/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.seq.c


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


This is Ultimate 0.2.5-dev-356b6ba-m
[2024-11-01 09:42:55,459 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-01 09:42:55,537 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2024-11-01 09:42:55,542 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-01 09:42:55,543 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-01 09:42:55,581 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-01 09:42:55,581 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-01 09:42:55,582 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-01 09:42:55,583 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-11-01 09:42:55,584 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-11-01 09:42:55,584 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-01 09:42:55,585 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-01 09:42:55,587 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-01 09:42:55,588 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-01 09:42:55,588 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-11-01 09:42:55,588 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-01 09:42:55,589 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-01 09:42:55,589 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-01 09:42:55,589 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-01 09:42:55,589 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-01 09:42:55,590 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-01 09:42:55,591 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-01 09:42:55,606 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-11-01 09:42:55,607 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-01 09:42:55,607 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-11-01 09:42:55,607 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-01 09:42:55,607 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-01 09:42:55,608 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-01 09:42:55,608 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-11-01 09:42:55,608 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-01 09:42:55,608 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-01 09:42:55,609 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-01 09:42:55,609 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-01 09:42:55,609 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-01 09:42:55,609 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-01 09:42:55,610 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-11-01 09:42:55,610 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2024-11-01 09:42:55,613 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-01 09:42:55,613 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-11-01 09:42:55,613 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-11-01 09:42:55,614 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-01 09:42:55,614 INFO  L153        SettingsManager]:  * Logic for external solver=AUFBV
[2024-11-01 09:42:55,614 INFO  L153        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt
[2024-11-01 09:42:55,919 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-01 09:42:55,936 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-01 09:42:55,939 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-01 09:42:55,939 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-01 09:42:55,940 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-01 09:42:55,941 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.seq.c
[2024-11-01 09:42:57,415 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-01 09:42:57,626 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-01 09:42:57,627 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.seq.c
[2024-11-01 09:42:57,633 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb45352f/f4fcd6d9ddb74cbba0ce35d8cd09e108/FLAGda9c4ac05
[2024-11-01 09:42:57,645 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb45352f/f4fcd6d9ddb74cbba0ce35d8cd09e108
[2024-11-01 09:42:57,647 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-01 09:42:57,649 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-11-01 09:42:57,650 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-01 09:42:57,650 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-01 09:42:57,654 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-01 09:42:57,654 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:57,655 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760efcde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57, skipping insertion in model container
[2024-11-01 09:42:57,655 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:57,678 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-01 09:42:57,853 WARN  L251   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.seq.c[1297,1310]
[2024-11-01 09:42:57,896 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-01 09:42:57,913 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-01 09:42:57,926 WARN  L251   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.seq.c[1297,1310]
[2024-11-01 09:42:57,950 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-01 09:42:57,971 INFO  L204         MainTranslator]: Completed translation
[2024-11-01 09:42:57,973 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57 WrapperNode
[2024-11-01 09:42:57,973 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-01 09:42:57,974 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-01 09:42:57,974 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-01 09:42:57,974 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-01 09:42:57,981 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:57,989 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:58,013 INFO  L138                Inliner]: procedures = 18, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86
[2024-11-01 09:42:58,014 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-01 09:42:58,017 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-01 09:42:58,017 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-01 09:42:58,017 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-01 09:42:58,026 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:58,026 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:58,031 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:58,048 INFO  L175           MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6]. The 0 writes are split as follows [0, 0].
[2024-11-01 09:42:58,048 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:58,049 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:58,054 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:58,060 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:58,062 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:58,064 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:58,068 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-01 09:42:58,073 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-01 09:42:58,073 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-01 09:42:58,073 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-01 09:42:58,074 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (1/1) ...
[2024-11-01 09:42:58,081 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-01 09:42:58,091 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-01 09:42:58,107 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2024-11-01 09:42:58,111 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2024-11-01 09:42:58,140 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-01 09:42:58,141 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-11-01 09:42:58,141 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1
[2024-11-01 09:42:58,141 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-01 09:42:58,141 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-01 09:42:58,245 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-01 09:42:58,247 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-01 09:42:58,441 INFO  L?                        ?]: Removed 23 outVars from TransFormulas that were not future-live.
[2024-11-01 09:42:58,442 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-01 09:42:58,452 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-01 09:42:58,453 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-11-01 09:42:58,453 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 09:42:58 BoogieIcfgContainer
[2024-11-01 09:42:58,453 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-01 09:42:58,456 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-01 09:42:58,456 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-01 09:42:58,459 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-01 09:42:58,459 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.11 09:42:57" (1/3) ...
[2024-11-01 09:42:58,460 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368099dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 09:42:58, skipping insertion in model container
[2024-11-01 09:42:58,460 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.11 09:42:57" (2/3) ...
[2024-11-01 09:42:58,461 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368099dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.11 09:42:58, skipping insertion in model container
[2024-11-01 09:42:58,461 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.11 09:42:58" (3/3) ...
[2024-11-01 09:42:58,462 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.seq.c
[2024-11-01 09:42:58,480 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-01 09:42:58,481 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-01 09:42:58,538 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-01 09:42:58,545 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;@6d231add, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-01 09:42:58,545 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-01 09:42:58,553 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 10 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:42:58,560 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2024-11-01 09:42:58,560 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 09:42:58,561 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2024-11-01 09:42:58,563 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 09:42:58,568 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 09:42:58,568 INFO  L85        PathProgramCache]: Analyzing trace with hash 28694789, now seen corresponding path program 1 times
[2024-11-01 09:42:58,578 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 09:42:58,579 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372656454]
[2024-11-01 09:42:58,580 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 09:42:58,582 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-01 09:42:58,582 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-01 09:42:58,585 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-01 09:42:58,587 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process
[2024-11-01 09:42:58,750 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 09:42:58,754 INFO  L255         TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjuncts are in the unsatisfiable core
[2024-11-01 09:42:58,768 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 09:42:59,043 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:42:59,043 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-01 09:42:59,212 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:42:59,213 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-01 09:42:59,213 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372656454]
[2024-11-01 09:42:59,214 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [372656454] provided 2 perfect and 0 imperfect interpolant sequences
[2024-11-01 09:42:59,214 INFO  L185   FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2024-11-01 09:42:59,214 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6
[2024-11-01 09:42:59,216 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304066974]
[2024-11-01 09:42:59,217 INFO  L85    oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2024-11-01 09:42:59,221 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2024-11-01 09:42:59,221 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-01 09:42:59,239 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2024-11-01 09:42:59,240 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2024-11-01 09:42:59,242 INFO  L87              Difference]: Start difference. First operand  has 10 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:42:59,317 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-01 09:42:59,317 INFO  L93              Difference]: Finished difference Result 18 states and 23 transitions.
[2024-11-01 09:42:59,318 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-11-01 09:42:59,320 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5
[2024-11-01 09:42:59,320 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-01 09:42:59,325 INFO  L225             Difference]: With dead ends: 18
[2024-11-01 09:42:59,326 INFO  L226             Difference]: Without dead ends: 10
[2024-11-01 09:42:59,328 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2024-11-01 09:42:59,332 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-11-01 09:42:59,334 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-01 09:42:59,347 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2024-11-01 09:42:59,356 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9.
[2024-11-01 09:42:59,357 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:42:59,358 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2024-11-01 09:42:59,359 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5
[2024-11-01 09:42:59,359 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-01 09:42:59,359 INFO  L471      AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2024-11-01 09:42:59,359 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:42:59,359 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2024-11-01 09:42:59,360 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2024-11-01 09:42:59,360 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 09:42:59,360 INFO  L215           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1]
[2024-11-01 09:42:59,364 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0
[2024-11-01 09:42:59,560 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-01 09:42:59,561 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 09:42:59,562 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 09:42:59,562 INFO  L85        PathProgramCache]: Analyzing trace with hash 152739811, now seen corresponding path program 1 times
[2024-11-01 09:42:59,562 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 09:42:59,562 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466274980]
[2024-11-01 09:42:59,562 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 09:42:59,563 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-01 09:42:59,563 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-01 09:42:59,564 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-01 09:42:59,565 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process
[2024-11-01 09:42:59,716 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 09:42:59,723 INFO  L255         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 25 conjuncts are in the unsatisfiable core
[2024-11-01 09:42:59,730 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 09:43:00,057 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:43:00,058 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-01 09:43:00,600 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:43:00,601 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-01 09:43:00,601 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466274980]
[2024-11-01 09:43:00,601 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [466274980] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-01 09:43:00,601 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-01 09:43:00,601 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8
[2024-11-01 09:43:00,601 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160986622]
[2024-11-01 09:43:00,601 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-01 09:43:00,602 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2024-11-01 09:43:00,603 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-01 09:43:00,603 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2024-11-01 09:43:00,604 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2024-11-01 09:43:00,604 INFO  L87              Difference]: Start difference. First operand 9 states and 9 transitions. Second operand  has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:43:01,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-01 09:43:01,040 INFO  L93              Difference]: Finished difference Result 18 states and 19 transitions.
[2024-11-01 09:43:01,041 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2024-11-01 09:43:01,041 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2024-11-01 09:43:01,042 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-01 09:43:01,042 INFO  L225             Difference]: With dead ends: 18
[2024-11-01 09:43:01,042 INFO  L226             Difference]: Without dead ends: 16
[2024-11-01 09:43:01,043 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132
[2024-11-01 09:43:01,044 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2024-11-01 09:43:01,044 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2024-11-01 09:43:01,045 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2024-11-01 09:43:01,052 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15.
[2024-11-01 09:43:01,053 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:43:01,053 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions.
[2024-11-01 09:43:01,054 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8
[2024-11-01 09:43:01,054 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-01 09:43:01,054 INFO  L471      AbstractCegarLoop]: Abstraction has 15 states and 15 transitions.
[2024-11-01 09:43:01,054 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:43:01,054 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions.
[2024-11-01 09:43:01,055 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2024-11-01 09:43:01,055 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 09:43:01,055 INFO  L215           NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1]
[2024-11-01 09:43:01,060 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0
[2024-11-01 09:43:01,258 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-01 09:43:01,259 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 09:43:01,259 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 09:43:01,259 INFO  L85        PathProgramCache]: Analyzing trace with hash 1333570723, now seen corresponding path program 2 times
[2024-11-01 09:43:01,260 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 09:43:01,260 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251661747]
[2024-11-01 09:43:01,260 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 09:43:01,260 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-01 09:43:01,260 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-01 09:43:01,264 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-01 09:43:01,266 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process
[2024-11-01 09:43:01,440 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 09:43:01,443 INFO  L255         TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjuncts are in the unsatisfiable core
[2024-11-01 09:43:01,448 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 09:43:01,904 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:43:01,904 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-01 09:43:05,612 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:43:05,613 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-01 09:43:05,616 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251661747]
[2024-11-01 09:43:05,616 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1251661747] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-01 09:43:05,616 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-01 09:43:05,616 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12
[2024-11-01 09:43:05,616 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738307284]
[2024-11-01 09:43:05,616 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-01 09:43:05,617 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2024-11-01 09:43:05,617 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-01 09:43:05,619 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2024-11-01 09:43:05,620 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132
[2024-11-01 09:43:05,620 INFO  L87              Difference]: Start difference. First operand 15 states and 15 transitions. Second operand  has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:43:08,490 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-01 09:43:08,490 INFO  L93              Difference]: Finished difference Result 30 states and 33 transitions.
[2024-11-01 09:43:08,491 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2024-11-01 09:43:08,491 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 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 14
[2024-11-01 09:43:08,491 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-01 09:43:08,492 INFO  L225             Difference]: With dead ends: 30
[2024-11-01 09:43:08,492 INFO  L226             Difference]: Without dead ends: 28
[2024-11-01 09:43:08,492 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462
[2024-11-01 09:43:08,493 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2024-11-01 09:43:08,494 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2024-11-01 09:43:08,494 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2024-11-01 09:43:08,499 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27.
[2024-11-01 09:43:08,500 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:43:08,500 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions.
[2024-11-01 09:43:08,501 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14
[2024-11-01 09:43:08,501 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-01 09:43:08,501 INFO  L471      AbstractCegarLoop]: Abstraction has 27 states and 27 transitions.
[2024-11-01 09:43:08,501 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:43:08,501 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions.
[2024-11-01 09:43:08,502 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2024-11-01 09:43:08,502 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 09:43:08,502 INFO  L215           NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1]
[2024-11-01 09:43:08,507 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0
[2024-11-01 09:43:08,702 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-01 09:43:08,703 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 09:43:08,704 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 09:43:08,704 INFO  L85        PathProgramCache]: Analyzing trace with hash 96933411, now seen corresponding path program 3 times
[2024-11-01 09:43:08,704 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 09:43:08,704 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285985452]
[2024-11-01 09:43:08,704 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 09:43:08,705 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-01 09:43:08,705 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-01 09:43:08,707 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-01 09:43:08,709 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process
[2024-11-01 09:43:08,992 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 09:43:08,996 INFO  L255         TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 37 conjuncts are in the unsatisfiable core
[2024-11-01 09:43:09,000 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 09:43:09,820 INFO  L134       CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:43:09,821 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-01 09:43:35,113 INFO  L134       CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-01 09:43:35,113 INFO  L136   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2024-11-01 09:43:35,113 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285985452]
[2024-11-01 09:43:35,114 INFO  L158   FreeRefinementEngine]: IpTcStrategyModulePreferences [1285985452] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-01 09:43:35,114 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2024-11-01 09:43:35,114 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20
[2024-11-01 09:43:35,114 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152436857]
[2024-11-01 09:43:35,114 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2024-11-01 09:43:35,115 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2024-11-01 09:43:35,116 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2024-11-01 09:43:35,116 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2024-11-01 09:43:35,117 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380
[2024-11-01 09:43:35,117 INFO  L87              Difference]: Start difference. First operand 27 states and 27 transitions. Second operand  has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:43:48,749 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1]
[2024-11-01 09:43:58,391 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1]
[2024-11-01 09:44:18,443 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-01 09:44:18,443 INFO  L93              Difference]: Finished difference Result 54 states and 61 transitions.
[2024-11-01 09:44:18,444 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2024-11-01 09:44:18,444 INFO  L78                 Accepts]: Start accepts. Automaton has  has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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 26
[2024-11-01 09:44:18,444 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-01 09:44:18,445 INFO  L225             Difference]: With dead ends: 54
[2024-11-01 09:44:18,445 INFO  L226             Difference]: Without dead ends: 52
[2024-11-01 09:44:18,446 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=515, Invalid=1207, Unknown=0, NotChecked=0, Total=1722
[2024-11-01 09:44:18,447 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time
[2024-11-01 09:44:18,447 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 38 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time]
[2024-11-01 09:44:18,448 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2024-11-01 09:44:18,461 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51.
[2024-11-01 09:44:18,461 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:44:18,462 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions.
[2024-11-01 09:44:18,462 INFO  L78                 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26
[2024-11-01 09:44:18,462 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-01 09:44:18,462 INFO  L471      AbstractCegarLoop]: Abstraction has 51 states and 51 transitions.
[2024-11-01 09:44:18,463 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-11-01 09:44:18,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions.
[2024-11-01 09:44:18,464 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2024-11-01 09:44:18,464 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-01 09:44:18,464 INFO  L215           NwaCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1]
[2024-11-01 09:44:18,471 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0
[2024-11-01 09:44:18,664 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt
[2024-11-01 09:44:18,665 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-01 09:44:18,665 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-01 09:44:18,665 INFO  L85        PathProgramCache]: Analyzing trace with hash 2084907299, now seen corresponding path program 4 times
[2024-11-01 09:44:18,665 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2024-11-01 09:44:18,665 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231224212]
[2024-11-01 09:44:18,666 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-01 09:44:18,666 INFO  L173          SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2024-11-01 09:44:18,666 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
[2024-11-01 09:44:18,668 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2024-11-01 09:44:18,669 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process
[2024-11-01 09:44:19,153 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-01 09:44:19,158 INFO  L255         TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 49 conjuncts are in the unsatisfiable core
[2024-11-01 09:44:19,162 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-01 09:44:21,003 INFO  L134       CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 327 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2024-11-01 09:44:21,003 INFO  L311         TraceCheckSpWp]: Computing backward predicates...