/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/Problem12_label34.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-03-31 21:59:56,361 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-03-31 21:59:56,362 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-03-31 21:59:56,381 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-03-31 21:59:56,382 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-03-31 21:59:56,383 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-03-31 21:59:56,384 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-03-31 21:59:56,385 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-03-31 21:59:56,386 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-03-31 21:59:56,386 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-03-31 21:59:56,387 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-03-31 21:59:56,388 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-03-31 21:59:56,388 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-03-31 21:59:56,389 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-03-31 21:59:56,390 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-03-31 21:59:56,390 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-03-31 21:59:56,391 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
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[2023-03-31 21:59:56,394 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-03-31 21:59:56,396 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-03-31 21:59:56,401 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-03-31 21:59:56,402 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-03-31 21:59:56,402 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 21:59:56,425 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-03-31 21:59:56,426 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-03-31 21:59:56,426 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-03-31 21:59:56,426 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-03-31 21:59:56,426 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-03-31 21:59:56,427 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-03-31 21:59:56,427 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-03-31 21:59:56,427 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-03-31 21:59:56,431 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-03-31 21:59:56,431 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-03-31 21:59:56,431 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-03-31 21:59:56,432 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-03-31 21:59:56,432 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-03-31 21:59:56,432 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-03-31 21:59:56,432 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-03-31 21:59:56,432 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-03-31 21:59:56,432 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-03-31 21:59:56,432 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-03-31 21:59:56,433 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-03-31 21:59:56,433 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-03-31 21:59:56,433 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-03-31 21:59:56,433 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-03-31 21:59:56,433 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-03-31 21:59:56,433 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-03-31 21:59:56,433 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-03-31 21:59:56,433 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-03-31 21:59:56,433 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-03-31 21:59:56,433 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-03-31 21:59:56,433 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-03-31 21:59:56,434 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-03-31 21:59:56,434 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-03-31 21:59:56,434 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-03-31 21:59:56,434 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 21:59:56,434 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-03-31 21:59:56,434 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-03-31 21:59:56,434 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-03-31 21:59:56,434 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-03-31 21:59:56,434 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-03-31 21:59:56,434 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-03-31 21:59:56,435 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-03-31 21:59:56,435 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-03-31 21:59:56,435 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-03-31 21:59:56,663 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-03-31 21:59:56,684 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-03-31 21:59:56,685 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-03-31 21:59:56,686 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-03-31 21:59:56,687 INFO  L275        PluginConnector]: CDTParser initialized
[2023-03-31 21:59:56,687 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label34.c
[2023-03-31 21:59:57,671 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-03-31 21:59:58,055 INFO  L351              CDTParser]: Found 1 translation units.
[2023-03-31 21:59:58,055 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label34.c
[2023-03-31 21:59:58,070 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d18c3de67/d989ef83312246fa82f3feb591fa360d/FLAG2af4de541
[2023-03-31 21:59:58,079 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d18c3de67/d989ef83312246fa82f3feb591fa360d
[2023-03-31 21:59:58,081 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-03-31 21:59:58,082 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-03-31 21:59:58,082 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-03-31 21:59:58,082 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-03-31 21:59:58,084 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-03-31 21:59:58,085 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:59:58" (1/1) ...
[2023-03-31 21:59:58,085 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@183197e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:58, skipping insertion in model container
[2023-03-31 21:59:58,086 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:59:58" (1/1) ...
[2023-03-31 21:59:58,090 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-03-31 21:59:58,151 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-03-31 21:59:58,281 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/Problem12_label34.c[2340,2353]
[2023-03-31 21:59:58,831 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 21:59:58,838 INFO  L203         MainTranslator]: Completed pre-run
[2023-03-31 21:59:58,854 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/Problem12_label34.c[2340,2353]
[2023-03-31 21:59:59,102 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 21:59:59,118 INFO  L208         MainTranslator]: Completed translation
[2023-03-31 21:59:59,118 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:59 WrapperNode
[2023-03-31 21:59:59,119 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-03-31 21:59:59,120 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-03-31 21:59:59,120 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-03-31 21:59:59,120 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-03-31 21:59:59,130 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:59" (1/1) ...
[2023-03-31 21:59:59,130 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:59" (1/1) ...
[2023-03-31 21:59:59,170 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:59" (1/1) ...
[2023-03-31 21:59:59,170 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:59" (1/1) ...
[2023-03-31 21:59:59,293 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:59" (1/1) ...
[2023-03-31 21:59:59,305 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:59" (1/1) ...
[2023-03-31 21:59:59,341 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:59" (1/1) ...
[2023-03-31 21:59:59,346 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:59" (1/1) ...
[2023-03-31 21:59:59,368 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-03-31 21:59:59,369 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-03-31 21:59:59,369 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-03-31 21:59:59,369 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-03-31 21:59:59,370 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:59" (1/1) ...
[2023-03-31 21:59:59,374 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 21:59:59,380 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 21:59:59,388 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 21:59:59,403 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 21:59:59,411 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-03-31 21:59:59,412 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-03-31 21:59:59,412 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-03-31 21:59:59,412 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-03-31 21:59:59,412 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-03-31 21:59:59,412 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-03-31 21:59:59,412 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2023-03-31 21:59:59,412 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-03-31 21:59:59,412 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-03-31 21:59:59,412 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-03-31 21:59:59,412 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-03-31 21:59:59,412 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2023-03-31 21:59:59,412 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-03-31 21:59:59,412 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-03-31 21:59:59,412 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-03-31 21:59:59,412 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-03-31 21:59:59,413 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-03-31 21:59:59,413 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-03-31 21:59:59,413 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-03-31 21:59:59,413 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-03-31 21:59:59,413 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-03-31 21:59:59,413 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-03-31 21:59:59,413 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-03-31 21:59:59,413 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-03-31 21:59:59,413 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-03-31 21:59:59,475 INFO  L236             CfgBuilder]: Building ICFG
[2023-03-31 21:59:59,476 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-03-31 22:00:02,387 INFO  L277             CfgBuilder]: Performing block encoding
[2023-03-31 22:00:02,918 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-03-31 22:00:02,918 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-03-31 22:00:02,922 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:00:02 BoogieIcfgContainer
[2023-03-31 22:00:02,922 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-03-31 22:00:02,924 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-03-31 22:00:02,924 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-03-31 22:00:02,926 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-03-31 22:00:02,926 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:59:58" (1/3) ...
[2023-03-31 22:00:02,927 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1fef3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:00:02, skipping insertion in model container
[2023-03-31 22:00:02,927 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:59" (2/3) ...
[2023-03-31 22:00:02,927 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1fef3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:00:02, skipping insertion in model container
[2023-03-31 22:00:02,927 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:00:02" (3/3) ...
[2023-03-31 22:00:02,928 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem12_label34.c
[2023-03-31 22:00:02,941 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-03-31 22:00:02,941 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-03-31 22:00:02,998 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-03-31 22:00:03,003 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;@4ea0e56c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-03-31 22:00:03,003 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-03-31 22:00:03,011 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 22:00:03,016 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-03-31 22:00:03,016 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:00:03,017 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:00:03,017 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:00:03,021 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:00:03,021 INFO  L85        PathProgramCache]: Analyzing trace with hash 832849634, now seen corresponding path program 1 times
[2023-03-31 22:00:03,030 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:00:03,031 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600824165]
[2023-03-31 22:00:03,031 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:00:03,032 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:00:03,137 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:00:03,316 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 22:00:03,317 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:00:03,317 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600824165]
[2023-03-31 22:00:03,317 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600824165] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:00:03,318 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:00:03,318 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-03-31 22:00:03,319 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720351972]
[2023-03-31 22:00:03,320 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:00:03,322 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-03-31 22:00:03,323 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:00:03,355 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-03-31 22:00:03,356 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-03-31 22:00:03,359 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 22:00:05,832 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:00:05,832 INFO  L93              Difference]: Finished difference Result 2068 states and 4065 transitions.
[2023-03-31 22:00:05,833 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-03-31 22:00:05,833 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 22:00:05,834 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:00:05,862 INFO  L225             Difference]: With dead ends: 2068
[2023-03-31 22:00:05,862 INFO  L226             Difference]: Without dead ends: 1371
[2023-03-31 22:00:05,867 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 22:00:05,869 INFO  L413           NwaCegarLoop]: 87 mSDtfsCounter, 738 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time
[2023-03-31 22:00:05,869 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 112 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time]
[2023-03-31 22:00:05,896 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1371 states.
[2023-03-31 22:00:05,980 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368.
[2023-03-31 22:00:05,983 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1368 states, 1350 states have (on average 1.9348148148148148) internal successors, (2612), 1350 states have internal predecessors, (2612), 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 22:00:05,986 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2635 transitions.
[2023-03-31 22:00:05,987 INFO  L78                 Accepts]: Start accepts. Automaton has 1368 states and 2635 transitions. Word has length 11
[2023-03-31 22:00:05,988 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:00:05,988 INFO  L495      AbstractCegarLoop]: Abstraction has 1368 states and 2635 transitions.
[2023-03-31 22:00:05,988 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 22:00:05,988 INFO  L276                IsEmpty]: Start isEmpty. Operand 1368 states and 2635 transitions.
[2023-03-31 22:00:05,989 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2023-03-31 22:00:05,989 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:00:05,989 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]
[2023-03-31 22:00:05,989 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-03-31 22:00:05,989 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:00:05,990 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:00:05,990 INFO  L85        PathProgramCache]: Analyzing trace with hash 1487865917, now seen corresponding path program 1 times
[2023-03-31 22:00:05,990 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:00:05,990 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861714381]
[2023-03-31 22:00:05,990 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:00:05,990 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:00:06,038 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:00:06,206 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 22:00:06,206 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:00:06,207 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861714381]
[2023-03-31 22:00:06,207 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861714381] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:00:06,207 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:00:06,207 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-31 22:00:06,207 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093434397]
[2023-03-31 22:00:06,207 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:00:06,208 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 22:00:06,208 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:00:06,209 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 22:00:06,209 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-03-31 22:00:06,209 INFO  L87              Difference]: Start difference. First operand 1368 states and 2635 transitions. Second operand  has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 22:00:09,482 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:00:09,483 INFO  L93              Difference]: Finished difference Result 4148 states and 8004 transitions.
[2023-03-31 22:00:09,483 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-03-31 22:00:09,483 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29
[2023-03-31 22:00:09,483 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:00:09,495 INFO  L225             Difference]: With dead ends: 4148
[2023-03-31 22:00:09,495 INFO  L226             Difference]: Without dead ends: 2785
[2023-03-31 22:00:09,497 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 22:00:09,498 INFO  L413           NwaCegarLoop]: 39 mSDtfsCounter, 2807 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2807 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 4688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time
[2023-03-31 22:00:09,498 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2807 Valid, 101 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time]
[2023-03-31 22:00:09,500 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2785 states.
[2023-03-31 22:00:09,615 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2755.
[2023-03-31 22:00:09,618 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2755 states, 2713 states have (on average 1.6973829708809436) internal successors, (4605), 2717 states have internal predecessors, (4605), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62)
[2023-03-31 22:00:09,626 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4682 transitions.
[2023-03-31 22:00:09,626 INFO  L78                 Accepts]: Start accepts. Automaton has 2755 states and 4682 transitions. Word has length 29
[2023-03-31 22:00:09,626 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:00:09,627 INFO  L495      AbstractCegarLoop]: Abstraction has 2755 states and 4682 transitions.
[2023-03-31 22:00:09,627 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 22:00:09,627 INFO  L276                IsEmpty]: Start isEmpty. Operand 2755 states and 4682 transitions.
[2023-03-31 22:00:09,628 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2023-03-31 22:00:09,629 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:00:09,629 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:00:09,629 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-03-31 22:00:09,629 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:00:09,629 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:00:09,629 INFO  L85        PathProgramCache]: Analyzing trace with hash -749252576, now seen corresponding path program 1 times
[2023-03-31 22:00:09,630 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:00:09,630 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438512860]
[2023-03-31 22:00:09,630 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:00:09,630 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:00:09,662 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:00:09,796 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-03-31 22:00:09,796 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:00:09,797 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438512860]
[2023-03-31 22:00:09,797 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438512860] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 22:00:09,798 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066995299]
[2023-03-31 22:00:09,798 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:00:09,798 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:00:09,798 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:00:09,803 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 22:00:09,807 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 22:00:09,890 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:00:09,893 INFO  L262         TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-03-31 22:00:09,898 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 22:00:09,954 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-03-31 22:00:09,955 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-03-31 22:00:09,955 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066995299] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:00:09,955 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-03-31 22:00:09,955 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-03-31 22:00:09,955 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534558042]
[2023-03-31 22:00:09,955 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:00:09,956 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 22:00:09,956 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:00:09,956 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 22:00:09,956 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-03-31 22:00:09,956 INFO  L87              Difference]: Start difference. First operand 2755 states and 4682 transitions. Second operand  has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 22:00:13,427 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:00:13,427 INFO  L93              Difference]: Finished difference Result 8445 states and 14563 transitions.
[2023-03-31 22:00:13,431 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-03-31 22:00:13,431 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 43
[2023-03-31 22:00:13,432 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:00:13,455 INFO  L225             Difference]: With dead ends: 8445
[2023-03-31 22:00:13,456 INFO  L226             Difference]: Without dead ends: 5695
[2023-03-31 22:00:13,461 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2023-03-31 22:00:13,478 INFO  L413           NwaCegarLoop]: 38 mSDtfsCounter, 2315 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4336 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 5311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 4336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time
[2023-03-31 22:00:13,480 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2315 Valid, 94 Invalid, 5311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 4336 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time]
[2023-03-31 22:00:13,485 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5695 states.
[2023-03-31 22:00:13,652 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5583.
[2023-03-31 22:00:13,659 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5583 states, 5460 states have (on average 1.4923076923076923) internal successors, (8148), 5483 states have internal predecessors, (8148), 27 states have call successors, (27), 27 states have call predecessors, (27), 95 states have return successors, (350), 72 states have call predecessors, (350), 26 states have call successors, (350)
[2023-03-31 22:00:13,670 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8525 transitions.
[2023-03-31 22:00:13,671 INFO  L78                 Accepts]: Start accepts. Automaton has 5583 states and 8525 transitions. Word has length 43
[2023-03-31 22:00:13,671 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:00:13,671 INFO  L495      AbstractCegarLoop]: Abstraction has 5583 states and 8525 transitions.
[2023-03-31 22:00:13,671 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 22:00:13,671 INFO  L276                IsEmpty]: Start isEmpty. Operand 5583 states and 8525 transitions.
[2023-03-31 22:00:13,672 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2023-03-31 22:00:13,672 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:00:13,672 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:00:13,678 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 22:00:13,880 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:00:13,880 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:00:13,880 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:00:13,880 INFO  L85        PathProgramCache]: Analyzing trace with hash 1821536828, now seen corresponding path program 1 times
[2023-03-31 22:00:13,881 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:00:13,881 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106418139]
[2023-03-31 22:00:13,881 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:00:13,881 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:00:13,904 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:00:14,091 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 22:00:14,091 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:00:14,092 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106418139]
[2023-03-31 22:00:14,092 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106418139] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:00:14,092 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 22:00:14,092 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-03-31 22:00:14,092 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706380185]
[2023-03-31 22:00:14,093 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:00:14,093 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 22:00:14,094 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:00:14,094 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 22:00:14,096 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2023-03-31 22:00:14,096 INFO  L87              Difference]: Start difference. First operand 5583 states and 8525 transitions. Second operand  has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 22:00:18,029 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:00:18,029 INFO  L93              Difference]: Finished difference Result 17084 states and 27304 transitions.
[2023-03-31 22:00:18,033 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-03-31 22:00:18,033 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42
[2023-03-31 22:00:18,033 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:00:18,073 INFO  L225             Difference]: With dead ends: 17084
[2023-03-31 22:00:18,073 INFO  L226             Difference]: Without dead ends: 11506
[2023-03-31 22:00:18,086 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2023-03-31 22:00:18,089 INFO  L413           NwaCegarLoop]: 39 mSDtfsCounter, 2079 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4739 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 4739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time
[2023-03-31 22:00:18,090 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2079 Valid, 102 Invalid, 5448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 4739 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time]
[2023-03-31 22:00:18,099 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11506 states.
[2023-03-31 22:00:18,313 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11506 to 11063.
[2023-03-31 22:00:18,328 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 11063 states, 10731 states have (on average 1.3303513186096356) internal successors, (14276), 10821 states have internal predecessors, (14276), 51 states have call successors, (51), 51 states have call predecessors, (51), 280 states have return successors, (1406), 190 states have call predecessors, (1406), 50 states have call successors, (1406)
[2023-03-31 22:00:18,351 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11063 states to 11063 states and 15733 transitions.
[2023-03-31 22:00:18,352 INFO  L78                 Accepts]: Start accepts. Automaton has 11063 states and 15733 transitions. Word has length 42
[2023-03-31 22:00:18,352 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:00:18,352 INFO  L495      AbstractCegarLoop]: Abstraction has 11063 states and 15733 transitions.
[2023-03-31 22:00:18,352 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 22:00:18,352 INFO  L276                IsEmpty]: Start isEmpty. Operand 11063 states and 15733 transitions.
[2023-03-31 22:00:18,359 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 81
[2023-03-31 22:00:18,359 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:00:18,359 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 22:00:18,359 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-03-31 22:00:18,359 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:00:18,360 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:00:18,360 INFO  L85        PathProgramCache]: Analyzing trace with hash -1531438609, now seen corresponding path program 1 times
[2023-03-31 22:00:18,360 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:00:18,361 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656689074]
[2023-03-31 22:00:18,361 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:00:18,361 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:00:18,390 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:00:18,580 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-03-31 22:00:18,581 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:00:18,581 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656689074]
[2023-03-31 22:00:18,581 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656689074] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 22:00:18,581 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356038863]
[2023-03-31 22:00:18,581 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:00:18,581 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:00:18,581 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:00:18,597 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 22:00:18,598 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 22:00:18,723 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:00:18,726 INFO  L262         TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-03-31 22:00:18,729 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 22:00:18,852 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-03-31 22:00:18,852 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-03-31 22:00:18,853 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [356038863] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 22:00:18,853 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-03-31 22:00:18,853 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-03-31 22:00:18,853 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91570119]
[2023-03-31 22:00:18,853 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 22:00:18,853 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-03-31 22:00:18,853 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-03-31 22:00:18,854 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-03-31 22:00:18,854 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-03-31 22:00:18,854 INFO  L87              Difference]: Start difference. First operand 11063 states and 15733 transitions. Second operand  has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 22:00:22,144 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 22:00:22,145 INFO  L93              Difference]: Finished difference Result 28698 states and 43622 transitions.
[2023-03-31 22:00:22,145 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-03-31 22:00:22,145 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 80
[2023-03-31 22:00:22,145 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 22:00:22,195 INFO  L225             Difference]: With dead ends: 28698
[2023-03-31 22:00:22,196 INFO  L226             Difference]: Without dead ends: 17640
[2023-03-31 22:00:22,218 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 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 22:00:22,219 INFO  L413           NwaCegarLoop]: 38 mSDtfsCounter, 2068 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time
[2023-03-31 22:00:22,219 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2068 Valid, 86 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time]
[2023-03-31 22:00:22,231 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17640 states.
[2023-03-31 22:00:22,471 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 16650.
[2023-03-31 22:00:22,499 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16650 states, 16138 states have (on average 1.3328169537737018) internal successors, (21509), 16283 states have internal predecessors, (21509), 76 states have call successors, (76), 76 states have call predecessors, (76), 435 states have return successors, (3154), 290 states have call predecessors, (3154), 75 states have call successors, (3154)
[2023-03-31 22:00:22,525 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 24739 transitions.
[2023-03-31 22:00:22,525 INFO  L78                 Accepts]: Start accepts. Automaton has 16650 states and 24739 transitions. Word has length 80
[2023-03-31 22:00:22,527 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 22:00:22,527 INFO  L495      AbstractCegarLoop]: Abstraction has 16650 states and 24739 transitions.
[2023-03-31 22:00:22,528 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 22:00:22,528 INFO  L276                IsEmpty]: Start isEmpty. Operand 16650 states and 24739 transitions.
[2023-03-31 22:00:22,529 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 91
[2023-03-31 22:00:22,529 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 22:00:22,529 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2023-03-31 22:00:22,553 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-03-31 22:00:22,734 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:00:22,734 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 22:00:22,734 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 22:00:22,735 INFO  L85        PathProgramCache]: Analyzing trace with hash -1808877892, now seen corresponding path program 1 times
[2023-03-31 22:00:22,735 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-03-31 22:00:22,735 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106816171]
[2023-03-31 22:00:22,735 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:00:22,735 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 22:00:22,756 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:00:22,861 INFO  L134       CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2023-03-31 22:00:22,862 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-03-31 22:00:22,862 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106816171]
[2023-03-31 22:00:22,862 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106816171] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 22:00:22,862 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408241626]
[2023-03-31 22:00:22,862 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 22:00:22,862 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 22:00:22,862 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 22:00:22,877 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-03-31 22:00:22,884 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-03-31 22:00:22,980 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 22:00:22,981 INFO  L262         TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-03-31 22:00:22,987 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 22:00:23,050 INFO  L134       CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-03-31 22:00:23,050 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 22:00:23,205 INFO  L134       CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2023-03-31 22:00:23,205 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408241626] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 22:00:23,205 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [402578992]
[2023-03-31 22:00:23,225 INFO  L159        IcfgInterpreter]: Started Sifa with 50 locations of interest
[2023-03-31 22:00:23,225 INFO  L166        IcfgInterpreter]: Building call graph
[2023-03-31 22:00:23,227 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-03-31 22:00:23,231 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-03-31 22:00:23,231 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-03-31 22:00:23,449 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs
[2023-03-31 22:00:23,525 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 10
[2023-03-31 22:00:23,612 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 51
[2023-03-31 22:00:24,164 INFO  L197        IcfgInterpreter]: Interpreting procedure calculate_output with input of size 46 for LOIs
[2023-03-31 22:00:24,278 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 10
[2023-03-31 22:00:25,381 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 51
[2023-03-31 22:00:29,718 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 100560 conjuctions. This might take some time...
[2023-03-31 22:00:44,989 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 1080 conjuctions.