/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 IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 00:42:33,287 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 00:42:33,289 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 00:42:33,331 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2023-04-01 00:42:33,341 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 00:42:33,348 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
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[2023-04-01 00:42:33,378 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 00:42:33,379 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 00:42:33,380 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 00:42:33,405 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 00:42:33,405 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 00:42:33,405 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 00:42:33,406 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 00:42:33,406 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 00:42:33,407 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 00:42:33,407 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 00:42:33,407 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 00:42:33,407 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 00:42:33,407 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 00:42:33,408 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 00:42:33,408 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 00:42:33,408 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 00:42:33,408 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 00:42:33,408 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 00:42:33,408 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 00:42:33,409 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 00:42:33,409 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 00:42:33,409 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 00:42:33,409 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 00:42:33,410 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 00:42:33,410 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 00:42:33,410 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 00:42:33,410 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 00:42:33,410 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 00:42:33,410 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 00:42:33,410 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 00:42:33,410 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 00:42:33,411 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 00:42:33,411 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 00:42:33,411 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 00:42:33,411 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 00:42:33,411 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 00:42:33,411 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 00:42:33,412 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 00:42:33,412 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 00:42:33,412 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 00:42:33,412 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 00:42:33,412 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 00:42:33,412 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 00:42:33,412 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 00:42:33,412 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-04-01 00:42:33,662 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 00:42:33,692 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 00:42:33,695 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 00:42:33,696 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 00:42:33,697 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 00:42:33,698 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c
[2023-04-01 00:42:34,891 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 00:42:35,274 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 00:42:35,275 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c
[2023-04-01 00:42:35,299 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f14cc0daa/8d5b5c454f3a4ac7b6864523e567f49d/FLAG6cfc3db31
[2023-04-01 00:42:35,317 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f14cc0daa/8d5b5c454f3a4ac7b6864523e567f49d
[2023-04-01 00:42:35,319 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 00:42:35,320 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 00:42:35,321 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 00:42:35,322 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 00:42:35,325 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 00:42:35,326 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:42:35" (1/1) ...
[2023-04-01 00:42:35,327 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33da98da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:35, skipping insertion in model container
[2023-04-01 00:42:35,328 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:42:35" (1/1) ...
[2023-04-01 00:42:35,334 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 00:42:35,448 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 00:42:36,075 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/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[39479,39492]
[2023-04-01 00:42:36,390 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 00:42:36,412 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 00:42:36,624 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/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[39479,39492]
[2023-04-01 00:42:36,845 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 00:42:36,872 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 00:42:36,873 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:36 WrapperNode
[2023-04-01 00:42:36,873 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 00:42:36,874 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 00:42:36,874 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 00:42:36,874 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 00:42:36,885 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:36" (1/1) ...
[2023-04-01 00:42:36,886 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:36" (1/1) ...
[2023-04-01 00:42:36,926 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:36" (1/1) ...
[2023-04-01 00:42:36,926 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:36" (1/1) ...
[2023-04-01 00:42:37,002 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:36" (1/1) ...
[2023-04-01 00:42:37,033 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:36" (1/1) ...
[2023-04-01 00:42:37,049 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:36" (1/1) ...
[2023-04-01 00:42:37,065 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:36" (1/1) ...
[2023-04-01 00:42:37,091 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 00:42:37,092 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 00:42:37,092 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 00:42:37,092 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 00:42:37,094 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:36" (1/1) ...
[2023-04-01 00:42:37,100 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 00:42:37,110 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 00:42:37,124 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 00:42:37,152 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 00:42:37,175 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 00:42:37,175 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 00:42:37,175 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 00:42:37,175 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 00:42:37,176 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 00:42:37,176 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 00:42:37,176 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 00:42:37,176 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 00:42:37,176 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 00:42:37,176 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 00:42:37,176 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 00:42:37,176 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 00:42:37,176 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 00:42:37,176 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 00:42:37,176 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 00:42:37,177 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 00:42:37,178 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 00:42:37,178 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 00:42:37,483 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 00:42:37,485 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 00:42:40,118 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 00:42:41,603 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 00:42:41,603 INFO  L302             CfgBuilder]: Removed 0 assume(true) statements.
[2023-04-01 00:42:41,608 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:42:41 BoogieIcfgContainer
[2023-04-01 00:42:41,608 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 00:42:41,610 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 00:42:41,610 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 00:42:41,614 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 00:42:41,614 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:42:35" (1/3) ...
[2023-04-01 00:42:41,615 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590f40a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:42:41, skipping insertion in model container
[2023-04-01 00:42:41,615 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:42:36" (2/3) ...
[2023-04-01 00:42:41,615 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590f40a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:42:41, skipping insertion in model container
[2023-04-01 00:42:41,615 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:42:41" (3/3) ...
[2023-04-01 00:42:41,616 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c
[2023-04-01 00:42:41,634 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 00:42:41,634 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 00:42:41,694 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 00:42:41,700 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;@70be3c90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 00:42:41,700 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 00:42:41,709 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 1232 states, 1218 states have (on average 1.6995073891625616) internal successors, (2070), 1227 states have internal predecessors, (2070), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 00:42:41,740 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 275
[2023-04-01 00:42:41,741 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:42:41,741 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:41,742 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:42:41,746 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:42:41,747 INFO  L85        PathProgramCache]: Analyzing trace with hash 104584996, now seen corresponding path program 1 times
[2023-04-01 00:42:41,754 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:42:41,755 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397241344]
[2023-04-01 00:42:41,755 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:42:41,756 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:42:42,242 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:42:42,759 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 00:42:42,760 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:42:42,760 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397241344]
[2023-04-01 00:42:42,761 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397241344] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:42:42,761 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:42:42,761 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 00:42:42,762 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485056792]
[2023-04-01 00:42:42,763 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:42:42,769 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 00:42:42,770 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:42:42,813 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 00:42:42,814 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:42:42,819 INFO  L87              Difference]: Start difference. First operand  has 1232 states, 1218 states have (on average 1.6995073891625616) internal successors, (2070), 1227 states have internal predecessors, (2070), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand  has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:43,383 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:42:43,383 INFO  L93              Difference]: Finished difference Result 2458 states and 4091 transitions.
[2023-04-01 00:42:43,385 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 00:42:43,386 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274
[2023-04-01 00:42:43,388 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:42:43,412 INFO  L225             Difference]: With dead ends: 2458
[2023-04-01 00:42:43,413 INFO  L226             Difference]: Without dead ends: 1701
[2023-04-01 00:42:43,423 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 00:42:43,429 INFO  L413           NwaCegarLoop]: 2120 mSDtfsCounter, 1029 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 3856 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2023-04-01 00:42:43,430 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 3856 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2023-04-01 00:42:43,449 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1701 states.
[2023-04-01 00:42:43,563 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699.
[2023-04-01 00:42:43,568 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1699 states, 1695 states have (on average 1.5799410029498524) internal successors, (2678), 1695 states have internal predecessors, (2678), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:43,574 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2681 transitions.
[2023-04-01 00:42:43,576 INFO  L78                 Accepts]: Start accepts. Automaton has 1699 states and 2681 transitions. Word has length 274
[2023-04-01 00:42:43,579 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:42:43,579 INFO  L495      AbstractCegarLoop]: Abstraction has 1699 states and 2681 transitions.
[2023-04-01 00:42:43,579 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:43,580 INFO  L276                IsEmpty]: Start isEmpty. Operand 1699 states and 2681 transitions.
[2023-04-01 00:42:43,590 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 285
[2023-04-01 00:42:43,590 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:42:43,590 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:43,591 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 00:42:43,591 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:42:43,592 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:42:43,592 INFO  L85        PathProgramCache]: Analyzing trace with hash -1756597040, now seen corresponding path program 1 times
[2023-04-01 00:42:43,593 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:42:43,593 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760701038]
[2023-04-01 00:42:43,593 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:42:43,594 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:42:43,744 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:42:44,060 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 00:42:44,061 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:42:44,061 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760701038]
[2023-04-01 00:42:44,062 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760701038] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:42:44,062 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:42:44,062 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 00:42:44,062 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571495629]
[2023-04-01 00:42:44,062 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:42:44,065 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 00:42:44,065 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:42:44,066 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 00:42:44,066 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:42:44,067 INFO  L87              Difference]: Start difference. First operand 1699 states and 2681 transitions. Second operand  has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:44,493 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:42:44,494 INFO  L93              Difference]: Finished difference Result 3695 states and 5775 transitions.
[2023-04-01 00:42:44,495 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 00:42:44,497 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284
[2023-04-01 00:42:44,500 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:42:44,515 INFO  L225             Difference]: With dead ends: 3695
[2023-04-01 00:42:44,515 INFO  L226             Difference]: Without dead ends: 2523
[2023-04-01 00:42:44,521 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 00:42:44,523 INFO  L413           NwaCegarLoop]: 1938 mSDtfsCounter, 945 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 3513 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 00:42:44,523 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 3513 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 00:42:44,528 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2523 states.
[2023-04-01 00:42:44,630 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 2521.
[2023-04-01 00:42:44,636 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2521 states, 2517 states have (on average 1.5665474771553436) internal successors, (3943), 2517 states have internal predecessors, (3943), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:44,650 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2521 states to 2521 states and 3946 transitions.
[2023-04-01 00:42:44,650 INFO  L78                 Accepts]: Start accepts. Automaton has 2521 states and 3946 transitions. Word has length 284
[2023-04-01 00:42:44,651 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:42:44,651 INFO  L495      AbstractCegarLoop]: Abstraction has 2521 states and 3946 transitions.
[2023-04-01 00:42:44,652 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:44,652 INFO  L276                IsEmpty]: Start isEmpty. Operand 2521 states and 3946 transitions.
[2023-04-01 00:42:44,658 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 295
[2023-04-01 00:42:44,659 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:42:44,659 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:44,659 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 00:42:44,659 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:42:44,660 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:42:44,660 INFO  L85        PathProgramCache]: Analyzing trace with hash -312897979, now seen corresponding path program 1 times
[2023-04-01 00:42:44,660 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:42:44,660 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878444466]
[2023-04-01 00:42:44,661 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:42:44,661 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:42:44,779 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:42:45,070 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 00:42:45,071 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:42:45,071 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878444466]
[2023-04-01 00:42:45,071 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878444466] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:42:45,072 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:42:45,072 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 00:42:45,072 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905517359]
[2023-04-01 00:42:45,072 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:42:45,073 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 00:42:45,073 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:42:45,074 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 00:42:45,074 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:42:45,075 INFO  L87              Difference]: Start difference. First operand 2521 states and 3946 transitions. Second operand  has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:45,619 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:42:45,619 INFO  L93              Difference]: Finished difference Result 5860 states and 9088 transitions.
[2023-04-01 00:42:45,620 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 00:42:45,620 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294
[2023-04-01 00:42:45,621 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:42:45,638 INFO  L225             Difference]: With dead ends: 5860
[2023-04-01 00:42:45,638 INFO  L226             Difference]: Without dead ends: 3894
[2023-04-01 00:42:45,644 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 00:42:45,645 INFO  L413           NwaCegarLoop]: 1892 mSDtfsCounter, 935 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 00:42:45,646 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 3423 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 00:42:45,651 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3894 states.
[2023-04-01 00:42:45,888 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3892.
[2023-04-01 00:42:45,900 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3892 states, 3888 states have (on average 1.5506687242798354) internal successors, (6029), 3888 states have internal predecessors, (6029), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:45,915 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3892 states to 3892 states and 6032 transitions.
[2023-04-01 00:42:45,915 INFO  L78                 Accepts]: Start accepts. Automaton has 3892 states and 6032 transitions. Word has length 294
[2023-04-01 00:42:45,915 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:42:45,916 INFO  L495      AbstractCegarLoop]: Abstraction has 3892 states and 6032 transitions.
[2023-04-01 00:42:45,916 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:45,916 INFO  L276                IsEmpty]: Start isEmpty. Operand 3892 states and 6032 transitions.
[2023-04-01 00:42:45,924 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 305
[2023-04-01 00:42:45,924 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:42:45,925 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:45,925 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 00:42:45,925 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:42:45,927 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:42:45,927 INFO  L85        PathProgramCache]: Analyzing trace with hash -1990496598, now seen corresponding path program 1 times
[2023-04-01 00:42:45,927 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:42:45,927 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126816443]
[2023-04-01 00:42:45,927 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:42:45,928 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:42:46,057 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:42:46,250 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 00:42:46,250 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:42:46,250 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126816443]
[2023-04-01 00:42:46,251 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126816443] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:42:46,251 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:42:46,251 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 00:42:46,251 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911954760]
[2023-04-01 00:42:46,251 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:42:46,252 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 00:42:46,252 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:42:46,252 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 00:42:46,252 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:42:46,253 INFO  L87              Difference]: Start difference. First operand 3892 states and 6032 transitions. Second operand  has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:46,940 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:42:46,940 INFO  L93              Difference]: Finished difference Result 9398 states and 14424 transitions.
[2023-04-01 00:42:46,941 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 00:42:46,941 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 304
[2023-04-01 00:42:46,942 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:42:46,965 INFO  L225             Difference]: With dead ends: 9398
[2023-04-01 00:42:46,965 INFO  L226             Difference]: Without dead ends: 6089
[2023-04-01 00:42:46,974 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 00:42:46,979 INFO  L413           NwaCegarLoop]: 2039 mSDtfsCounter, 924 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 00:42:46,980 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 3526 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 00:42:46,989 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6089 states.
[2023-04-01 00:42:47,421 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 6087.
[2023-04-01 00:42:47,435 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6087 states, 6083 states have (on average 1.530659214203518) internal successors, (9311), 6083 states have internal predecessors, (9311), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:47,461 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6087 states to 6087 states and 9314 transitions.
[2023-04-01 00:42:47,462 INFO  L78                 Accepts]: Start accepts. Automaton has 6087 states and 9314 transitions. Word has length 304
[2023-04-01 00:42:47,462 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:42:47,462 INFO  L495      AbstractCegarLoop]: Abstraction has 6087 states and 9314 transitions.
[2023-04-01 00:42:47,462 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:47,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 6087 states and 9314 transitions.
[2023-04-01 00:42:47,477 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 315
[2023-04-01 00:42:47,478 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:42:47,478 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:47,478 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 00:42:47,478 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:42:47,479 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:42:47,479 INFO  L85        PathProgramCache]: Analyzing trace with hash -1266170323, now seen corresponding path program 1 times
[2023-04-01 00:42:47,479 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:42:47,479 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694076630]
[2023-04-01 00:42:47,479 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:42:47,480 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:42:47,607 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:42:47,816 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 00:42:47,816 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:42:47,816 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694076630]
[2023-04-01 00:42:47,816 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694076630] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:42:47,816 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:42:47,817 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 00:42:47,817 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437275644]
[2023-04-01 00:42:47,817 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:42:47,817 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 00:42:47,817 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:42:47,819 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 00:42:47,822 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:42:47,823 INFO  L87              Difference]: Start difference. First operand 6087 states and 9314 transitions. Second operand  has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:48,902 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:42:48,902 INFO  L93              Difference]: Finished difference Result 15276 states and 23140 transitions.
[2023-04-01 00:42:48,903 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 00:42:48,903 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314
[2023-04-01 00:42:48,904 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:42:48,960 INFO  L225             Difference]: With dead ends: 15276
[2023-04-01 00:42:48,960 INFO  L226             Difference]: Without dead ends: 9800
[2023-04-01 00:42:48,975 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 00:42:48,977 INFO  L413           NwaCegarLoop]: 1845 mSDtfsCounter, 917 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 3331 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-04-01 00:42:48,978 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 3331 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-04-01 00:42:48,988 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9800 states.
[2023-04-01 00:42:49,796 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9800 to 9798.
[2023-04-01 00:42:49,832 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9798 states, 9794 states have (on average 1.509189299571166) internal successors, (14781), 9794 states have internal predecessors, (14781), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:49,879 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9798 states to 9798 states and 14784 transitions.
[2023-04-01 00:42:49,880 INFO  L78                 Accepts]: Start accepts. Automaton has 9798 states and 14784 transitions. Word has length 314
[2023-04-01 00:42:49,880 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:42:49,880 INFO  L495      AbstractCegarLoop]: Abstraction has 9798 states and 14784 transitions.
[2023-04-01 00:42:49,881 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:42:49,881 INFO  L276                IsEmpty]: Start isEmpty. Operand 9798 states and 14784 transitions.
[2023-04-01 00:42:49,900 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2023-04-01 00:42:49,901 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:42:49,901 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:49,901 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-04-01 00:42:49,901 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:42:49,902 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:42:49,902 INFO  L85        PathProgramCache]: Analyzing trace with hash 797465267, now seen corresponding path program 1 times
[2023-04-01 00:42:49,902 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:42:49,902 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779137742]
[2023-04-01 00:42:49,902 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:42:49,903 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:42:50,757 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:43:00,364 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 00:43:00,365 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:43:00,365 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779137742]
[2023-04-01 00:43:00,365 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779137742] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:43:00,365 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:43:00,365 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22
[2023-04-01 00:43:00,365 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990966614]
[2023-04-01 00:43:00,366 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:43:00,366 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2023-04-01 00:43:00,366 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:43:00,367 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2023-04-01 00:43:00,367 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462
[2023-04-01 00:43:00,368 INFO  L87              Difference]: Start difference. First operand 9798 states and 14784 transitions. Second operand  has 22 states, 22 states have (on average 14.590909090909092) internal successors, (321), 22 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:43:16,948 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:43:16,948 INFO  L93              Difference]: Finished difference Result 47723 states and 74267 transitions.
[2023-04-01 00:43:16,953 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. 
[2023-04-01 00:43:16,953 INFO  L78                 Accepts]: Start accepts. Automaton has  has 22 states, 22 states have (on average 14.590909090909092) internal successors, (321), 22 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 324
[2023-04-01 00:43:16,954 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:43:17,098 INFO  L225             Difference]: With dead ends: 47723
[2023-04-01 00:43:17,099 INFO  L226             Difference]: Without dead ends: 44753
[2023-04-01 00:43:17,126 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=628, Invalid=1724, Unknown=0, NotChecked=0, Total=2352
[2023-04-01 00:43:17,127 INFO  L413           NwaCegarLoop]: 13999 mSDtfsCounter, 17851 mSDsluCounter, 85963 mSDsCounter, 0 mSdLazyCounter, 10435 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17851 SdHoareTripleChecker+Valid, 99962 SdHoareTripleChecker+Invalid, 10558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 10435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time
[2023-04-01 00:43:17,127 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [17851 Valid, 99962 Invalid, 10558 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [123 Valid, 10435 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time]
[2023-04-01 00:43:17,178 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44753 states.