/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.trace.refinement.strategy FOX -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-18.i -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-17387ad-m [2024-11-06 07:51:09,504 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 07:51:09,594 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-06 07:51:09,599 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 07:51:09,599 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 07:51:09,617 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 07:51:09,618 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 07:51:09,618 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 07:51:09,619 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 07:51:09,619 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 07:51:09,619 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 07:51:09,619 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 07:51:09,620 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 07:51:09,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 07:51:09,620 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 07:51:09,620 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 07:51:09,621 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 07:51:09,621 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-06 07:51:09,621 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-06 07:51:09,621 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 07:51:09,622 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 07:51:09,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 07:51:09,626 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 07:51:09,626 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-06 07:51:09,626 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-06 07:51:09,626 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 07:51:09,627 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-06 07:51:09,627 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-06 07:51:09,627 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 07:51:09,627 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 07:51:09,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 07:51:09,628 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 07:51:09,628 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 07:51:09,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 07:51:09,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 07:51:09,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 07:51:09,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 07:51:09,633 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 07:51:09,633 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-06 07:51:09,634 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-06 07:51:09,634 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 07:51:09,634 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 07:51:09,634 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 07:51:09,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 07:51:09,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FOX [2024-11-06 07:51:09,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 07:51:09,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 07:51:09,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 07:51:09,900 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 07:51:09,900 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 07:51:09,901 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-18.i [2024-11-06 07:51:11,393 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 07:51:11,585 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 07:51:11,586 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-18.i [2024-11-06 07:51:11,594 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d5d7175/7737d107871d4a12aa987ee2a23a87ab/FLAG68634ddbc [2024-11-06 07:51:11,609 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d5d7175/7737d107871d4a12aa987ee2a23a87ab [2024-11-06 07:51:11,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 07:51:11,612 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-06 07:51:11,613 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 07:51:11,614 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 07:51:11,620 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 07:51:11,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:11,622 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672e7a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11, skipping insertion in model container [2024-11-06 07:51:11,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:11,645 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 07:51:11,812 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-18.i[916,929] [2024-11-06 07:51:11,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 07:51:11,867 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 07:51:11,878 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-18.i[916,929] [2024-11-06 07:51:11,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 07:51:11,916 INFO L204 MainTranslator]: Completed translation [2024-11-06 07:51:11,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11 WrapperNode [2024-11-06 07:51:11,917 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 07:51:11,918 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 07:51:11,918 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 07:51:11,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 07:51:11,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:11,968 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:12,003 INFO L138 Inliner]: procedures = 27, calls = 27, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 99 [2024-11-06 07:51:12,004 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 07:51:12,004 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 07:51:12,004 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 07:51:12,005 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 07:51:12,015 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:12,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:12,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:12,044 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 07:51:12,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:12,044 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:12,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:12,061 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:12,063 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:12,065 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:12,068 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 07:51:12,069 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 07:51:12,069 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 07:51:12,069 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 07:51:12,070 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (1/1) ... [2024-11-06 07:51:12,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 07:51:12,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 07:51:12,114 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 07:51:12,116 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 07:51:12,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 07:51:12,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-06 07:51:12,141 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-06 07:51:12,141 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-06 07:51:12,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 07:51:12,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 07:51:12,240 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 07:51:12,242 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 07:51:12,495 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-06 07:51:12,496 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 07:51:12,511 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 07:51:12,512 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-06 07:51:12,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:51:12 BoogieIcfgContainer [2024-11-06 07:51:12,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 07:51:12,514 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 07:51:12,514 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 07:51:12,517 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 07:51:12,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:51:11" (1/3) ... [2024-11-06 07:51:12,518 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b481992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:51:12, skipping insertion in model container [2024-11-06 07:51:12,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:51:11" (2/3) ... [2024-11-06 07:51:12,518 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b481992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:51:12, skipping insertion in model container [2024-11-06 07:51:12,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:51:12" (3/3) ... [2024-11-06 07:51:12,519 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_floatingpointinfluence_no-floats_file-18.i [2024-11-06 07:51:12,533 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 07:51:12,533 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 07:51:12,587 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 07:51:12,592 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;@57974ec6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 07:51:12,592 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 07:51:12,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 31 states have internal predecessors, (41), 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 07:51:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-06 07:51:12,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 07:51:12,604 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2024-11-06 07:51:12,605 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 07:51:12,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 07:51:12,609 INFO L85 PathProgramCache]: Analyzing trace with hash -890329808, now seen corresponding path program 1 times [2024-11-06 07:51:12,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 07:51:12,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779757906] [2024-11-06 07:51:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 07:51:12,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-06 07:51:12,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-06 07:51:12,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-06 07:51:12,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-06 07:51:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 07:51:12,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-06 07:51:12,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 07:51:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-11-06 07:51:12,789 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 07:51:12,789 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 07:51:12,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779757906] [2024-11-06 07:51:12,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779757906] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 07:51:12,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 07:51:12,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-06 07:51:12,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953218185] [2024-11-06 07:51:12,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 07:51:12,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-06 07:51:12,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 07:51:12,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-06 07:51:12,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-06 07:51:12,817 INFO L87 Difference]: Start difference. First operand has 47 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 31 states have internal predecessors, (41), 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) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-06 07:51:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 07:51:12,837 INFO L93 Difference]: Finished difference Result 87 states and 146 transitions. [2024-11-06 07:51:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-06 07:51:12,840 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 90 [2024-11-06 07:51:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 07:51:12,845 INFO L225 Difference]: With dead ends: 87 [2024-11-06 07:51:12,845 INFO L226 Difference]: Without dead ends: 43 [2024-11-06 07:51:12,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 89 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 07:51:12,852 INFO L432 NwaCegarLoop]: 62 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, 62 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 07:51:12,853 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 07:51:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-06 07:51:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-06 07:51:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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 07:51:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 62 transitions. [2024-11-06 07:51:12,888 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 62 transitions. Word has length 90 [2024-11-06 07:51:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 07:51:12,889 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 62 transitions. [2024-11-06 07:51:12,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-06 07:51:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 62 transitions. [2024-11-06 07:51:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-06 07:51:12,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 07:51:12,892 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2024-11-06 07:51:12,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-11-06 07:51:13,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-06 07:51:13,093 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 07:51:13,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 07:51:13,094 INFO L85 PathProgramCache]: Analyzing trace with hash -890514448, now seen corresponding path program 1 times [2024-11-06 07:51:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 07:51:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899418161] [2024-11-06 07:51:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 07:51:13,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-06 07:51:13,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-06 07:51:13,102 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-06 07:51:13,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-06 07:51:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 07:51:13,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-06 07:51:13,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 07:51:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-06 07:51:13,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 07:51:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-06 07:51:14,218 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-06 07:51:14,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899418161] [2024-11-06 07:51:14,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899418161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 07:51:14,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 07:51:14,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-11-06 07:51:14,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356567635] [2024-11-06 07:51:14,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 07:51:14,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-06 07:51:14,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-06 07:51:14,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-06 07:51:14,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-06 07:51:14,222 INFO L87 Difference]: Start difference. First operand 43 states and 62 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (28), 2 states have call predecessors, (28), 4 states have call successors, (28) [2024-11-06 07:51:15,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 07:51:15,679 INFO L93 Difference]: Finished difference Result 223 states and 314 transitions. [2024-11-06 07:51:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-06 07:51:15,679 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (28), 2 states have call predecessors, (28), 4 states have call successors, (28) Word has length 90 [2024-11-06 07:51:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 07:51:15,683 INFO L225 Difference]: With dead ends: 223 [2024-11-06 07:51:15,683 INFO L226 Difference]: Without dead ends: 183 [2024-11-06 07:51:15,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2024-11-06 07:51:15,685 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 132 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-06 07:51:15,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 248 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-06 07:51:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-06 07:51:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 92. [2024-11-06 07:51:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-06 07:51:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 128 transitions. [2024-11-06 07:51:15,731 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 128 transitions. Word has length 90 [2024-11-06 07:51:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 07:51:15,732 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 128 transitions. [2024-11-06 07:51:15,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (28), 2 states have call predecessors, (28), 4 states have call successors, (28) [2024-11-06 07:51:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 128 transitions. [2024-11-06 07:51:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-06 07:51:15,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 07:51:15,737 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 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] [2024-11-06 07:51:15,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-06 07:51:15,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-06 07:51:15,938 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 07:51:15,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 07:51:15,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2069857370, now seen corresponding path program 1 times [2024-11-06 07:51:15,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-06 07:51:15,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834715249] [2024-11-06 07:51:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 07:51:15,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-06 07:51:15,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-06 07:51:15,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-06 07:51:15,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-06 07:51:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 07:51:16,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-06 07:51:16,027 INFO L278 TraceCheckSpWp]: Computing forward predicates...