/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.trace.refinement.strategy FOX -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.cav14_example.c


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


This is Ultimate 0.2.5-dev-17387ad-m
[2024-11-06 15:20:18,302 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-06 15:20:18,376 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2024-11-06 15:20:18,383 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-06 15:20:18,383 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-06 15:20:18,414 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-06 15:20:18,415 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-06 15:20:18,415 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-06 15:20:18,416 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-11-06 15:20:18,417 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-11-06 15:20:18,417 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-06 15:20:18,418 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-06 15:20:18,419 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-06 15:20:18,419 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-06 15:20:18,420 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-11-06 15:20:18,420 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-06 15:20:18,420 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-06 15:20:18,420 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-06 15:20:18,421 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-06 15:20:18,421 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-06 15:20:18,421 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-06 15:20:18,425 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-06 15:20:18,425 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-11-06 15:20:18,425 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-06 15:20:18,425 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-11-06 15:20:18,425 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-06 15:20:18,426 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-06 15:20:18,426 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-06 15:20:18,426 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-11-06 15:20:18,426 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-06 15:20:18,426 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-06 15:20:18,426 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 15:20:18,427 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-06 15:20:18,427 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-06 15:20:18,427 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-06 15:20:18,427 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-11-06 15:20:18,428 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2024-11-06 15:20:18,428 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-06 15:20:18,428 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-11-06 15:20:18,429 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-11-06 15:20:18,429 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-06 15:20:18,429 INFO  L153        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FOX
[2024-11-06 15:20:18,658 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-06 15:20:18,681 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-06 15:20:18,684 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-06 15:20:18,685 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-06 15:20:18,685 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-06 15:20:18,686 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.cav14_example.c
[2024-11-06 15:20:20,041 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-06 15:20:20,217 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-06 15:20:20,217 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.cav14_example.c
[2024-11-06 15:20:20,228 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f565506a/d1ba1d369d5f4eb08561feea7716722c/FLAGbf3c3ddc4
[2024-11-06 15:20:20,247 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f565506a/d1ba1d369d5f4eb08561feea7716722c
[2024-11-06 15:20:20,249 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-06 15:20:20,251 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-11-06 15:20:20,252 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-06 15:20:20,252 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-06 15:20:20,259 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-06 15:20:20,260 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,260 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c3154a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20, skipping insertion in model container
[2024-11-06 15:20:20,261 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,290 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-06 15:20:20,452 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.cav14_example.c[1253,1266]
[2024-11-06 15:20:20,501 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 15:20:20,516 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-06 15:20:20,529 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.cav14_example.c[1253,1266]
[2024-11-06 15:20:20,557 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 15:20:20,578 INFO  L204         MainTranslator]: Completed translation
[2024-11-06 15:20:20,578 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20 WrapperNode
[2024-11-06 15:20:20,578 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-06 15:20:20,580 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-06 15:20:20,580 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-06 15:20:20,580 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-06 15:20:20,586 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,598 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,625 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108
[2024-11-06 15:20:20,626 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-06 15:20:20,627 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-06 15:20:20,627 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-06 15:20:20,627 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-06 15:20:20,639 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,639 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,648 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,668 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2024-11-06 15:20:20,668 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,669 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,677 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,684 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,686 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,687 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,695 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-06 15:20:20,696 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-06 15:20:20,696 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-06 15:20:20,697 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-06 15:20:20,697 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (1/1) ...
[2024-11-06 15:20:20,704 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 15:20:20,715 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 15:20:20,730 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2024-11-06 15:20:20,733 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2024-11-06 15:20:20,760 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-06 15:20:20,761 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-11-06 15:20:20,761 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-06 15:20:20,761 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-06 15:20:20,844 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-06 15:20:20,846 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-06 15:20:21,053 INFO  L?                        ?]: Removed 21 outVars from TransFormulas that were not future-live.
[2024-11-06 15:20:21,053 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-06 15:20:21,067 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-06 15:20:21,067 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-11-06 15:20:21,068 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:20:21 BoogieIcfgContainer
[2024-11-06 15:20:21,068 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-06 15:20:21,088 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-06 15:20:21,089 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-06 15:20:21,092 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-06 15:20:21,093 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 03:20:20" (1/3) ...
[2024-11-06 15:20:21,094 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40095d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:20:21, skipping insertion in model container
[2024-11-06 15:20:21,094 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:20:20" (2/3) ...
[2024-11-06 15:20:21,094 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40095d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:20:21, skipping insertion in model container
[2024-11-06 15:20:21,094 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:20:21" (3/3) ...
[2024-11-06 15:20:21,095 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.cav14_example.c
[2024-11-06 15:20:21,114 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-06 15:20:21,114 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-06 15:20:21,158 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-06 15:20:21,163 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;@3090b2c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-06 15:20:21,163 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-06 15:20:21,166 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)
[2024-11-06 15:20:21,169 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2024-11-06 15:20:21,170 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 15:20:21,170 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2024-11-06 15:20:21,171 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 15:20:21,175 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 15:20:21,175 INFO  L85        PathProgramCache]: Analyzing trace with hash 28694789, now seen corresponding path program 1 times
[2024-11-06 15:20:21,183 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 15:20:21,184 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143459046]
[2024-11-06 15:20:21,184 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 15:20:21,184 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 15:20:21,184 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 15:20:21,186 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-06 15:20:21,187 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-11-06 15:20:21,272 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 15:20:21,282 INFO  L255         TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjuncts are in the unsatisfiable core
[2024-11-06 15:20:21,293 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 15:20:21,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 15:20:21,516 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 15:20:21,517 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 15:20:21,518 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143459046]
[2024-11-06 15:20:21,519 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [143459046] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 15:20:21,519 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-06 15:20:21,519 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2024-11-06 15:20:21,521 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20572725]
[2024-11-06 15:20:21,522 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 15:20:21,526 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2024-11-06 15:20:21,526 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 15:20:21,548 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2024-11-06 15:20:21,549 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2024-11-06 15:20:21,551 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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)
[2024-11-06 15:20:21,593 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 15:20:21,594 INFO  L93              Difference]: Finished difference Result 18 states and 23 transitions.
[2024-11-06 15:20:21,597 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-11-06 15:20:21,598 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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
[2024-11-06 15:20:21,598 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 15:20:21,604 INFO  L225             Difference]: With dead ends: 18
[2024-11-06 15:20:21,604 INFO  L226             Difference]: Without dead ends: 10
[2024-11-06 15:20:21,606 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2024-11-06 15:20:21,610 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-11-06 15:20:21,611 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-06 15:20:21,625 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2024-11-06 15:20:21,637 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9.
[2024-11-06 15:20:21,638 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)
[2024-11-06 15:20:21,639 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2024-11-06 15:20:21,640 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5
[2024-11-06 15:20:21,641 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 15:20:21,641 INFO  L471      AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2024-11-06 15:20:21,641 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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)
[2024-11-06 15:20:21,641 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2024-11-06 15:20:21,642 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2024-11-06 15:20:21,642 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 15:20:21,642 INFO  L215           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1]
[2024-11-06 15:20:21,660 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2024-11-06 15:20:21,846 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 15:20:21,847 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 15:20:21,848 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 15:20:21,848 INFO  L85        PathProgramCache]: Analyzing trace with hash 152739811, now seen corresponding path program 1 times
[2024-11-06 15:20:21,848 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 15:20:21,849 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525546070]
[2024-11-06 15:20:21,849 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 15:20:21,849 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 15:20:21,849 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 15:20:21,851 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-06 15:20:21,852 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2024-11-06 15:20:21,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 15:20:21,934 INFO  L255         TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 26 conjuncts are in the unsatisfiable core
[2024-11-06 15:20:21,941 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 15:20:22,246 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 15:20:22,246 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 15:20:23,726 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 15:20:23,727 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 15:20:23,727 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525546070]
[2024-11-06 15:20:23,727 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525546070] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-06 15:20:23,727 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-06 15:20:23,728 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10
[2024-11-06 15:20:23,728 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216609224]
[2024-11-06 15:20:23,728 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-06 15:20:23,729 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2024-11-06 15:20:23,729 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 15:20:23,730 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2024-11-06 15:20:23,730 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90
[2024-11-06 15:20:23,730 INFO  L87              Difference]: Start difference. First operand 9 states and 9 transitions. Second operand  has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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)
[2024-11-06 15:20:23,976 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 15:20:23,976 INFO  L93              Difference]: Finished difference Result 21 states and 23 transitions.
[2024-11-06 15:20:23,977 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2024-11-06 15:20:23,977 INFO  L78                 Accepts]: Start accepts. Automaton has  has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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
[2024-11-06 15:20:23,977 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 15:20:23,978 INFO  L225             Difference]: With dead ends: 21
[2024-11-06 15:20:23,978 INFO  L226             Difference]: Without dead ends: 19
[2024-11-06 15:20:23,978 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210
[2024-11-06 15:20:23,979 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-06 15:20:23,980 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-06 15:20:23,981 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2024-11-06 15:20:23,983 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18.
[2024-11-06 15:20:23,984 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)
[2024-11-06 15:20:23,984 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions.
[2024-11-06 15:20:23,984 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8
[2024-11-06 15:20:23,985 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 15:20:23,985 INFO  L471      AbstractCegarLoop]: Abstraction has 18 states and 18 transitions.
[2024-11-06 15:20:23,985 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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)
[2024-11-06 15:20:23,985 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions.
[2024-11-06 15:20:23,985 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2024-11-06 15:20:23,986 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 15:20:23,986 INFO  L215           NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1]
[2024-11-06 15:20:24,004 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2024-11-06 15:20:24,186 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 15:20:24,187 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 15:20:24,187 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 15:20:24,188 INFO  L85        PathProgramCache]: Analyzing trace with hash -37306491, now seen corresponding path program 2 times
[2024-11-06 15:20:24,188 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 15:20:24,189 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304496942]
[2024-11-06 15:20:24,189 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2024-11-06 15:20:24,189 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 15:20:24,189 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 15:20:24,191 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-06 15:20:24,193 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2024-11-06 15:20:24,297 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2024-11-06 15:20:24,297 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-06 15:20:24,300 INFO  L255         TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjuncts are in the unsatisfiable core
[2024-11-06 15:20:24,305 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 15:20:24,683 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 15:20:24,683 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-06 15:20:33,750 INFO  L134       CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-06 15:20:33,751 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 15:20:33,751 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304496942]
[2024-11-06 15:20:33,751 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304496942] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-06 15:20:33,751 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-06 15:20:33,752 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14
[2024-11-06 15:20:33,752 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375393294]
[2024-11-06 15:20:33,752 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-06 15:20:33,752 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2024-11-06 15:20:33,753 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 15:20:33,753 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2024-11-06 15:20:33,754 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182
[2024-11-06 15:20:33,754 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)
[2024-11-06 15:20:35,091 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 15:20:35,091 INFO  L93              Difference]: Finished difference Result 39 states and 44 transitions.
[2024-11-06 15:20:35,092 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2024-11-06 15:20:35,092 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
[2024-11-06 15:20:35,092 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 15:20:35,093 INFO  L225             Difference]: With dead ends: 39
[2024-11-06 15:20:35,093 INFO  L226             Difference]: Without dead ends: 37
[2024-11-06 15:20:35,093 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756
[2024-11-06 15:20:35,094 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2024-11-06 15:20:35,095 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2024-11-06 15:20:35,096 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2024-11-06 15:20:35,106 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36.
[2024-11-06 15:20:35,107 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)
[2024-11-06 15:20:35,107 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions.
[2024-11-06 15:20:35,107 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 17
[2024-11-06 15:20:35,107 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 15:20:35,108 INFO  L471      AbstractCegarLoop]: Abstraction has 36 states and 36 transitions.
[2024-11-06 15:20:35,108 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)
[2024-11-06 15:20:35,108 INFO  L276                IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions.
[2024-11-06 15:20:35,109 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2024-11-06 15:20:35,109 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 15:20:35,109 INFO  L215           NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1]
[2024-11-06 15:20:35,127 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2024-11-06 15:20:35,309 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 15:20:35,310 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 15:20:35,311 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 15:20:35,311 INFO  L85        PathProgramCache]: Analyzing trace with hash 1864061253, now seen corresponding path program 3 times
[2024-11-06 15:20:35,312 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 15:20:35,312 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060490956]
[2024-11-06 15:20:35,312 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2024-11-06 15:20:35,312 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 15:20:35,312 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 15:20:35,314 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-06 15:20:35,315 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2024-11-06 15:20:35,499 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s)
[2024-11-06 15:20:35,500 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-06 15:20:35,504 INFO  L255         TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 86 conjuncts are in the unsatisfiable core
[2024-11-06 15:20:35,520 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 15:20:36,277 INFO  L134       CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2024-11-06 15:20:36,277 INFO  L311         TraceCheckSpWp]: Computing backward predicates...