/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label43.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:05:16,869 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2023-04-01 10:05:16,898 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2023-04-01 10:05:16,906 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 10:05:16,915 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
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[2023-04-01 10:05:16,925 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2023-04-01 10:05:16,938 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 10:05:16,939 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:05:16,940 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-04-01 10:05:16,968 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:05:16,969 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:05:16,969 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:05:16,969 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:05:16,970 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:05:16,970 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:05:16,970 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:05:16,970 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:05:16,970 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:05:16,970 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:05:16,971 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:05:16,971 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:05:16,971 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:05:16,971 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:05:16,971 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:05:16,972 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:05:16,972 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:05:16,972 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:05:16,972 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:05:16,972 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:05:16,972 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:05:16,972 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:05:16,973 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:05:16,973 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:05:16,973 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:05:16,973 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:05:16,973 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:05:16,973 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:05:16,973 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:05:16,973 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:05:16,973 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:05:16,974 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:05:16,974 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:05:16,974 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:05:16,974 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:05:16,974 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:05:16,974 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:05:16,974 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:05:16,974 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:05:16,974 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:05:16,974 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:05:16,975 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:05:17,152 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:05:17,173 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:05:17,177 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:05:17,178 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:05:17,178 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:05:17,179 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label43.c
[2023-04-01 10:05:18,162 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:05:18,491 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:05:18,491 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label43.c
[2023-04-01 10:05:18,515 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc6d8e016/a0647dc16b59422a88725cb5dc7578f5/FLAG1449ad02f
[2023-04-01 10:05:18,528 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc6d8e016/a0647dc16b59422a88725cb5dc7578f5
[2023-04-01 10:05:18,532 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:05:18,533 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:05:18,535 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:05:18,535 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:05:18,538 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:05:18,538 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:05:18" (1/1) ...
[2023-04-01 10:05:18,539 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d59150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:18, skipping insertion in model container
[2023-04-01 10:05:18,540 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:05:18" (1/1) ...
[2023-04-01 10:05:18,544 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:05:18,656 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:05:18,802 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label43.c[5259,5272]
[2023-04-01 10:05:19,380 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:05:19,390 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:05:19,410 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label43.c[5259,5272]
[2023-04-01 10:05:19,695 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:05:19,713 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:05:19,714 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:19 WrapperNode
[2023-04-01 10:05:19,714 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:05:19,716 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:05:19,716 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:05:19,716 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:05:19,724 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:19" (1/1) ...
[2023-04-01 10:05:19,724 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:19" (1/1) ...
[2023-04-01 10:05:19,765 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:19" (1/1) ...
[2023-04-01 10:05:19,765 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:19" (1/1) ...
[2023-04-01 10:05:19,825 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:19" (1/1) ...
[2023-04-01 10:05:19,848 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:19" (1/1) ...
[2023-04-01 10:05:19,862 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:19" (1/1) ...
[2023-04-01 10:05:19,878 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:19" (1/1) ...
[2023-04-01 10:05:19,906 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:05:19,907 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:05:19,907 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:05:19,907 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:05:19,908 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:19" (1/1) ...
[2023-04-01 10:05:19,912 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:05:19,918 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:05:19,938 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)
[2023-04-01 10:05:19,952 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
[2023-04-01 10:05:19,969 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:05:19,969 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:05:19,970 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:05:19,970 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:05:19,970 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:05:19,970 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 10:05:19,970 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2023-04-01 10:05:19,970 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:05:19,970 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:05:19,970 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:05:19,970 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 10:05:19,970 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2023-04-01 10:05:19,970 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:05:19,970 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:05:19,970 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:05:19,970 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:05:19,970 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:05:19,970 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:05:19,971 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:05:19,971 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:05:19,971 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:05:19,971 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:05:19,971 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:05:19,971 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:05:19,971 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:05:20,033 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:05:20,037 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:05:22,979 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:05:23,399 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:05:23,399 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:05:23,402 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:05:23 BoogieIcfgContainer
[2023-04-01 10:05:23,402 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:05:23,404 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:05:23,404 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:05:23,406 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:05:23,407 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:05:18" (1/3) ...
[2023-04-01 10:05:23,407 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64146bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:05:23, skipping insertion in model container
[2023-04-01 10:05:23,407 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:05:19" (2/3) ...
[2023-04-01 10:05:23,407 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64146bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:05:23, skipping insertion in model container
[2023-04-01 10:05:23,407 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:05:23" (3/3) ...
[2023-04-01 10:05:23,408 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem12_label43.c
[2023-04-01 10:05:23,423 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:05:23,423 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:05:23,464 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:05:23,469 INFO  L357      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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69b7f0cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:05:23,470 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:05:23,475 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-04-01 10:05:23,480 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:05:23,480 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:05:23,480 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:05:23,481 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:05:23,484 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:05:23,485 INFO  L85        PathProgramCache]: Analyzing trace with hash 636342529, now seen corresponding path program 1 times
[2023-04-01 10:05:23,491 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:05:23,491 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323797816]
[2023-04-01 10:05:23,492 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:05:23,492 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:05:23,569 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:05:23,767 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:05:23,767 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:05:23,768 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323797816]
[2023-04-01 10:05:23,768 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323797816] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:05:23,768 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:05:23,768 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:05:23,769 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176278097]
[2023-04-01 10:05:23,770 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:05:23,773 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:05:23,773 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:05:23,792 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:05:23,792 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:05:23,796 INFO  L87              Difference]: Start difference. First operand  has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 10:05:26,520 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:05:26,520 INFO  L93              Difference]: Finished difference Result 2068 states and 4065 transitions.
[2023-04-01 10:05:26,526 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:05:26,527 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2023-04-01 10:05:26,527 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:05:26,546 INFO  L225             Difference]: With dead ends: 2068
[2023-04-01 10:05:26,546 INFO  L226             Difference]: Without dead ends: 1371
[2023-04-01 10:05:26,553 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:05:26,555 INFO  L413           NwaCegarLoop]: 245 mSDtfsCounter, 803 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time
[2023-04-01 10:05:26,556 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 270 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 2101 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time]
[2023-04-01 10:05:26,610 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1371 states.
[2023-04-01 10:05:26,698 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365.
[2023-04-01 10:05:26,700 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1365 states, 1347 states have (on average 1.821826280623608) internal successors, (2454), 1347 states have internal predecessors, (2454), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14)
[2023-04-01 10:05:26,732 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2477 transitions.
[2023-04-01 10:05:26,733 INFO  L78                 Accepts]: Start accepts. Automaton has 1365 states and 2477 transitions. Word has length 11
[2023-04-01 10:05:26,733 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:05:26,733 INFO  L495      AbstractCegarLoop]: Abstraction has 1365 states and 2477 transitions.
[2023-04-01 10:05:26,733 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 10:05:26,734 INFO  L276                IsEmpty]: Start isEmpty. Operand 1365 states and 2477 transitions.
[2023-04-01 10:05:26,735 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2023-04-01 10:05:26,735 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:05:26,735 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:05:26,735 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:05:26,736 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:05:26,736 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:05:26,736 INFO  L85        PathProgramCache]: Analyzing trace with hash 1012507960, now seen corresponding path program 1 times
[2023-04-01 10:05:26,736 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:05:26,736 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665193787]
[2023-04-01 10:05:26,736 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:05:26,737 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:05:26,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:05:26,874 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:05:26,875 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:05:26,876 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665193787]
[2023-04-01 10:05:26,876 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665193787] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:05:26,876 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:05:26,876 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:05:26,877 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584312884]
[2023-04-01 10:05:26,877 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:05:26,878 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:05:26,878 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:05:26,878 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:05:26,879 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:05:26,879 INFO  L87              Difference]: Start difference. First operand 1365 states and 2477 transitions. Second operand  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-01 10:05:29,583 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:05:29,583 INFO  L93              Difference]: Finished difference Result 4081 states and 7455 transitions.
[2023-04-01 10:05:29,584 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:05:29,584 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27
[2023-04-01 10:05:29,584 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:05:29,592 INFO  L225             Difference]: With dead ends: 4081
[2023-04-01 10:05:29,593 INFO  L226             Difference]: Without dead ends: 2721
[2023-04-01 10:05:29,595 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:05:29,596 INFO  L413           NwaCegarLoop]: 1214 mSDtfsCounter, 686 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time
[2023-04-01 10:05:29,596 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1242 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time]
[2023-04-01 10:05:29,598 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2721 states.
[2023-04-01 10:05:29,638 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2718.
[2023-04-01 10:05:29,642 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2718 states, 2688 states have (on average 1.6986607142857142) internal successors, (4566), 2688 states have internal predecessors, (4566), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (50), 14 states have call predecessors, (50), 14 states have call successors, (50)
[2023-04-01 10:05:29,651 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 4631 transitions.
[2023-04-01 10:05:29,651 INFO  L78                 Accepts]: Start accepts. Automaton has 2718 states and 4631 transitions. Word has length 27
[2023-04-01 10:05:29,651 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:05:29,652 INFO  L495      AbstractCegarLoop]: Abstraction has 2718 states and 4631 transitions.
[2023-04-01 10:05:29,652 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-01 10:05:29,652 INFO  L276                IsEmpty]: Start isEmpty. Operand 2718 states and 4631 transitions.
[2023-04-01 10:05:29,653 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2023-04-01 10:05:29,653 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:05:29,653 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:05:29,653 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:05:29,653 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:05:29,653 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:05:29,653 INFO  L85        PathProgramCache]: Analyzing trace with hash -9582480, now seen corresponding path program 1 times
[2023-04-01 10:05:29,654 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:05:29,654 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111292216]
[2023-04-01 10:05:29,654 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:05:29,654 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:05:29,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:05:29,781 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:05:29,781 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:05:29,781 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111292216]
[2023-04-01 10:05:29,781 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111292216] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:05:29,781 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:05:29,781 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:05:29,781 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335521407]
[2023-04-01 10:05:29,781 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:05:29,782 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:05:29,782 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:05:29,782 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:05:29,782 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:05:29,783 INFO  L87              Difference]: Start difference. First operand 2718 states and 4631 transitions. Second operand  has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:05:33,251 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:05:33,251 INFO  L93              Difference]: Finished difference Result 8254 states and 14243 transitions.
[2023-04-01 10:05:33,251 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-04-01 10:05:33,251 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31
[2023-04-01 10:05:33,252 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:05:33,273 INFO  L225             Difference]: With dead ends: 8254
[2023-04-01 10:05:33,273 INFO  L226             Difference]: Without dead ends: 5541
[2023-04-01 10:05:33,280 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-04-01 10:05:33,281 INFO  L413           NwaCegarLoop]: 30 mSDtfsCounter, 2798 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2798 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 4355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 3685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time
[2023-04-01 10:05:33,281 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2798 Valid, 86 Invalid, 4355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 3685 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time]
[2023-04-01 10:05:33,286 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5541 states.
[2023-04-01 10:05:33,376 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 5489.
[2023-04-01 10:05:33,384 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5489 states, 5409 states have (on average 1.5289332593825107) internal successors, (8270), 5419 states have internal predecessors, (8270), 27 states have call successors, (27), 27 states have call predecessors, (27), 52 states have return successors, (247), 42 states have call predecessors, (247), 26 states have call successors, (247)
[2023-04-01 10:05:33,401 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 8544 transitions.
[2023-04-01 10:05:33,401 INFO  L78                 Accepts]: Start accepts. Automaton has 5489 states and 8544 transitions. Word has length 31
[2023-04-01 10:05:33,401 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:05:33,401 INFO  L495      AbstractCegarLoop]: Abstraction has 5489 states and 8544 transitions.
[2023-04-01 10:05:33,402 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:05:33,402 INFO  L276                IsEmpty]: Start isEmpty. Operand 5489 states and 8544 transitions.
[2023-04-01 10:05:33,408 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2023-04-01 10:05:33,408 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:05:33,408 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:05:33,408 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 10:05:33,409 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:05:33,410 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:05:33,410 INFO  L85        PathProgramCache]: Analyzing trace with hash 1237161733, now seen corresponding path program 1 times
[2023-04-01 10:05:33,410 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:05:33,410 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459177189]
[2023-04-01 10:05:33,410 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:05:33,410 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:05:33,436 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:05:33,559 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:05:33,560 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:05:33,560 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459177189]
[2023-04-01 10:05:33,560 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459177189] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:05:33,560 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:05:33,560 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:05:33,560 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807477530]
[2023-04-01 10:05:33,560 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:05:33,561 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:05:33,561 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:05:33,562 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:05:33,562 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:05:33,562 INFO  L87              Difference]: Start difference. First operand 5489 states and 8544 transitions. Second operand  has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:05:37,091 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:05:37,091 INFO  L93              Difference]: Finished difference Result 16764 states and 27180 transitions.
[2023-04-01 10:05:37,094 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-04-01 10:05:37,095 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42
[2023-04-01 10:05:37,095 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:05:37,139 INFO  L225             Difference]: With dead ends: 16764
[2023-04-01 10:05:37,140 INFO  L226             Difference]: Without dead ends: 11280
[2023-04-01 10:05:37,155 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-04-01 10:05:37,156 INFO  L413           NwaCegarLoop]: 33 mSDtfsCounter, 2161 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 4071 mSolverCounterSat, 710 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2161 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 4781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 4071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time
[2023-04-01 10:05:37,156 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2161 Valid, 85 Invalid, 4781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 4071 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time]
[2023-04-01 10:05:37,166 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11280 states.
[2023-04-01 10:05:37,404 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11280 to 10967.
[2023-04-01 10:05:37,419 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10967 states, 10721 states have (on average 1.3593881167801511) internal successors, (14574), 10776 states have internal predecessors, (14574), 51 states have call successors, (51), 51 states have call predecessors, (51), 194 states have return successors, (1255), 139 states have call predecessors, (1255), 50 states have call successors, (1255)
[2023-04-01 10:05:37,441 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 15880 transitions.
[2023-04-01 10:05:37,442 INFO  L78                 Accepts]: Start accepts. Automaton has 10967 states and 15880 transitions. Word has length 42
[2023-04-01 10:05:37,442 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:05:37,442 INFO  L495      AbstractCegarLoop]: Abstraction has 10967 states and 15880 transitions.
[2023-04-01 10:05:37,443 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:05:37,443 INFO  L276                IsEmpty]: Start isEmpty. Operand 10967 states and 15880 transitions.
[2023-04-01 10:05:37,446 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2023-04-01 10:05:37,446 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:05:37,446 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:05:37,446 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 10:05:37,446 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:05:37,446 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:05:37,447 INFO  L85        PathProgramCache]: Analyzing trace with hash -1403768884, now seen corresponding path program 1 times
[2023-04-01 10:05:37,447 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:05:37,447 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978309727]
[2023-04-01 10:05:37,447 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:05:37,447 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:05:37,464 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:05:37,648 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:05:37,648 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:05:37,648 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978309727]
[2023-04-01 10:05:37,648 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978309727] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:05:37,648 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:05:37,648 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:05:37,649 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069291390]
[2023-04-01 10:05:37,649 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:05:37,650 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:05:37,650 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:05:37,650 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:05:37,652 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:05:37,652 INFO  L87              Difference]: Start difference. First operand 10967 states and 15880 transitions. Second operand  has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:05:40,933 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:05:40,933 INFO  L93              Difference]: Finished difference Result 31960 states and 49363 transitions.
[2023-04-01 10:05:40,934 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:05:40,934 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65
[2023-04-01 10:05:40,934 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:05:41,011 INFO  L225             Difference]: With dead ends: 31960
[2023-04-01 10:05:41,011 INFO  L226             Difference]: Without dead ends: 20998
[2023-04-01 10:05:41,034 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-04-01 10:05:41,035 INFO  L413           NwaCegarLoop]: 42 mSDtfsCounter, 2392 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2392 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 5044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1284 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time
[2023-04-01 10:05:41,036 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2392 Valid, 101 Invalid, 5044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1284 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time]
[2023-04-01 10:05:41,056 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20998 states.
[2023-04-01 10:05:41,532 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20998 to 20784.
[2023-04-01 10:05:41,568 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20784 states, 20289 states have (on average 1.3296860367686925) internal successors, (26978), 20420 states have internal predecessors, (26978), 94 states have call successors, (94), 94 states have call predecessors, (94), 400 states have return successors, (3305), 269 states have call predecessors, (3305), 93 states have call successors, (3305)
[2023-04-01 10:05:41,611 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20784 states to 20784 states and 30377 transitions.
[2023-04-01 10:05:41,612 INFO  L78                 Accepts]: Start accepts. Automaton has 20784 states and 30377 transitions. Word has length 65
[2023-04-01 10:05:41,613 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:05:41,613 INFO  L495      AbstractCegarLoop]: Abstraction has 20784 states and 30377 transitions.
[2023-04-01 10:05:41,614 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:05:41,614 INFO  L276                IsEmpty]: Start isEmpty. Operand 20784 states and 30377 transitions.
[2023-04-01 10:05:41,615 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 91
[2023-04-01 10:05:41,615 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:05:41,615 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:05:41,615 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-04-01 10:05:41,616 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:05:41,616 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:05:41,616 INFO  L85        PathProgramCache]: Analyzing trace with hash -1307487611, now seen corresponding path program 1 times
[2023-04-01 10:05:41,616 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:05:41,616 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708988588]
[2023-04-01 10:05:41,616 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:05:41,616 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:05:41,651 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:05:41,790 INFO  L134       CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2023-04-01 10:05:41,790 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:05:41,790 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708988588]
[2023-04-01 10:05:41,790 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708988588] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:05:41,791 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620975368]
[2023-04-01 10:05:41,791 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:05:41,791 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:05:41,791 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:05:41,794 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 10:05:41,797 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-01 10:05:41,901 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:05:41,905 INFO  L262         TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:05:41,911 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:05:41,992 INFO  L134       CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 10:05:41,993 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:05:42,125 INFO  L134       CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2023-04-01 10:05:42,125 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [620975368] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:05:42,126 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416280405]
[2023-04-01 10:05:42,178 INFO  L159        IcfgInterpreter]: Started Sifa with 50 locations of interest
[2023-04-01 10:05:42,179 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:05:42,181 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:05:42,184 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:05:42,185 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:05:42,383 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs
[2023-04-01 10:05:42,535 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 35
[2023-04-01 10:05:46,817 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 26
[2023-04-01 10:06:00,767 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 744668 conjuctions. This might take some time...