/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label48.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:32:02,780 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2023-04-01 10:32:02,829 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2023-04-01 10:32:02,866 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 10:32:02,867 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:32:02,868 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 10:32:02,896 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:32:02,896 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:32:02,896 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:32:02,896 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:32:02,897 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:32:02,897 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:32:02,897 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:32:02,897 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:32:02,898 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:32:02,898 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:32:02,898 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:32:02,899 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:32:02,899 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:32:02,899 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:32:02,899 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:32:02,899 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:32:02,899 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:32:02,899 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:32:02,900 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:32:02,900 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:32:02,900 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:32:02,900 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:32:02,900 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:32:02,900 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:32:02,900 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:32:02,900 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:32:02,900 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:32:02,901 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:32:02,901 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:32:02,901 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:32:02,901 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:32:02,901 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:32:02,901 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:32:02,901 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:32:02,902 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:32:02,902 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:32:02,902 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:32:02,902 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:32:02,902 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:32:02,902 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:32:02,902 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:32:02,902 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:32:03,104 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:32:03,121 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:32:03,123 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:32:03,124 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:32:03,125 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:32:03,126 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label48.c
[2023-04-01 10:32:04,221 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:32:04,638 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:32:04,638 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label48.c
[2023-04-01 10:32:04,662 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dfab4243/50ea60fcf9e348eda191afef97d2f7d6/FLAGfa166780d
[2023-04-01 10:32:04,676 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dfab4243/50ea60fcf9e348eda191afef97d2f7d6
[2023-04-01 10:32:04,678 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:32:04,679 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:32:04,680 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:32:04,680 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:32:04,683 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:32:04,684 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:32:04" (1/1) ...
[2023-04-01 10:32:04,686 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee5f931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:04, skipping insertion in model container
[2023-04-01 10:32:04,686 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:32:04" (1/1) ...
[2023-04-01 10:32:04,692 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:32:04,797 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:32:05,058 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label48.c[5703,5716]
[2023-04-01 10:32:05,573 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:32:05,583 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:32:05,609 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label48.c[5703,5716]
[2023-04-01 10:32:05,868 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:32:05,887 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:32:05,887 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:05 WrapperNode
[2023-04-01 10:32:05,887 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:32:05,888 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:32:05,889 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:32:05,889 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:32:05,898 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:05" (1/1) ...
[2023-04-01 10:32:05,899 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:05" (1/1) ...
[2023-04-01 10:32:05,944 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:05" (1/1) ...
[2023-04-01 10:32:05,945 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:05" (1/1) ...
[2023-04-01 10:32:06,019 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:05" (1/1) ...
[2023-04-01 10:32:06,044 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:05" (1/1) ...
[2023-04-01 10:32:06,075 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:05" (1/1) ...
[2023-04-01 10:32:06,086 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:05" (1/1) ...
[2023-04-01 10:32:06,112 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:32:06,113 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:32:06,114 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:32:06,114 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:32:06,115 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:05" (1/1) ...
[2023-04-01 10:32:06,122 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:32:06,131 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:32:06,146 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 10:32:06,157 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 10:32:06,182 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:32:06,183 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:32:06,183 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:32:06,183 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:32:06,183 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:32:06,183 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 10:32:06,183 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:32:06,183 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:32:06,183 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:32:06,183 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 10:32:06,183 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:32:06,184 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:32:06,246 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:32:06,248 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:32:09,196 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:32:15,902 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:32:15,902 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:32:15,906 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:32:15 BoogieIcfgContainer
[2023-04-01 10:32:15,906 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:32:15,908 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:32:15,908 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:32:15,911 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:32:15,911 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:32:04" (1/3) ...
[2023-04-01 10:32:15,912 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff43419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:32:15, skipping insertion in model container
[2023-04-01 10:32:15,912 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:05" (2/3) ...
[2023-04-01 10:32:15,912 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff43419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:32:15, skipping insertion in model container
[2023-04-01 10:32:15,912 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:32:15" (3/3) ...
[2023-04-01 10:32:15,914 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem18_label48.c
[2023-04-01 10:32:15,930 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:32:15,931 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:32:15,993 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:32:16,002 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;@6413a294, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:32:16,003 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:32:16,012 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2023-04-01 10:32:16,018 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:32:16,019 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:32:16,019 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:32:16,021 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:32:16,026 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:32:16,026 INFO  L85        PathProgramCache]: Analyzing trace with hash 314235395, now seen corresponding path program 1 times
[2023-04-01 10:32:16,034 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:32:16,034 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238216782]
[2023-04-01 10:32:16,035 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:32:16,035 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:32:16,140 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:32:16,559 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 10:32:16,559 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:32:16,559 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238216782]
[2023-04-01 10:32:16,560 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238216782] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:32:16,560 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:32:16,560 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:32:16,561 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775212559]
[2023-04-01 10:32:16,562 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:32:16,565 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:32:16,566 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:32:16,596 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:32:16,598 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:32:16,601 INFO  L87              Difference]: Start difference. First operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 10:32:18,733 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:32:18,733 INFO  L93              Difference]: Finished difference Result 1393 states and 2727 transitions.
[2023-04-01 10:32:18,741 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:32:18,742 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 10:32:18,743 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:32:18,769 INFO  L225             Difference]: With dead ends: 1393
[2023-04-01 10:32:18,769 INFO  L226             Difference]: Without dead ends: 921
[2023-04-01 10:32:18,779 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 10:32:18,783 INFO  L413           NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time
[2023-04-01 10:32:18,784 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time]
[2023-04-01 10:32:18,810 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 921 states.
[2023-04-01 10:32:18,877 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919.
[2023-04-01 10:32:18,880 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10)
[2023-04-01 10:32:18,885 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions.
[2023-04-01 10:32:18,886 INFO  L78                 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11
[2023-04-01 10:32:18,887 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:32:18,887 INFO  L495      AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions.
[2023-04-01 10:32:18,887 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 10:32:18,887 INFO  L276                IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions.
[2023-04-01 10:32:18,888 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2023-04-01 10:32:18,889 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:32:18,889 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 10:32:18,889 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:32:18,889 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:32:18,890 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:32:18,890 INFO  L85        PathProgramCache]: Analyzing trace with hash 1043435985, now seen corresponding path program 1 times
[2023-04-01 10:32:18,890 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:32:18,890 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379441837]
[2023-04-01 10:32:18,891 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:32:18,891 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:32:18,912 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:32:19,039 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 10:32:19,039 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:32:19,040 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379441837]
[2023-04-01 10:32:19,040 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379441837] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:32:19,040 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:32:19,040 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:32:19,040 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147391067]
[2023-04-01 10:32:19,040 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:32:19,042 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:32:19,042 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:32:19,042 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:32:19,043 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:32:19,043 INFO  L87              Difference]: Start difference. First operand 919 states and 1512 transitions. Second operand  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:32:21,959 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:32:21,960 INFO  L93              Difference]: Finished difference Result 2781 states and 4622 transitions.
[2023-04-01 10:32:21,960 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:32:21,960 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21
[2023-04-01 10:32:21,961 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:32:21,971 INFO  L225             Difference]: With dead ends: 2781
[2023-04-01 10:32:21,972 INFO  L226             Difference]: Without dead ends: 1867
[2023-04-01 10:32:21,974 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 10:32:21,975 INFO  L413           NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time
[2023-04-01 10:32:21,975 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time]
[2023-04-01 10:32:21,978 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1867 states.
[2023-04-01 10:32:22,041 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822.
[2023-04-01 10:32:22,043 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50)
[2023-04-01 10:32:22,052 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions.
[2023-04-01 10:32:22,053 INFO  L78                 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21
[2023-04-01 10:32:22,053 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:32:22,053 INFO  L495      AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions.
[2023-04-01 10:32:22,053 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:32:22,053 INFO  L276                IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions.
[2023-04-01 10:32:22,054 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2023-04-01 10:32:22,054 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:32:22,055 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:32:22,055 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:32:22,055 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:32:22,056 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:32:22,056 INFO  L85        PathProgramCache]: Analyzing trace with hash 614906889, now seen corresponding path program 1 times
[2023-04-01 10:32:22,056 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:32:22,056 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981370532]
[2023-04-01 10:32:22,056 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:32:22,056 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:32:22,109 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:32:22,262 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 10:32:22,262 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:32:22,262 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981370532]
[2023-04-01 10:32:22,263 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981370532] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:32:22,263 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:32:22,263 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:32:22,263 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510703719]
[2023-04-01 10:32:22,263 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:32:22,263 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:32:22,264 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:32:22,264 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:32:22,264 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:32:22,264 INFO  L87              Difference]: Start difference. First operand 1822 states and 2823 transitions. Second operand  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:32:24,725 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:32:24,725 INFO  L93              Difference]: Finished difference Result 5051 states and 8054 transitions.
[2023-04-01 10:32:24,726 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:32:24,726 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25
[2023-04-01 10:32:24,726 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:32:24,743 INFO  L225             Difference]: With dead ends: 5051
[2023-04-01 10:32:24,743 INFO  L226             Difference]: Without dead ends: 3234
[2023-04-01 10:32:24,749 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 10:32:24,750 INFO  L413           NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time
[2023-04-01 10:32:24,751 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time]
[2023-04-01 10:32:24,754 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3234 states.
[2023-04-01 10:32:24,883 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207.
[2023-04-01 10:32:24,888 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145)
[2023-04-01 10:32:24,899 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions.
[2023-04-01 10:32:24,900 INFO  L78                 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25
[2023-04-01 10:32:24,900 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:32:24,900 INFO  L495      AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions.
[2023-04-01 10:32:24,900 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:32:24,901 INFO  L276                IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions.
[2023-04-01 10:32:24,903 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2023-04-01 10:32:24,903 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:32:24,903 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:32:24,904 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 10:32:24,904 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:32:24,905 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:32:24,905 INFO  L85        PathProgramCache]: Analyzing trace with hash -1647085650, now seen corresponding path program 1 times
[2023-04-01 10:32:24,905 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:32:24,906 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964463926]
[2023-04-01 10:32:24,906 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:32:24,906 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:32:24,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:32:25,059 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 10:32:25,060 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:32:25,060 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964463926]
[2023-04-01 10:32:25,060 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964463926] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:32:25,061 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:32:25,061 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:32:25,061 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786216813]
[2023-04-01 10:32:25,062 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:32:25,062 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:32:25,062 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:32:25,063 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:32:25,063 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:32:25,063 INFO  L87              Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-01 10:32:26,686 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:32:26,686 INFO  L93              Difference]: Finished difference Result 6434 states and 9164 transitions.
[2023-04-01 10:32:26,687 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:32:26,687 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58
[2023-04-01 10:32:26,687 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:32:26,701 INFO  L225             Difference]: With dead ends: 6434
[2023-04-01 10:32:26,701 INFO  L226             Difference]: Without dead ends: 3232
[2023-04-01 10:32:26,708 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 10:32:26,709 INFO  L413           NwaCegarLoop]: 764 mSDtfsCounter, 503 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time
[2023-04-01 10:32:26,710 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 786 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time]
[2023-04-01 10:32:26,713 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3232 states.
[2023-04-01 10:32:26,780 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3207.
[2023-04-01 10:32:26,784 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3207 states, 3152 states have (on average 1.3651649746192893) internal successors, (4303), 3163 states have internal predecessors, (4303), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (132), 26 states have call predecessors, (132), 16 states have call successors, (132)
[2023-04-01 10:32:26,794 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4452 transitions.
[2023-04-01 10:32:26,794 INFO  L78                 Accepts]: Start accepts. Automaton has 3207 states and 4452 transitions. Word has length 58
[2023-04-01 10:32:26,795 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:32:26,795 INFO  L495      AbstractCegarLoop]: Abstraction has 3207 states and 4452 transitions.
[2023-04-01 10:32:26,795 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-01 10:32:26,795 INFO  L276                IsEmpty]: Start isEmpty. Operand 3207 states and 4452 transitions.
[2023-04-01 10:32:26,796 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 69
[2023-04-01 10:32:26,796 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:32:26,796 INFO  L195           NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:32:26,797 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 10:32:26,797 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:32:26,797 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:32:26,797 INFO  L85        PathProgramCache]: Analyzing trace with hash -2119346756, now seen corresponding path program 1 times
[2023-04-01 10:32:26,797 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:32:26,798 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270992138]
[2023-04-01 10:32:26,798 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:32:26,798 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:32:26,831 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:32:26,988 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2023-04-01 10:32:26,988 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:32:26,988 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270992138]
[2023-04-01 10:32:26,988 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270992138] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:32:26,988 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:32:26,989 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:32:26,990 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143662977]
[2023-04-01 10:32:26,990 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:32:26,990 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:32:26,991 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:32:26,991 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:32:26,992 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:32:26,992 INFO  L87              Difference]: Start difference. First operand 3207 states and 4452 transitions. Second operand  has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 10:32:28,879 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:32:28,880 INFO  L93              Difference]: Finished difference Result 9124 states and 12522 transitions.
[2023-04-01 10:32:28,880 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:32:28,881 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 68
[2023-04-01 10:32:28,881 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:32:28,905 INFO  L225             Difference]: With dead ends: 9124
[2023-04-01 10:32:28,906 INFO  L226             Difference]: Without dead ends: 5922
[2023-04-01 10:32:28,914 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 10:32:28,915 INFO  L413           NwaCegarLoop]: 427 mSDtfsCounter, 458 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time
[2023-04-01 10:32:28,915 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 443 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time]
[2023-04-01 10:32:28,921 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5922 states.
[2023-04-01 10:32:29,018 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 5756.
[2023-04-01 10:32:29,029 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5756 states, 5670 states have (on average 1.2407407407407407) internal successors, (7035), 5686 states have internal predecessors, (7035), 29 states have call successors, (29), 29 states have call predecessors, (29), 56 states have return successors, (264), 40 states have call predecessors, (264), 28 states have call successors, (264)
[2023-04-01 10:32:29,042 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 7328 transitions.
[2023-04-01 10:32:29,043 INFO  L78                 Accepts]: Start accepts. Automaton has 5756 states and 7328 transitions. Word has length 68
[2023-04-01 10:32:29,044 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:32:29,044 INFO  L495      AbstractCegarLoop]: Abstraction has 5756 states and 7328 transitions.
[2023-04-01 10:32:29,044 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 10:32:29,045 INFO  L276                IsEmpty]: Start isEmpty. Operand 5756 states and 7328 transitions.
[2023-04-01 10:32:29,053 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 109
[2023-04-01 10:32:29,053 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:32:29,053 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:32:29,053 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-04-01 10:32:29,053 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:32:29,054 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:32:29,054 INFO  L85        PathProgramCache]: Analyzing trace with hash -1246957522, now seen corresponding path program 1 times
[2023-04-01 10:32:29,054 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:32:29,054 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246076806]
[2023-04-01 10:32:29,054 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:32:29,054 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:32:29,104 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:32:29,258 INFO  L134       CoverageAnalysis]: Checked inductivity of 63 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-04-01 10:32:29,258 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:32:29,258 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246076806]
[2023-04-01 10:32:29,258 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246076806] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:32:29,258 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397172554]
[2023-04-01 10:32:29,258 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:32:29,259 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:32:29,259 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:32:29,265 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 10:32:29,295 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 10:32:29,402 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:32:29,407 INFO  L262         TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:32:29,414 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:32:29,541 INFO  L134       CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 10:32:29,541 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:32:29,632 INFO  L134       CoverageAnalysis]: Checked inductivity of 63 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-04-01 10:32:29,632 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [397172554] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:32:29,633 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266263349]
[2023-04-01 10:32:29,709 INFO  L159        IcfgInterpreter]: Started Sifa with 70 locations of interest
[2023-04-01 10:32:29,710 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:32:29,713 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:32:29,717 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:32:29,718 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:32:30,057 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs
[2023-04-01 10:32:30,370 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 48
[2023-04-01 10:32:33,088 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 13
[2023-04-01 10:32:33,504 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 67976 conjuctions. This might take some time...