/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/Problem14_label57.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:14:43,978 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 10:14:43,980 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 10:14:44,012 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 10:14:44,014 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 10:14:44,016 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 10:14:44,018 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-04-01 10:14:44,022 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 10:14:44,023 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 10:14:44,025 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-04-01 10:14:44,029 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 10:14:44,029 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 10:14:44,031 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 10:14:44,034 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
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[2023-04-01 10:14:44,037 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 10:14:44,037 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 10:14:44,044 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 10:14:44,049 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 10:14:44,050 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:14:44,051 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 10:14:44,074 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:14:44,074 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:14:44,074 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:14:44,075 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:14:44,075 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:14:44,075 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:14:44,075 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:14:44,076 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:14:44,076 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:14:44,076 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:14:44,076 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:14:44,076 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:14:44,076 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:14:44,077 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:14:44,077 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:14:44,077 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:14:44,077 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:14:44,077 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:14:44,077 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:14:44,077 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:14:44,077 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:14:44,077 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:14:44,078 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:14:44,078 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:14:44,078 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:14:44,078 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:14:44,078 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:14:44,078 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:14:44,078 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:14:44,078 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:14:44,078 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:14:44,078 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:14:44,079 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:14:44,079 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:14:44,079 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:14:44,079 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:14:44,079 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:14:44,079 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:14:44,079 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:14:44,079 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:14:44,079 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:14:44,079 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:14:44,253 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:14:44,268 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:14:44,270 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:14:44,271 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:14:44,271 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:14:44,272 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label57.c
[2023-04-01 10:14:45,348 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:14:45,515 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:14:45,516 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label57.c
[2023-04-01 10:14:45,523 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02347ddf9/2cb8f3fd48634b3d8749283fdf67c110/FLAG08bca2bef
[2023-04-01 10:14:45,544 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02347ddf9/2cb8f3fd48634b3d8749283fdf67c110
[2023-04-01 10:14:45,546 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:14:45,547 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:14:45,547 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:14:45,547 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:14:45,549 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:14:45,550 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:14:45" (1/1) ...
[2023-04-01 10:14:45,550 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771716ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45, skipping insertion in model container
[2023-04-01 10:14:45,551 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:14:45" (1/1) ...
[2023-04-01 10:14:45,555 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:14:45,587 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:14:45,721 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/Problem14_label57.c[3243,3256]
[2023-04-01 10:14:45,857 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:14:45,864 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:14:45,876 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/Problem14_label57.c[3243,3256]
[2023-04-01 10:14:45,946 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:14:45,962 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:14:45,963 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45 WrapperNode
[2023-04-01 10:14:45,963 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:14:45,963 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:14:45,963 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:14:45,963 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:14:45,971 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45" (1/1) ...
[2023-04-01 10:14:45,971 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45" (1/1) ...
[2023-04-01 10:14:45,990 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45" (1/1) ...
[2023-04-01 10:14:45,990 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45" (1/1) ...
[2023-04-01 10:14:46,046 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45" (1/1) ...
[2023-04-01 10:14:46,052 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45" (1/1) ...
[2023-04-01 10:14:46,073 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45" (1/1) ...
[2023-04-01 10:14:46,076 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45" (1/1) ...
[2023-04-01 10:14:46,082 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:14:46,082 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:14:46,082 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:14:46,082 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:14:46,083 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45" (1/1) ...
[2023-04-01 10:14:46,088 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:14:46,096 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:14:46,105 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 10:14:46,120 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 10:14:46,129 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:14:46,129 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:14:46,129 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:14:46,129 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:14:46,130 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:14:46,130 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:14:46,130 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:14:46,130 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:14:46,130 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:14:46,130 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:14:46,130 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:14:46,130 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:14:46,130 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:14:46,130 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:14:46,130 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:14:46,131 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:14:46,131 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:14:46,131 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:14:46,131 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:14:46,194 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:14:46,195 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:14:46,962 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:14:50,284 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:14:50,284 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:14:50,286 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:14:50 BoogieIcfgContainer
[2023-04-01 10:14:50,286 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:14:50,287 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:14:50,287 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:14:50,289 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:14:50,289 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:14:45" (1/3) ...
[2023-04-01 10:14:50,290 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2e124f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:14:50, skipping insertion in model container
[2023-04-01 10:14:50,290 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:14:45" (2/3) ...
[2023-04-01 10:14:50,290 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2e124f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:14:50, skipping insertion in model container
[2023-04-01 10:14:50,290 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:14:50" (3/3) ...
[2023-04-01 10:14:50,291 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem14_label57.c
[2023-04-01 10:14:50,302 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:14:50,303 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:14:50,329 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:14:50,333 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;@66a47fa5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:14:50,333 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:14:50,336 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:14:50,340 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:14:50,340 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:14:50,341 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:14:50,341 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:14:50,344 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:14:50,344 INFO  L85        PathProgramCache]: Analyzing trace with hash 948205531, now seen corresponding path program 1 times
[2023-04-01 10:14:50,350 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:14:50,350 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784913024]
[2023-04-01 10:14:50,351 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:14:50,351 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:14:50,417 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:14:50,563 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 10:14:50,564 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:14:50,564 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784913024]
[2023-04-01 10:14:50,565 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784913024] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:14:50,565 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:14:50,565 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:14:50,566 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015734444]
[2023-04-01 10:14:50,567 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:14:50,569 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:14:50,570 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:14:50,594 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:14:50,595 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:14:50,596 INFO  L87              Difference]: Start difference. First operand  has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand  has 3 states, 3 states have (on average 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 10:14:50,651 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:14:50,651 INFO  L93              Difference]: Finished difference Result 43 states and 52 transitions.
[2023-04-01 10:14:50,652 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:14:50,653 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 10:14:50,653 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:14:50,657 INFO  L225             Difference]: With dead ends: 43
[2023-04-01 10:14:50,657 INFO  L226             Difference]: Without dead ends: 21
[2023-04-01 10:14:50,659 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 10:14:50,661 INFO  L413           NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-04-01 10:14:50,661 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-04-01 10:14:50,671 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2023-04-01 10:14:50,679 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20.
[2023-04-01 10:14:50,680 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:14:50,680 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions.
[2023-04-01 10:14:50,681 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11
[2023-04-01 10:14:50,681 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:14:50,681 INFO  L495      AbstractCegarLoop]: Abstraction has 20 states and 21 transitions.
[2023-04-01 10:14:50,681 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 10:14:50,681 INFO  L276                IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions.
[2023-04-01 10:14:50,682 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2023-04-01 10:14:50,682 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:14:50,682 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:14:50,682 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:14:50,682 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:14:50,683 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:14:50,683 INFO  L85        PathProgramCache]: Analyzing trace with hash 668936506, now seen corresponding path program 1 times
[2023-04-01 10:14:50,683 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:14:50,683 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628369062]
[2023-04-01 10:14:50,683 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:14:50,683 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:14:50,804 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:15:08,114 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:15:08,115 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:15:08,115 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628369062]
[2023-04-01 10:15:08,115 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628369062] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:15:08,115 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021297171]
[2023-04-01 10:15:08,115 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:15:08,115 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:15:08,115 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:15:08,118 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 10:15:08,119 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 10:15:08,221 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:15:08,224 INFO  L262         TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 47 conjunts are in the unsatisfiable core
[2023-04-01 10:15:08,232 INFO  L285         TraceCheckSpWp]: Computing forward predicates...