/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.vcegar_QF_BV_itc99_b13_p07.c


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


This is Ultimate 0.2.5-dev-356b6ba-m
[2024-11-01 09:52:53,333 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-01 09:52:53,413 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2024-11-01 09:52:53,419 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-01 09:52:53,420 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-01 09:52:53,460 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-01 09:52:53,461 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-01 09:52:53,461 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-01 09:52:53,462 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-11-01 09:52:53,462 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-11-01 09:52:53,463 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-01 09:52:53,464 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-01 09:52:53,464 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-01 09:52:53,466 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-01 09:52:53,466 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-11-01 09:52:53,466 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-01 09:52:53,467 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-01 09:52:53,467 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-01 09:52:53,467 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-01 09:52:53,468 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-01 09:52:53,468 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-01 09:52:53,468 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-01 09:52:53,469 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-11-01 09:52:53,469 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-01 09:52:53,469 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-11-01 09:52:53,470 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-01 09:52:53,470 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-01 09:52:53,470 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-01 09:52:53,470 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-11-01 09:52:53,471 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-01 09:52:53,471 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-01 09:52:53,471 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-01 09:52:53,472 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-01 09:52:53,472 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-01 09:52:53,473 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-01 09:52:53,474 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-11-01 09:52:53,474 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2024-11-01 09:52:53,474 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-01 09:52:53,474 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-11-01 09:52:53,475 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-11-01 09:52:53,475 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-01 09:52:53,476 INFO  L153        SettingsManager]:  * Logic for external solver=AUFBV
[2024-11-01 09:52:53,476 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt
[2024-11-01 09:52:53,777 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-01 09:52:53,800 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-01 09:52:53,803 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-01 09:52:53,804 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-01 09:52:53,804 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-01 09:52:53,806 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p07.c
[2024-11-01 09:52:55,323 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-01 09:52:55,538 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-01 09:52:55,539 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p07.c
[2024-11-01 09:52:55,548 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d3cf1831/d292e3e804324256813470776977bb3e/FLAGa8d7330de
[2024-11-01 09:52:55,912 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d3cf1831/d292e3e804324256813470776977bb3e
[2024-11-01 09:52:55,914 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-01 09:52:55,915 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-11-01 09:52:55,916 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-01 09:52:55,916 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-01 09:52:55,921 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-01 09:52:55,921 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 09:52:55" (1/1) ...
[2024-11-01 09:52:55,922 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b17e7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:55, skipping insertion in model container
[2024-11-01 09:52:55,922 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 09:52:55" (1/1) ...
[2024-11-01 09:52:55,946 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-01 09:52:56,132 WARN  L251   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p07.c[1266,1279]
[2024-11-01 09:52:56,215 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-01 09:52:56,232 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-01 09:52:56,246 WARN  L251   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p07.c[1266,1279]
[2024-11-01 09:52:56,301 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-01 09:52:56,321 INFO  L204         MainTranslator]: Completed translation
[2024-11-01 09:52:56,323 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56 WrapperNode
[2024-11-01 09:52:56,323 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-01 09:52:56,325 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-01 09:52:56,325 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-01 09:52:56,325 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-01 09:52:56,331 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,343 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,375 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 266
[2024-11-01 09:52:56,376 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-01 09:52:56,380 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-01 09:52:56,381 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-01 09:52:56,381 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-01 09:52:56,391 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,391 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,400 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,424 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2024-11-01 09:52:56,425 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,425 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,438 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,442 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,444 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,445 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,450 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-01 09:52:56,455 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-01 09:52:56,455 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-01 09:52:56,455 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-01 09:52:56,456 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (1/1) ...
[2024-11-01 09:52:56,462 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-01 09:52:56,471 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-01 09:52:56,484 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2024-11-01 09:52:56,491 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2024-11-01 09:52:56,509 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-01 09:52:56,509 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-11-01 09:52:56,509 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-01 09:52:56,509 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-01 09:52:56,616 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-01 09:52:56,618 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-01 09:52:56,903 INFO  L?                        ?]: Removed 43 outVars from TransFormulas that were not future-live.
[2024-11-01 09:52:56,904 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-01 09:52:56,921 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-01 09:52:56,921 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-11-01 09:52:56,921 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 09:52:56 BoogieIcfgContainer
[2024-11-01 09:52:56,921 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-01 09:52:56,923 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-01 09:52:56,923 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-01 09:52:56,925 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-01 09:52:56,926 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.11 09:52:55" (1/3) ...
[2024-11-01 09:52:56,926 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12798177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 09:52:56, skipping insertion in model container
[2024-11-01 09:52:56,926 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:52:56" (2/3) ...
[2024-11-01 09:52:56,927 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12798177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 09:52:56, skipping insertion in model container
[2024-11-01 09:52:56,927 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 09:52:56" (3/3) ...
[2024-11-01 09:52:56,928 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p07.c
[2024-11-01 09:52:56,941 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-01 09:52:56,941 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-01 09:52:57,008 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-01 09:52:57,018 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;@619bad7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-01 09:52:57,018 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-01 09:52:57,026 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 10 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:52:57,033 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2024-11-01 09:52:57,033 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 09:52:57,034 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2024-11-01 09:52:57,034 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 09:52:57,041 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 09:52:57,042 INFO  L85        PathProgramCache]: Analyzing trace with hash 28694789, now seen corresponding path program 1 times
[2024-11-01 09:52:57,051 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 09:52:57,052 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863839564]
[2024-11-01 09:52:57,053 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 09:52:57,054 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-01 09:52:57,055 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-01 09:52:57,058 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)
[2024-11-01 09:52:57,076 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process
[2024-11-01 09:52:57,258 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 09:52:57,269 INFO  L255         TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjuncts are in the unsatisfiable core
[2024-11-01 09:52:57,286 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 09:52:57,465 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:52:57,466 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-01 09:52:57,620 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:52:57,621 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-01 09:52:57,622 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863839564]
[2024-11-01 09:52:57,622 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1863839564] provided 2 perfect and 0 imperfect interpolant sequences
[2024-11-01 09:52:57,622 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-11-01 09:52:57,623 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6
[2024-11-01 09:52:57,625 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305346736]
[2024-11-01 09:52:57,625 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-11-01 09:52:57,629 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2024-11-01 09:52:57,629 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-01 09:52:57,652 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2024-11-01 09:52:57,652 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2024-11-01 09:52:57,654 INFO  L87              Difference]: Start difference. First operand  has 10 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:52:57,709 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-01 09:52:57,709 INFO  L93              Difference]: Finished difference Result 18 states and 23 transitions.
[2024-11-01 09:52:57,711 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-11-01 09:52:57,712 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5
[2024-11-01 09:52:57,713 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-01 09:52:57,719 INFO  L225             Difference]: With dead ends: 18
[2024-11-01 09:52:57,719 INFO  L226             Difference]: Without dead ends: 10
[2024-11-01 09:52:57,721 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2024-11-01 09:52:57,725 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-11-01 09:52:57,726 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-01 09:52:57,742 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2024-11-01 09:52:57,751 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9.
[2024-11-01 09:52:57,752 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:52:57,753 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2024-11-01 09:52:57,754 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5
[2024-11-01 09:52:57,754 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-01 09:52:57,754 INFO  L471      AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2024-11-01 09:52:57,755 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:52:57,755 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2024-11-01 09:52:57,755 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2024-11-01 09:52:57,756 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 09:52:57,756 INFO  L215           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1]
[2024-11-01 09:52:57,759 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0
[2024-11-01 09:52:57,958 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
[2024-11-01 09:52:57,959 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 09:52:57,960 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 09:52:57,960 INFO  L85        PathProgramCache]: Analyzing trace with hash 152739811, now seen corresponding path program 1 times
[2024-11-01 09:52:57,960 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 09:52:57,960 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159221728]
[2024-11-01 09:52:57,960 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 09:52:57,961 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-01 09:52:57,961 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-01 09:52:57,963 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)
[2024-11-01 09:52:57,964 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process
[2024-11-01 09:52:58,158 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 09:52:58,167 INFO  L255         TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjuncts are in the unsatisfiable core
[2024-11-01 09:52:58,172 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 09:52:58,335 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:52:58,336 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-01 09:52:58,749 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:52:58,749 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-01 09:52:58,749 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159221728]
[2024-11-01 09:52:58,749 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [159221728] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-01 09:52:58,749 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-01 09:52:58,750 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8
[2024-11-01 09:52:58,750 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658280362]
[2024-11-01 09:52:58,750 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-01 09:52:58,751 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2024-11-01 09:52:58,752 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-01 09:52:58,753 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2024-11-01 09:52:58,753 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2024-11-01 09:52:58,753 INFO  L87              Difference]: Start difference. First operand 9 states and 9 transitions. Second operand  has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:52:58,821 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-01 09:52:58,821 INFO  L93              Difference]: Finished difference Result 15 states and 15 transitions.
[2024-11-01 09:52:58,822 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-11-01 09:52:58,822 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2024-11-01 09:52:58,823 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-01 09:52:58,823 INFO  L225             Difference]: With dead ends: 15
[2024-11-01 09:52:58,823 INFO  L226             Difference]: Without dead ends: 13
[2024-11-01 09:52:58,823 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90
[2024-11-01 09:52:58,824 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-11-01 09:52:58,825 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-01 09:52:58,828 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2024-11-01 09:52:58,830 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12.
[2024-11-01 09:52:58,831 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:52:58,831 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions.
[2024-11-01 09:52:58,831 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8
[2024-11-01 09:52:58,832 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-01 09:52:58,832 INFO  L471      AbstractCegarLoop]: Abstraction has 12 states and 12 transitions.
[2024-11-01 09:52:58,832 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:52:58,832 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions.
[2024-11-01 09:52:58,833 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2024-11-01 09:52:58,833 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 09:52:58,833 INFO  L215           NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1]
[2024-11-01 09:52:58,837 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0
[2024-11-01 09:52:59,033 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
[2024-11-01 09:52:59,034 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 09:52:59,035 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 09:52:59,035 INFO  L85        PathProgramCache]: Analyzing trace with hash 1906115653, now seen corresponding path program 2 times
[2024-11-01 09:52:59,035 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 09:52:59,035 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981966913]
[2024-11-01 09:52:59,035 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 09:52:59,036 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-01 09:52:59,036 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-01 09:52:59,038 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)
[2024-11-01 09:52:59,040 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process
[2024-11-01 09:52:59,254 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 09:52:59,257 INFO  L255         TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjuncts are in the unsatisfiable core
[2024-11-01 09:52:59,262 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 09:52:59,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:52:59,516 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-01 09:53:02,604 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:53:02,604 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-01 09:53:02,604 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981966913]
[2024-11-01 09:53:02,605 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [981966913] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-01 09:53:02,605 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-01 09:53:02,605 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10
[2024-11-01 09:53:02,605 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065746981]
[2024-11-01 09:53:02,605 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-01 09:53:02,606 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2024-11-01 09:53:02,606 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-01 09:53:02,608 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2024-11-01 09:53:02,609 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90
[2024-11-01 09:53:02,609 INFO  L87              Difference]: Start difference. First operand 12 states and 12 transitions. Second operand  has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:53:02,914 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-01 09:53:02,914 INFO  L93              Difference]: Finished difference Result 21 states and 22 transitions.
[2024-11-01 09:53:02,915 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2024-11-01 09:53:02,915 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11
[2024-11-01 09:53:02,915 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-01 09:53:02,916 INFO  L225             Difference]: With dead ends: 21
[2024-11-01 09:53:02,916 INFO  L226             Difference]: Without dead ends: 19
[2024-11-01 09:53:02,916 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210
[2024-11-01 09:53:02,917 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-01 09:53:02,918 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-01 09:53:02,918 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2024-11-01 09:53:02,921 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18.
[2024-11-01 09:53:02,922 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:53:02,922 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions.
[2024-11-01 09:53:02,922 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11
[2024-11-01 09:53:02,922 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-01 09:53:02,923 INFO  L471      AbstractCegarLoop]: Abstraction has 18 states and 18 transitions.
[2024-11-01 09:53:02,923 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:53:02,923 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions.
[2024-11-01 09:53:02,923 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2024-11-01 09:53:02,923 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 09:53:02,924 INFO  L215           NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1]
[2024-11-01 09:53:02,929 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0
[2024-11-01 09:53:03,124 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
[2024-11-01 09:53:03,125 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 09:53:03,126 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 09:53:03,126 INFO  L85        PathProgramCache]: Analyzing trace with hash -37306491, now seen corresponding path program 3 times
[2024-11-01 09:53:03,126 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 09:53:03,126 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560544833]
[2024-11-01 09:53:03,126 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 09:53:03,126 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-01 09:53:03,126 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-01 09:53:03,129 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)
[2024-11-01 09:53:03,130 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process
[2024-11-01 09:53:03,442 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 09:53:03,468 INFO  L255         TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 47 conjuncts are in the unsatisfiable core
[2024-11-01 09:53:03,476 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 09:53:04,062 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:53:04,062 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-01 09:53:40,660 WARN  L286               SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 470 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2024-11-01 09:54:18,074 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:54:18,075 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-01 09:54:18,075 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560544833]
[2024-11-01 09:54:18,075 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [560544833] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-01 09:54:18,075 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-01 09:54:18,075 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14
[2024-11-01 09:54:18,075 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211800870]
[2024-11-01 09:54:18,075 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-01 09:54:18,076 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2024-11-01 09:54:18,076 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-01 09:54:18,077 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2024-11-01 09:54:18,077 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182
[2024-11-01 09:54:18,077 INFO  L87              Difference]: Start difference. First operand 18 states and 18 transitions. Second operand  has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:54:18,278 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-01 09:54:18,279 INFO  L93              Difference]: Finished difference Result 24 states and 24 transitions.
[2024-11-01 09:54:18,280 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2024-11-01 09:54:18,280 INFO  L78                 Accepts]: Start accepts. Automaton has  has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17
[2024-11-01 09:54:18,281 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-01 09:54:18,281 INFO  L225             Difference]: With dead ends: 24
[2024-11-01 09:54:18,281 INFO  L226             Difference]: Without dead ends: 22
[2024-11-01 09:54:18,282 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342
[2024-11-01 09:54:18,283 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-01 09:54:18,283 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-01 09:54:18,284 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2024-11-01 09:54:18,287 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21.
[2024-11-01 09:54:18,287 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:54:18,288 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions.
[2024-11-01 09:54:18,288 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17
[2024-11-01 09:54:18,288 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-01 09:54:18,288 INFO  L471      AbstractCegarLoop]: Abstraction has 21 states and 21 transitions.
[2024-11-01 09:54:18,289 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:54:18,289 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions.
[2024-11-01 09:54:18,289 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2024-11-01 09:54:18,289 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 09:54:18,289 INFO  L215           NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1]
[2024-11-01 09:54:18,294 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0
[2024-11-01 09:54:18,490 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
[2024-11-01 09:54:18,490 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 09:54:18,491 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 09:54:18,491 INFO  L85        PathProgramCache]: Analyzing trace with hash 1003628899, now seen corresponding path program 4 times
[2024-11-01 09:54:18,491 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 09:54:18,491 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607443868]
[2024-11-01 09:54:18,491 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 09:54:18,491 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-01 09:54:18,492 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-01 09:54:18,493 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)
[2024-11-01 09:54:18,494 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process
[2024-11-01 09:54:18,791 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 09:54:18,825 INFO  L255         TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 53 conjuncts are in the unsatisfiable core
[2024-11-01 09:54:18,832 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 09:54:19,302 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:54:19,303 INFO  L311         TraceCheckSpWp]: Computing backward predicates...