/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/eca-rers2012/Problem15_label59.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-03-31 22:14:40,200 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-03-31 22:14:40,202 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-03-31 22:14:40,236 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-03-31 22:14:40,236 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-03-31 22:14:40,239 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-03-31 22:14:40,242 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-03-31 22:14:40,244 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-03-31 22:14:40,252 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-03-31 22:14:40,253 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-03-31 22:14:40,255 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-03-31 22:14:40,255 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-03-31 22:14:40,258 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
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[2023-03-31 22:14:40,260 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-03-31 22:14:40,261 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-03-31 22:14:40,262 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-03-31 22:14:40,264 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-03-31 22:14:40,269 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
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[2023-03-31 22:14:40,272 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-03-31 22:14:40,273 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-03-31 22:14:40,274 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-03-31 22:14:40,278 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-03-31 22:14:40,279 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2023-03-31 22:14:40,286 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-03-31 22:14:40,287 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-03-31 22:14:40,288 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
[2023-03-31 22:14:40,324 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-03-31 22:14:40,324 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-03-31 22:14:40,325 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-03-31 22:14:40,325 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-03-31 22:14:40,326 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-03-31 22:14:40,326 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-03-31 22:14:40,326 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-03-31 22:14:40,326 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-03-31 22:14:40,326 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-03-31 22:14:40,326 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-03-31 22:14:40,327 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-03-31 22:14:40,327 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-03-31 22:14:40,327 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-03-31 22:14:40,327 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-03-31 22:14:40,328 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-03-31 22:14:40,328 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-03-31 22:14:40,328 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-03-31 22:14:40,328 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-03-31 22:14:40,328 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-03-31 22:14:40,329 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-03-31 22:14:40,329 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-03-31 22:14:40,329 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-03-31 22:14:40,329 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-03-31 22:14:40,329 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-03-31 22:14:40,329 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-03-31 22:14:40,329 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-03-31 22:14:40,330 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-03-31 22:14:40,330 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-03-31 22:14:40,330 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-03-31 22:14:40,330 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-03-31 22:14:40,330 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-03-31 22:14:40,330 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-03-31 22:14:40,330 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 22:14:40,331 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-03-31 22:14:40,331 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-03-31 22:14:40,331 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-03-31 22:14:40,331 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-03-31 22:14:40,331 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-03-31 22:14:40,331 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-03-31 22:14:40,331 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-03-31 22:14:40,331 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-03-31 22:14:40,332 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-03-31 22:14:40,521 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-03-31 22:14:40,539 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-03-31 22:14:40,541 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-03-31 22:14:40,542 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-03-31 22:14:40,542 INFO  L275        PluginConnector]: CDTParser initialized
[2023-03-31 22:14:40,543 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label59.c
[2023-03-31 22:14:41,717 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-03-31 22:14:42,046 INFO  L351              CDTParser]: Found 1 translation units.
[2023-03-31 22:14:42,047 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label59.c
[2023-03-31 22:14:42,068 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/629ffba10/81925da9694b4645a8be1d36fe006ebe/FLAG26a20a4be
[2023-03-31 22:14:42,085 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/629ffba10/81925da9694b4645a8be1d36fe006ebe
[2023-03-31 22:14:42,089 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-03-31 22:14:42,091 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-03-31 22:14:42,092 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-03-31 22:14:42,092 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-03-31 22:14:42,095 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-03-31 22:14:42,096 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:14:42" (1/1) ...
[2023-03-31 22:14:42,098 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a1efbad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:42, skipping insertion in model container
[2023-03-31 22:14:42,098 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:14:42" (1/1) ...
[2023-03-31 22:14:42,105 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-03-31 22:14:42,169 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-03-31 22:14:42,372 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label59.c[6635,6648]
[2023-03-31 22:14:42,804 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 22:14:42,816 INFO  L203         MainTranslator]: Completed pre-run
[2023-03-31 22:14:42,848 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label59.c[6635,6648]
[2023-03-31 22:14:43,026 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 22:14:43,041 INFO  L208         MainTranslator]: Completed translation
[2023-03-31 22:14:43,041 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:43 WrapperNode
[2023-03-31 22:14:43,041 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-03-31 22:14:43,043 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-03-31 22:14:43,043 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-03-31 22:14:43,043 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-03-31 22:14:43,053 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:43" (1/1) ...
[2023-03-31 22:14:43,053 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:43" (1/1) ...
[2023-03-31 22:14:43,092 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:43" (1/1) ...
[2023-03-31 22:14:43,092 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:43" (1/1) ...
[2023-03-31 22:14:43,137 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:43" (1/1) ...
[2023-03-31 22:14:43,147 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:43" (1/1) ...
[2023-03-31 22:14:43,185 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:43" (1/1) ...
[2023-03-31 22:14:43,195 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:43" (1/1) ...
[2023-03-31 22:14:43,215 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-03-31 22:14:43,216 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-03-31 22:14:43,216 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-03-31 22:14:43,216 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-03-31 22:14:43,218 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:43" (1/1) ...
[2023-03-31 22:14:43,224 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 22:14:43,233 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:14:43,250 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)
[2023-03-31 22:14:43,270 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
[2023-03-31 22:14:43,286 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-03-31 22:14:43,286 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-03-31 22:14:43,286 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-03-31 22:14:43,286 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-03-31 22:14:43,286 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-03-31 22:14:43,286 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-03-31 22:14:43,286 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-03-31 22:14:43,286 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-03-31 22:14:43,287 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-03-31 22:14:43,287 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-03-31 22:14:43,287 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-03-31 22:14:43,287 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-03-31 22:14:43,287 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-03-31 22:14:43,287 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-03-31 22:14:43,287 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-03-31 22:14:43,287 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-03-31 22:14:43,287 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-03-31 22:14:43,288 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-03-31 22:14:43,288 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-03-31 22:14:43,288 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-03-31 22:14:43,288 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-03-31 22:14:43,397 INFO  L236             CfgBuilder]: Building ICFG
[2023-03-31 22:14:43,399 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-03-31 22:14:45,818 INFO  L277             CfgBuilder]: Performing block encoding
[2023-03-31 22:14:46,504 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-03-31 22:14:46,505 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-03-31 22:14:46,508 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:14:46 BoogieIcfgContainer
[2023-03-31 22:14:46,508 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-03-31 22:14:46,511 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-03-31 22:14:46,511 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-03-31 22:14:46,514 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-03-31 22:14:46,514 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:14:42" (1/3) ...
[2023-03-31 22:14:46,514 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1478b5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:14:46, skipping insertion in model container
[2023-03-31 22:14:46,515 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:43" (2/3) ...
[2023-03-31 22:14:46,515 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1478b5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:14:46, skipping insertion in model container
[2023-03-31 22:14:46,515 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:14:46" (3/3) ...
[2023-03-31 22:14:46,516 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem15_label59.c
[2023-03-31 22:14:46,533 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-03-31 22:14:46,533 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-03-31 22:14:46,593 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-03-31 22:14:46,602 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;@1ec1af56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-03-31 22:14:46,603 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-03-31 22:14:46,608 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-03-31 22:14:46,614 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-03-31 22:14:46,614 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:14:46,615 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:14:46,616 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:14:46,621 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:14:46,621 INFO  L85        PathProgramCache]: Analyzing trace with hash 271524870, now seen corresponding path program 1 times
[2023-03-31 22:14:46,629 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:14:46,630 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550369051]
[2023-03-31 22:14:46,630 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:14:46,630 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:14:46,770 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:14:47,014 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:14:47,014 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:14:47,015 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550369051]
[2023-03-31 22:14:47,015 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550369051] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:14:47,016 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:14:47,016 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-03-31 22:14:47,017 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542244924]
[2023-03-31 22:14:47,018 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:14:47,021 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-03-31 22:14:47,021 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:14:47,051 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-03-31 22:14:47,051 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 22:14:47,054 INFO  L87              Difference]: Start difference. First operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 22:14:49,038 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:14:49,039 INFO  L93              Difference]: Finished difference Result 718 states and 1389 transitions.
[2023-03-31 22:14:49,040 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-03-31 22:14:49,041 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
[2023-03-31 22:14:49,041 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:14:49,053 INFO  L225             Difference]: With dead ends: 718
[2023-03-31 22:14:49,054 INFO  L226             Difference]: Without dead ends: 471
[2023-03-31 22:14:49,059 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
[2023-03-31 22:14:49,061 INFO  L413           NwaCegarLoop]: 33 mSDtfsCounter, 240 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time
[2023-03-31 22:14:49,062 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 48 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time]
[2023-03-31 22:14:49,078 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 471 states.
[2023-03-31 22:14:49,116 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 442.
[2023-03-31 22:14:49,118 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 442 states, 432 states have (on average 1.9305555555555556) internal successors, (834), 432 states have internal predecessors, (834), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2023-03-31 22:14:49,120 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 845 transitions.
[2023-03-31 22:14:49,122 INFO  L78                 Accepts]: Start accepts. Automaton has 442 states and 845 transitions. Word has length 11
[2023-03-31 22:14:49,122 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:14:49,122 INFO  L495      AbstractCegarLoop]: Abstraction has 442 states and 845 transitions.
[2023-03-31 22:14:49,122 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)
[2023-03-31 22:14:49,123 INFO  L276                IsEmpty]: Start isEmpty. Operand 442 states and 845 transitions.
[2023-03-31 22:14:49,124 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2023-03-31 22:14:49,124 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:14:49,124 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:14:49,124 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-03-31 22:14:49,124 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:14:49,125 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:14:49,125 INFO  L85        PathProgramCache]: Analyzing trace with hash 672360767, now seen corresponding path program 1 times
[2023-03-31 22:14:49,125 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:14:49,125 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543614445]
[2023-03-31 22:14:49,126 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:14:49,126 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:14:49,158 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:14:49,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:14:49,333 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:14:49,334 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543614445]
[2023-03-31 22:14:49,334 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543614445] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:14:49,334 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:14:49,334 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-03-31 22:14:49,334 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279483408]
[2023-03-31 22:14:49,334 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:14:49,336 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-03-31 22:14:49,336 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:14:49,337 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-03-31 22:14:49,338 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 22:14:49,338 INFO  L87              Difference]: Start difference. First operand 442 states and 845 transitions. Second operand  has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-03-31 22:14:50,948 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:14:50,948 INFO  L93              Difference]: Finished difference Result 1312 states and 2535 transitions.
[2023-03-31 22:14:50,950 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-03-31 22:14:50,951 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21
[2023-03-31 22:14:50,951 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:14:50,956 INFO  L225             Difference]: With dead ends: 1312
[2023-03-31 22:14:50,956 INFO  L226             Difference]: Without dead ends: 875
[2023-03-31 22:14:50,957 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
[2023-03-31 22:14:50,958 INFO  L413           NwaCegarLoop]: 429 mSDtfsCounter, 229 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2023-03-31 22:14:50,959 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 445 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2023-03-31 22:14:50,960 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 875 states.
[2023-03-31 22:14:50,993 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 861.
[2023-03-31 22:14:50,995 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 861 states, 847 states have (on average 1.693034238488784) internal successors, (1434), 847 states have internal predecessors, (1434), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18)
[2023-03-31 22:14:50,998 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1459 transitions.
[2023-03-31 22:14:50,999 INFO  L78                 Accepts]: Start accepts. Automaton has 861 states and 1459 transitions. Word has length 21
[2023-03-31 22:14:50,999 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:14:50,999 INFO  L495      AbstractCegarLoop]: Abstraction has 861 states and 1459 transitions.
[2023-03-31 22:14:50,999 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-03-31 22:14:51,000 INFO  L276                IsEmpty]: Start isEmpty. Operand 861 states and 1459 transitions.
[2023-03-31 22:14:51,001 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2023-03-31 22:14:51,001 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:14:51,001 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]
[2023-03-31 22:14:51,001 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-03-31 22:14:51,002 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:14:51,002 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:14:51,002 INFO  L85        PathProgramCache]: Analyzing trace with hash -110487533, now seen corresponding path program 1 times
[2023-03-31 22:14:51,002 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:14:51,003 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759901690]
[2023-03-31 22:14:51,003 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:14:51,003 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:14:51,022 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:14:51,169 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:14:51,169 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:14:51,169 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759901690]
[2023-03-31 22:14:51,169 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759901690] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:14:51,171 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:14:51,171 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-31 22:14:51,171 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76817870]
[2023-03-31 22:14:51,172 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:14:51,172 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 22:14:51,172 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:14:51,173 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 22:14:51,173 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-03-31 22:14:51,174 INFO  L87              Difference]: Start difference. First operand 861 states and 1459 transitions. Second operand  has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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)
[2023-03-31 22:14:53,428 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:14:53,429 INFO  L93              Difference]: Finished difference Result 2621 states and 4538 transitions.
[2023-03-31 22:14:53,429 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-03-31 22:14:53,430 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 42
[2023-03-31 22:14:53,430 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:14:53,443 INFO  L225             Difference]: With dead ends: 2621
[2023-03-31 22:14:53,444 INFO  L226             Difference]: Without dead ends: 1765
[2023-03-31 22:14:53,450 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
[2023-03-31 22:14:53,453 INFO  L413           NwaCegarLoop]: 18 mSDtfsCounter, 709 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time
[2023-03-31 22:14:53,454 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 53 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time]
[2023-03-31 22:14:53,457 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1765 states.
[2023-03-31 22:14:53,514 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1677.
[2023-03-31 22:14:53,517 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1677 states, 1642 states have (on average 1.4476248477466505) internal successors, (2377), 1653 states have internal predecessors, (2377), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (97), 11 states have call predecessors, (97), 11 states have call successors, (97)
[2023-03-31 22:14:53,526 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2486 transitions.
[2023-03-31 22:14:53,527 INFO  L78                 Accepts]: Start accepts. Automaton has 1677 states and 2486 transitions. Word has length 42
[2023-03-31 22:14:53,527 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:14:53,527 INFO  L495      AbstractCegarLoop]: Abstraction has 1677 states and 2486 transitions.
[2023-03-31 22:14:53,528 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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)
[2023-03-31 22:14:53,528 INFO  L276                IsEmpty]: Start isEmpty. Operand 1677 states and 2486 transitions.
[2023-03-31 22:14:53,538 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2023-03-31 22:14:53,538 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:14:53,538 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:14:53,539 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-03-31 22:14:53,539 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:14:53,539 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:14:53,539 INFO  L85        PathProgramCache]: Analyzing trace with hash 1586452341, now seen corresponding path program 1 times
[2023-03-31 22:14:53,539 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:14:53,540 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843215551]
[2023-03-31 22:14:53,540 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:14:53,540 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:14:53,572 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:14:53,815 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-03-31 22:14:53,815 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:14:53,816 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843215551]
[2023-03-31 22:14:53,816 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843215551] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 22:14:53,816 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247536553]
[2023-03-31 22:14:53,816 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:14:53,816 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:14:53,816 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:14:53,819 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)
[2023-03-31 22:14:53,842 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-03-31 22:14:53,940 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:14:53,944 INFO  L262         TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-03-31 22:14:53,951 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 22:14:54,062 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-03-31 22:14:54,063 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-03-31 22:14:54,063 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247536553] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:14:54,063 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-03-31 22:14:54,063 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-03-31 22:14:54,064 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389862671]
[2023-03-31 22:14:54,064 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:14:54,064 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 22:14:54,064 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:14:54,065 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 22:14:54,065 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-03-31 22:14:54,065 INFO  L87              Difference]: Start difference. First operand 1677 states and 2486 transitions. Second operand  has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-03-31 22:14:56,613 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:14:56,613 INFO  L93              Difference]: Finished difference Result 5076 states and 7740 transitions.
[2023-03-31 22:14:56,614 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-03-31 22:14:56,614 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62
[2023-03-31 22:14:56,614 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:14:56,632 INFO  L225             Difference]: With dead ends: 5076
[2023-03-31 22:14:56,632 INFO  L226             Difference]: Without dead ends: 3404
[2023-03-31 22:14:56,639 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2023-03-31 22:14:56,640 INFO  L413           NwaCegarLoop]: 14 mSDtfsCounter, 782 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time
[2023-03-31 22:14:56,640 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 39 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time]
[2023-03-31 22:14:56,644 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3404 states.
[2023-03-31 22:14:56,751 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 2706.
[2023-03-31 22:14:56,756 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2706 states, 2631 states have (on average 1.3112884834663625) internal successors, (3450), 2666 states have internal predecessors, (3450), 20 states have call successors, (20), 20 states have call predecessors, (20), 54 states have return successors, (232), 19 states have call predecessors, (232), 19 states have call successors, (232)
[2023-03-31 22:14:56,767 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 3702 transitions.
[2023-03-31 22:14:56,768 INFO  L78                 Accepts]: Start accepts. Automaton has 2706 states and 3702 transitions. Word has length 62
[2023-03-31 22:14:56,768 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:14:56,768 INFO  L495      AbstractCegarLoop]: Abstraction has 2706 states and 3702 transitions.
[2023-03-31 22:14:56,768 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-03-31 22:14:56,769 INFO  L276                IsEmpty]: Start isEmpty. Operand 2706 states and 3702 transitions.
[2023-03-31 22:14:56,774 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 184
[2023-03-31 22:14:56,775 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:14:56,775 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:14:56,785 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-03-31 22:14:56,981 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:14:56,982 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:14:56,982 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:14:56,982 INFO  L85        PathProgramCache]: Analyzing trace with hash -77750790, now seen corresponding path program 1 times
[2023-03-31 22:14:56,982 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:14:56,983 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911725061]
[2023-03-31 22:14:56,983 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:14:56,983 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:14:57,051 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:14:57,334 INFO  L134       CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:14:57,334 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:14:57,335 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911725061]
[2023-03-31 22:14:57,335 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911725061] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 22:14:57,335 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267298571]
[2023-03-31 22:14:57,336 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:14:57,336 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:14:57,339 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:14:57,340 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-03-31 22:14:57,345 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-03-31 22:14:57,470 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:14:57,473 INFO  L262         TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-03-31 22:14:57,477 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 22:14:57,563 INFO  L134       CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:14:57,564 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 22:14:57,690 INFO  L134       CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 22:14:57,691 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267298571] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 22:14:57,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1267052468]
[2023-03-31 22:14:57,716 INFO  L159        IcfgInterpreter]: Started Sifa with 148 locations of interest
[2023-03-31 22:14:57,717 INFO  L166        IcfgInterpreter]: Building call graph
[2023-03-31 22:14:57,720 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-03-31 22:14:57,724 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-03-31 22:14:57,725 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-03-31 22:14:57,852 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs
[2023-03-31 22:14:58,251 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 48
[2023-03-31 22:14:58,646 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 5502 conjuctions. This might take some time...
[2023-03-31 22:14:58,727 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 74 conjuctions. 
[2023-03-31 22:14:58,766 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 13
[2023-03-31 22:14:59,749 INFO  L197        IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs
[2023-03-31 22:14:59,929 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 48
[2023-03-31 22:15:00,551 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 5502 conjuctions. This might take some time...
[2023-03-31 22:15:00,634 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 74 conjuctions. 
[2023-03-31 22:15:07,423 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 13
[2023-03-31 22:15:08,594 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 128710 conjuctions. This might take some time...