/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label11.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 04:17:15,370 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 04:17:15,372 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-01 04:17:15,392 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-01 04:17:15,392 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 04:17:15,393 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 04:17:15,394 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 04:17:15,395 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-01 04:17:15,396 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-01 04:17:15,396 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 04:17:15,397 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 04:17:15,398 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 04:17:15,398 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-01 04:17:15,398 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-01 04:17:15,399 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-01 04:17:15,400 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 04:17:15,400 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 04:17:15,401 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 04:17:15,402 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 04:17:15,403 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 04:17:15,404 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-01 04:17:15,405 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 04:17:15,406 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 04:17:15,406 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 04:17:15,409 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-04-01 04:17:15,409 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-04-01 04:17:15,409 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-04-01 04:17:15,410 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-04-01 04:17:15,410 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-04-01 04:17:15,411 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-01 04:17:15,411 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-04-01 04:17:15,412 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-01 04:17:15,412 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-01 04:17:15,413 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-01 04:17:15,414 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-04-01 04:17:15,414 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2023-04-01 04:17:15,414 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2023-04-01 04:17:15,415 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2023-04-01 04:17:15,415 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-04-01 04:17:15,416 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-04-01 04:17:15,416 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 04:17:15,417 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-04-01 04:17:15,432 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 04:17:15,433 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 04:17:15,433 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 04:17:15,433 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 04:17:15,434 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 04:17:15,434 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 04:17:15,434 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 04:17:15,434 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 04:17:15,434 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 04:17:15,434 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 04:17:15,434 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 04:17:15,434 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 04:17:15,434 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 04:17:15,435 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 04:17:15,435 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 04:17:15,435 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 04:17:15,435 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 04:17:15,435 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 04:17:15,435 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 04:17:15,436 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 04:17:15,436 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 04:17:15,436 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 04:17:15,436 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 04:17:15,436 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 04:17:15,436 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 04:17:15,436 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 04:17:15,437 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 04:17:15,437 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 04:17:15,437 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 04:17:15,437 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 04:17:15,437 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 04:17:15,437 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 04:17:15,437 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 04:17:15,437 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 04:17:15,438 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 04:17:15,438 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 04:17:15,438 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 04:17:15,438 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 04:17:15,438 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 04:17:15,438 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 04:17:15,438 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 04:17:15,439 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-01 04:17:15,665 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 04:17:15,685 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 04:17:15,687 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 04:17:15,688 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 04:17:15,688 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 04:17:15,689 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label11.c
[2023-04-01 04:17:16,713 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 04:17:16,981 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 04:17:16,982 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label11.c
[2023-04-01 04:17:16,997 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/274726ce7/add57d90e4f14047a732952a615b3704/FLAG060340100
[2023-04-01 04:17:17,008 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/274726ce7/add57d90e4f14047a732952a615b3704
[2023-04-01 04:17:17,011 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 04:17:17,012 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 04:17:17,013 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 04:17:17,013 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 04:17:17,025 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 04:17:17,025 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:17:17" (1/1) ...
[2023-04-01 04:17:17,026 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3e3433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17, skipping insertion in model container
[2023-04-01 04:17:17,026 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:17:17" (1/1) ...
[2023-04-01 04:17:17,032 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 04:17:17,085 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 04:17:17,252 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/Problem16_label11.c[5798,5811]
[2023-04-01 04:17:17,511 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 04:17:17,518 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 04:17:17,540 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/Problem16_label11.c[5798,5811]
[2023-04-01 04:17:17,712 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 04:17:17,724 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 04:17:17,724 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17 WrapperNode
[2023-04-01 04:17:17,725 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 04:17:17,726 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 04:17:17,726 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 04:17:17,726 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 04:17:17,740 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17" (1/1) ...
[2023-04-01 04:17:17,740 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17" (1/1) ...
[2023-04-01 04:17:17,766 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17" (1/1) ...
[2023-04-01 04:17:17,767 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17" (1/1) ...
[2023-04-01 04:17:17,813 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17" (1/1) ...
[2023-04-01 04:17:17,832 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17" (1/1) ...
[2023-04-01 04:17:17,848 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17" (1/1) ...
[2023-04-01 04:17:17,855 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17" (1/1) ...
[2023-04-01 04:17:17,867 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 04:17:17,868 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 04:17:17,868 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 04:17:17,868 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 04:17:17,869 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17" (1/1) ...
[2023-04-01 04:17:17,875 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 04:17:17,883 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 04:17:17,895 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-04-01 04:17:17,913 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-04-01 04:17:17,925 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 04:17:17,926 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 04:17:17,926 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 04:17:17,926 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 04:17:17,926 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 04:17:17,926 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 04:17:17,926 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 04:17:17,926 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 04:17:17,926 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 04:17:17,926 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 04:17:17,927 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 04:17:17,927 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 04:17:17,927 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 04:17:17,927 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 04:17:17,927 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 04:17:17,927 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 04:17:17,927 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 04:17:17,927 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 04:17:17,927 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 04:17:17,927 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 04:17:17,927 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 04:17:17,997 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 04:17:17,999 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 04:17:19,547 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 04:17:20,367 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 04:17:20,367 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 04:17:20,370 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:17:20 BoogieIcfgContainer
[2023-04-01 04:17:20,370 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 04:17:20,374 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 04:17:20,374 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 04:17:20,376 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 04:17:20,376 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:17:17" (1/3) ...
[2023-04-01 04:17:20,377 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5e25f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:17:20, skipping insertion in model container
[2023-04-01 04:17:20,377 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:17" (2/3) ...
[2023-04-01 04:17:20,377 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5e25f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:17:20, skipping insertion in model container
[2023-04-01 04:17:20,377 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:17:20" (3/3) ...
[2023-04-01 04:17:20,378 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem16_label11.c
[2023-04-01 04:17:20,392 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 04:17:20,392 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 04:17:20,440 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 04:17:20,445 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;@351aefd1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 04:17:20,445 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 04:17:20,451 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-04-01 04:17:20,455 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 04:17:20,455 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:17:20,456 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 04:17:20,456 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:17:20,460 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:17:20,461 INFO  L85        PathProgramCache]: Analyzing trace with hash -706728023, now seen corresponding path program 1 times
[2023-04-01 04:17:20,468 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:17:20,468 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186655110]
[2023-04-01 04:17:20,468 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:17:20,469 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:17:20,589 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:17:20,747 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 04:17:20,748 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:17:20,748 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186655110]
[2023-04-01 04:17:20,749 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186655110] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:17:20,749 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:17:20,749 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 04:17:20,750 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203641131]
[2023-04-01 04:17:20,750 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:17:20,753 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 04:17:20,753 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:17:20,769 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 04:17:20,770 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 04:17:20,774 INFO  L87              Difference]: Start difference. First operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 04:17:21,867 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:17:21,867 INFO  L93              Difference]: Finished difference Result 718 states and 1389 transitions.
[2023-04-01 04:17:21,870 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 04:17:21,871 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2023-04-01 04:17:21,872 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:17:21,886 INFO  L225             Difference]: With dead ends: 718
[2023-04-01 04:17:21,886 INFO  L226             Difference]: Without dead ends: 471
[2023-04-01 04:17:21,891 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 04:17:21,894 INFO  L413           NwaCegarLoop]: 68 mSDtfsCounter, 268 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-04-01 04:17:21,895 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 83 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-04-01 04:17:21,910 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 471 states.
[2023-04-01 04:17:21,950 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469.
[2023-04-01 04:17:21,952 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 469 states, 459 states have (on average 1.8540305010893245) internal successors, (851), 459 states have internal predecessors, (851), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2023-04-01 04:17:21,958 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 862 transitions.
[2023-04-01 04:17:21,959 INFO  L78                 Accepts]: Start accepts. Automaton has 469 states and 862 transitions. Word has length 11
[2023-04-01 04:17:21,960 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:17:21,960 INFO  L495      AbstractCegarLoop]: Abstraction has 469 states and 862 transitions.
[2023-04-01 04:17:21,960 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 04:17:21,960 INFO  L276                IsEmpty]: Start isEmpty. Operand 469 states and 862 transitions.
[2023-04-01 04:17:21,961 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2023-04-01 04:17:21,961 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:17:21,962 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]
[2023-04-01 04:17:21,962 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 04:17:21,962 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:17:21,962 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:17:21,962 INFO  L85        PathProgramCache]: Analyzing trace with hash -1082554802, now seen corresponding path program 1 times
[2023-04-01 04:17:21,963 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:17:21,963 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516307218]
[2023-04-01 04:17:21,963 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:17:21,963 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:17:21,987 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:17:22,200 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 04:17:22,201 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:17:22,201 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516307218]
[2023-04-01 04:17:22,201 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516307218] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:17:22,201 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:17:22,201 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 04:17:22,201 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182309315]
[2023-04-01 04:17:22,202 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:17:22,202 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 04:17:22,203 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:17:22,203 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 04:17:22,203 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 04:17:22,204 INFO  L87              Difference]: Start difference. First operand 469 states and 862 transitions. Second operand  has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 04:17:25,600 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2023-04-01 04:17:25,652 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:17:25,652 INFO  L93              Difference]: Finished difference Result 1419 states and 2641 transitions.
[2023-04-01 04:17:25,653 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-04-01 04:17:25,653 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 27
[2023-04-01 04:17:25,654 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:17:25,661 INFO  L225             Difference]: With dead ends: 1419
[2023-04-01 04:17:25,661 INFO  L226             Difference]: Without dead ends: 955
[2023-04-01 04:17:25,663 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-04-01 04:17:25,668 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 720 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time
[2023-04-01 04:17:25,669 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 55 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time]
[2023-04-01 04:17:25,675 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 955 states.
[2023-04-01 04:17:25,722 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 933.
[2023-04-01 04:17:25,724 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 933 states, 915 states have (on average 1.7497267759562842) internal successors, (1601), 919 states have internal predecessors, (1601), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26)
[2023-04-01 04:17:25,727 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1634 transitions.
[2023-04-01 04:17:25,727 INFO  L78                 Accepts]: Start accepts. Automaton has 933 states and 1634 transitions. Word has length 27
[2023-04-01 04:17:25,727 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:17:25,727 INFO  L495      AbstractCegarLoop]: Abstraction has 933 states and 1634 transitions.
[2023-04-01 04:17:25,727 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 04:17:25,728 INFO  L276                IsEmpty]: Start isEmpty. Operand 933 states and 1634 transitions.
[2023-04-01 04:17:25,728 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2023-04-01 04:17:25,728 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:17:25,728 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]
[2023-04-01 04:17:25,728 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 04:17:25,729 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:17:25,729 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:17:25,729 INFO  L85        PathProgramCache]: Analyzing trace with hash 1112512902, now seen corresponding path program 1 times
[2023-04-01 04:17:25,729 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:17:25,729 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893145654]
[2023-04-01 04:17:25,729 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:17:25,729 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:17:25,749 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:17:25,854 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 04:17:25,855 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:17:25,855 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893145654]
[2023-04-01 04:17:25,855 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893145654] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:17:25,855 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:17:25,855 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 04:17:25,855 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973101258]
[2023-04-01 04:17:25,855 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:17:25,856 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 04:17:25,856 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:17:25,856 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 04:17:25,856 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 04:17:25,856 INFO  L87              Difference]: Start difference. First operand 933 states and 1634 transitions. Second operand  has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 04:17:27,051 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:17:27,051 INFO  L93              Difference]: Finished difference Result 2591 states and 4654 transitions.
[2023-04-01 04:17:27,051 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 04:17:27,052 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31
[2023-04-01 04:17:27,052 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:17:27,059 INFO  L225             Difference]: With dead ends: 2591
[2023-04-01 04:17:27,059 INFO  L226             Difference]: Without dead ends: 1663
[2023-04-01 04:17:27,061 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-04-01 04:17:27,061 INFO  L413           NwaCegarLoop]: 17 mSDtfsCounter, 871 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-04-01 04:17:27,062 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 44 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-04-01 04:17:27,063 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1663 states.
[2023-04-01 04:17:27,103 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1631.
[2023-04-01 04:17:27,105 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1631 states, 1594 states have (on average 1.6317440401505645) internal successors, (2601), 1611 states have internal predecessors, (2601), 10 states have call successors, (10), 10 states have call predecessors, (10), 26 states have return successors, (101), 9 states have call predecessors, (101), 9 states have call successors, (101)
[2023-04-01 04:17:27,112 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2712 transitions.
[2023-04-01 04:17:27,112 INFO  L78                 Accepts]: Start accepts. Automaton has 1631 states and 2712 transitions. Word has length 31
[2023-04-01 04:17:27,112 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:17:27,112 INFO  L495      AbstractCegarLoop]: Abstraction has 1631 states and 2712 transitions.
[2023-04-01 04:17:27,112 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 04:17:27,113 INFO  L276                IsEmpty]: Start isEmpty. Operand 1631 states and 2712 transitions.
[2023-04-01 04:17:27,113 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2023-04-01 04:17:27,114 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:17:27,114 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]
[2023-04-01 04:17:27,114 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 04:17:27,114 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:17:27,114 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:17:27,115 INFO  L85        PathProgramCache]: Analyzing trace with hash 964681506, now seen corresponding path program 1 times
[2023-04-01 04:17:27,115 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:17:27,115 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827795176]
[2023-04-01 04:17:27,115 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:17:27,115 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:17:27,137 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:17:27,252 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 04:17:27,252 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:17:27,252 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827795176]
[2023-04-01 04:17:27,252 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827795176] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:17:27,252 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:17:27,252 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 04:17:27,253 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963078634]
[2023-04-01 04:17:27,253 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:17:27,253 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 04:17:27,253 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:17:27,254 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 04:17:27,254 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 04:17:27,254 INFO  L87              Difference]: Start difference. First operand 1631 states and 2712 transitions. Second operand  has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 04:17:28,384 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:17:28,385 INFO  L93              Difference]: Finished difference Result 3755 states and 6262 transitions.
[2023-04-01 04:17:28,385 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 04:17:28,386 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 33
[2023-04-01 04:17:28,386 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:17:28,394 INFO  L225             Difference]: With dead ends: 3755
[2023-04-01 04:17:28,394 INFO  L226             Difference]: Without dead ends: 2129
[2023-04-01 04:17:28,397 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-04-01 04:17:28,400 INFO  L413           NwaCegarLoop]: 17 mSDtfsCounter, 890 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-04-01 04:17:28,401 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 43 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-04-01 04:17:28,404 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2129 states.
[2023-04-01 04:17:28,445 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 2079.
[2023-04-01 04:17:28,448 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2079 states, 2025 states have (on average 1.5491358024691357) internal successors, (3137), 2055 states have internal predecessors, (3137), 12 states have call successors, (12), 12 states have call predecessors, (12), 41 states have return successors, (172), 11 states have call predecessors, (172), 11 states have call successors, (172)
[2023-04-01 04:17:28,456 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 3321 transitions.
[2023-04-01 04:17:28,456 INFO  L78                 Accepts]: Start accepts. Automaton has 2079 states and 3321 transitions. Word has length 33
[2023-04-01 04:17:28,456 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:17:28,456 INFO  L495      AbstractCegarLoop]: Abstraction has 2079 states and 3321 transitions.
[2023-04-01 04:17:28,456 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 04:17:28,457 INFO  L276                IsEmpty]: Start isEmpty. Operand 2079 states and 3321 transitions.
[2023-04-01 04:17:28,461 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2023-04-01 04:17:28,461 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:17:28,461 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]
[2023-04-01 04:17:28,461 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 04:17:28,462 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:17:28,462 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:17:28,462 INFO  L85        PathProgramCache]: Analyzing trace with hash 1578545991, now seen corresponding path program 1 times
[2023-04-01 04:17:28,462 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:17:28,462 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415037057]
[2023-04-01 04:17:28,462 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:17:28,462 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:17:28,476 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:17:28,624 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 04:17:28,624 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:17:28,624 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415037057]
[2023-04-01 04:17:28,625 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415037057] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:17:28,625 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:17:28,625 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 04:17:28,626 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478193776]
[2023-04-01 04:17:28,626 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:17:28,626 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 04:17:28,626 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:17:28,626 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 04:17:28,627 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 04:17:28,627 INFO  L87              Difference]: Start difference. First operand 2079 states and 3321 transitions. Second operand  has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 04:17:29,912 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:17:29,912 INFO  L93              Difference]: Finished difference Result 6006 states and 9910 transitions.
[2023-04-01 04:17:29,912 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 04:17:29,913 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 36
[2023-04-01 04:17:29,914 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:17:29,934 INFO  L225             Difference]: With dead ends: 6006
[2023-04-01 04:17:29,934 INFO  L226             Difference]: Without dead ends: 3932
[2023-04-01 04:17:29,939 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-04-01 04:17:29,947 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 750 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time
[2023-04-01 04:17:29,948 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 48 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time]
[2023-04-01 04:17:29,951 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3932 states.
[2023-04-01 04:17:30,025 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 3676.
[2023-04-01 04:17:30,030 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3676 states, 3594 states have (on average 1.4919309961046188) internal successors, (5362), 3636 states have internal predecessors, (5362), 20 states have call successors, (20), 20 states have call predecessors, (20), 61 states have return successors, (444), 19 states have call predecessors, (444), 19 states have call successors, (444)
[2023-04-01 04:17:30,041 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 5826 transitions.
[2023-04-01 04:17:30,041 INFO  L78                 Accepts]: Start accepts. Automaton has 3676 states and 5826 transitions. Word has length 36
[2023-04-01 04:17:30,042 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:17:30,042 INFO  L495      AbstractCegarLoop]: Abstraction has 3676 states and 5826 transitions.
[2023-04-01 04:17:30,042 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 04:17:30,042 INFO  L276                IsEmpty]: Start isEmpty. Operand 3676 states and 5826 transitions.
[2023-04-01 04:17:30,048 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 122
[2023-04-01 04:17:30,048 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:17:30,049 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 04:17:30,049 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-04-01 04:17:30,049 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:17:30,050 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:17:30,050 INFO  L85        PathProgramCache]: Analyzing trace with hash -1781286535, now seen corresponding path program 1 times
[2023-04-01 04:17:30,050 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:17:30,050 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567010410]
[2023-04-01 04:17:30,050 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:17:30,050 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:17:30,079 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:17:30,302 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-04-01 04:17:30,302 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:17:30,302 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567010410]
[2023-04-01 04:17:30,302 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567010410] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 04:17:30,302 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342349089]
[2023-04-01 04:17:30,303 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:17:30,303 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 04:17:30,303 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 04:17:30,305 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 04:17:30,383 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-01 04:17:30,439 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:17:30,442 INFO  L262         TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-04-01 04:17:30,447 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 04:17:30,589 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 04:17:30,589 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-01 04:17:30,589 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [342349089] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:17:30,590 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-01 04:17:30,590 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-04-01 04:17:30,590 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299785412]
[2023-04-01 04:17:30,590 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:17:30,590 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 04:17:30,590 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:17:30,591 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 04:17:30,591 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-04-01 04:17:30,591 INFO  L87              Difference]: Start difference. First operand 3676 states and 5826 transitions. Second operand  has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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)
[2023-04-01 04:17:31,866 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:17:31,866 INFO  L93              Difference]: Finished difference Result 9375 states and 15401 transitions.
[2023-04-01 04:17:31,866 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 04:17:31,867 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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 121
[2023-04-01 04:17:31,867 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:17:31,886 INFO  L225             Difference]: With dead ends: 9375
[2023-04-01 04:17:31,886 INFO  L226             Difference]: Without dead ends: 5704
[2023-04-01 04:17:31,896 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110
[2023-04-01 04:17:31,896 INFO  L413           NwaCegarLoop]: 16 mSDtfsCounter, 963 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-04-01 04:17:31,897 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 42 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-04-01 04:17:31,902 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5704 states.
[2023-04-01 04:17:31,976 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 3957.
[2023-04-01 04:17:31,980 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3957 states, 3860 states have (on average 1.3676165803108808) internal successors, (5279), 3909 states have internal predecessors, (5279), 24 states have call successors, (24), 24 states have call predecessors, (24), 72 states have return successors, (459), 23 states have call predecessors, (459), 23 states have call successors, (459)
[2023-04-01 04:17:31,987 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3957 states to 3957 states and 5762 transitions.
[2023-04-01 04:17:31,987 INFO  L78                 Accepts]: Start accepts. Automaton has 3957 states and 5762 transitions. Word has length 121
[2023-04-01 04:17:31,987 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:17:31,988 INFO  L495      AbstractCegarLoop]: Abstraction has 3957 states and 5762 transitions.
[2023-04-01 04:17:31,988 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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)
[2023-04-01 04:17:31,988 INFO  L276                IsEmpty]: Start isEmpty. Operand 3957 states and 5762 transitions.
[2023-04-01 04:17:31,990 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 221
[2023-04-01 04:17:31,990 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:17:31,991 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 04:17:31,998 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-04-01 04:17:32,198 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-04-01 04:17:32,198 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:17:32,198 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:17:32,199 INFO  L85        PathProgramCache]: Analyzing trace with hash -1909089915, now seen corresponding path program 1 times
[2023-04-01 04:17:32,199 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:17:32,199 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156775025]
[2023-04-01 04:17:32,199 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:17:32,199 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:17:32,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:17:32,536 INFO  L134       CoverageAnalysis]: Checked inductivity of 197 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked.
[2023-04-01 04:17:32,536 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:17:32,537 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156775025]
[2023-04-01 04:17:32,542 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156775025] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 04:17:32,542 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015579643]
[2023-04-01 04:17:32,542 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:17:32,542 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 04:17:32,542 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 04:17:32,559 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)
[2023-04-01 04:17:32,560 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-04-01 04:17:32,688 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:17:32,691 INFO  L262         TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 04:17:32,706 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 04:17:32,815 INFO  L134       CoverageAnalysis]: Checked inductivity of 197 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 04:17:32,815 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 04:17:33,049 INFO  L134       CoverageAnalysis]: Checked inductivity of 197 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked.
[2023-04-01 04:17:33,050 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015579643] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 04:17:33,050 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1844194230]
[2023-04-01 04:17:33,073 INFO  L159        IcfgInterpreter]: Started Sifa with 90 locations of interest
[2023-04-01 04:17:33,073 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 04:17:33,076 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 04:17:33,080 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 04:17:33,081 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 04:17:33,194 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs
[2023-04-01 04:17:33,354 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 49
[2023-04-01 04:17:58,095 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 216308 conjuctions. This might take some time...