/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label24.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-03-31 21:14:37,392 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-03-31 21:14:37,393 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-03-31 21:14:37,416 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-03-31 21:14:37,416 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-03-31 21:14:37,419 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-03-31 21:14:37,422 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2023-03-31 21:14:37,428 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-03-31 21:14:37,429 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-03-31 21:14:37,431 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-03-31 21:14:37,436 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-03-31 21:14:37,437 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-03-31 21:14:37,437 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-03-31 21:14:37,438 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2023-03-31 21:14:37,445 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-03-31 21:14:37,451 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-03-31 21:14:37,457 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-03-31 21:14:37,458 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-03-31 21:14:37,459 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
[2023-03-31 21:14:37,488 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-03-31 21:14:37,488 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-03-31 21:14:37,488 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-03-31 21:14:37,489 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-03-31 21:14:37,489 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-03-31 21:14:37,489 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-03-31 21:14:37,489 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-03-31 21:14:37,490 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-03-31 21:14:37,490 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-03-31 21:14:37,490 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-03-31 21:14:37,490 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-03-31 21:14:37,490 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-03-31 21:14:37,491 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-03-31 21:14:37,491 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-03-31 21:14:37,491 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-03-31 21:14:37,491 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-03-31 21:14:37,491 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-03-31 21:14:37,491 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-03-31 21:14:37,491 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-03-31 21:14:37,492 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-03-31 21:14:37,492 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-03-31 21:14:37,492 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-03-31 21:14:37,492 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-03-31 21:14:37,492 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-03-31 21:14:37,492 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-03-31 21:14:37,492 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-03-31 21:14:37,492 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-03-31 21:14:37,492 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-03-31 21:14:37,493 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-03-31 21:14:37,493 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-03-31 21:14:37,493 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-03-31 21:14:37,493 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-03-31 21:14:37,493 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 21:14:37,493 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-03-31 21:14:37,493 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-03-31 21:14:37,493 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-03-31 21:14:37,493 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-03-31 21:14:37,493 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-03-31 21:14:37,494 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-03-31 21:14:37,494 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-03-31 21:14:37,494 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-03-31 21:14:37,494 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-03-31 21:14:37,673 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-03-31 21:14:37,689 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-03-31 21:14:37,691 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-03-31 21:14:37,691 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-03-31 21:14:37,692 INFO  L275        PluginConnector]: CDTParser initialized
[2023-03-31 21:14:37,693 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label24.c
[2023-03-31 21:14:38,742 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-03-31 21:14:38,945 INFO  L351              CDTParser]: Found 1 translation units.
[2023-03-31 21:14:38,945 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label24.c
[2023-03-31 21:14:38,951 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cd5ccb78/11adfaa404624778a2091abb93b340ba/FLAG13a79326f
[2023-03-31 21:14:38,962 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cd5ccb78/11adfaa404624778a2091abb93b340ba
[2023-03-31 21:14:38,964 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-03-31 21:14:38,965 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-03-31 21:14:38,966 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-03-31 21:14:38,966 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-03-31 21:14:38,978 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-03-31 21:14:38,979 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:14:38" (1/1) ...
[2023-03-31 21:14:38,980 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f6e2aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:38, skipping insertion in model container
[2023-03-31 21:14:38,980 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:14:38" (1/1) ...
[2023-03-31 21:14:38,984 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-03-31 21:14:39,015 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-03-31 21:14:39,207 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/Problem02_label24.c[18375,18388]
[2023-03-31 21:14:39,246 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 21:14:39,254 INFO  L203         MainTranslator]: Completed pre-run
[2023-03-31 21:14:39,311 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/Problem02_label24.c[18375,18388]
[2023-03-31 21:14:39,321 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 21:14:39,335 INFO  L208         MainTranslator]: Completed translation
[2023-03-31 21:14:39,335 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:39 WrapperNode
[2023-03-31 21:14:39,335 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-03-31 21:14:39,336 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-03-31 21:14:39,336 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-03-31 21:14:39,336 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-03-31 21:14:39,344 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:39" (1/1) ...
[2023-03-31 21:14:39,344 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:39" (1/1) ...
[2023-03-31 21:14:39,361 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:39" (1/1) ...
[2023-03-31 21:14:39,361 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:39" (1/1) ...
[2023-03-31 21:14:39,381 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:39" (1/1) ...
[2023-03-31 21:14:39,388 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:39" (1/1) ...
[2023-03-31 21:14:39,393 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:39" (1/1) ...
[2023-03-31 21:14:39,403 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:39" (1/1) ...
[2023-03-31 21:14:39,409 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-03-31 21:14:39,410 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-03-31 21:14:39,410 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-03-31 21:14:39,410 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-03-31 21:14:39,410 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:39" (1/1) ...
[2023-03-31 21:14:39,424 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 21:14:39,433 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 21:14:39,449 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)
[2023-03-31 21:14:39,453 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
[2023-03-31 21:14:39,474 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-03-31 21:14:39,474 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-03-31 21:14:39,474 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-03-31 21:14:39,474 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-03-31 21:14:39,474 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-03-31 21:14:39,474 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-03-31 21:14:39,474 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-03-31 21:14:39,474 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-03-31 21:14:39,474 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-03-31 21:14:39,475 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-03-31 21:14:39,475 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-03-31 21:14:39,475 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-03-31 21:14:39,475 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-03-31 21:14:39,475 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-03-31 21:14:39,475 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-03-31 21:14:39,475 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-03-31 21:14:39,475 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-03-31 21:14:39,475 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-03-31 21:14:39,475 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-03-31 21:14:39,550 INFO  L236             CfgBuilder]: Building ICFG
[2023-03-31 21:14:39,552 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-03-31 21:14:40,324 INFO  L277             CfgBuilder]: Performing block encoding
[2023-03-31 21:14:40,493 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-03-31 21:14:40,493 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-03-31 21:14:40,495 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:14:40 BoogieIcfgContainer
[2023-03-31 21:14:40,495 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-03-31 21:14:40,497 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-03-31 21:14:40,497 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-03-31 21:14:40,499 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-03-31 21:14:40,500 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:14:38" (1/3) ...
[2023-03-31 21:14:40,500 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b66c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:14:40, skipping insertion in model container
[2023-03-31 21:14:40,500 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:39" (2/3) ...
[2023-03-31 21:14:40,500 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b66c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:14:40, skipping insertion in model container
[2023-03-31 21:14:40,500 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:14:40" (3/3) ...
[2023-03-31 21:14:40,501 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem02_label24.c
[2023-03-31 21:14:40,512 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-03-31 21:14:40,512 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-03-31 21:14:40,552 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-03-31 21:14:40,556 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;@4467944b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-03-31 21:14:40,557 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-03-31 21:14:40,561 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2023-03-31 21:14:40,570 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 87
[2023-03-31 21:14:40,570 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 21:14:40,570 INFO  L195           NwaCegarLoop]: trace histogram [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, 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]
[2023-03-31 21:14:40,571 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 21:14:40,574 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 21:14:40,574 INFO  L85        PathProgramCache]: Analyzing trace with hash -2027408424, now seen corresponding path program 1 times
[2023-03-31 21:14:40,580 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 21:14:40,580 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741199147]
[2023-03-31 21:14:40,580 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 21:14:40,581 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 21:14:40,700 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 21:14:41,075 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:14:41,075 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 21:14:41,076 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741199147]
[2023-03-31 21:14:41,077 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741199147] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 21:14:41,077 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 21:14:41,077 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-03-31 21:14:41,078 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690754330]
[2023-03-31 21:14:41,079 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 21:14:41,084 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-03-31 21:14:41,084 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 21:14:41,110 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-03-31 21:14:41,111 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 21:14:41,113 INFO  L87              Difference]: Start difference. First operand  has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand  has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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)
[2023-03-31 21:14:41,473 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 21:14:41,473 INFO  L93              Difference]: Finished difference Result 273 states and 508 transitions.
[2023-03-31 21:14:41,474 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-03-31 21:14:41,475 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86
[2023-03-31 21:14:41,475 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 21:14:41,486 INFO  L225             Difference]: With dead ends: 273
[2023-03-31 21:14:41,486 INFO  L226             Difference]: Without dead ends: 175
[2023-03-31 21:14:41,488 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
[2023-03-31 21:14:41,490 INFO  L413           NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-03-31 21:14:41,491 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 30 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-03-31 21:14:41,504 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 175 states.
[2023-03-31 21:14:41,542 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175.
[2023-03-31 21:14:41,545 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 175 states, 167 states have (on average 1.904191616766467) internal successors, (318), 167 states have internal predecessors, (318), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)
[2023-03-31 21:14:41,553 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions.
[2023-03-31 21:14:41,555 INFO  L78                 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86
[2023-03-31 21:14:41,555 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 21:14:41,556 INFO  L495      AbstractCegarLoop]: Abstraction has 175 states and 327 transitions.
[2023-03-31 21:14:41,556 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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)
[2023-03-31 21:14:41,557 INFO  L276                IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions.
[2023-03-31 21:14:41,564 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2023-03-31 21:14:41,565 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 21:14:41,565 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 21:14:41,565 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-03-31 21:14:41,566 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 21:14:41,566 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 21:14:41,566 INFO  L85        PathProgramCache]: Analyzing trace with hash -38918914, now seen corresponding path program 1 times
[2023-03-31 21:14:41,566 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 21:14:41,567 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734322381]
[2023-03-31 21:14:41,567 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 21:14:41,567 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 21:14:41,598 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 21:14:41,769 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:14:41,769 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 21:14:41,770 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734322381]
[2023-03-31 21:14:41,770 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734322381] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 21:14:41,770 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 21:14:41,770 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-31 21:14:41,770 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981309811]
[2023-03-31 21:14:41,771 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 21:14:41,772 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 21:14:41,772 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 21:14:41,773 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 21:14:41,773 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-03-31 21:14:41,773 INFO  L87              Difference]: Start difference. First operand 175 states and 327 transitions. Second operand  has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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)
[2023-03-31 21:14:42,139 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 21:14:42,139 INFO  L93              Difference]: Finished difference Result 531 states and 1004 transitions.
[2023-03-31 21:14:42,140 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-03-31 21:14:42,140 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 101
[2023-03-31 21:14:42,140 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 21:14:42,143 INFO  L225             Difference]: With dead ends: 531
[2023-03-31 21:14:42,143 INFO  L226             Difference]: Without dead ends: 361
[2023-03-31 21:14:42,144 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
[2023-03-31 21:14:42,145 INFO  L413           NwaCegarLoop]: 19 mSDtfsCounter, 364 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-03-31 21:14:42,145 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 51 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-03-31 21:14:42,146 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 361 states.
[2023-03-31 21:14:42,159 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 353.
[2023-03-31 21:14:42,159 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 353 states, 336 states have (on average 1.8095238095238095) internal successors, (608), 341 states have internal predecessors, (608), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21)
[2023-03-31 21:14:42,161 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 635 transitions.
[2023-03-31 21:14:42,161 INFO  L78                 Accepts]: Start accepts. Automaton has 353 states and 635 transitions. Word has length 101
[2023-03-31 21:14:42,161 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 21:14:42,161 INFO  L495      AbstractCegarLoop]: Abstraction has 353 states and 635 transitions.
[2023-03-31 21:14:42,161 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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)
[2023-03-31 21:14:42,161 INFO  L276                IsEmpty]: Start isEmpty. Operand 353 states and 635 transitions.
[2023-03-31 21:14:42,162 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2023-03-31 21:14:42,163 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 21:14:42,163 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 21:14:42,163 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-03-31 21:14:42,163 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 21:14:42,163 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 21:14:42,163 INFO  L85        PathProgramCache]: Analyzing trace with hash -1311016014, now seen corresponding path program 1 times
[2023-03-31 21:14:42,164 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 21:14:42,164 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58283384]
[2023-03-31 21:14:42,164 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 21:14:42,164 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 21:14:42,190 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 21:14:42,531 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-03-31 21:14:42,531 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 21:14:42,531 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58283384]
[2023-03-31 21:14:42,531 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58283384] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 21:14:42,532 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176531092]
[2023-03-31 21:14:42,533 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 21:14:42,533 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 21:14:42,533 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 21:14:42,535 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)
[2023-03-31 21:14:42,552 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-03-31 21:14:42,644 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 21:14:42,647 INFO  L262         TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-03-31 21:14:42,652 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 21:14:42,724 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:14:42,724 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 21:14:42,803 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 21:14:42,804 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176531092] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 21:14:42,804 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465468075]
[2023-03-31 21:14:42,819 INFO  L159        IcfgInterpreter]: Started Sifa with 90 locations of interest
[2023-03-31 21:14:42,819 INFO  L166        IcfgInterpreter]: Building call graph
[2023-03-31 21:14:42,821 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-03-31 21:14:42,824 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-03-31 21:14:42,825 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-03-31 21:14:43,047 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs
[2023-03-31 21:14:43,776 INFO  L197        IcfgInterpreter]: Interpreting procedure calculate_output with input of size 77 for LOIs
[2023-03-31 21:15:46,239 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 35
[2023-03-31 21:15:47,120 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 58880 conjuctions. This might take some time...