/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-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/gcd_2.c


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


This is Ultimate 0.2.5-dev-356b6ba-m
[2024-10-31 19:31:17,070 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-10-31 19:31:17,143 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf
[2024-10-31 19:31:17,149 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-10-31 19:31:17,149 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-10-31 19:31:17,194 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-10-31 19:31:17,195 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-10-31 19:31:17,195 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-10-31 19:31:17,196 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-10-31 19:31:17,196 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-10-31 19:31:17,198 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-10-31 19:31:17,199 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-10-31 19:31:17,199 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-10-31 19:31:17,200 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-10-31 19:31:17,201 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-10-31 19:31:17,202 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-10-31 19:31:17,202 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-10-31 19:31:17,203 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-10-31 19:31:17,205 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-10-31 19:31:17,205 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-10-31 19:31:17,206 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-10-31 19:31:17,206 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-10-31 19:31:17,206 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-10-31 19:31:17,206 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-10-31 19:31:17,207 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-10-31 19:31:17,207 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-10-31 19:31:17,207 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-10-31 19:31:17,208 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-10-31 19:31:17,208 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-10-31 19:31:17,208 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-10-31 19:31:17,208 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-10-31 19:31:17,209 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-10-31 19:31:17,209 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-10-31 19:31:17,209 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-10-31 19:31:17,209 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-10-31 19:31:17,210 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-10-31 19:31:17,214 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-10-31 19:31:17,214 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-10-31 19:31:17,214 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-10-31 19:31:17,214 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt
[2024-10-31 19:31:17,215 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-10-31 19:31:17,215 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-10-31 19:31:17,215 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-10-31 19:31:17,215 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-10-31 19:31:17,215 INFO  L153        SettingsManager]:  * Logic for external solver=AUFBV
[2024-10-31 19:31:17,216 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt
[2024-10-31 19:31:17,542 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-10-31 19:31:17,568 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-10-31 19:31:17,571 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-10-31 19:31:17,572 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-10-31 19:31:17,572 INFO  L274        PluginConnector]: CDTParser initialized
[2024-10-31 19:31:17,574 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_2.c
[2024-10-31 19:31:19,083 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-10-31 19:31:19,306 INFO  L384              CDTParser]: Found 1 translation units.
[2024-10-31 19:31:19,307 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_2.c
[2024-10-31 19:31:19,316 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09a4f5e29/8176559f488942e69e2c659180b8e7ce/FLAG161a61429
[2024-10-31 19:31:19,336 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09a4f5e29/8176559f488942e69e2c659180b8e7ce
[2024-10-31 19:31:19,339 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-10-31 19:31:19,340 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-10-31 19:31:19,343 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-10-31 19:31:19,343 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-10-31 19:31:19,349 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-10-31 19:31:19,350 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,351 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393a03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19, skipping insertion in model container
[2024-10-31 19:31:19,351 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,372 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-10-31 19:31:19,545 WARN  L251   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_2.c[664,677]
[2024-10-31 19:31:19,565 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-10-31 19:31:19,578 INFO  L200         MainTranslator]: Completed pre-run
[2024-10-31 19:31:19,592 WARN  L251   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_2.c[664,677]
[2024-10-31 19:31:19,601 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-10-31 19:31:19,622 INFO  L204         MainTranslator]: Completed translation
[2024-10-31 19:31:19,624 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19 WrapperNode
[2024-10-31 19:31:19,624 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-10-31 19:31:19,625 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-10-31 19:31:19,626 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-10-31 19:31:19,626 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-10-31 19:31:19,632 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,641 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,657 INFO  L138                Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53
[2024-10-31 19:31:19,658 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-10-31 19:31:19,660 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-10-31 19:31:19,660 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-10-31 19:31:19,660 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-10-31 19:31:19,670 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,670 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,678 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,688 INFO  L175           MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0].
[2024-10-31 19:31:19,689 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,689 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,693 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,696 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,699 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,700 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,703 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-10-31 19:31:19,705 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-10-31 19:31:19,705 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-10-31 19:31:19,705 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-10-31 19:31:19,706 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (1/1) ...
[2024-10-31 19:31:19,711 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-10-31 19:31:19,721 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-10-31 19:31:19,735 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)
[2024-10-31 19:31:19,740 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
[2024-10-31 19:31:19,770 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-10-31 19:31:19,770 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-10-31 19:31:19,770 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1
[2024-10-31 19:31:19,771 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-10-31 19:31:19,771 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-10-31 19:31:19,836 INFO  L238             CfgBuilder]: Building ICFG
[2024-10-31 19:31:19,838 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-10-31 19:31:20,066 INFO  L?                        ?]: Removed 15 outVars from TransFormulas that were not future-live.
[2024-10-31 19:31:20,066 INFO  L287             CfgBuilder]: Performing block encoding
[2024-10-31 19:31:20,079 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-10-31 19:31:20,080 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-10-31 19:31:20,080 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:31:20 BoogieIcfgContainer
[2024-10-31 19:31:20,081 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-10-31 19:31:20,083 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-10-31 19:31:20,083 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-10-31 19:31:20,087 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-10-31 19:31:20,087 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 07:31:19" (1/3) ...
[2024-10-31 19:31:20,088 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecd6211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:31:20, skipping insertion in model container
[2024-10-31 19:31:20,089 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:31:19" (2/3) ...
[2024-10-31 19:31:20,089 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecd6211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:31:20, skipping insertion in model container
[2024-10-31 19:31:20,089 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:31:20" (3/3) ...
[2024-10-31 19:31:20,091 INFO  L112   eAbstractionObserver]: Analyzing ICFG gcd_2.c
[2024-10-31 19:31:20,106 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-10-31 19:31:20,106 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-10-31 19:31:20,169 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-10-31 19:31:20,177 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;@62a2609a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-10-31 19:31:20,177 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-10-31 19:31:20,182 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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)
[2024-10-31 19:31:20,187 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2024-10-31 19:31:20,187 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 19:31:20,188 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 19:31:20,189 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 19:31:20,194 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 19:31:20,195 INFO  L85        PathProgramCache]: Analyzing trace with hash 777289588, now seen corresponding path program 1 times
[2024-10-31 19:31:20,203 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-10-31 19:31:20,204 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656937823]
[2024-10-31 19:31:20,204 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 19:31:20,206 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-10-31 19:31:20,207 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-10-31 19:31:20,210 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)
[2024-10-31 19:31:20,212 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process
[2024-10-31 19:31:20,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 19:31:20,326 INFO  L255         TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjuncts are in the unsatisfiable core
[2024-10-31 19:31:20,330 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 19:31:20,437 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 19:31:20,437 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-31 19:31:20,474 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 19:31:20,475 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-10-31 19:31:20,476 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656937823]
[2024-10-31 19:31:20,480 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [656937823] provided 2 perfect and 0 imperfect interpolant sequences
[2024-10-31 19:31:20,481 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-10-31 19:31:20,481 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4
[2024-10-31 19:31:20,483 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204813105]
[2024-10-31 19:31:20,483 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-10-31 19:31:20,487 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2024-10-31 19:31:20,488 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-10-31 19:31:20,513 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2024-10-31 19:31:20,513 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2024-10-31 19:31:20,515 INFO  L87              Difference]: Start difference. First operand  has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) Second operand  has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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)
[2024-10-31 19:31:20,562 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 19:31:20,563 INFO  L93              Difference]: Finished difference Result 28 states and 36 transitions.
[2024-10-31 19:31:20,564 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-10-31 19:31:20,565 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) Word has length 10
[2024-10-31 19:31:20,566 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 19:31:20,571 INFO  L225             Difference]: With dead ends: 28
[2024-10-31 19:31:20,571 INFO  L226             Difference]: Without dead ends: 12
[2024-10-31 19:31:20,573 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2024-10-31 19:31:20,579 INFO  L432           NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-10-31 19:31:20,580 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-10-31 19:31:20,593 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2024-10-31 19:31:20,602 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12.
[2024-10-31 19:31:20,603 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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)
[2024-10-31 19:31:20,604 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions.
[2024-10-31 19:31:20,605 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10
[2024-10-31 19:31:20,605 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 19:31:20,605 INFO  L471      AbstractCegarLoop]: Abstraction has 12 states and 14 transitions.
[2024-10-31 19:31:20,606 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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)
[2024-10-31 19:31:20,606 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions.
[2024-10-31 19:31:20,606 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2024-10-31 19:31:20,606 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 19:31:20,606 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 19:31:20,610 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0
[2024-10-31 19:31:20,808 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
[2024-10-31 19:31:20,809 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 19:31:20,810 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 19:31:20,810 INFO  L85        PathProgramCache]: Analyzing trace with hash -1742670346, now seen corresponding path program 1 times
[2024-10-31 19:31:20,810 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-10-31 19:31:20,810 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770286918]
[2024-10-31 19:31:20,811 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 19:31:20,811 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-10-31 19:31:20,811 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-10-31 19:31:20,814 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)
[2024-10-31 19:31:20,815 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process
[2024-10-31 19:31:20,884 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 19:31:20,886 INFO  L255         TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjuncts are in the unsatisfiable core
[2024-10-31 19:31:20,887 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 19:31:20,967 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 19:31:20,967 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-31 19:31:21,048 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 19:31:21,048 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-10-31 19:31:21,048 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770286918]
[2024-10-31 19:31:21,049 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1770286918] provided 2 perfect and 0 imperfect interpolant sequences
[2024-10-31 19:31:21,049 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-10-31 19:31:21,049 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7
[2024-10-31 19:31:21,049 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973141411]
[2024-10-31 19:31:21,049 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-10-31 19:31:21,050 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2024-10-31 19:31:21,051 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-10-31 19:31:21,051 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2024-10-31 19:31:21,051 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2024-10-31 19:31:21,052 INFO  L87              Difference]: Start difference. First operand 12 states and 14 transitions. Second operand  has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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)
[2024-10-31 19:31:21,132 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 19:31:21,132 INFO  L93              Difference]: Finished difference Result 23 states and 26 transitions.
[2024-10-31 19:31:21,133 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-10-31 19:31:21,133 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 10
[2024-10-31 19:31:21,133 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 19:31:21,134 INFO  L225             Difference]: With dead ends: 23
[2024-10-31 19:31:21,134 INFO  L226             Difference]: Without dead ends: 12
[2024-10-31 19:31:21,134 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2024-10-31 19:31:21,136 INFO  L432           NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-10-31 19:31:21,136 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-10-31 19:31:21,137 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2024-10-31 19:31:21,139 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12.
[2024-10-31 19:31:21,139 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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)
[2024-10-31 19:31:21,140 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions.
[2024-10-31 19:31:21,140 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10
[2024-10-31 19:31:21,140 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 19:31:21,141 INFO  L471      AbstractCegarLoop]: Abstraction has 12 states and 13 transitions.
[2024-10-31 19:31:21,141 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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)
[2024-10-31 19:31:21,141 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions.
[2024-10-31 19:31:21,141 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2024-10-31 19:31:21,142 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 19:31:21,142 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 19:31:21,146 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0
[2024-10-31 19:31:21,342 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
[2024-10-31 19:31:21,343 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 19:31:21,343 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 19:31:21,344 INFO  L85        PathProgramCache]: Analyzing trace with hash -881880042, now seen corresponding path program 1 times
[2024-10-31 19:31:21,344 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-10-31 19:31:21,344 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503598632]
[2024-10-31 19:31:21,344 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 19:31:21,344 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-10-31 19:31:21,345 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-10-31 19:31:21,348 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)
[2024-10-31 19:31:21,349 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process
[2024-10-31 19:31:21,466 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 19:31:21,467 INFO  L255         TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 10 conjuncts are in the unsatisfiable core
[2024-10-31 19:31:21,469 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 19:31:21,620 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 19:31:21,620 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-31 19:31:21,825 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 19:31:21,825 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-10-31 19:31:21,826 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503598632]
[2024-10-31 19:31:21,826 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1503598632] provided 0 perfect and 2 imperfect interpolant sequences
[2024-10-31 19:31:21,826 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-10-31 19:31:21,826 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14
[2024-10-31 19:31:21,826 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991035734]
[2024-10-31 19:31:21,827 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-10-31 19:31:21,827 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2024-10-31 19:31:21,827 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-10-31 19:31:21,828 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2024-10-31 19:31:21,832 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182
[2024-10-31 19:31:21,832 INFO  L87              Difference]: Start difference. First operand 12 states and 13 transitions. Second operand  has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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)
[2024-10-31 19:31:22,311 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-31 19:31:22,312 INFO  L93              Difference]: Finished difference Result 24 states and 27 transitions.
[2024-10-31 19:31:22,314 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2024-10-31 19:31:22,314 INFO  L78                 Accepts]: Start accepts. Automaton has  has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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
[2024-10-31 19:31:22,314 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-31 19:31:22,315 INFO  L225             Difference]: With dead ends: 24
[2024-10-31 19:31:22,315 INFO  L226             Difference]: Without dead ends: 15
[2024-10-31 19:31:22,315 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240
[2024-10-31 19:31:22,317 INFO  L432           NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2024-10-31 19:31:22,319 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 41 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2024-10-31 19:31:22,319 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2024-10-31 19:31:22,324 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2024-10-31 19:31:22,324 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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)
[2024-10-31 19:31:22,325 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2024-10-31 19:31:22,325 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11
[2024-10-31 19:31:22,325 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-31 19:31:22,325 INFO  L471      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2024-10-31 19:31:22,325 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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)
[2024-10-31 19:31:22,325 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2024-10-31 19:31:22,326 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2024-10-31 19:31:22,326 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-31 19:31:22,326 INFO  L215           NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-10-31 19:31:22,335 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0
[2024-10-31 19:31:22,527 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
[2024-10-31 19:31:22,527 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-31 19:31:22,528 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-31 19:31:22,528 INFO  L85        PathProgramCache]: Analyzing trace with hash 1172798966, now seen corresponding path program 2 times
[2024-10-31 19:31:22,528 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-10-31 19:31:22,528 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723474665]
[2024-10-31 19:31:22,529 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-31 19:31:22,529 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-10-31 19:31:22,529 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-10-31 19:31:22,532 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)
[2024-10-31 19:31:22,533 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process
[2024-10-31 19:31:23,199 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-31 19:31:23,200 WARN  L253         TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 27 conjuncts are in the unsatisfiable core
[2024-10-31 19:31:23,204 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-31 19:32:22,715 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-31 19:32:22,715 INFO  L311         TraceCheckSpWp]: Computing backward predicates...