
[2024-11-01 20:41:44,438 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2024-11-01 20:41:44,438 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 20:41:44,439 INFO  L215           NwaCegarLoop]: trace histogram [16, 16, 16, 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, 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, 1]
[2024-11-01 20:41:44,448 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (2)] Ended with exit code 0
[2024-11-01 20:41:44,643 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla
[2024-11-01 20:41:44,644 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 20:41:44,644 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 20:41:44,645 INFO  L85        PathProgramCache]: Analyzing trace with hash -520200651, now seen corresponding path program 1 times
[2024-11-01 20:41:44,645 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 20:41:44,645 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612361260]
[2024-11-01 20:41:44,645 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 20:41:44,645 INFO  L173          SolverBuilder]: Constructing external solver with command: bitwuzla
[2024-11-01 20:41:44,645 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla
[2024-11-01 20:41:44,647 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null)
[2024-11-01 20:41:44,648 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (3)] Waiting until timeout for monitored process
[2024-11-01 20:41:45,263 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 20:41:45,275 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 24 conjuncts are in the unsatisfiable core
[2024-11-01 20:41:45,285 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 20:41:45,703 INFO  L134       CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked.
[2024-11-01 20:41:45,703 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-01 20:41:46,199 INFO  L134       CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked.
[2024-11-01 20:41:46,200 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-01 20:41:46,200 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612361260]
[2024-11-01 20:41:46,200 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [612361260] provided 2 perfect and 0 imperfect interpolant sequences
[2024-11-01 20:41:46,200 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-11-01 20:41:46,200 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6
[2024-11-01 20:41:46,200 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696442153]
[2024-11-01 20:41:46,200 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-11-01 20:41:46,201 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2024-11-01 20:41:46,202 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-01 20:41:46,202 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2024-11-01 20:41:46,202 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2024-11-01 20:41:46,203 INFO  L87              Difference]: Start difference. First operand 43 states and 58 transitions. Second operand  has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32)
[2024-11-01 20:41:46,479 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-01 20:41:46,479 INFO  L93              Difference]: Finished difference Result 79 states and 110 transitions.
[2024-11-01 20:41:46,479 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-11-01 20:41:46,480 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 101
[2024-11-01 20:41:46,481 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-01 20:41:46,484 INFO  L225             Difference]: With dead ends: 79
[2024-11-01 20:41:46,484 INFO  L226             Difference]: Without dead ends: 77
[2024-11-01 20:41:46,485 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2024-11-01 20:41:46,486 INFO  L432           NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2024-11-01 20:41:46,486 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 192 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2024-11-01 20:41:46,487 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2024-11-01 20:41:46,501 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77.
[2024-11-01 20:41:46,502 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 77 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 32 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32)
[2024-11-01 20:41:46,506 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 108 transitions.
[2024-11-01 20:41:46,506 INFO  L78                 Accepts]: Start accepts. Automaton has 77 states and 108 transitions. Word has length 101
[2024-11-01 20:41:46,507 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-01 20:41:46,507 INFO  L471      AbstractCegarLoop]: Abstraction has 77 states and 108 transitions.
[2024-11-01 20:41:46,507 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32)
[2024-11-01 20:41:46,507 INFO  L276                IsEmpty]: Start isEmpty. Operand 77 states and 108 transitions.
[2024-11-01 20:41:46,513 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 201
[2024-11-01 20:41:46,513 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 20:41:46,514 INFO  L215           NwaCegarLoop]: trace histogram [32, 32, 32, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2024-11-01 20:41:46,523 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (3)] Ended with exit code 0
[2024-11-01 20:41:46,716 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla
[2024-11-01 20:41:46,717 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 20:41:46,717 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 20:41:46,717 INFO  L85        PathProgramCache]: Analyzing trace with hash -511202845, now seen corresponding path program 1 times
[2024-11-01 20:41:46,717 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 20:41:46,717 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647585191]
[2024-11-01 20:41:46,718 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 20:41:46,718 INFO  L173          SolverBuilder]: Constructing external solver with command: bitwuzla
[2024-11-01 20:41:46,718 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla
[2024-11-01 20:41:46,719 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (exit command is (exit), workingDir is null)
[2024-11-01 20:41:46,723 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bitwuzla (4)] Waiting until timeout for monitored process
[2024-11-01 20:41:47,711 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 20:41:47,740 INFO  L255         TraceCheckSpWp]: Trace formula consists of 2027 conjuncts, 783 conjuncts are in the unsatisfiable core
[2024-11-01 20:41:47,816 INFO  L278         TraceCheckSpWp]: Computing forward predicates...