/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/Problem13_label48.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-03-31 22:05:14,208 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-03-31 22:05:14,210 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-03-31 22:05:14,252 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-03-31 22:05:14,255 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-03-31 22:05:14,258 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-03-31 22:05:14,260 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-03-31 22:05:14,266 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-03-31 22:05:14,267 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-03-31 22:05:14,268 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-03-31 22:05:14,269 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-03-31 22:05:14,270 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-03-31 22:05:14,271 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-03-31 22:05:14,271 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-03-31 22:05:14,272 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2023-03-31 22:05:14,276 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-03-31 22:05:14,278 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-03-31 22:05:14,281 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
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[2023-03-31 22:05:14,282 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-03-31 22:05:14,283 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-03-31 22:05:14,288 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 22:05:14,311 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-03-31 22:05:14,312 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-03-31 22:05:14,312 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-03-31 22:05:14,312 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-03-31 22:05:14,313 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-03-31 22:05:14,313 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-03-31 22:05:14,313 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-03-31 22:05:14,313 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-03-31 22:05:14,313 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-03-31 22:05:14,313 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-03-31 22:05:14,314 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-03-31 22:05:14,314 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-03-31 22:05:14,314 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-03-31 22:05:14,314 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-03-31 22:05:14,314 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-03-31 22:05:14,314 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-03-31 22:05:14,315 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-03-31 22:05:14,315 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-03-31 22:05:14,315 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-03-31 22:05:14,315 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-03-31 22:05:14,315 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-03-31 22:05:14,315 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-03-31 22:05:14,315 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-03-31 22:05:14,316 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-03-31 22:05:14,316 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-03-31 22:05:14,316 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-03-31 22:05:14,316 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-03-31 22:05:14,316 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-03-31 22:05:14,316 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-03-31 22:05:14,316 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-03-31 22:05:14,316 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-03-31 22:05:14,316 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-03-31 22:05:14,316 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 22:05:14,317 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-03-31 22:05:14,317 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-03-31 22:05:14,317 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-03-31 22:05:14,317 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-03-31 22:05:14,317 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-03-31 22:05:14,317 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-03-31 22:05:14,317 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-03-31 22:05:14,317 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-03-31 22:05:14,317 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-03-31 22:05:14,500 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-03-31 22:05:14,518 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-03-31 22:05:14,519 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-03-31 22:05:14,520 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-03-31 22:05:14,521 INFO  L275        PluginConnector]: CDTParser initialized
[2023-03-31 22:05:14,522 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label48.c
[2023-03-31 22:05:15,760 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-03-31 22:05:16,205 INFO  L351              CDTParser]: Found 1 translation units.
[2023-03-31 22:05:16,206 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label48.c
[2023-03-31 22:05:16,234 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a43657a/36e96f582b26417b9a8506bdbbe5dd80/FLAG8b689abde
[2023-03-31 22:05:16,246 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a43657a/36e96f582b26417b9a8506bdbbe5dd80
[2023-03-31 22:05:16,249 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-03-31 22:05:16,250 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-03-31 22:05:16,251 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-03-31 22:05:16,252 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-03-31 22:05:16,254 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-03-31 22:05:16,255 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:05:16" (1/1) ...
[2023-03-31 22:05:16,255 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a84865e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:16, skipping insertion in model container
[2023-03-31 22:05:16,256 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:05:16" (1/1) ...
[2023-03-31 22:05:16,260 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-03-31 22:05:16,365 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-03-31 22:05:16,522 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/Problem13_label48.c[1234,1247]
[2023-03-31 22:05:17,123 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 22:05:17,131 INFO  L203         MainTranslator]: Completed pre-run
[2023-03-31 22:05:17,141 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/Problem13_label48.c[1234,1247]
[2023-03-31 22:05:17,456 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 22:05:17,477 INFO  L208         MainTranslator]: Completed translation
[2023-03-31 22:05:17,478 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:17 WrapperNode
[2023-03-31 22:05:17,478 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-03-31 22:05:17,479 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-03-31 22:05:17,479 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-03-31 22:05:17,479 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-03-31 22:05:17,487 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:17" (1/1) ...
[2023-03-31 22:05:17,488 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:17" (1/1) ...
[2023-03-31 22:05:17,540 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:17" (1/1) ...
[2023-03-31 22:05:17,541 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:17" (1/1) ...
[2023-03-31 22:05:17,633 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:17" (1/1) ...
[2023-03-31 22:05:17,654 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:17" (1/1) ...
[2023-03-31 22:05:17,691 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:17" (1/1) ...
[2023-03-31 22:05:17,708 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:17" (1/1) ...
[2023-03-31 22:05:17,799 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-03-31 22:05:17,800 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-03-31 22:05:17,800 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-03-31 22:05:17,800 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-03-31 22:05:17,801 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:17" (1/1) ...
[2023-03-31 22:05:17,837 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 22:05:17,845 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:05:17,886 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 22:05:17,903 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 22:05:17,926 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-03-31 22:05:17,926 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-03-31 22:05:17,926 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-03-31 22:05:17,927 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-03-31 22:05:17,928 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-03-31 22:05:17,928 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-03-31 22:05:17,928 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2023-03-31 22:05:17,928 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-03-31 22:05:17,928 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-03-31 22:05:17,928 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-03-31 22:05:17,928 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-03-31 22:05:17,928 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2023-03-31 22:05:17,928 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-03-31 22:05:17,928 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-03-31 22:05:17,928 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-03-31 22:05:17,928 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-03-31 22:05:17,928 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-03-31 22:05:17,929 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-03-31 22:05:17,929 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-03-31 22:05:17,929 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-03-31 22:05:17,929 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-03-31 22:05:17,929 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-03-31 22:05:17,929 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-03-31 22:05:17,929 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-03-31 22:05:17,929 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-03-31 22:05:17,984 INFO  L236             CfgBuilder]: Building ICFG
[2023-03-31 22:05:17,986 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-03-31 22:05:21,713 INFO  L277             CfgBuilder]: Performing block encoding
[2023-03-31 22:05:24,170 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-03-31 22:05:24,170 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-03-31 22:05:24,173 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:05:24 BoogieIcfgContainer
[2023-03-31 22:05:24,173 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-03-31 22:05:24,175 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-03-31 22:05:24,175 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-03-31 22:05:24,177 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-03-31 22:05:24,177 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:05:16" (1/3) ...
[2023-03-31 22:05:24,178 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39601ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:05:24, skipping insertion in model container
[2023-03-31 22:05:24,178 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:17" (2/3) ...
[2023-03-31 22:05:24,178 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39601ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:05:24, skipping insertion in model container
[2023-03-31 22:05:24,178 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:05:24" (3/3) ...
[2023-03-31 22:05:24,179 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem13_label48.c
[2023-03-31 22:05:24,192 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-03-31 22:05:24,192 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-03-31 22:05:24,252 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-03-31 22:05:24,256 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;@244b781, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-03-31 22:05:24,257 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-03-31 22:05:24,264 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-03-31 22:05:24,269 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-03-31 22:05:24,269 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:05:24,269 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:05:24,270 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:05:24,274 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:05:24,274 INFO  L85        PathProgramCache]: Analyzing trace with hash -333138876, now seen corresponding path program 1 times
[2023-03-31 22:05:24,280 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:05:24,281 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467502468]
[2023-03-31 22:05:24,281 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:05:24,281 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:05:24,366 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:05:24,672 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 22:05:24,672 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:05:24,673 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467502468]
[2023-03-31 22:05:24,673 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467502468] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:05:24,673 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:05:24,673 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-03-31 22:05:24,674 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335740957]
[2023-03-31 22:05:24,675 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:05:24,677 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-03-31 22:05:24,677 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:05:24,708 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-03-31 22:05:24,708 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 22:05:24,711 INFO  L87              Difference]: Start difference. First operand  has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 22:05:27,669 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:05:27,669 INFO  L93              Difference]: Finished difference Result 2068 states and 4065 transitions.
[2023-03-31 22:05:27,670 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-03-31 22:05:27,671 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 22:05:27,671 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:05:27,688 INFO  L225             Difference]: With dead ends: 2068
[2023-03-31 22:05:27,688 INFO  L226             Difference]: Without dead ends: 1371
[2023-03-31 22:05:27,695 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 22:05:27,697 INFO  L413           NwaCegarLoop]: 129 mSDtfsCounter, 759 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 2003 mSolverCounterSat, 1048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1048 IncrementalHoareTripleChecker+Valid, 2003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time
[2023-03-31 22:05:27,698 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 155 Invalid, 3051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1048 Valid, 2003 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time]
[2023-03-31 22:05:27,713 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1371 states.
[2023-03-31 22:05:27,776 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1367.
[2023-03-31 22:05:27,779 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1367 states, 1349 states have (on average 1.8910303928836174) internal successors, (2551), 1349 states have internal predecessors, (2551), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14)
[2023-03-31 22:05:27,786 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2574 transitions.
[2023-03-31 22:05:27,788 INFO  L78                 Accepts]: Start accepts. Automaton has 1367 states and 2574 transitions. Word has length 11
[2023-03-31 22:05:27,788 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:05:27,788 INFO  L495      AbstractCegarLoop]: Abstraction has 1367 states and 2574 transitions.
[2023-03-31 22:05:27,788 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 22:05:27,789 INFO  L276                IsEmpty]: Start isEmpty. Operand 1367 states and 2574 transitions.
[2023-03-31 22:05:27,790 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2023-03-31 22:05:27,790 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:05:27,790 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 22:05:27,790 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-03-31 22:05:27,791 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:05:27,791 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:05:27,791 INFO  L85        PathProgramCache]: Analyzing trace with hash 684506152, now seen corresponding path program 1 times
[2023-03-31 22:05:27,792 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:05:27,792 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640897743]
[2023-03-31 22:05:27,792 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:05:27,792 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:05:27,892 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:05:27,983 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 22:05:27,983 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:05:27,983 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640897743]
[2023-03-31 22:05:27,983 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640897743] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:05:27,984 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:05:27,984 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-31 22:05:27,984 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580191117]
[2023-03-31 22:05:27,984 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:05:27,985 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 22:05:27,985 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:05:27,985 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 22:05:27,985 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-03-31 22:05:27,986 INFO  L87              Difference]: Start difference. First operand 1367 states and 2574 transitions. Second operand  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 22:05:31,924 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:05:31,925 INFO  L93              Difference]: Finished difference Result 4166 states and 7863 transitions.
[2023-03-31 22:05:31,925 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-03-31 22:05:31,925 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21
[2023-03-31 22:05:31,926 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:05:31,937 INFO  L225             Difference]: With dead ends: 4166
[2023-03-31 22:05:31,938 INFO  L226             Difference]: Without dead ends: 2804
[2023-03-31 22:05:31,942 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 22:05:31,943 INFO  L413           NwaCegarLoop]: 45 mSDtfsCounter, 2423 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3870 mSolverCounterSat, 1159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2423 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 5029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1159 IncrementalHoareTripleChecker+Valid, 3870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time
[2023-03-31 22:05:31,943 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2423 Valid, 112 Invalid, 5029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1159 Valid, 3870 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time]
[2023-03-31 22:05:31,946 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2804 states.
[2023-03-31 22:05:32,075 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2696.
[2023-03-31 22:05:32,078 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2696 states, 2653 states have (on average 1.598567659253675) internal successors, (4241), 2658 states have internal predecessors, (4241), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75)
[2023-03-31 22:05:32,088 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 4331 transitions.
[2023-03-31 22:05:32,088 INFO  L78                 Accepts]: Start accepts. Automaton has 2696 states and 4331 transitions. Word has length 21
[2023-03-31 22:05:32,088 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:05:32,089 INFO  L495      AbstractCegarLoop]: Abstraction has 2696 states and 4331 transitions.
[2023-03-31 22:05:32,089 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 22:05:32,089 INFO  L276                IsEmpty]: Start isEmpty. Operand 2696 states and 4331 transitions.
[2023-03-31 22:05:32,090 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2023-03-31 22:05:32,090 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:05:32,090 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:05:32,090 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-03-31 22:05:32,090 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:05:32,092 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:05:32,092 INFO  L85        PathProgramCache]: Analyzing trace with hash -96348540, now seen corresponding path program 1 times
[2023-03-31 22:05:32,093 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:05:32,093 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111321253]
[2023-03-31 22:05:32,094 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:05:32,094 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:05:32,130 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:05:32,250 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 22:05:32,250 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:05:32,250 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111321253]
[2023-03-31 22:05:32,250 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111321253] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:05:32,251 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:05:32,251 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-31 22:05:32,252 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558854257]
[2023-03-31 22:05:32,252 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:05:32,252 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 22:05:32,253 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:05:32,254 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 22:05:32,254 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-03-31 22:05:32,254 INFO  L87              Difference]: Start difference. First operand 2696 states and 4331 transitions. Second operand  has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 22:05:36,988 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:05:36,988 INFO  L93              Difference]: Finished difference Result 8329 states and 13704 transitions.
[2023-03-31 22:05:36,989 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-03-31 22:05:36,990 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23
[2023-03-31 22:05:36,990 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:05:37,014 INFO  L225             Difference]: With dead ends: 8329
[2023-03-31 22:05:37,015 INFO  L226             Difference]: Without dead ends: 5638
[2023-03-31 22:05:37,023 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 22:05:37,024 INFO  L413           NwaCegarLoop]: 50 mSDtfsCounter, 2181 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4868 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2181 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 5725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 4868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time
[2023-03-31 22:05:37,024 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2181 Valid, 133 Invalid, 5725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 4868 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time]
[2023-03-31 22:05:37,029 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5638 states.
[2023-03-31 22:05:37,236 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 5510.
[2023-03-31 22:05:37,244 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5510 states, 5379 states have (on average 1.418851087562744) internal successors, (7632), 5410 states have internal predecessors, (7632), 27 states have call successors, (27), 27 states have call predecessors, (27), 103 states have return successors, (421), 72 states have call predecessors, (421), 26 states have call successors, (421)
[2023-03-31 22:05:37,261 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5510 states to 5510 states and 8080 transitions.
[2023-03-31 22:05:37,261 INFO  L78                 Accepts]: Start accepts. Automaton has 5510 states and 8080 transitions. Word has length 23
[2023-03-31 22:05:37,262 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:05:37,262 INFO  L495      AbstractCegarLoop]: Abstraction has 5510 states and 8080 transitions.
[2023-03-31 22:05:37,262 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 22:05:37,263 INFO  L276                IsEmpty]: Start isEmpty. Operand 5510 states and 8080 transitions.
[2023-03-31 22:05:37,264 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2023-03-31 22:05:37,264 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:05:37,264 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:05:37,264 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-03-31 22:05:37,264 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:05:37,265 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:05:37,266 INFO  L85        PathProgramCache]: Analyzing trace with hash 1722687224, now seen corresponding path program 1 times
[2023-03-31 22:05:37,266 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:05:37,266 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635627445]
[2023-03-31 22:05:37,266 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:05:37,266 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:05:37,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:05:37,387 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 22:05:37,387 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:05:37,387 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635627445]
[2023-03-31 22:05:37,387 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635627445] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:05:37,387 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:05:37,388 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-03-31 22:05:37,389 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130292777]
[2023-03-31 22:05:37,389 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:05:37,390 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-03-31 22:05:37,390 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:05:37,390 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-03-31 22:05:37,391 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 22:05:37,391 INFO  L87              Difference]: Start difference. First operand 5510 states and 8080 transitions. Second operand  has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 22:05:40,273 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:05:40,273 INFO  L93              Difference]: Finished difference Result 16445 states and 24894 transitions.
[2023-03-31 22:05:40,281 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-03-31 22:05:40,281 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 45
[2023-03-31 22:05:40,281 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:05:40,323 INFO  L225             Difference]: With dead ends: 16445
[2023-03-31 22:05:40,323 INFO  L226             Difference]: Without dead ends: 10940
[2023-03-31 22:05:40,339 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 22:05:40,340 INFO  L413           NwaCegarLoop]: 280 mSDtfsCounter, 825 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time
[2023-03-31 22:05:40,340 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 302 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time]
[2023-03-31 22:05:40,349 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10940 states.
[2023-03-31 22:05:40,524 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10940 to 9606.
[2023-03-31 22:05:40,538 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 9606 states, 9391 states have (on average 1.3698221701629218) internal successors, (12864), 9441 states have internal predecessors, (12864), 46 states have call successors, (46), 46 states have call predecessors, (46), 168 states have return successors, (1140), 118 states have call predecessors, (1140), 45 states have call successors, (1140)
[2023-03-31 22:05:40,559 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9606 states to 9606 states and 14050 transitions.
[2023-03-31 22:05:40,560 INFO  L78                 Accepts]: Start accepts. Automaton has 9606 states and 14050 transitions. Word has length 45
[2023-03-31 22:05:40,561 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:05:40,561 INFO  L495      AbstractCegarLoop]: Abstraction has 9606 states and 14050 transitions.
[2023-03-31 22:05:40,561 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 22:05:40,561 INFO  L276                IsEmpty]: Start isEmpty. Operand 9606 states and 14050 transitions.
[2023-03-31 22:05:40,569 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 82
[2023-03-31 22:05:40,569 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:05:40,570 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, 1, 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 22:05:40,570 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-03-31 22:05:40,570 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:05:40,570 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:05:40,571 INFO  L85        PathProgramCache]: Analyzing trace with hash -576192515, now seen corresponding path program 1 times
[2023-03-31 22:05:40,571 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:05:40,571 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100959084]
[2023-03-31 22:05:40,571 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:05:40,571 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:05:40,599 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:05:40,834 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-03-31 22:05:40,834 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:05:40,834 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100959084]
[2023-03-31 22:05:40,834 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100959084] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 22:05:40,835 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98383624]
[2023-03-31 22:05:40,835 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:05:40,836 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:05:40,836 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:05:40,851 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 22:05:40,857 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 22:05:40,947 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:05:40,949 INFO  L262         TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-03-31 22:05:40,954 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 22:05:41,066 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-03-31 22:05:41,066 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-03-31 22:05:41,066 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [98383624] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:05:41,066 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-03-31 22:05:41,067 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-03-31 22:05:41,067 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791044945]
[2023-03-31 22:05:41,067 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:05:41,067 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 22:05:41,067 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:05:41,068 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 22:05:41,068 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-03-31 22:05:41,068 INFO  L87              Difference]: Start difference. First operand 9606 states and 14050 transitions. Second operand  has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 22:05:46,427 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:05:46,427 INFO  L93              Difference]: Finished difference Result 29037 states and 45093 transitions.
[2023-03-31 22:05:46,428 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-03-31 22:05:46,428 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 81
[2023-03-31 22:05:46,429 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:05:46,519 INFO  L225             Difference]: With dead ends: 29037
[2023-03-31 22:05:46,520 INFO  L226             Difference]: Without dead ends: 19436
[2023-03-31 22:05:46,551 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2023-03-31 22:05:46,554 INFO  L413           NwaCegarLoop]: 40 mSDtfsCounter, 2038 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 5916 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2038 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 6461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 5916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time
[2023-03-31 22:05:46,554 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2038 Valid, 104 Invalid, 6461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 5916 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time]
[2023-03-31 22:05:46,572 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19436 states.
[2023-03-31 22:05:46,895 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19436 to 19240.
[2023-03-31 22:05:46,927 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19240 states, 18748 states have (on average 1.317580541924472) internal successors, (24702), 18883 states have internal predecessors, (24702), 89 states have call successors, (89), 89 states have call predecessors, (89), 402 states have return successors, (4110), 267 states have call predecessors, (4110), 88 states have call successors, (4110)
[2023-03-31 22:05:46,960 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19240 states to 19240 states and 28901 transitions.
[2023-03-31 22:05:46,961 INFO  L78                 Accepts]: Start accepts. Automaton has 19240 states and 28901 transitions. Word has length 81
[2023-03-31 22:05:46,962 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:05:46,962 INFO  L495      AbstractCegarLoop]: Abstraction has 19240 states and 28901 transitions.
[2023-03-31 22:05:46,963 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 22:05:46,963 INFO  L276                IsEmpty]: Start isEmpty. Operand 19240 states and 28901 transitions.
[2023-03-31 22:05:46,965 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 107
[2023-03-31 22:05:46,965 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:05:46,965 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:05:46,977 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 22:05:47,176 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:05:47,177 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:05:47,178 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:05:47,178 INFO  L85        PathProgramCache]: Analyzing trace with hash -1151147558, now seen corresponding path program 1 times
[2023-03-31 22:05:47,178 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:05:47,179 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124826027]
[2023-03-31 22:05:47,179 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:05:47,179 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:05:47,210 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:05:47,406 INFO  L134       CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2023-03-31 22:05:47,406 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:05:47,406 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124826027]
[2023-03-31 22:05:47,407 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124826027] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 22:05:47,407 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090210698]
[2023-03-31 22:05:47,407 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:05:47,407 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:05:47,407 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:05:47,408 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 22:05:47,433 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 22:05:47,537 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:05:47,539 INFO  L262         TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-03-31 22:05:47,546 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 22:05:47,644 INFO  L134       CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2023-03-31 22:05:47,644 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 22:05:47,838 INFO  L134       CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2023-03-31 22:05:47,839 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090210698] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 22:05:47,839 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [285318499]
[2023-03-31 22:05:47,858 INFO  L159        IcfgInterpreter]: Started Sifa with 50 locations of interest
[2023-03-31 22:05:47,858 INFO  L166        IcfgInterpreter]: Building call graph
[2023-03-31 22:05:47,860 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-03-31 22:05:47,864 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-03-31 22:05:47,864 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-03-31 22:05:47,968 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs
[2023-03-31 22:05:48,297 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 61
[2023-03-31 22:05:48,677 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 11203 conjuctions. This might take some time...
[2023-03-31 22:05:48,757 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 11 conjuctions. 
[2023-03-31 22:05:49,225 INFO  L197        IcfgInterpreter]: Interpreting procedure calculate_output with input of size 56 for LOIs
[2023-03-31 22:05:49,699 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 61
[2023-03-31 22:06:02,054 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 283775 conjuctions. This might take some time...