/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/Problem13_label13.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:07:27,916 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2023-04-01 10:07:27,951 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2023-04-01 10:07:27,958 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 10:07:27,987 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 10:07:27,987 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:07:27,992 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 10:07:28,011 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:07:28,011 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:07:28,011 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:07:28,011 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:07:28,012 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:07:28,012 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:07:28,012 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:07:28,012 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:07:28,012 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:07:28,012 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:07:28,012 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:07:28,015 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:07:28,015 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:07:28,016 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:07:28,016 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:07:28,016 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:07:28,016 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:07:28,016 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:07:28,017 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:07:28,017 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:07:28,017 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:07:28,020 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:07:28,021 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:07:28,021 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:07:28,021 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:07:28,021 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:07:28,021 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:07:28,021 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:07:28,022 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:07:28,022 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:07:28,022 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:07:28,022 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:07:28,022 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:07:28,022 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:07:28,022 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:07:28,022 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:07:28,023 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:07:28,023 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:07:28,023 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:07:28,023 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:07:28,023 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:07:28,024 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:07:28,188 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:07:28,213 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:07:28,215 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:07:28,215 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:07:28,216 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:07:28,216 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label13.c
[2023-04-01 10:07:29,241 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:07:29,674 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:07:29,675 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label13.c
[2023-04-01 10:07:29,711 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f260470d/4842aee79c4c4ff1a00b28844e8350cb/FLAG2e3336827
[2023-04-01 10:07:29,720 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f260470d/4842aee79c4c4ff1a00b28844e8350cb
[2023-04-01 10:07:29,722 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:07:29,723 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:07:29,724 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:07:29,724 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:07:29,726 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:07:29,726 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:07:29" (1/1) ...
[2023-04-01 10:07:29,727 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c0a116c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:29, skipping insertion in model container
[2023-04-01 10:07:29,727 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:07:29" (1/1) ...
[2023-04-01 10:07:29,731 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:07:29,817 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:07:30,026 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/Problem13_label13.c[8099,8112]
[2023-04-01 10:07:30,621 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:07:30,632 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:07:30,656 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/Problem13_label13.c[8099,8112]
[2023-04-01 10:07:31,015 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:07:31,032 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:07:31,033 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:31 WrapperNode
[2023-04-01 10:07:31,033 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:07:31,035 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:07:31,035 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:07:31,035 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:07:31,042 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:31" (1/1) ...
[2023-04-01 10:07:31,043 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:31" (1/1) ...
[2023-04-01 10:07:31,088 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:31" (1/1) ...
[2023-04-01 10:07:31,088 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:31" (1/1) ...
[2023-04-01 10:07:31,298 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:31" (1/1) ...
[2023-04-01 10:07:31,320 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:31" (1/1) ...
[2023-04-01 10:07:31,334 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:31" (1/1) ...
[2023-04-01 10:07:31,344 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:31" (1/1) ...
[2023-04-01 10:07:31,416 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:07:31,417 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:07:31,417 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:07:31,417 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:07:31,418 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:31" (1/1) ...
[2023-04-01 10:07:31,423 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:07:31,430 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:07:31,441 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 10:07:31,459 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 10:07:31,475 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:07:31,475 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:07:31,475 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:07:31,476 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:07:31,476 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:07:31,476 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 10:07:31,476 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2023-04-01 10:07:31,476 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:07:31,476 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:07:31,476 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:07:31,476 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:07:31,477 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:07:31,545 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:07:31,547 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:07:35,603 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:07:38,182 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:07:38,183 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:07:38,186 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:07:38 BoogieIcfgContainer
[2023-04-01 10:07:38,186 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:07:38,190 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:07:38,190 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:07:38,192 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:07:38,193 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:07:29" (1/3) ...
[2023-04-01 10:07:38,193 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b9f24c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:07:38, skipping insertion in model container
[2023-04-01 10:07:38,193 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:31" (2/3) ...
[2023-04-01 10:07:38,193 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b9f24c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:07:38, skipping insertion in model container
[2023-04-01 10:07:38,193 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:07:38" (3/3) ...
[2023-04-01 10:07:38,194 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem13_label13.c
[2023-04-01 10:07:38,208 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:07:38,208 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:07:38,262 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:07:38,266 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;@21514d4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:07:38,266 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:07:38,271 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-04-01 10:07:38,276 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:07:38,276 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:07:38,276 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:07:38,277 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:07:38,280 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:07:38,280 INFO  L85        PathProgramCache]: Analyzing trace with hash -134413547, now seen corresponding path program 1 times
[2023-04-01 10:07:38,287 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:07:38,287 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720420459]
[2023-04-01 10:07:38,288 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:07:38,288 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:07:38,376 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:07:38,581 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 10:07:38,583 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:07:38,583 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720420459]
[2023-04-01 10:07:38,584 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720420459] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:07:38,584 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:07:38,584 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:07:38,585 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952236154]
[2023-04-01 10:07:38,585 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:07:38,588 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:07:38,588 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:07:38,604 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:07:38,604 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:07:38,607 INFO  L87              Difference]: Start difference. First operand  has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 10:07:42,127 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:07:42,128 INFO  L93              Difference]: Finished difference Result 2068 states and 4065 transitions.
[2023-04-01 10:07:42,129 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:07:42,130 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 10:07:42,130 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:07:42,146 INFO  L225             Difference]: With dead ends: 2068
[2023-04-01 10:07:42,146 INFO  L226             Difference]: Without dead ends: 1371
[2023-04-01 10:07:42,151 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 10:07:42,153 INFO  L413           NwaCegarLoop]: 102 mSDtfsCounter, 768 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 1051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 3067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1051 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time
[2023-04-01 10:07:42,154 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 127 Invalid, 3067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1051 Valid, 2016 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time]
[2023-04-01 10:07:42,166 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1371 states.
[2023-04-01 10:07:42,215 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368.
[2023-04-01 10:07:42,217 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1368 states, 1350 states have (on average 1.9103703703703703) internal successors, (2579), 1350 states have internal predecessors, (2579), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14)
[2023-04-01 10:07:42,222 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2602 transitions.
[2023-04-01 10:07:42,223 INFO  L78                 Accepts]: Start accepts. Automaton has 1368 states and 2602 transitions. Word has length 11
[2023-04-01 10:07:42,223 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:07:42,223 INFO  L495      AbstractCegarLoop]: Abstraction has 1368 states and 2602 transitions.
[2023-04-01 10:07:42,223 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 10:07:42,224 INFO  L276                IsEmpty]: Start isEmpty. Operand 1368 states and 2602 transitions.
[2023-04-01 10:07:42,225 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2023-04-01 10:07:42,225 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:07:42,225 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]
[2023-04-01 10:07:42,225 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:07:42,225 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:07:42,226 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:07:42,226 INFO  L85        PathProgramCache]: Analyzing trace with hash -1625755678, now seen corresponding path program 1 times
[2023-04-01 10:07:42,226 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:07:42,226 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507969906]
[2023-04-01 10:07:42,226 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:07:42,226 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:07:42,243 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:07:42,346 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 10:07:42,347 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:07:42,347 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507969906]
[2023-04-01 10:07:42,347 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507969906] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:07:42,347 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:07:42,347 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:07:42,347 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918921422]
[2023-04-01 10:07:42,347 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:07:42,348 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:07:42,348 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:07:42,349 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:07:42,349 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:07:42,349 INFO  L87              Difference]: Start difference. First operand 1368 states and 2602 transitions. Second operand  has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 10:07:46,838 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:07:46,838 INFO  L93              Difference]: Finished difference Result 4167 states and 7945 transitions.
[2023-04-01 10:07:46,838 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-04-01 10:07:46,839 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 32
[2023-04-01 10:07:46,839 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:07:46,850 INFO  L225             Difference]: With dead ends: 4167
[2023-04-01 10:07:46,850 INFO  L226             Difference]: Without dead ends: 2804
[2023-04-01 10:07:46,854 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 10:07:46,855 INFO  L413           NwaCegarLoop]: 44 mSDtfsCounter, 2433 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3741 mSolverCounterSat, 1163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2433 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 4904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 3741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time
[2023-04-01 10:07:46,855 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2433 Valid, 111 Invalid, 4904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1163 Valid, 3741 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time]
[2023-04-01 10:07:46,858 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2804 states.
[2023-04-01 10:07:46,930 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2737.
[2023-04-01 10:07:46,933 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2737 states, 2695 states have (on average 1.6059369202226346) internal successors, (4328), 2699 states have internal predecessors, (4328), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74)
[2023-04-01 10:07:46,942 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 4417 transitions.
[2023-04-01 10:07:46,942 INFO  L78                 Accepts]: Start accepts. Automaton has 2737 states and 4417 transitions. Word has length 32
[2023-04-01 10:07:46,943 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:07:46,943 INFO  L495      AbstractCegarLoop]: Abstraction has 2737 states and 4417 transitions.
[2023-04-01 10:07:46,944 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 10:07:46,944 INFO  L276                IsEmpty]: Start isEmpty. Operand 2737 states and 4417 transitions.
[2023-04-01 10:07:46,946 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2023-04-01 10:07:46,946 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:07:46,946 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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]
[2023-04-01 10:07:46,946 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:07:46,946 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:07:46,948 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:07:46,948 INFO  L85        PathProgramCache]: Analyzing trace with hash -2114251825, now seen corresponding path program 1 times
[2023-04-01 10:07:46,948 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:07:46,949 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432166031]
[2023-04-01 10:07:46,949 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:07:46,949 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:07:46,984 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:07:47,293 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-04-01 10:07:47,293 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:07:47,293 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432166031]
[2023-04-01 10:07:47,293 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432166031] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:07:47,294 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546095773]
[2023-04-01 10:07:47,295 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:07:47,295 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:07:47,295 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:07:47,297 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 10:07:47,337 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 10:07:47,431 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:07:47,433 INFO  L262         TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-04-01 10:07:47,438 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:07:47,498 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 10:07:47,498 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-01 10:07:47,499 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [546095773] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:07:47,499 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-01 10:07:47,499 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6
[2023-04-01 10:07:47,499 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315730875]
[2023-04-01 10:07:47,499 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:07:47,500 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:07:47,500 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:07:47,500 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:07:47,500 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2023-04-01 10:07:47,500 INFO  L87              Difference]: Start difference. First operand 2737 states and 4417 transitions. Second operand  has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:07:52,101 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:07:52,101 INFO  L93              Difference]: Finished difference Result 8371 states and 13811 transitions.
[2023-04-01 10:07:52,117 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:07:52,117 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44
[2023-04-01 10:07:52,117 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:07:52,135 INFO  L225             Difference]: With dead ends: 8371
[2023-04-01 10:07:52,136 INFO  L226             Difference]: Without dead ends: 5639
[2023-04-01 10:07:52,140 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2023-04-01 10:07:52,141 INFO  L413           NwaCegarLoop]: 39 mSDtfsCounter, 2190 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4395 mSolverCounterSat, 1277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2190 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1277 IncrementalHoareTripleChecker+Valid, 4395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time
[2023-04-01 10:07:52,142 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2190 Valid, 96 Invalid, 5672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1277 Valid, 4395 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time]
[2023-04-01 10:07:52,146 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5639 states.
[2023-04-01 10:07:52,229 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 5521.
[2023-04-01 10:07:52,236 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5521 states, 5405 states have (on average 1.4277520814061055) internal successors, (7717), 5427 states have internal predecessors, (7717), 27 states have call successors, (27), 27 states have call predecessors, (27), 88 states have return successors, (382), 66 states have call predecessors, (382), 26 states have call successors, (382)
[2023-04-01 10:07:52,250 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5521 states to 5521 states and 8126 transitions.
[2023-04-01 10:07:52,251 INFO  L78                 Accepts]: Start accepts. Automaton has 5521 states and 8126 transitions. Word has length 44
[2023-04-01 10:07:52,252 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:07:52,252 INFO  L495      AbstractCegarLoop]: Abstraction has 5521 states and 8126 transitions.
[2023-04-01 10:07:52,253 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:07:52,254 INFO  L276                IsEmpty]: Start isEmpty. Operand 5521 states and 8126 transitions.
[2023-04-01 10:07:52,261 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2023-04-01 10:07:52,262 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:07:52,262 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:07:52,279 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-04-01 10:07:52,467 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:07:52,468 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:07:52,468 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:07:52,468 INFO  L85        PathProgramCache]: Analyzing trace with hash 521750632, now seen corresponding path program 1 times
[2023-04-01 10:07:52,469 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:07:52,469 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397579554]
[2023-04-01 10:07:52,469 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:07:52,469 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:07:52,490 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:07:52,690 INFO  L134       CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked.
[2023-04-01 10:07:52,691 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:07:52,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397579554]
[2023-04-01 10:07:52,691 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397579554] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:07:52,692 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544396392]
[2023-04-01 10:07:52,692 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:07:52,692 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:07:52,692 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:07:52,695 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 10:07:52,700 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-04-01 10:07:52,798 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:07:52,800 INFO  L262         TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-04-01 10:07:52,803 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:07:52,866 INFO  L134       CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2023-04-01 10:07:52,866 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-01 10:07:52,866 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544396392] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:07:52,866 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-01 10:07:52,866 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-04-01 10:07:52,868 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80331313]
[2023-04-01 10:07:52,868 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:07:52,868 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:07:52,868 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:07:52,869 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:07:52,869 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-04-01 10:07:52,869 INFO  L87              Difference]: Start difference. First operand 5521 states and 8126 transitions. Second operand  has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:07:57,128 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:07:57,128 INFO  L93              Difference]: Finished difference Result 14103 states and 21166 transitions.
[2023-04-01 10:07:57,128 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-04-01 10:07:57,128 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62
[2023-04-01 10:07:57,129 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:07:57,150 INFO  L225             Difference]: With dead ends: 14103
[2023-04-01 10:07:57,150 INFO  L226             Difference]: Without dead ends: 8587
[2023-04-01 10:07:57,158 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72
[2023-04-01 10:07:57,159 INFO  L413           NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 970 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time
[2023-04-01 10:07:57,159 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [970 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time]
[2023-04-01 10:07:57,164 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8587 states.
[2023-04-01 10:07:57,345 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8587 to 8395.
[2023-04-01 10:07:57,355 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8395 states, 8168 states have (on average 1.3194172380019589) internal successors, (10777), 8223 states have internal predecessors, (10777), 39 states have call successors, (39), 39 states have call predecessors, (39), 187 states have return successors, (949), 132 states have call predecessors, (949), 38 states have call successors, (949)
[2023-04-01 10:07:57,366 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8395 states to 8395 states and 11765 transitions.
[2023-04-01 10:07:57,366 INFO  L78                 Accepts]: Start accepts. Automaton has 8395 states and 11765 transitions. Word has length 62
[2023-04-01 10:07:57,366 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:07:57,366 INFO  L495      AbstractCegarLoop]: Abstraction has 8395 states and 11765 transitions.
[2023-04-01 10:07:57,367 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:07:57,367 INFO  L276                IsEmpty]: Start isEmpty. Operand 8395 states and 11765 transitions.
[2023-04-01 10:07:57,368 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 97
[2023-04-01 10:07:57,368 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:07:57,369 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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]
[2023-04-01 10:07:57,389 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-04-01 10:07:57,589 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3
[2023-04-01 10:07:57,594 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:07:57,594 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:07:57,594 INFO  L85        PathProgramCache]: Analyzing trace with hash -725122655, now seen corresponding path program 1 times
[2023-04-01 10:07:57,595 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:07:57,595 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245407319]
[2023-04-01 10:07:57,595 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:07:57,595 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:07:57,655 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:07:57,813 INFO  L134       CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked.
[2023-04-01 10:07:57,813 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:07:57,814 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245407319]
[2023-04-01 10:07:57,815 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245407319] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:07:57,815 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234176874]
[2023-04-01 10:07:57,815 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:07:57,815 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:07:57,815 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:07:57,816 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 10:07:57,818 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-04-01 10:07:57,929 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:07:57,932 INFO  L262         TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:07:57,938 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:07:57,984 INFO  L134       CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked.
[2023-04-01 10:07:57,984 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:07:58,062 INFO  L134       CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked.
[2023-04-01 10:07:58,062 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [234176874] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:07:58,062 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2078962847]
[2023-04-01 10:07:58,092 INFO  L159        IcfgInterpreter]: Started Sifa with 41 locations of interest
[2023-04-01 10:07:58,093 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:07:58,095 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:07:58,098 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:07:58,098 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:07:58,300 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 81 for LOIs
[2023-04-01 10:07:58,625 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 51
[2023-04-01 10:07:58,831 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 8075 conjuctions. This might take some time...
[2023-04-01 10:07:58,913 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 39 conjuctions. 
[2023-04-01 10:08:01,719 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 10
[2023-04-01 10:08:02,101 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 99511 conjuctions. This might take some time...