/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/Problem18_label15.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:29:38,394 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 10:29:38,396 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 10:29:38,431 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 10:29:38,433 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 10:29:38,436 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 10:29:38,438 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-04-01 10:29:38,445 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 10:29:38,464 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 10:29:38,469 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 10:29:38,470 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:29:38,471 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 10:29:38,495 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:29:38,495 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:29:38,495 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:29:38,495 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:29:38,496 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:29:38,496 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:29:38,496 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:29:38,496 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:29:38,496 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:29:38,496 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:29:38,497 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:29:38,497 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:29:38,497 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:29:38,497 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:29:38,497 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:29:38,498 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:29:38,498 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:29:38,498 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:29:38,498 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:29:38,498 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:29:38,498 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:29:38,498 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:29:38,498 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:29:38,499 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:29:38,499 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:29:38,499 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:29:38,499 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:29:38,499 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:29:38,499 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:29:38,499 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:29:38,499 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:29:38,499 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:29:38,499 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:29:38,500 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:29:38,500 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:29:38,500 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:29:38,500 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:29:38,500 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:29:38,500 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:29:38,500 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:29:38,500 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:29:38,500 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:29:38,669 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:29:38,682 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:29:38,684 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:29:38,684 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:29:38,685 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:29:38,685 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label15.c
[2023-04-01 10:29:39,674 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:29:39,987 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:29:39,987 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label15.c
[2023-04-01 10:29:40,020 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e48b78f9/87ca435c72aa44339a87eea184114213/FLAG714f9521a
[2023-04-01 10:29:40,251 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e48b78f9/87ca435c72aa44339a87eea184114213
[2023-04-01 10:29:40,253 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:29:40,254 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:29:40,255 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:29:40,255 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:29:40,257 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:29:40,258 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:29:40" (1/1) ...
[2023-04-01 10:29:40,259 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3990f068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:40, skipping insertion in model container
[2023-04-01 10:29:40,259 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:29:40" (1/1) ...
[2023-04-01 10:29:40,264 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:29:40,343 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:29:40,518 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/Problem18_label15.c[3868,3881]
[2023-04-01 10:29:40,991 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:29:41,001 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:29:41,022 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/Problem18_label15.c[3868,3881]
[2023-04-01 10:29:41,248 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:29:41,262 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:29:41,262 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41 WrapperNode
[2023-04-01 10:29:41,262 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:29:41,263 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:29:41,263 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:29:41,263 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:29:41,271 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41" (1/1) ...
[2023-04-01 10:29:41,271 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41" (1/1) ...
[2023-04-01 10:29:41,305 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41" (1/1) ...
[2023-04-01 10:29:41,305 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41" (1/1) ...
[2023-04-01 10:29:41,354 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41" (1/1) ...
[2023-04-01 10:29:41,373 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41" (1/1) ...
[2023-04-01 10:29:41,389 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41" (1/1) ...
[2023-04-01 10:29:41,399 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41" (1/1) ...
[2023-04-01 10:29:41,413 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:29:41,414 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:29:41,414 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:29:41,414 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:29:41,415 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41" (1/1) ...
[2023-04-01 10:29:41,421 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:29:41,428 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:29:41,438 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 10:29:41,501 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 10:29:41,522 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:29:41,523 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:29:41,523 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:29:41,523 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:29:41,523 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:29:41,523 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 10:29:41,523 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:29:41,523 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:29:41,523 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:29:41,523 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 10:29:41,523 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:29:41,523 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:29:41,523 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:29:41,523 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:29:41,523 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:29:41,523 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:29:41,523 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:29:41,524 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:29:41,524 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:29:41,524 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:29:41,524 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:29:41,524 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:29:41,524 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:29:41,596 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:29:41,598 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:29:43,917 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:29:50,037 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:29:50,037 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:29:50,040 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:29:50 BoogieIcfgContainer
[2023-04-01 10:29:50,040 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:29:50,041 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:29:50,041 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:29:50,043 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:29:50,044 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:29:40" (1/3) ...
[2023-04-01 10:29:50,044 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742e64a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:29:50, skipping insertion in model container
[2023-04-01 10:29:50,044 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41" (2/3) ...
[2023-04-01 10:29:50,044 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742e64a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:29:50, skipping insertion in model container
[2023-04-01 10:29:50,044 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:29:50" (3/3) ...
[2023-04-01 10:29:50,045 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem18_label15.c
[2023-04-01 10:29:50,058 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:29:50,058 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:29:50,104 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:29:50,110 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;@2c1806bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:29:50,111 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:29:50,116 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2023-04-01 10:29:50,122 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:29:50,122 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:29:50,122 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:29:50,123 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:29:50,127 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:29:50,127 INFO  L85        PathProgramCache]: Analyzing trace with hash 510744036, now seen corresponding path program 1 times
[2023-04-01 10:29:50,135 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:29:50,136 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779890202]
[2023-04-01 10:29:50,136 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:50,136 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:29:50,216 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:50,436 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 10:29:50,436 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:29:50,436 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779890202]
[2023-04-01 10:29:50,437 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779890202] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:29:50,437 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:29:50,437 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:29:50,438 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169990498]
[2023-04-01 10:29:50,438 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:29:50,442 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:29:50,442 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:29:50,467 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:29:50,468 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:29:50,470 INFO  L87              Difference]: Start difference. First operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 10:29:52,363 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:29:52,363 INFO  L93              Difference]: Finished difference Result 1393 states and 2727 transitions.
[2023-04-01 10:29:52,366 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:29:52,367 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 10:29:52,367 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:29:52,387 INFO  L225             Difference]: With dead ends: 1393
[2023-04-01 10:29:52,388 INFO  L226             Difference]: Without dead ends: 921
[2023-04-01 10:29:52,396 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 10:29:52,399 INFO  L413           NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time
[2023-04-01 10:29:52,399 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time]
[2023-04-01 10:29:52,414 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 921 states.
[2023-04-01 10:29:52,470 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919.
[2023-04-01 10:29:52,472 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10)
[2023-04-01 10:29:52,476 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions.
[2023-04-01 10:29:52,478 INFO  L78                 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11
[2023-04-01 10:29:52,478 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:29:52,478 INFO  L495      AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions.
[2023-04-01 10:29:52,479 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 10:29:52,479 INFO  L276                IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions.
[2023-04-01 10:29:52,480 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2023-04-01 10:29:52,480 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:29:52,480 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:29:52,480 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:29:52,480 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:29:52,481 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:29:52,481 INFO  L85        PathProgramCache]: Analyzing trace with hash -988448758, now seen corresponding path program 1 times
[2023-04-01 10:29:52,481 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:29:52,481 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008255536]
[2023-04-01 10:29:52,482 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:52,482 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:29:52,498 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:52,581 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 10:29:52,581 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:29:52,581 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008255536]
[2023-04-01 10:29:52,582 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008255536] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:29:52,582 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:29:52,582 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:29:52,582 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60497491]
[2023-04-01 10:29:52,582 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:29:52,583 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:29:52,583 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:29:52,583 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:29:52,584 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:29:52,584 INFO  L87              Difference]: Start difference. First operand 919 states and 1512 transitions. Second operand  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 10:29:55,086 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:29:55,086 INFO  L93              Difference]: Finished difference Result 2781 states and 4622 transitions.
[2023-04-01 10:29:55,101 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:29:55,101 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21
[2023-04-01 10:29:55,101 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:29:55,110 INFO  L225             Difference]: With dead ends: 2781
[2023-04-01 10:29:55,110 INFO  L226             Difference]: Without dead ends: 1867
[2023-04-01 10:29:55,113 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 10:29:55,113 INFO  L413           NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time
[2023-04-01 10:29:55,114 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time]
[2023-04-01 10:29:55,116 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1867 states.
[2023-04-01 10:29:55,162 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822.
[2023-04-01 10:29:55,165 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50)
[2023-04-01 10:29:55,170 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions.
[2023-04-01 10:29:55,171 INFO  L78                 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21
[2023-04-01 10:29:55,171 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:29:55,171 INFO  L495      AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions.
[2023-04-01 10:29:55,171 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 10:29:55,171 INFO  L276                IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions.
[2023-04-01 10:29:55,172 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2023-04-01 10:29:55,172 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:29:55,172 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]
[2023-04-01 10:29:55,172 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:29:55,172 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:29:55,173 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:29:55,173 INFO  L85        PathProgramCache]: Analyzing trace with hash 973692354, now seen corresponding path program 1 times
[2023-04-01 10:29:55,173 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:29:55,173 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694044768]
[2023-04-01 10:29:55,173 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:55,173 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:29:55,184 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:55,253 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 10:29:55,253 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:29:55,253 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694044768]
[2023-04-01 10:29:55,253 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694044768] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:29:55,253 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:29:55,253 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:29:55,254 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605893029]
[2023-04-01 10:29:55,254 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:29:55,254 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:29:55,254 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:29:55,254 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:29:55,255 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:29:55,255 INFO  L87              Difference]: Start difference. First operand 1822 states and 2823 transitions. Second operand  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 10:29:57,366 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:29:57,367 INFO  L93              Difference]: Finished difference Result 5051 states and 8054 transitions.
[2023-04-01 10:29:57,367 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:29:57,367 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25
[2023-04-01 10:29:57,368 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:29:57,380 INFO  L225             Difference]: With dead ends: 5051
[2023-04-01 10:29:57,380 INFO  L226             Difference]: Without dead ends: 3234
[2023-04-01 10:29:57,385 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 10:29:57,386 INFO  L413           NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time
[2023-04-01 10:29:57,386 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time]
[2023-04-01 10:29:57,389 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3234 states.
[2023-04-01 10:29:57,446 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207.
[2023-04-01 10:29:57,450 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145)
[2023-04-01 10:29:57,460 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions.
[2023-04-01 10:29:57,461 INFO  L78                 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25
[2023-04-01 10:29:57,461 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:29:57,461 INFO  L495      AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions.
[2023-04-01 10:29:57,461 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 10:29:57,461 INFO  L276                IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions.
[2023-04-01 10:29:57,463 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2023-04-01 10:29:57,463 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:29:57,464 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]
[2023-04-01 10:29:57,464 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 10:29:57,464 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:29:57,466 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:29:57,466 INFO  L85        PathProgramCache]: Analyzing trace with hash -1098126571, now seen corresponding path program 1 times
[2023-04-01 10:29:57,466 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:29:57,466 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300120452]
[2023-04-01 10:29:57,466 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:57,467 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:29:57,488 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:57,659 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 10:29:57,659 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:29:57,659 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300120452]
[2023-04-01 10:29:57,659 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300120452] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:29:57,660 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:29:57,660 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:29:57,660 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818572229]
[2023-04-01 10:29:57,660 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:29:57,661 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:29:57,661 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:29:57,661 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:29:57,662 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:29:57,662 INFO  L87              Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 10:29:59,528 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:29:59,529 INFO  L93              Difference]: Finished difference Result 9134 states and 12952 transitions.
[2023-04-01 10:29:59,529 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:29:59,529 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 58
[2023-04-01 10:29:59,529 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:29:59,562 INFO  L225             Difference]: With dead ends: 9134
[2023-04-01 10:29:59,562 INFO  L226             Difference]: Without dead ends: 5932
[2023-04-01 10:29:59,569 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 10:29:59,587 INFO  L413           NwaCegarLoop]: 816 mSDtfsCounter, 450 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time
[2023-04-01 10:29:59,587 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 838 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time]
[2023-04-01 10:29:59,593 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5932 states.
[2023-04-01 10:29:59,686 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 5792.
[2023-04-01 10:29:59,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5792 states, 5701 states have (on average 1.278196807577618) internal successors, (7287), 5722 states have internal predecessors, (7287), 29 states have call successors, (29), 29 states have call predecessors, (29), 61 states have return successors, (355), 40 states have call predecessors, (355), 28 states have call successors, (355)
[2023-04-01 10:29:59,709 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 7671 transitions.
[2023-04-01 10:29:59,710 INFO  L78                 Accepts]: Start accepts. Automaton has 5792 states and 7671 transitions. Word has length 58
[2023-04-01 10:29:59,711 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:29:59,711 INFO  L495      AbstractCegarLoop]: Abstraction has 5792 states and 7671 transitions.
[2023-04-01 10:29:59,711 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 10:29:59,711 INFO  L276                IsEmpty]: Start isEmpty. Operand 5792 states and 7671 transitions.
[2023-04-01 10:29:59,717 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2023-04-01 10:29:59,717 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:29:59,718 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2023-04-01 10:29:59,718 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 10:29:59,719 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:29:59,719 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:29:59,719 INFO  L85        PathProgramCache]: Analyzing trace with hash -1476628692, now seen corresponding path program 1 times
[2023-04-01 10:29:59,719 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:29:59,719 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440836708]
[2023-04-01 10:29:59,720 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:59,720 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:29:59,753 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:59,877 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:29:59,877 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:29:59,877 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440836708]
[2023-04-01 10:29:59,877 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440836708] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:29:59,878 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662426288]
[2023-04-01 10:29:59,878 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:29:59,878 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:29:59,878 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:29:59,881 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 10:29:59,886 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 10:29:59,967 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:29:59,970 INFO  L262         TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:29:59,975 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:30:00,043 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:30:00,043 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:30:00,149 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:30:00,149 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662426288] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:30:00,149 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1324057771]
[2023-04-01 10:30:00,185 INFO  L159        IcfgInterpreter]: Started Sifa with 54 locations of interest
[2023-04-01 10:30:00,185 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:30:00,187 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:30:00,190 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:30:00,191 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:30:00,435 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs
[2023-04-01 10:30:00,613 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 29
[2023-04-01 10:30:03,843 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 32
[2023-04-01 10:30:26,362 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 558564 conjuctions. This might take some time...