/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 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c


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


This is Ultimate 0.2.5-dev-b75d321-m
[2024-11-04 22:04:14,490 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-04 22:04:14,556 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2024-11-04 22:04:14,562 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-04 22:04:14,562 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-04 22:04:14,584 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-04 22:04:14,585 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-04 22:04:14,585 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-04 22:04:14,586 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-11-04 22:04:14,587 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-11-04 22:04:14,587 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-04 22:04:14,588 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-04 22:04:14,589 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-04 22:04:14,589 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-04 22:04:14,589 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-11-04 22:04:14,590 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-04 22:04:14,590 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-04 22:04:14,590 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-04 22:04:14,590 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-04 22:04:14,591 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-04 22:04:14,591 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-04 22:04:14,594 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-04 22:04:14,594 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-11-04 22:04:14,594 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-04 22:04:14,595 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-11-04 22:04:14,595 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-04 22:04:14,595 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-04 22:04:14,595 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-04 22:04:14,595 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-11-04 22:04:14,595 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-04 22:04:14,596 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-04 22:04:14,596 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-04 22:04:14,596 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-04 22:04:14,596 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-04 22:04:14,596 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-04 22:04:14,596 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-11-04 22:04:14,597 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2024-11-04 22:04:14,597 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-04 22:04:14,597 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-11-04 22:04:14,600 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-11-04 22:04:14,600 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-04 22:04:14,600 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt
[2024-11-04 22:04:14,812 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-04 22:04:14,842 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-04 22:04:14,846 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-04 22:04:14,847 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-04 22:04:14,848 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-04 22:04:14,850 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c
[2024-11-04 22:04:16,333 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-04 22:04:16,643 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-04 22:04:16,644 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c
[2024-11-04 22:04:16,674 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef798417f/28432481d965406b806a4e84239bc1e1/FLAGdc7775ec4
[2024-11-04 22:04:16,692 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef798417f/28432481d965406b806a4e84239bc1e1
[2024-11-04 22:04:16,695 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-04 22:04:16,696 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-11-04 22:04:16,697 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-04 22:04:16,697 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-04 22:04:16,708 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-04 22:04:16,709 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 10:04:16" (1/1) ...
[2024-11-04 22:04:16,710 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af779ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:16, skipping insertion in model container
[2024-11-04 22:04:16,710 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 10:04:16" (1/1) ...
[2024-11-04 22:04:16,777 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-04 22:04:16,998 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.h_Vsa16.c[1247,1260]
[2024-11-04 22:04:17,323 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-04 22:04:17,337 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-04 22:04:17,348 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.h_Vsa16.c[1247,1260]
[2024-11-04 22:04:17,481 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-04 22:04:17,496 INFO  L204         MainTranslator]: Completed translation
[2024-11-04 22:04:17,498 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17 WrapperNode
[2024-11-04 22:04:17,499 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-04 22:04:17,500 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-04 22:04:17,500 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-04 22:04:17,500 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-04 22:04:17,514 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,580 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,679 INFO  L138                Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2537
[2024-11-04 22:04:17,680 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-04 22:04:17,681 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-04 22:04:17,681 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-04 22:04:17,681 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-04 22:04:17,690 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,690 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,707 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,768 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].
[2024-11-04 22:04:17,768 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,768 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,822 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,831 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,849 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,864 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,884 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-04 22:04:17,886 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-04 22:04:17,887 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-04 22:04:17,887 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-04 22:04:17,888 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (1/1) ...
[2024-11-04 22:04:17,893 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-04 22:04:17,903 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-04 22:04:17,921 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)
[2024-11-04 22:04:17,933 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
[2024-11-04 22:04:17,957 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-04 22:04:17,958 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-11-04 22:04:17,958 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-04 22:04:17,958 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-04 22:04:17,958 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2024-11-04 22:04:17,958 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2024-11-04 22:04:18,280 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-04 22:04:18,282 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-04 22:04:20,903 INFO  L?                        ?]: Removed 244 outVars from TransFormulas that were not future-live.
[2024-11-04 22:04:20,903 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-04 22:04:20,927 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-04 22:04:20,927 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-11-04 22:04:20,927 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 10:04:20 BoogieIcfgContainer
[2024-11-04 22:04:20,928 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-04 22:04:20,932 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-04 22:04:20,932 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-04 22:04:20,935 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-04 22:04:20,939 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 10:04:16" (1/3) ...
[2024-11-04 22:04:20,940 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424d0694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 10:04:20, skipping insertion in model container
[2024-11-04 22:04:20,940 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:04:17" (2/3) ...
[2024-11-04 22:04:20,941 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424d0694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 10:04:20, skipping insertion in model container
[2024-11-04 22:04:20,941 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 10:04:20" (3/3) ...
[2024-11-04 22:04:20,942 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Vsa16.c
[2024-11-04 22:04:20,955 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-04 22:04:20,956 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-04 22:04:20,998 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-04 22:04:21,003 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;@4d35fe03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-04 22:04:21,003 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-04 22:04:21,006 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2024-11-04 22:04:21,010 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2024-11-04 22:04:21,010 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-04 22:04:21,011 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2024-11-04 22:04:21,011 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-04 22:04:21,015 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-04 22:04:21,015 INFO  L85        PathProgramCache]: Analyzing trace with hash 1806584026, now seen corresponding path program 1 times
[2024-11-04 22:04:21,021 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-04 22:04:21,021 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063643348]
[2024-11-04 22:04:21,021 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-04 22:04:21,023 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-04 22:04:21,023 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-04 22:04:21,025 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-04 22:04:21,027 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process
[2024-11-04 22:04:21,587 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-04 22:04:21,596 INFO  L255         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 32 conjuncts are in the unsatisfiable core
[2024-11-04 22:04:21,609 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-04 22:04:21,838 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:04:21,838 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-04 22:04:22,154 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:04:22,156 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-04 22:04:22,156 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063643348]
[2024-11-04 22:04:22,157 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [2063643348] provided 2 perfect and 0 imperfect interpolant sequences
[2024-11-04 22:04:22,157 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-11-04 22:04:22,157 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10
[2024-11-04 22:04:22,160 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064383359]
[2024-11-04 22:04:22,161 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-11-04 22:04:22,168 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2024-11-04 22:04:22,169 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-04 22:04:22,194 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2024-11-04 22:04:22,195 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2024-11-04 22:04:22,197 INFO  L87              Difference]: Start difference. First operand  has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand  has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-04 22:04:22,591 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-04 22:04:22,592 INFO  L93              Difference]: Finished difference Result 48 states and 70 transitions.
[2024-11-04 22:04:22,594 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-11-04 22:04:22,595 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7
[2024-11-04 22:04:22,596 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-04 22:04:22,601 INFO  L225             Difference]: With dead ends: 48
[2024-11-04 22:04:22,601 INFO  L226             Difference]: Without dead ends: 30
[2024-11-04 22:04:22,608 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2024-11-04 22:04:22,615 INFO  L432           NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2024-11-04 22:04:22,616 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 82 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2024-11-04 22:04:22,637 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2024-11-04 22:04:22,651 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23.
[2024-11-04 22:04:22,652 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5)
[2024-11-04 22:04:22,653 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions.
[2024-11-04 22:04:22,654 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 7
[2024-11-04 22:04:22,654 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-04 22:04:22,654 INFO  L471      AbstractCegarLoop]: Abstraction has 23 states and 26 transitions.
[2024-11-04 22:04:22,655 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-04 22:04:22,655 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions.
[2024-11-04 22:04:22,655 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2024-11-04 22:04:22,655 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-04 22:04:22,655 INFO  L215           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-04 22:04:22,677 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0
[2024-11-04 22:04:22,856 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-04 22:04:22,858 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-04 22:04:22,859 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-04 22:04:22,859 INFO  L85        PathProgramCache]: Analyzing trace with hash -2036583178, now seen corresponding path program 1 times
[2024-11-04 22:04:22,859 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-04 22:04:22,860 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985839712]
[2024-11-04 22:04:22,860 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-04 22:04:22,862 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-04 22:04:22,862 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-04 22:04:22,865 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-04 22:04:22,867 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process
[2024-11-04 22:04:23,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-04 22:04:23,377 INFO  L255         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjuncts are in the unsatisfiable core
[2024-11-04 22:04:23,386 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-04 22:04:23,476 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:04:23,476 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-04 22:04:23,777 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:04:23,778 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-04 22:04:23,778 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985839712]
[2024-11-04 22:04:23,778 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1985839712] provided 2 perfect and 0 imperfect interpolant sequences
[2024-11-04 22:04:23,778 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-11-04 22:04:23,778 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10
[2024-11-04 22:04:23,778 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102509770]
[2024-11-04 22:04:23,779 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-11-04 22:04:23,780 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2024-11-04 22:04:23,780 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-04 22:04:23,780 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2024-11-04 22:04:23,781 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2024-11-04 22:04:23,781 INFO  L87              Difference]: Start difference. First operand 23 states and 26 transitions. Second operand  has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2024-11-04 22:04:24,002 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-04 22:04:24,002 INFO  L93              Difference]: Finished difference Result 36 states and 41 transitions.
[2024-11-04 22:04:24,004 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-11-04 22:04:24,004 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13
[2024-11-04 22:04:24,004 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-04 22:04:24,005 INFO  L225             Difference]: With dead ends: 36
[2024-11-04 22:04:24,005 INFO  L226             Difference]: Without dead ends: 34
[2024-11-04 22:04:24,005 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2024-11-04 22:04:24,006 INFO  L432           NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2024-11-04 22:04:24,006 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 83 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2024-11-04 22:04:24,007 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2024-11-04 22:04:24,011 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29.
[2024-11-04 22:04:24,011 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6)
[2024-11-04 22:04:24,011 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions.
[2024-11-04 22:04:24,012 INFO  L78                 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 13
[2024-11-04 22:04:24,012 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-04 22:04:24,012 INFO  L471      AbstractCegarLoop]: Abstraction has 29 states and 32 transitions.
[2024-11-04 22:04:24,012 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2024-11-04 22:04:24,012 INFO  L276                IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions.
[2024-11-04 22:04:24,012 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2024-11-04 22:04:24,012 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-04 22:04:24,012 INFO  L215           NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-04 22:04:24,021 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0
[2024-11-04 22:04:24,213 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-04 22:04:24,214 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-04 22:04:24,215 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-04 22:04:24,215 INFO  L85        PathProgramCache]: Analyzing trace with hash 119432464, now seen corresponding path program 1 times
[2024-11-04 22:04:24,215 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-04 22:04:24,215 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493861661]
[2024-11-04 22:04:24,216 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-04 22:04:24,216 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-04 22:04:24,216 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-04 22:04:24,218 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)
[2024-11-04 22:04:24,219 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process
[2024-11-04 22:04:24,748 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-04 22:04:24,757 INFO  L255         TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjuncts are in the unsatisfiable core
[2024-11-04 22:04:24,765 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-04 22:04:24,855 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-11-04 22:04:24,855 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-04 22:04:25,009 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-11-04 22:04:25,009 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-04 22:04:25,009 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493861661]
[2024-11-04 22:04:25,009 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1493861661] provided 2 perfect and 0 imperfect interpolant sequences
[2024-11-04 22:04:25,009 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-11-04 22:04:25,010 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10
[2024-11-04 22:04:25,010 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255272396]
[2024-11-04 22:04:25,010 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-11-04 22:04:25,010 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2024-11-04 22:04:25,010 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-04 22:04:25,011 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2024-11-04 22:04:25,011 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2024-11-04 22:04:25,011 INFO  L87              Difference]: Start difference. First operand 29 states and 32 transitions. Second operand  has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2024-11-04 22:04:25,267 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-04 22:04:25,267 INFO  L93              Difference]: Finished difference Result 40 states and 44 transitions.
[2024-11-04 22:04:25,268 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-11-04 22:04:25,269 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19
[2024-11-04 22:04:25,269 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-04 22:04:25,270 INFO  L225             Difference]: With dead ends: 40
[2024-11-04 22:04:25,270 INFO  L226             Difference]: Without dead ends: 38
[2024-11-04 22:04:25,270 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2024-11-04 22:04:25,271 INFO  L432           NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2024-11-04 22:04:25,271 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 76 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2024-11-04 22:04:25,272 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2024-11-04 22:04:25,276 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35.
[2024-11-04 22:04:25,276 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7)
[2024-11-04 22:04:25,277 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions.
[2024-11-04 22:04:25,277 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19
[2024-11-04 22:04:25,277 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-04 22:04:25,278 INFO  L471      AbstractCegarLoop]: Abstraction has 35 states and 38 transitions.
[2024-11-04 22:04:25,278 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2024-11-04 22:04:25,278 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions.
[2024-11-04 22:04:25,278 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2024-11-04 22:04:25,278 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-04 22:04:25,279 INFO  L215           NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-04 22:04:25,288 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0
[2024-11-04 22:04:25,479 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-04 22:04:25,480 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-04 22:04:25,480 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-04 22:04:25,480 INFO  L85        PathProgramCache]: Analyzing trace with hash 740647592, now seen corresponding path program 1 times
[2024-11-04 22:04:25,480 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-04 22:04:25,481 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792487200]
[2024-11-04 22:04:25,481 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-04 22:04:25,481 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-04 22:04:25,481 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-04 22:04:25,483 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-04 22:04:25,485 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process
[2024-11-04 22:04:26,053 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-04 22:04:26,080 INFO  L255         TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 66 conjuncts are in the unsatisfiable core
[2024-11-04 22:04:26,090 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-04 22:04:26,575 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2024-11-04 22:04:26,575 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-04 22:04:40,410 WARN  L286               SmtUtils]: Spent 6.90s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2024-11-04 22:05:16,826 WARN  L286               SmtUtils]: Spent 6.32s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2024-11-04 22:05:16,894 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2024-11-04 22:05:16,894 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-04 22:05:16,894 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792487200]
[2024-11-04 22:05:16,894 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1792487200] provided 2 perfect and 0 imperfect interpolant sequences
[2024-11-04 22:05:16,894 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-11-04 22:05:16,894 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14
[2024-11-04 22:05:16,895 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686361559]
[2024-11-04 22:05:16,895 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-11-04 22:05:16,895 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2024-11-04 22:05:16,895 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-04 22:05:16,896 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2024-11-04 22:05:16,896 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=149, Unknown=1, NotChecked=0, Total=182
[2024-11-04 22:05:16,896 INFO  L87              Difference]: Start difference. First operand 35 states and 38 transitions. Second operand  has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2024-11-04 22:05:23,912 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-04 22:05:23,912 INFO  L93              Difference]: Finished difference Result 44 states and 47 transitions.
[2024-11-04 22:05:23,913 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2024-11-04 22:05:23,913 INFO  L78                 Accepts]: Start accepts. Automaton has  has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 25
[2024-11-04 22:05:23,913 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-04 22:05:23,914 INFO  L225             Difference]: With dead ends: 44
[2024-11-04 22:05:23,914 INFO  L226             Difference]: Without dead ends: 42
[2024-11-04 22:05:23,914 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=59, Invalid=246, Unknown=1, NotChecked=0, Total=306
[2024-11-04 22:05:23,915 INFO  L432           NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time
[2024-11-04 22:05:23,915 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 119 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time]
[2024-11-04 22:05:23,916 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2024-11-04 22:05:23,924 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41.
[2024-11-04 22:05:23,924 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8)
[2024-11-04 22:05:23,925 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions.
[2024-11-04 22:05:23,925 INFO  L78                 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 25
[2024-11-04 22:05:23,925 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-04 22:05:23,925 INFO  L471      AbstractCegarLoop]: Abstraction has 41 states and 44 transitions.
[2024-11-04 22:05:23,926 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2024-11-04 22:05:23,926 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions.
[2024-11-04 22:05:23,926 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2024-11-04 22:05:23,926 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-04 22:05:23,926 INFO  L215           NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-04 22:05:23,935 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0
[2024-11-04 22:05:24,127 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-04 22:05:24,127 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-04 22:05:24,128 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-04 22:05:24,128 INFO  L85        PathProgramCache]: Analyzing trace with hash 1128539662, now seen corresponding path program 1 times
[2024-11-04 22:05:24,128 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-04 22:05:24,128 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104375161]
[2024-11-04 22:05:24,128 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-04 22:05:24,128 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-04 22:05:24,129 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-04 22:05:24,131 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)
[2024-11-04 22:05:24,133 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process
[2024-11-04 22:05:25,174 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-04 22:05:25,233 INFO  L255         TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 40 conjuncts are in the unsatisfiable core
[2024-11-04 22:05:25,245 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-04 22:05:32,944 INFO  L134       CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2024-11-04 22:05:32,944 INFO  L311         TraceCheckSpWp]: Computing backward predicates...