/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.paper_v3.c


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


This is Ultimate 0.2.5-dev-b75d321-m
[2024-11-04 22:23:30,671 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-04 22:23:30,724 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2024-11-04 22:23:30,727 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-04 22:23:30,727 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-04 22:23:30,751 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-04 22:23:30,751 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-04 22:23:30,752 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-04 22:23:30,752 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-11-04 22:23:30,755 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-11-04 22:23:30,755 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-04 22:23:30,755 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-04 22:23:30,756 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-04 22:23:30,756 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-04 22:23:30,756 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-11-04 22:23:30,757 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-04 22:23:30,757 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-04 22:23:30,757 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-04 22:23:30,757 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-04 22:23:30,758 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-04 22:23:30,758 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-04 22:23:30,758 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-04 22:23:30,758 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-11-04 22:23:30,758 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-04 22:23:30,759 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-11-04 22:23:30,759 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-04 22:23:30,759 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-04 22:23:30,759 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-04 22:23:30,759 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-11-04 22:23:30,759 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-04 22:23:30,759 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-04 22:23:30,760 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-04 22:23:30,760 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-04 22:23:30,760 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-04 22:23:30,760 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-04 22:23:30,760 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-11-04 22:23:30,760 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2024-11-04 22:23:30,760 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-04 22:23:30,761 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-11-04 22:23:30,761 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-11-04 22:23:30,761 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-04 22:23:30,762 INFO  L153        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt
[2024-11-04 22:23:30,929 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-04 22:23:30,945 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-04 22:23:30,947 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-04 22:23:30,948 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-04 22:23:30,948 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-04 22:23:30,949 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.paper_v3.c
[2024-11-04 22:23:32,284 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-04 22:23:32,451 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-04 22:23:32,451 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.paper_v3.c
[2024-11-04 22:23:32,457 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda2962ee/46f9c65f4d3647f68e66aea18688c9f6/FLAGcd7ea19e8
[2024-11-04 22:23:32,851 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda2962ee/46f9c65f4d3647f68e66aea18688c9f6
[2024-11-04 22:23:32,853 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-04 22:23:32,855 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-11-04 22:23:32,856 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-04 22:23:32,856 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-04 22:23:32,860 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-04 22:23:32,860 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 10:23:32" (1/1) ...
[2024-11-04 22:23:32,861 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@514cc506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:32, skipping insertion in model container
[2024-11-04 22:23:32,861 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 10:23:32" (1/1) ...
[2024-11-04 22:23:32,881 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-04 22:23:33,034 WARN  L250   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.paper_v3.c[1248,1261]
[2024-11-04 22:23:33,066 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-04 22:23:33,078 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-04 22:23:33,086 WARN  L250   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.paper_v3.c[1248,1261]
[2024-11-04 22:23:33,101 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-04 22:23:33,113 INFO  L204         MainTranslator]: Completed translation
[2024-11-04 22:23:33,114 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33 WrapperNode
[2024-11-04 22:23:33,114 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-04 22:23:33,115 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-04 22:23:33,115 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-04 22:23:33,115 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-04 22:23:33,119 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,129 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,144 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108
[2024-11-04 22:23:33,144 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-04 22:23:33,145 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-04 22:23:33,145 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-04 22:23:33,145 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-04 22:23:33,155 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,156 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,158 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,167 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2024-11-04 22:23:33,167 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,167 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,172 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,174 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,176 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,177 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,179 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-04 22:23:33,179 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-04 22:23:33,179 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-04 22:23:33,179 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-04 22:23:33,180 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (1/1) ...
[2024-11-04 22:23:33,184 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-04 22:23:33,198 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-04 22:23:33,210 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2024-11-04 22:23:33,212 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2024-11-04 22:23:33,231 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-04 22:23:33,231 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-11-04 22:23:33,231 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-04 22:23:33,231 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-04 22:23:33,292 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-04 22:23:33,294 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-04 22:23:33,440 INFO  L?                        ?]: Removed 21 outVars from TransFormulas that were not future-live.
[2024-11-04 22:23:33,440 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-04 22:23:33,451 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-04 22:23:33,451 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-11-04 22:23:33,452 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 10:23:33 BoogieIcfgContainer
[2024-11-04 22:23:33,452 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-04 22:23:33,454 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-04 22:23:33,454 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-04 22:23:33,456 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-04 22:23:33,456 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 10:23:32" (1/3) ...
[2024-11-04 22:23:33,457 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bedf40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 10:23:33, skipping insertion in model container
[2024-11-04 22:23:33,457 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:23:33" (2/3) ...
[2024-11-04 22:23:33,457 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bedf40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 10:23:33, skipping insertion in model container
[2024-11-04 22:23:33,457 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 10:23:33" (3/3) ...
[2024-11-04 22:23:33,458 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.paper_v3.c
[2024-11-04 22:23:33,472 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-04 22:23:33,472 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-04 22:23:33,529 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-04 22:23:33,534 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;@1c8acd4f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-04 22:23:33,534 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-04 22:23:33,539 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)
[2024-11-04 22:23:33,543 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2024-11-04 22:23:33,543 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-04 22:23:33,543 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2024-11-04 22:23:33,544 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-04 22:23:33,548 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-04 22:23:33,548 INFO  L85        PathProgramCache]: Analyzing trace with hash 28694789, now seen corresponding path program 1 times
[2024-11-04 22:23:33,554 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-04 22:23:33,555 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318507830]
[2024-11-04 22:23:33,555 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-04 22:23:33,557 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-04 22:23:33,557 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-04 22:23:33,560 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-04 22:23:33,561 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process
[2024-11-04 22:23:33,650 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-04 22:23:33,652 INFO  L255         TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjuncts are in the unsatisfiable core
[2024-11-04 22:23:33,658 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-04 22:23:33,848 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:23:33,849 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-04 22:23:33,952 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:23:33,953 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-04 22:23:33,953 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318507830]
[2024-11-04 22:23:33,954 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1318507830] provided 2 perfect and 0 imperfect interpolant sequences
[2024-11-04 22:23:33,954 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-11-04 22:23:33,954 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6
[2024-11-04 22:23:33,956 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887711814]
[2024-11-04 22:23:33,956 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-11-04 22:23:33,959 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2024-11-04 22:23:33,959 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-04 22:23:33,976 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2024-11-04 22:23:33,976 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2024-11-04 22:23:33,978 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)
[2024-11-04 22:23:34,013 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-04 22:23:34,014 INFO  L93              Difference]: Finished difference Result 18 states and 23 transitions.
[2024-11-04 22:23:34,015 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-11-04 22:23:34,016 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
[2024-11-04 22:23:34,016 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-04 22:23:34,022 INFO  L225             Difference]: With dead ends: 18
[2024-11-04 22:23:34,022 INFO  L226             Difference]: Without dead ends: 10
[2024-11-04 22:23:34,025 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2024-11-04 22:23:34,028 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
[2024-11-04 22:23:34,029 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]
[2024-11-04 22:23:34,042 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2024-11-04 22:23:34,052 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9.
[2024-11-04 22:23:34,052 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)
[2024-11-04 22:23:34,053 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2024-11-04 22:23:34,054 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5
[2024-11-04 22:23:34,054 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-04 22:23:34,054 INFO  L471      AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2024-11-04 22:23:34,054 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)
[2024-11-04 22:23:34,055 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2024-11-04 22:23:34,055 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2024-11-04 22:23:34,055 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-04 22:23:34,055 INFO  L215           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1]
[2024-11-04 22:23:34,064 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0
[2024-11-04 22:23:34,258 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-04 22:23:34,259 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-04 22:23:34,260 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-04 22:23:34,260 INFO  L85        PathProgramCache]: Analyzing trace with hash 152739811, now seen corresponding path program 1 times
[2024-11-04 22:23:34,260 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-04 22:23:34,260 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797479788]
[2024-11-04 22:23:34,260 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-04 22:23:34,261 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-04 22:23:34,261 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-04 22:23:34,263 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-04 22:23:34,264 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process
[2024-11-04 22:23:34,339 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-04 22:23:34,341 INFO  L255         TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 24 conjuncts are in the unsatisfiable core
[2024-11-04 22:23:34,346 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-04 22:23:34,520 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:23:34,520 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-04 22:23:35,608 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:23:35,609 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-04 22:23:35,610 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797479788]
[2024-11-04 22:23:35,612 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [797479788] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-04 22:23:35,612 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-04 22:23:35,612 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8
[2024-11-04 22:23:35,612 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738706349]
[2024-11-04 22:23:35,612 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-04 22:23:35,613 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2024-11-04 22:23:35,613 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-04 22:23:35,613 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2024-11-04 22:23:35,614 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2024-11-04 22:23:35,614 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)
[2024-11-04 22:23:35,786 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-04 22:23:35,786 INFO  L93              Difference]: Finished difference Result 21 states and 23 transitions.
[2024-11-04 22:23:35,787 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2024-11-04 22:23:35,787 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
[2024-11-04 22:23:35,787 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-04 22:23:35,787 INFO  L225             Difference]: With dead ends: 21
[2024-11-04 22:23:35,787 INFO  L226             Difference]: Without dead ends: 19
[2024-11-04 22:23:35,788 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156
[2024-11-04 22:23:35,789 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-11-04 22:23:35,789 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-04 22:23:35,789 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2024-11-04 22:23:35,793 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18.
[2024-11-04 22:23:35,793 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)
[2024-11-04 22:23:35,794 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions.
[2024-11-04 22:23:35,794 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8
[2024-11-04 22:23:35,794 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-04 22:23:35,795 INFO  L471      AbstractCegarLoop]: Abstraction has 18 states and 18 transitions.
[2024-11-04 22:23:35,795 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)
[2024-11-04 22:23:35,795 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions.
[2024-11-04 22:23:35,795 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2024-11-04 22:23:35,795 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-04 22:23:35,796 INFO  L215           NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1]
[2024-11-04 22:23:35,798 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0
[2024-11-04 22:23:35,997 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-04 22:23:35,999 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-04 22:23:36,000 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-04 22:23:36,001 INFO  L85        PathProgramCache]: Analyzing trace with hash -37306491, now seen corresponding path program 2 times
[2024-11-04 22:23:36,001 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-04 22:23:36,001 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281493695]
[2024-11-04 22:23:36,002 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-04 22:23:36,003 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-04 22:23:36,003 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-04 22:23:36,005 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-04 22:23:36,006 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process
[2024-11-04 22:23:36,136 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-04 22:23:36,144 INFO  L255         TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 30 conjuncts are in the unsatisfiable core
[2024-11-04 22:23:36,149 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-04 22:23:36,487 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:23:36,488 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-04 22:23:44,132 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:23:44,132 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-04 22:23:44,132 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281493695]
[2024-11-04 22:23:44,132 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1281493695] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-04 22:23:44,132 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-04 22:23:44,133 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14
[2024-11-04 22:23:44,133 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604963327]
[2024-11-04 22:23:44,133 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-04 22:23:44,133 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2024-11-04 22:23:44,133 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-04 22:23:44,134 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2024-11-04 22:23:44,134 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182
[2024-11-04 22:23:44,134 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)
[2024-11-04 22:23:45,442 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-04 22:23:45,442 INFO  L93              Difference]: Finished difference Result 39 states and 44 transitions.
[2024-11-04 22:23:45,445 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2024-11-04 22:23:45,445 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
[2024-11-04 22:23:45,445 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-04 22:23:45,445 INFO  L225             Difference]: With dead ends: 39
[2024-11-04 22:23:45,445 INFO  L226             Difference]: Without dead ends: 37
[2024-11-04 22:23:45,446 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756
[2024-11-04 22:23:45,447 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2024-11-04 22:23:45,447 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2024-11-04 22:23:45,448 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2024-11-04 22:23:45,453 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36.
[2024-11-04 22:23:45,453 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 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)
[2024-11-04 22:23:45,454 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions.
[2024-11-04 22:23:45,454 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 17
[2024-11-04 22:23:45,454 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-04 22:23:45,454 INFO  L471      AbstractCegarLoop]: Abstraction has 36 states and 36 transitions.
[2024-11-04 22:23:45,454 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)
[2024-11-04 22:23:45,454 INFO  L276                IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions.
[2024-11-04 22:23:45,455 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2024-11-04 22:23:45,455 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-04 22:23:45,455 INFO  L215           NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1]
[2024-11-04 22:23:45,460 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0
[2024-11-04 22:23:45,655 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-04 22:23:45,656 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-04 22:23:45,656 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-04 22:23:45,657 INFO  L85        PathProgramCache]: Analyzing trace with hash 1864061253, now seen corresponding path program 3 times
[2024-11-04 22:23:45,657 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-04 22:23:45,657 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344409709]
[2024-11-04 22:23:45,657 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-04 22:23:45,657 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-04 22:23:45,657 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-04 22:23:45,659 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-04 22:23:45,660 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process
[2024-11-04 22:23:45,945 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-04 22:23:45,964 INFO  L255         TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjuncts are in the unsatisfiable core
[2024-11-04 22:23:45,973 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-04 22:23:46,557 INFO  L134       CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:23:46,558 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-04 22:25:02,559 INFO  L134       CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:25:02,559 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-04 22:25:02,560 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344409709]
[2024-11-04 22:25:02,560 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [344409709] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-04 22:25:02,560 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-04 22:25:02,560 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26
[2024-11-04 22:25:02,560 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68413092]
[2024-11-04 22:25:02,560 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-04 22:25:02,561 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 26 states
[2024-11-04 22:25:02,561 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-04 22:25:02,565 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants.
[2024-11-04 22:25:02,565 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650
[2024-11-04 22:25:02,565 INFO  L87              Difference]: Start difference. First operand 36 states and 36 transitions. Second operand  has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 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)
[2024-11-04 22:25:15,642 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-04 22:25:15,643 INFO  L93              Difference]: Finished difference Result 75 states and 86 transitions.
[2024-11-04 22:25:15,643 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. 
[2024-11-04 22:25:15,644 INFO  L78                 Accepts]: Start accepts. Automaton has  has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 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 35
[2024-11-04 22:25:15,644 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-04 22:25:15,644 INFO  L225             Difference]: With dead ends: 75
[2024-11-04 22:25:15,645 INFO  L226             Difference]: Without dead ends: 73
[2024-11-04 22:25:15,646 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=1083, Invalid=2223, Unknown=0, NotChecked=0, Total=3306
[2024-11-04 22:25:15,646 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2024-11-04 22:25:15,646 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2024-11-04 22:25:15,647 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2024-11-04 22:25:15,671 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72.
[2024-11-04 22:25:15,673 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 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)
[2024-11-04 22:25:15,674 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions.
[2024-11-04 22:25:15,674 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 35
[2024-11-04 22:25:15,674 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-04 22:25:15,674 INFO  L471      AbstractCegarLoop]: Abstraction has 72 states and 72 transitions.
[2024-11-04 22:25:15,674 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 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)
[2024-11-04 22:25:15,675 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions.
[2024-11-04 22:25:15,675 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 72
[2024-11-04 22:25:15,676 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-04 22:25:15,676 INFO  L215           NwaCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1]
[2024-11-04 22:25:15,681 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0
[2024-11-04 22:25:15,876 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-04 22:25:15,876 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-04 22:25:15,877 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-04 22:25:15,877 INFO  L85        PathProgramCache]: Analyzing trace with hash -1735023419, now seen corresponding path program 4 times
[2024-11-04 22:25:15,877 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-04 22:25:15,877 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264532899]
[2024-11-04 22:25:15,877 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-04 22:25:15,877 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-04 22:25:15,877 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-04 22:25:15,880 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-04 22:25:15,880 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process
[2024-11-04 22:25:16,334 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-04 22:25:16,362 INFO  L255         TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 66 conjuncts are in the unsatisfiable core
[2024-11-04 22:25:16,373 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-04 22:25:17,840 INFO  L134       CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-04 22:25:17,840 INFO  L311         TraceCheckSpWp]: Computing backward predicates...