/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/Problem15_label49.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:18:31,622 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2023-04-01 10:18:31,670 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2023-04-01 10:18:31,712 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 10:18:31,713 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:18:31,713 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 10:18:31,741 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:18:31,741 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:18:31,742 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:18:31,742 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:18:31,743 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:18:31,743 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:18:31,743 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:18:31,743 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:18:31,743 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:18:31,743 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:18:31,743 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:18:31,744 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:18:31,744 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:18:31,744 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:18:31,744 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:18:31,744 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:18:31,744 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:18:31,744 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:18:31,744 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:18:31,745 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:18:31,745 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:18:31,745 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:18:31,745 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:18:31,745 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:18:31,745 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:18:31,745 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:18:31,745 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:18:31,745 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:18:31,745 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:18:31,746 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:18:31,746 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:18:31,746 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:18:31,746 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:18:31,746 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:18:31,746 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:18:31,746 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:18:31,746 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:18:31,746 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:18:31,747 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:18:31,747 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:18:31,747 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:18:31,747 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:18:31,909 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:18:31,925 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:18:31,927 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:18:31,927 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:18:31,928 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:18:31,929 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label49.c
[2023-04-01 10:18:33,016 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:18:33,229 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:18:33,230 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label49.c
[2023-04-01 10:18:33,244 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0055b3b6/42aa4b9b9cff43959b314a7f6189a84e/FLAG87939b294
[2023-04-01 10:18:33,256 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0055b3b6/42aa4b9b9cff43959b314a7f6189a84e
[2023-04-01 10:18:33,258 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:18:33,259 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:18:33,261 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:18:33,262 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:18:33,264 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:18:33,265 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:18:33" (1/1) ...
[2023-04-01 10:18:33,266 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21dd83b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33, skipping insertion in model container
[2023-04-01 10:18:33,266 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:18:33" (1/1) ...
[2023-04-01 10:18:33,270 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:18:33,327 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:18:33,458 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/Problem15_label49.c[6430,6443]
[2023-04-01 10:18:33,773 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:18:33,783 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:18:33,809 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/Problem15_label49.c[6430,6443]
[2023-04-01 10:18:33,938 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:18:33,951 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:18:33,951 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33 WrapperNode
[2023-04-01 10:18:33,951 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:18:33,952 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:18:33,952 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:18:33,952 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:18:33,966 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33" (1/1) ...
[2023-04-01 10:18:33,966 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33" (1/1) ...
[2023-04-01 10:18:33,995 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33" (1/1) ...
[2023-04-01 10:18:33,995 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33" (1/1) ...
[2023-04-01 10:18:34,050 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33" (1/1) ...
[2023-04-01 10:18:34,067 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33" (1/1) ...
[2023-04-01 10:18:34,087 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33" (1/1) ...
[2023-04-01 10:18:34,094 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33" (1/1) ...
[2023-04-01 10:18:34,109 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:18:34,110 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:18:34,110 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:18:34,110 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:18:34,111 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33" (1/1) ...
[2023-04-01 10:18:34,117 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:18:34,124 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:18:34,135 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 10:18:34,166 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 10:18:34,180 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:18:34,180 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:18:34,180 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:18:34,180 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:18:34,180 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:18:34,180 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:18:34,180 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:18:34,180 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:18:34,181 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:18:34,181 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:18:34,181 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:18:34,181 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:18:34,181 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:18:34,181 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:18:34,181 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:18:34,181 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:18:34,181 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:18:34,181 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:18:34,182 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:18:34,182 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:18:34,182 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:18:34,253 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:18:34,255 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:18:36,237 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:18:36,816 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:18:36,817 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:18:36,819 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:18:36 BoogieIcfgContainer
[2023-04-01 10:18:36,819 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:18:36,820 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:18:36,821 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:18:36,823 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:18:36,823 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:18:33" (1/3) ...
[2023-04-01 10:18:36,823 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2144bc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:18:36, skipping insertion in model container
[2023-04-01 10:18:36,823 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:18:33" (2/3) ...
[2023-04-01 10:18:36,823 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2144bc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:18:36, skipping insertion in model container
[2023-04-01 10:18:36,823 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:18:36" (3/3) ...
[2023-04-01 10:18:36,824 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem15_label49.c
[2023-04-01 10:18:36,850 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:18:36,850 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:18:36,887 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:18:36,892 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;@6a34736e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:18:36,892 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:18:36,896 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 10:18:36,900 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:18:36,901 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:18:36,901 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:18:36,901 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:18:36,905 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:18:36,905 INFO  L85        PathProgramCache]: Analyzing trace with hash 271524358, now seen corresponding path program 1 times
[2023-04-01 10:18:36,911 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:18:36,911 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236176037]
[2023-04-01 10:18:36,911 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:18:36,912 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:18:37,003 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:18:37,187 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 10:18:37,187 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:18:37,187 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236176037]
[2023-04-01 10:18:37,188 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236176037] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:18:37,188 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:18:37,188 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:18:37,189 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629087930]
[2023-04-01 10:18:37,190 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:18:37,193 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:18:37,194 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:18:37,215 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:18:37,216 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:18:37,218 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 10:18:38,634 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:18:38,634 INFO  L93              Difference]: Finished difference Result 718 states and 1389 transitions.
[2023-04-01 10:18:38,635 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:18:38,636 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 10:18:38,636 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:18:38,654 INFO  L225             Difference]: With dead ends: 718
[2023-04-01 10:18:38,654 INFO  L226             Difference]: Without dead ends: 471
[2023-04-01 10:18:38,678 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 10:18:38,682 INFO  L413           NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2023-04-01 10:18:38,683 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2023-04-01 10:18:38,704 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 471 states.
[2023-04-01 10:18:38,756 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469.
[2023-04-01 10:18:38,758 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 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 10:18:38,761 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions.
[2023-04-01 10:18:38,762 INFO  L78                 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11
[2023-04-01 10:18:38,762 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:18:38,762 INFO  L495      AbstractCegarLoop]: Abstraction has 469 states and 744 transitions.
[2023-04-01 10:18:38,762 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 10:18:38,763 INFO  L276                IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions.
[2023-04-01 10:18:38,763 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2023-04-01 10:18:38,764 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:18:38,764 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:18:38,764 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:18:38,764 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:18:38,765 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:18:38,765 INFO  L85        PathProgramCache]: Analyzing trace with hash -1392963249, now seen corresponding path program 1 times
[2023-04-01 10:18:38,765 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:18:38,765 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992617184]
[2023-04-01 10:18:38,765 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:18:38,765 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:18:38,790 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:18:38,891 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 10:18:38,892 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:18:38,892 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992617184]
[2023-04-01 10:18:38,892 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992617184] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:18:38,892 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:18:38,892 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:18:38,892 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905439017]
[2023-04-01 10:18:38,892 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:18:38,894 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:18:38,894 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:18:38,894 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:18:38,894 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:18:38,894 INFO  L87              Difference]: Start difference. First operand 469 states and 744 transitions. Second operand  has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-01 10:18:40,033 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:18:40,033 INFO  L93              Difference]: Finished difference Result 1395 states and 2229 transitions.
[2023-04-01 10:18:40,035 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:18:40,035 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21
[2023-04-01 10:18:40,035 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:18:40,039 INFO  L225             Difference]: With dead ends: 1395
[2023-04-01 10:18:40,039 INFO  L226             Difference]: Without dead ends: 931
[2023-04-01 10:18:40,040 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:18:40,041 INFO  L413           NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-04-01 10:18:40,042 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-04-01 10:18:40,043 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 931 states.
[2023-04-01 10:18:40,061 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929.
[2023-04-01 10:18:40,063 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 929 states, 913 states have (on average 1.3723986856516976) internal successors, (1253), 913 states have internal predecessors, (1253), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15)
[2023-04-01 10:18:40,066 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1276 transitions.
[2023-04-01 10:18:40,066 INFO  L78                 Accepts]: Start accepts. Automaton has 929 states and 1276 transitions. Word has length 21
[2023-04-01 10:18:40,066 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:18:40,066 INFO  L495      AbstractCegarLoop]: Abstraction has 929 states and 1276 transitions.
[2023-04-01 10:18:40,067 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-01 10:18:40,067 INFO  L276                IsEmpty]: Start isEmpty. Operand 929 states and 1276 transitions.
[2023-04-01 10:18:40,068 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2023-04-01 10:18:40,068 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:18:40,068 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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]
[2023-04-01 10:18:40,068 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:18:40,068 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:18:40,069 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:18:40,069 INFO  L85        PathProgramCache]: Analyzing trace with hash -1805315717, now seen corresponding path program 1 times
[2023-04-01 10:18:40,069 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:18:40,069 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619212214]
[2023-04-01 10:18:40,069 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:18:40,069 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:18:40,091 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:18:40,341 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2023-04-01 10:18:40,341 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:18:40,341 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619212214]
[2023-04-01 10:18:40,341 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619212214] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:18:40,342 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:18:40,343 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:18:40,343 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250067149]
[2023-04-01 10:18:40,343 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:18:40,344 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:18:40,344 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:18:40,345 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:18:40,345 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:18:40,345 INFO  L87              Difference]: Start difference. First operand 929 states and 1276 transitions. Second operand  has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2023-04-01 10:18:42,590 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:18:42,590 INFO  L93              Difference]: Finished difference Result 2350 states and 3356 transitions.
[2023-04-01 10:18:42,591 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-04-01 10:18:42,591 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67
[2023-04-01 10:18:42,591 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:18:42,596 INFO  L225             Difference]: With dead ends: 2350
[2023-04-01 10:18:42,596 INFO  L226             Difference]: Without dead ends: 1426
[2023-04-01 10:18:42,598 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-04-01 10:18:42,599 INFO  L413           NwaCegarLoop]: 15 mSDtfsCounter, 788 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time
[2023-04-01 10:18:42,599 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 44 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time]
[2023-04-01 10:18:42,600 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1426 states.
[2023-04-01 10:18:42,620 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1403.
[2023-04-01 10:18:42,622 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1403 states, 1374 states have (on average 1.294759825327511) internal successors, (1779), 1379 states have internal predecessors, (1779), 12 states have call successors, (12), 12 states have call predecessors, (12), 16 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33)
[2023-04-01 10:18:42,625 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1824 transitions.
[2023-04-01 10:18:42,625 INFO  L78                 Accepts]: Start accepts. Automaton has 1403 states and 1824 transitions. Word has length 67
[2023-04-01 10:18:42,626 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:18:42,626 INFO  L495      AbstractCegarLoop]: Abstraction has 1403 states and 1824 transitions.
[2023-04-01 10:18:42,626 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2023-04-01 10:18:42,626 INFO  L276                IsEmpty]: Start isEmpty. Operand 1403 states and 1824 transitions.
[2023-04-01 10:18:42,636 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 174
[2023-04-01 10:18:42,637 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:18:42,637 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:18:42,637 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 10:18:42,637 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:18:42,641 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:18:42,641 INFO  L85        PathProgramCache]: Analyzing trace with hash -1926527115, now seen corresponding path program 1 times
[2023-04-01 10:18:42,641 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:18:42,642 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431051519]
[2023-04-01 10:18:42,642 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:18:42,642 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:18:42,700 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:18:42,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-04-01 10:18:42,934 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:18:42,934 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431051519]
[2023-04-01 10:18:42,934 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431051519] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:18:42,935 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:18:42,935 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:18:42,935 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593803666]
[2023-04-01 10:18:42,935 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:18:42,935 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:18:42,935 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:18:42,936 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:18:42,936 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:18:42,936 INFO  L87              Difference]: Start difference. First operand 1403 states and 1824 transitions. Second operand  has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)
[2023-04-01 10:18:44,134 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:18:44,135 INFO  L93              Difference]: Finished difference Result 3496 states and 4706 transitions.
[2023-04-01 10:18:44,135 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:18:44,135 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173
[2023-04-01 10:18:44,136 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:18:44,141 INFO  L225             Difference]: With dead ends: 3496
[2023-04-01 10:18:44,141 INFO  L226             Difference]: Without dead ends: 2098
[2023-04-01 10:18:44,143 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:18:44,144 INFO  L413           NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-04-01 10:18:44,144 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-04-01 10:18:44,146 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2098 states.
[2023-04-01 10:18:44,178 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1868.
[2023-04-01 10:18:44,180 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1868 states, 1831 states have (on average 1.251228836701256) internal successors, (2291), 1840 states have internal predecessors, (2291), 14 states have call successors, (14), 14 states have call predecessors, (14), 22 states have return successors, (57), 13 states have call predecessors, (57), 13 states have call successors, (57)
[2023-04-01 10:18:44,183 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2362 transitions.
[2023-04-01 10:18:44,184 INFO  L78                 Accepts]: Start accepts. Automaton has 1868 states and 2362 transitions. Word has length 173
[2023-04-01 10:18:44,185 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:18:44,185 INFO  L495      AbstractCegarLoop]: Abstraction has 1868 states and 2362 transitions.
[2023-04-01 10:18:44,185 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)
[2023-04-01 10:18:44,185 INFO  L276                IsEmpty]: Start isEmpty. Operand 1868 states and 2362 transitions.
[2023-04-01 10:18:44,188 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 178
[2023-04-01 10:18:44,188 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:18:44,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:18:44,189 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 10:18:44,189 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:18:44,189 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:18:44,189 INFO  L85        PathProgramCache]: Analyzing trace with hash -875552499, now seen corresponding path program 1 times
[2023-04-01 10:18:44,189 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:18:44,189 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390844128]
[2023-04-01 10:18:44,190 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:18:44,190 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:18:44,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:18:44,416 INFO  L134       CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:18:44,416 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:18:44,416 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390844128]
[2023-04-01 10:18:44,416 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390844128] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:18:44,417 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454776485]
[2023-04-01 10:18:44,417 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:18:44,418 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:18:44,418 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:18:44,420 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 10:18:44,421 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 10:18:44,536 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:18:44,540 INFO  L262         TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:18:44,547 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:18:44,644 INFO  L134       CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:18:44,644 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:18:44,814 INFO  L134       CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:18:44,814 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454776485] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:18:44,814 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1423046729]
[2023-04-01 10:18:44,882 INFO  L159        IcfgInterpreter]: Started Sifa with 148 locations of interest
[2023-04-01 10:18:44,882 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:18:44,888 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:18:44,892 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:18:44,897 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:18:45,172 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs
[2023-04-01 10:18:45,525 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 46
[2023-04-01 10:18:45,904 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 7524 conjuctions. This might take some time...
[2023-04-01 10:18:46,012 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 86 conjuctions. 
[2023-04-01 10:18:49,865 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 15
[2023-04-01 10:18:57,709 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 735518 conjuctions. This might take some time...