/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/Problem16_label50.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:23:01,419 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2023-04-01 10:23:01,464 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2023-04-01 10:23:01,474 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 10:23:01,508 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 10:23:01,509 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:23:01,510 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 10:23:01,537 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:23:01,537 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:23:01,538 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:23:01,538 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:23:01,539 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:23:01,539 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:23:01,539 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:23:01,539 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:23:01,539 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:23:01,540 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:23:01,540 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:23:01,541 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:23:01,541 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:23:01,541 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:23:01,541 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:23:01,541 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:23:01,541 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:23:01,542 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:23:01,542 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:23:01,543 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:23:01,543 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:23:01,543 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:23:01,543 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:23:01,543 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:23:01,543 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:23:01,543 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:23:01,544 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:23:01,544 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:23:01,544 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:23:01,544 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:23:01,545 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:23:01,545 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:23:01,545 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:23:01,545 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:23:01,545 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:23:01,545 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:23:01,546 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:23:01,546 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:23:01,546 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:23:01,546 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:23:01,546 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:23:01,546 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:23:01,769 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:23:01,786 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:23:01,788 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:23:01,789 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:23:01,790 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:23:01,791 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label50.c
[2023-04-01 10:23:03,017 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:23:03,383 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:23:03,384 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label50.c
[2023-04-01 10:23:03,400 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/182f42f75/a06738693b0c472384ae605fa8007fdc/FLAG069674721
[2023-04-01 10:23:03,414 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/182f42f75/a06738693b0c472384ae605fa8007fdc
[2023-04-01 10:23:03,417 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:23:03,418 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:23:03,420 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:23:03,420 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:23:03,426 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:23:03,427 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:23:03" (1/1) ...
[2023-04-01 10:23:03,428 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d94a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:03, skipping insertion in model container
[2023-04-01 10:23:03,428 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:23:03" (1/1) ...
[2023-04-01 10:23:03,434 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:23:03,494 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:23:03,711 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/Problem16_label50.c[4800,4813]
[2023-04-01 10:23:04,008 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:23:04,030 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:23:04,046 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/Problem16_label50.c[4800,4813]
[2023-04-01 10:23:04,202 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:23:04,217 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:23:04,218 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:04 WrapperNode
[2023-04-01 10:23:04,218 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:23:04,219 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:23:04,219 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:23:04,220 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:23:04,230 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:04" (1/1) ...
[2023-04-01 10:23:04,230 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:04" (1/1) ...
[2023-04-01 10:23:04,272 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:04" (1/1) ...
[2023-04-01 10:23:04,273 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:04" (1/1) ...
[2023-04-01 10:23:04,333 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:04" (1/1) ...
[2023-04-01 10:23:04,352 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:04" (1/1) ...
[2023-04-01 10:23:04,370 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:04" (1/1) ...
[2023-04-01 10:23:04,379 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:04" (1/1) ...
[2023-04-01 10:23:04,392 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:23:04,394 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:23:04,394 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:23:04,394 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:23:04,395 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:04" (1/1) ...
[2023-04-01 10:23:04,401 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:23:04,411 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:23:04,426 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 10:23:04,451 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 10:23:04,466 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:23:04,466 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:23:04,466 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:23:04,466 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:23:04,466 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:23:04,466 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:23:04,467 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:23:04,467 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:23:04,467 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:23:04,467 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:23:04,467 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:23:04,467 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:23:04,467 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:23:04,467 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:23:04,467 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:23:04,467 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:23:04,468 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:23:04,468 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:23:04,468 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:23:04,468 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:23:04,468 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:23:04,548 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:23:04,550 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:23:06,314 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:23:07,465 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:23:07,465 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:23:07,469 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:23:07 BoogieIcfgContainer
[2023-04-01 10:23:07,469 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:23:07,472 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:23:07,472 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:23:07,475 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:23:07,475 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:23:03" (1/3) ...
[2023-04-01 10:23:07,475 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc5da35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:23:07, skipping insertion in model container
[2023-04-01 10:23:07,476 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:23:04" (2/3) ...
[2023-04-01 10:23:07,476 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc5da35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:23:07, skipping insertion in model container
[2023-04-01 10:23:07,476 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:23:07" (3/3) ...
[2023-04-01 10:23:07,477 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem16_label50.c
[2023-04-01 10:23:07,492 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:23:07,493 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:23:07,551 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:23:07,559 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;@3420ae49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:23:07,559 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:23:07,566 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-04-01 10:23:07,571 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:23:07,572 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:23:07,572 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:23:07,573 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:23:07,578 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:23:07,579 INFO  L85        PathProgramCache]: Analyzing trace with hash -706733466, now seen corresponding path program 1 times
[2023-04-01 10:23:07,588 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:23:07,588 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111927216]
[2023-04-01 10:23:07,589 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:23:07,589 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:23:07,684 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:23:07,891 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 10:23:07,892 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:23:07,892 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111927216]
[2023-04-01 10:23:07,892 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111927216] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:23:07,893 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:23:07,893 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:23:07,894 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801521265]
[2023-04-01 10:23:07,895 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:23:07,898 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:23:07,898 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:23:07,923 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:23:07,924 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:23:07,926 INFO  L87              Difference]: Start difference. First operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 10:23:09,162 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:23:09,162 INFO  L93              Difference]: Finished difference Result 718 states and 1389 transitions.
[2023-04-01 10:23:09,163 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:23:09,164 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 10:23:09,165 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:23:09,177 INFO  L225             Difference]: With dead ends: 718
[2023-04-01 10:23:09,177 INFO  L226             Difference]: Without dead ends: 471
[2023-04-01 10:23:09,182 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 10:23:09,185 INFO  L413           NwaCegarLoop]: 39 mSDtfsCounter, 307 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-04-01 10:23:09,186 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 54 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-04-01 10:23:09,200 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 471 states.
[2023-04-01 10:23:09,238 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462.
[2023-04-01 10:23:09,240 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 462 states, 452 states have (on average 1.915929203539823) internal successors, (866), 452 states have internal predecessors, (866), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2023-04-01 10:23:09,242 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 877 transitions.
[2023-04-01 10:23:09,243 INFO  L78                 Accepts]: Start accepts. Automaton has 462 states and 877 transitions. Word has length 11
[2023-04-01 10:23:09,244 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:23:09,244 INFO  L495      AbstractCegarLoop]: Abstraction has 462 states and 877 transitions.
[2023-04-01 10:23:09,244 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 10:23:09,244 INFO  L276                IsEmpty]: Start isEmpty. Operand 462 states and 877 transitions.
[2023-04-01 10:23:09,246 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2023-04-01 10:23:09,246 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:23:09,246 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:23:09,246 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:23:09,247 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:23:09,247 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:23:09,247 INFO  L85        PathProgramCache]: Analyzing trace with hash -1700650660, now seen corresponding path program 1 times
[2023-04-01 10:23:09,248 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:23:09,248 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35604233]
[2023-04-01 10:23:09,248 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:23:09,248 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:23:09,305 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:23:09,526 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 10:23:09,526 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:23:09,527 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35604233]
[2023-04-01 10:23:09,527 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35604233] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:23:09,527 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:23:09,527 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:23:09,527 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144794163]
[2023-04-01 10:23:09,527 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:23:09,528 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:23:09,529 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:23:09,529 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:23:09,530 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:23:09,530 INFO  L87              Difference]: Start difference. First operand 462 states and 877 transitions. Second operand  has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 10:23:10,916 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:23:10,917 INFO  L93              Difference]: Finished difference Result 1390 states and 2669 transitions.
[2023-04-01 10:23:10,917 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:23:10,918 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 44
[2023-04-01 10:23:10,918 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:23:10,927 INFO  L225             Difference]: With dead ends: 1390
[2023-04-01 10:23:10,927 INFO  L226             Difference]: Without dead ends: 933
[2023-04-01 10:23:10,928 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 10:23:10,929 INFO  L413           NwaCegarLoop]: 17 mSDtfsCounter, 853 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2023-04-01 10:23:10,930 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 43 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2023-04-01 10:23:10,931 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 933 states.
[2023-04-01 10:23:10,975 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 917.
[2023-04-01 10:23:10,976 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 917 states, 900 states have (on average 1.8311111111111111) internal successors, (1648), 903 states have internal predecessors, (1648), 7 states have call successors, (7), 7 states have call predecessors, (7), 9 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23)
[2023-04-01 10:23:10,980 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1678 transitions.
[2023-04-01 10:23:10,981 INFO  L78                 Accepts]: Start accepts. Automaton has 917 states and 1678 transitions. Word has length 44
[2023-04-01 10:23:10,981 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:23:10,981 INFO  L495      AbstractCegarLoop]: Abstraction has 917 states and 1678 transitions.
[2023-04-01 10:23:10,981 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 10:23:10,982 INFO  L276                IsEmpty]: Start isEmpty. Operand 917 states and 1678 transitions.
[2023-04-01 10:23:10,984 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 96
[2023-04-01 10:23:10,984 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:23:10,985 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:23:10,985 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:23:10,985 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:23:10,985 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:23:10,985 INFO  L85        PathProgramCache]: Analyzing trace with hash 5457130, now seen corresponding path program 1 times
[2023-04-01 10:23:10,986 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:23:10,986 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978238263]
[2023-04-01 10:23:10,986 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:23:10,986 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:23:11,014 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:23:11,336 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-04-01 10:23:11,337 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:23:11,337 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978238263]
[2023-04-01 10:23:11,337 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978238263] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:23:11,338 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666854197]
[2023-04-01 10:23:11,339 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:23:11,339 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:23:11,339 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:23:11,345 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 10:23:11,352 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 10:23:11,456 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:23:11,460 INFO  L262         TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-04-01 10:23:11,466 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:23:11,658 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 10:23:11,659 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-01 10:23:11,659 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [666854197] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:23:11,659 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-01 10:23:11,659 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-04-01 10:23:11,660 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312291855]
[2023-04-01 10:23:11,660 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:23:11,660 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:23:11,660 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:23:11,661 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:23:11,661 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-04-01 10:23:11,661 INFO  L87              Difference]: Start difference. First operand 917 states and 1678 transitions. Second operand  has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 10:23:13,203 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:23:13,204 INFO  L93              Difference]: Finished difference Result 2749 states and 5075 transitions.
[2023-04-01 10:23:13,205 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-04-01 10:23:13,205 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 95
[2023-04-01 10:23:13,206 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:23:13,219 INFO  L225             Difference]: With dead ends: 2749
[2023-04-01 10:23:13,219 INFO  L226             Difference]: Without dead ends: 1837
[2023-04-01 10:23:13,222 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2023-04-01 10:23:13,226 INFO  L413           NwaCegarLoop]: 14 mSDtfsCounter, 887 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time
[2023-04-01 10:23:13,231 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 37 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time]
[2023-04-01 10:23:13,235 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1837 states.
[2023-04-01 10:23:13,282 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1168.
[2023-04-01 10:23:13,284 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1168 states, 1140 states have (on average 1.7456140350877194) internal successors, (1990), 1148 states have internal predecessors, (1990), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48)
[2023-04-01 10:23:13,289 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2048 transitions.
[2023-04-01 10:23:13,290 INFO  L78                 Accepts]: Start accepts. Automaton has 1168 states and 2048 transitions. Word has length 95
[2023-04-01 10:23:13,290 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:23:13,291 INFO  L495      AbstractCegarLoop]: Abstraction has 1168 states and 2048 transitions.
[2023-04-01 10:23:13,291 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 10:23:13,291 INFO  L276                IsEmpty]: Start isEmpty. Operand 1168 states and 2048 transitions.
[2023-04-01 10:23:13,302 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 152
[2023-04-01 10:23:13,303 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:23:13,304 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:23:13,314 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-04-01 10:23:13,509 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 10:23:13,510 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:23:13,511 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:23:13,511 INFO  L85        PathProgramCache]: Analyzing trace with hash 602676823, now seen corresponding path program 1 times
[2023-04-01 10:23:13,511 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:23:13,511 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967441082]
[2023-04-01 10:23:13,511 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:23:13,512 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:23:13,561 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:23:13,876 INFO  L134       CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 76 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked.
[2023-04-01 10:23:13,876 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:23:13,876 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967441082]
[2023-04-01 10:23:13,876 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967441082] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:23:13,878 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356878128]
[2023-04-01 10:23:13,878 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:23:13,878 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:23:13,878 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:23:13,880 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 10:23:13,906 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 10:23:14,015 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:23:14,017 INFO  L262         TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-04-01 10:23:14,027 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:23:14,154 INFO  L134       CoverageAnalysis]: Checked inductivity of 132 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked.
[2023-04-01 10:23:14,155 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-01 10:23:14,155 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356878128] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:23:14,155 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-01 10:23:14,155 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-04-01 10:23:14,155 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088974792]
[2023-04-01 10:23:14,155 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:23:14,156 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:23:14,156 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:23:14,156 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:23:14,156 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-04-01 10:23:14,156 INFO  L87              Difference]: Start difference. First operand 1168 states and 2048 transitions. Second operand  has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 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 10:23:15,541 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:23:15,541 INFO  L93              Difference]: Finished difference Result 2591 states and 4491 transitions.
[2023-04-01 10:23:15,543 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:23:15,544 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 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 151
[2023-04-01 10:23:15,545 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:23:15,553 INFO  L225             Difference]: With dead ends: 2591
[2023-04-01 10:23:15,553 INFO  L226             Difference]: Without dead ends: 1428
[2023-04-01 10:23:15,556 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2023-04-01 10:23:15,559 INFO  L413           NwaCegarLoop]: 17 mSDtfsCounter, 799 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2023-04-01 10:23:15,561 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 46 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2023-04-01 10:23:15,564 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1428 states.
[2023-04-01 10:23:15,598 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1410.
[2023-04-01 10:23:15,601 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1410 states, 1374 states have (on average 1.5254730713245996) internal successors, (2096), 1386 states have internal predecessors, (2096), 12 states have call successors, (12), 12 states have call predecessors, (12), 23 states have return successors, (68), 11 states have call predecessors, (68), 11 states have call successors, (68)
[2023-04-01 10:23:15,607 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2176 transitions.
[2023-04-01 10:23:15,607 INFO  L78                 Accepts]: Start accepts. Automaton has 1410 states and 2176 transitions. Word has length 151
[2023-04-01 10:23:15,608 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:23:15,608 INFO  L495      AbstractCegarLoop]: Abstraction has 1410 states and 2176 transitions.
[2023-04-01 10:23:15,608 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 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 10:23:15,608 INFO  L276                IsEmpty]: Start isEmpty. Operand 1410 states and 2176 transitions.
[2023-04-01 10:23:15,613 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 222
[2023-04-01 10:23:15,613 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:23:15,613 INFO  L195           NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:23:15,623 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-04-01 10:23:15,819 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 10:23:15,819 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:23:15,820 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:23:15,820 INFO  L85        PathProgramCache]: Analyzing trace with hash -151036920, now seen corresponding path program 1 times
[2023-04-01 10:23:15,820 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:23:15,820 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584837133]
[2023-04-01 10:23:15,821 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:23:15,821 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:23:15,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:23:16,200 INFO  L134       CoverageAnalysis]: Checked inductivity of 277 backedges. 82 proven. 82 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked.
[2023-04-01 10:23:16,201 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:23:16,201 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584837133]
[2023-04-01 10:23:16,202 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584837133] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:23:16,202 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209608774]
[2023-04-01 10:23:16,203 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:23:16,203 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:23:16,203 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:23:16,204 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 10:23:16,223 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 10:23:16,411 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:23:16,415 INFO  L262         TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:23:16,419 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:23:16,521 INFO  L134       CoverageAnalysis]: Checked inductivity of 277 backedges. 230 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked.
[2023-04-01 10:23:16,522 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:23:16,767 INFO  L134       CoverageAnalysis]: Checked inductivity of 277 backedges. 82 proven. 82 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked.
[2023-04-01 10:23:16,767 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [209608774] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:23:16,767 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630766090]
[2023-04-01 10:23:16,818 INFO  L159        IcfgInterpreter]: Started Sifa with 77 locations of interest
[2023-04-01 10:23:16,819 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:23:16,822 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:23:16,830 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:23:16,831 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:23:17,120 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs
[2023-04-01 10:23:17,384 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 39
[2023-04-01 10:23:21,447 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 22
[2023-04-01 10:23:26,499 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 267345 conjuctions. This might take some time...