/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c


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


This is Ultimate 0.2.2-dev-a10ec3b
[2022-01-10 02:48:12,654 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-01-10 02:48:12,656 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2022-01-10 02:48:12,737 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-01-10 02:48:12,738 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-01-10 02:48:12,739 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-01-10 02:48:12,739 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-01-10 02:48:12,740 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-01-10 02:48:12,742 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-01-10 02:48:12,745 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-01-10 02:48:12,747 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-01-10 02:48:12,750 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-01-10 02:48:12,751 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-01-10 02:48:12,759 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2022-01-10 02:48:12,759 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2022-01-10 02:48:12,762 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-01-10 02:48:12,762 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2022-01-10 02:48:12,764 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
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[2022-01-10 02:48:12,766 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-01-10 02:48:12,766 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2022-01-10 02:48:12,767 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-01-10 02:48:12,770 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-01-10 02:48:12,771 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf
[2022-01-10 02:48:12,806 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-01-10 02:48:12,806 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-01-10 02:48:12,807 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-01-10 02:48:12,807 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-01-10 02:48:12,807 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-01-10 02:48:12,807 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-01-10 02:48:12,808 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-01-10 02:48:12,808 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-01-10 02:48:12,808 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-01-10 02:48:12,808 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-01-10 02:48:12,809 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-01-10 02:48:12,809 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-01-10 02:48:12,809 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-01-10 02:48:12,809 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-01-10 02:48:12,809 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-01-10 02:48:12,810 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-01-10 02:48:12,810 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2022-01-10 02:48:12,810 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2022-01-10 02:48:12,810 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-01-10 02:48:12,810 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-01-10 02:48:12,810 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-01-10 02:48:12,810 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-01-10 02:48:12,810 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-01-10 02:48:12,811 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 02:48:12,812 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-01-10 02:48:12,812 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-01-10 02:48:12,812 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-01-10 02:48:12,812 INFO  L138        SettingsManager]:  * Trace refinement strategy=WOLF
[2022-01-10 02:48:12,812 INFO  L138        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt 
[2022-01-10 02:48:12,812 INFO  L138        SettingsManager]:  * Large block encoding in concurrent analysis=OFF
[2022-01-10 02:48:12,812 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-01-10 02:48:12,813 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-01-10 02:48:12,813 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2022-01-10 02:48:12,813 INFO  L138        SettingsManager]:  * Logic for external solver=AUFBV
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN;
[2022-01-10 02:48:13,041 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-01-10 02:48:13,063 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-01-10 02:48:13,065 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-01-10 02:48:13,065 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-01-10 02:48:13,066 INFO  L275        PluginConnector]: CDTParser initialized
[2022-01-10 02:48:13,067 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c
[2022-01-10 02:48:13,123 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff1d4cab/b9de5b4c939242349d8e0fb7dd21db41/FLAG758695e9f
[2022-01-10 02:48:13,511 INFO  L306              CDTParser]: Found 1 translation units.
[2022-01-10 02:48:13,512 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c
[2022-01-10 02:48:13,521 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff1d4cab/b9de5b4c939242349d8e0fb7dd21db41/FLAG758695e9f
[2022-01-10 02:48:13,938 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff1d4cab/b9de5b4c939242349d8e0fb7dd21db41
[2022-01-10 02:48:13,940 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-01-10 02:48:13,941 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-01-10 02:48:13,947 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-01-10 02:48:13,947 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-01-10 02:48:13,953 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-01-10 02:48:13,953 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:48:13" (1/1) ...
[2022-01-10 02:48:13,954 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3378c317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:13, skipping insertion in model container
[2022-01-10 02:48:13,955 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:48:13" (1/1) ...
[2022-01-10 02:48:13,961 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-01-10 02:48:13,972 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-01-10 02:48:14,128 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c[989,1002]
[2022-01-10 02:48:14,130 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 02:48:14,150 INFO  L203         MainTranslator]: Completed pre-run
[2022-01-10 02:48:14,170 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c[989,1002]
[2022-01-10 02:48:14,172 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-01-10 02:48:14,185 INFO  L208         MainTranslator]: Completed translation
[2022-01-10 02:48:14,186 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14 WrapperNode
[2022-01-10 02:48:14,186 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-01-10 02:48:14,187 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-01-10 02:48:14,187 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-01-10 02:48:14,187 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-01-10 02:48:14,193 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14" (1/1) ...
[2022-01-10 02:48:14,200 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14" (1/1) ...
[2022-01-10 02:48:14,215 INFO  L137                Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 40
[2022-01-10 02:48:14,215 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-01-10 02:48:14,216 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-01-10 02:48:14,216 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-01-10 02:48:14,216 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-01-10 02:48:14,222 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14" (1/1) ...
[2022-01-10 02:48:14,222 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14" (1/1) ...
[2022-01-10 02:48:14,225 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14" (1/1) ...
[2022-01-10 02:48:14,226 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14" (1/1) ...
[2022-01-10 02:48:14,237 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14" (1/1) ...
[2022-01-10 02:48:14,239 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14" (1/1) ...
[2022-01-10 02:48:14,245 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14" (1/1) ...
[2022-01-10 02:48:14,246 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-01-10 02:48:14,247 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-01-10 02:48:14,247 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-01-10 02:48:14,247 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-01-10 02:48:14,251 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14" (1/1) ...
[2022-01-10 02:48:14,256 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-01-10 02:48:14,266 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-01-10 02:48:14,276 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-01-10 02:48:14,291 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-01-10 02:48:14,315 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-01-10 02:48:14,315 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2022-01-10 02:48:14,315 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-01-10 02:48:14,315 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-01-10 02:48:14,372 INFO  L234             CfgBuilder]: Building ICFG
[2022-01-10 02:48:14,374 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-01-10 02:48:14,488 INFO  L275             CfgBuilder]: Performing block encoding
[2022-01-10 02:48:14,492 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-01-10 02:48:14,492 INFO  L299             CfgBuilder]: Removed 0 assume(true) statements.
[2022-01-10 02:48:14,493 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:48:14 BoogieIcfgContainer
[2022-01-10 02:48:14,494 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-01-10 02:48:14,495 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-01-10 02:48:14,495 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-01-10 02:48:14,504 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-01-10 02:48:14,505 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:48:13" (1/3) ...
[2022-01-10 02:48:14,505 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600ad0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:48:14, skipping insertion in model container
[2022-01-10 02:48:14,505 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:48:14" (2/3) ...
[2022-01-10 02:48:14,506 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600ad0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:48:14, skipping insertion in model container
[2022-01-10 02:48:14,506 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:48:14" (3/3) ...
[2022-01-10 02:48:14,507 INFO  L111   eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.p+cfa-reducer.c
[2022-01-10 02:48:14,512 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-01-10 02:48:14,512 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-01-10 02:48:14,561 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-01-10 02:48:14,569 INFO  L339      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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR
[2022-01-10 02:48:14,569 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-01-10 02:48:14,582 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 11 states, 9 states have (on average 1.5555555555555556) 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)
[2022-01-10 02:48:14,595 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-01-10 02:48:14,595 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:48:14,596 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:48:14,597 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:48:14,602 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:48:14,603 INFO  L85        PathProgramCache]: Analyzing trace with hash 1806908747, now seen corresponding path program 1 times
[2022-01-10 02:48:14,612 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:48:14,613 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364899645]
[2022-01-10 02:48:14,613 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 02:48:14,614 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:48:14,614 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:48:14,619 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:48:14,643 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process
[2022-01-10 02:48:14,707 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 02:48:14,709 INFO  L263         TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 2 conjunts are in the unsatisfiable core
[2022-01-10 02:48:14,713 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:48:14,814 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:48:14,814 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-01-10 02:48:14,815 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 02:48:14,815 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364899645]
[2022-01-10 02:48:14,816 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [364899645] provided 1 perfect and 0 imperfect interpolant sequences
[2022-01-10 02:48:14,816 INFO  L186   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-01-10 02:48:14,816 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-01-10 02:48:14,817 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317411665]
[2022-01-10 02:48:14,818 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-01-10 02:48:14,821 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-01-10 02:48:14,821 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 02:48:14,849 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-01-10 02:48:14,849 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 02:48:14,851 INFO  L87              Difference]: Start difference. First operand  has 11 states, 9 states have (on average 1.5555555555555556) 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) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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)
[2022-01-10 02:48:14,872 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 02:48:14,872 INFO  L93              Difference]: Finished difference Result 21 states and 24 transitions.
[2022-01-10 02:48:14,874 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-01-10 02:48:14,875 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7
[2022-01-10 02:48:14,875 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 02:48:14,881 INFO  L225             Difference]: With dead ends: 21
[2022-01-10 02:48:14,882 INFO  L226             Difference]: Without dead ends: 9
[2022-01-10 02:48:14,884 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-01-10 02:48:14,888 INFO  L933         BasicCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-01-10 02:48:14,890 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-01-10 02:48:14,903 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9 states.
[2022-01-10 02:48:14,915 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9.
[2022-01-10 02:48:14,916 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)
[2022-01-10 02:48:14,916 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions.
[2022-01-10 02:48:14,917 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7
[2022-01-10 02:48:14,918 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 02:48:14,918 INFO  L470      AbstractCegarLoop]: Abstraction has 9 states and 9 transitions.
[2022-01-10 02:48:14,918 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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)
[2022-01-10 02:48:14,919 INFO  L276                IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions.
[2022-01-10 02:48:14,919 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-01-10 02:48:14,919 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:48:14,919 INFO  L514         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:48:14,931 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0
[2022-01-10 02:48:15,127 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 02:48:15,128 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:48:15,129 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:48:15,129 INFO  L85        PathProgramCache]: Analyzing trace with hash 179533835, now seen corresponding path program 1 times
[2022-01-10 02:48:15,129 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:48:15,129 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377744760]
[2022-01-10 02:48:15,130 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-01-10 02:48:15,130 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:48:15,130 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:48:15,133 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:48:15,135 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process
[2022-01-10 02:48:15,174 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-01-10 02:48:15,175 INFO  L263         TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-01-10 02:48:15,177 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:48:15,424 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:48:15,425 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 02:48:15,639 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:48:15,640 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 02:48:15,640 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377744760]
[2022-01-10 02:48:15,640 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [377744760] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 02:48:15,640 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 02:48:15,640 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12
[2022-01-10 02:48:15,641 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176660065]
[2022-01-10 02:48:15,641 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 02:48:15,642 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-01-10 02:48:15,642 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 02:48:15,642 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-01-10 02:48:15,643 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132
[2022-01-10 02:48:15,643 INFO  L87              Difference]: Start difference. First operand 9 states and 9 transitions. Second operand  has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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)
[2022-01-10 02:48:15,826 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 02:48:15,827 INFO  L93              Difference]: Finished difference Result 17 states and 19 transitions.
[2022-01-10 02:48:15,827 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2022-01-10 02:48:15,828 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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
[2022-01-10 02:48:15,828 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 02:48:15,828 INFO  L225             Difference]: With dead ends: 17
[2022-01-10 02:48:15,828 INFO  L226             Difference]: Without dead ends: 12
[2022-01-10 02:48:15,829 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240
[2022-01-10 02:48:15,830 INFO  L933         BasicCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-01-10 02:48:15,831 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time]
[2022-01-10 02:48:15,831 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2022-01-10 02:48:15,834 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12.
[2022-01-10 02:48:15,834 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 02:48:15,834 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions.
[2022-01-10 02:48:15,834 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8
[2022-01-10 02:48:15,835 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 02:48:15,835 INFO  L470      AbstractCegarLoop]: Abstraction has 12 states and 12 transitions.
[2022-01-10 02:48:15,835 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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)
[2022-01-10 02:48:15,835 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions.
[2022-01-10 02:48:15,835 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-01-10 02:48:15,835 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:48:15,836 INFO  L514         BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:48:15,847 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0
[2022-01-10 02:48:16,046 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 02:48:16,047 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:48:16,047 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:48:16,048 INFO  L85        PathProgramCache]: Analyzing trace with hash 1196158283, now seen corresponding path program 2 times
[2022-01-10 02:48:16,048 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:48:16,048 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130424080]
[2022-01-10 02:48:16,048 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-01-10 02:48:16,049 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:48:16,049 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:48:16,050 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:48:16,052 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process
[2022-01-10 02:48:16,094 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-01-10 02:48:16,094 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 02:48:16,096 INFO  L263         TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 16 conjunts are in the unsatisfiable core
[2022-01-10 02:48:16,097 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:48:16,575 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:48:16,575 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 02:48:17,755 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:48:17,755 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 02:48:17,756 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130424080]
[2022-01-10 02:48:17,756 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130424080] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 02:48:17,756 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 02:48:17,756 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18
[2022-01-10 02:48:17,756 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798100225]
[2022-01-10 02:48:17,756 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 02:48:17,757 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2022-01-10 02:48:17,757 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 02:48:17,757 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2022-01-10 02:48:17,758 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306
[2022-01-10 02:48:17,758 INFO  L87              Difference]: Start difference. First operand 12 states and 12 transitions. Second operand  has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 02:48:19,929 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 02:48:19,929 INFO  L93              Difference]: Finished difference Result 25 states and 30 transitions.
[2022-01-10 02:48:19,929 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2022-01-10 02:48:19,929 INFO  L78                 Accepts]: Start accepts. Automaton has  has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11
[2022-01-10 02:48:19,930 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 02:48:19,930 INFO  L225             Difference]: With dead ends: 25
[2022-01-10 02:48:19,930 INFO  L226             Difference]: Without dead ends: 18
[2022-01-10 02:48:19,931 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702
[2022-01-10 02:48:19,932 INFO  L933         BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-01-10 02:48:19,932 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 33 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 46 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time]
[2022-01-10 02:48:19,933 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2022-01-10 02:48:19,937 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18.
[2022-01-10 02:48:19,937 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)
[2022-01-10 02:48:19,937 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions.
[2022-01-10 02:48:19,938 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11
[2022-01-10 02:48:19,938 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 02:48:19,938 INFO  L470      AbstractCegarLoop]: Abstraction has 18 states and 18 transitions.
[2022-01-10 02:48:19,938 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-01-10 02:48:19,938 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions.
[2022-01-10 02:48:19,938 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-01-10 02:48:19,939 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:48:19,939 INFO  L514         BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:48:19,949 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0
[2022-01-10 02:48:20,147 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 02:48:20,147 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:48:20,148 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:48:20,148 INFO  L85        PathProgramCache]: Analyzing trace with hash -1237584565, now seen corresponding path program 3 times
[2022-01-10 02:48:20,148 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:48:20,148 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835690200]
[2022-01-10 02:48:20,148 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-01-10 02:48:20,148 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:48:20,149 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:48:20,150 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:48:20,151 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process
[2022-01-10 02:48:20,198 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2022-01-10 02:48:20,198 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 02:48:20,201 WARN  L261         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 35 conjunts are in the unsatisfiable core
[2022-01-10 02:48:20,202 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:48:21,885 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:48:21,886 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-01-10 02:48:33,711 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:48:33,712 INFO  L139   FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2022-01-10 02:48:33,712 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835690200]
[2022-01-10 02:48:33,712 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleMathsat [835690200] provided 0 perfect and 2 imperfect interpolant sequences
[2022-01-10 02:48:33,712 INFO  L186   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-01-10 02:48:33,712 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29
[2022-01-10 02:48:33,713 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466345290]
[2022-01-10 02:48:33,713 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-01-10 02:48:33,713 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 29 states
[2022-01-10 02:48:33,713 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2022-01-10 02:48:33,714 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants.
[2022-01-10 02:48:33,714 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812
[2022-01-10 02:48:33,714 INFO  L87              Difference]: Start difference. First operand 18 states and 18 transitions. Second operand  has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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)
[2022-01-10 02:49:11,395 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-01-10 02:49:11,396 INFO  L93              Difference]: Finished difference Result 34 states and 45 transitions.
[2022-01-10 02:49:11,398 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2022-01-10 02:49:11,398 INFO  L78                 Accepts]: Start accepts. Automaton has  has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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
[2022-01-10 02:49:11,398 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-01-10 02:49:11,398 INFO  L225             Difference]: With dead ends: 34
[2022-01-10 02:49:11,399 INFO  L226             Difference]: Without dead ends: 30
[2022-01-10 02:49:11,401 INFO  L932         BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722
[2022-01-10 02:49:11,402 INFO  L933         BasicCegarLoop]: 5 mSDtfsCounter, 106 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2022-01-10 02:49:11,404 INFO  L934         BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 31 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 162 Invalid, 0 Unknown, 51 Unchecked, 0.8s Time]
[2022-01-10 02:49:11,404 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2022-01-10 02:49:11,413 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2022-01-10 02:49:11,413 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 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)
[2022-01-10 02:49:11,414 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions.
[2022-01-10 02:49:11,414 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 17
[2022-01-10 02:49:11,414 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-01-10 02:49:11,414 INFO  L470      AbstractCegarLoop]: Abstraction has 30 states and 30 transitions.
[2022-01-10 02:49:11,414 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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)
[2022-01-10 02:49:11,414 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions.
[2022-01-10 02:49:11,415 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-01-10 02:49:11,415 INFO  L506         BasicCegarLoop]: Found error trace
[2022-01-10 02:49:11,415 INFO  L514         BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1]
[2022-01-10 02:49:11,421 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0
[2022-01-10 02:49:11,615 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3
[2022-01-10 02:49:11,616 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-01-10 02:49:11,616 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-01-10 02:49:11,616 INFO  L85        PathProgramCache]: Analyzing trace with hash 36308299, now seen corresponding path program 4 times
[2022-01-10 02:49:11,617 INFO  L121   FreeRefinementEngine]: Executing refinement strategy WOLF
[2022-01-10 02:49:11,617 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765161630]
[2022-01-10 02:49:11,617 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-01-10 02:49:11,617 INFO  L168          SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2022-01-10 02:49:11,617 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat
[2022-01-10 02:49:11,618 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2022-01-10 02:49:11,619 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process
[2022-01-10 02:49:11,679 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-01-10 02:49:11,680 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-01-10 02:49:11,684 WARN  L261         TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 64 conjunts are in the unsatisfiable core
[2022-01-10 02:49:11,686 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-01-10 02:49:16,034 INFO  L134       CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-01-10 02:49:16,034 INFO  L328         TraceCheckSpWp]: Computing backward predicates...