/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/Problem18_label47.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 04:28:31,308 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 04:28:31,309 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-01 04:28:31,336 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-01 04:28:31,336 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 04:28:31,359 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 04:28:31,362 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 04:28:31,378 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-04-01 04:28:31,385 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 04:28:31,386 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 04:28:31,387 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-04-01 04:28:31,393 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 04:28:31,393 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 04:28:31,395 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2023-04-01 04:28:31,401 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 04:28:31,402 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 04:28:31,418 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 04:28:31,422 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-01 04:28:31,423 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
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[2023-04-01 04:28:31,424 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 04:28:31,425 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 04:28:31,425 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 04:28:31,466 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 04:28:31,466 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 04:28:31,467 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 04:28:31,467 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 04:28:31,467 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 04:28:31,467 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 04:28:31,468 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 04:28:31,468 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 04:28:31,468 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 04:28:31,468 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 04:28:31,468 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 04:28:31,468 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 04:28:31,469 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 04:28:31,469 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 04:28:31,469 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 04:28:31,469 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 04:28:31,469 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 04:28:31,469 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 04:28:31,469 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 04:28:31,469 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 04:28:31,470 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 04:28:31,470 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 04:28:31,470 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 04:28:31,470 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 04:28:31,470 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 04:28:31,470 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 04:28:31,470 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 04:28:31,470 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 04:28:31,470 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 04:28:31,470 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 04:28:31,470 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 04:28:31,471 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 04:28:31,471 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 04:28:31,471 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 04:28:31,471 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 04:28:31,471 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 04:28:31,471 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 04:28:31,471 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 04:28:31,471 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 04:28:31,471 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 04:28:31,471 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 04:28:31,472 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-01 04:28:31,638 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 04:28:31,664 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 04:28:31,666 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 04:28:31,667 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 04:28:31,668 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 04:28:31,669 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label47.c
[2023-04-01 04:28:32,937 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 04:28:33,288 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 04:28:33,289 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label47.c
[2023-04-01 04:28:33,300 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/248a52952/03afa81c82d2435ea218c8d299e9ec8f/FLAGcc0d54396
[2023-04-01 04:28:33,310 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/248a52952/03afa81c82d2435ea218c8d299e9ec8f
[2023-04-01 04:28:33,312 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 04:28:33,313 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 04:28:33,314 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 04:28:33,314 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 04:28:33,317 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 04:28:33,317 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:28:33" (1/1) ...
[2023-04-01 04:28:33,318 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1315ac61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:33, skipping insertion in model container
[2023-04-01 04:28:33,318 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:28:33" (1/1) ...
[2023-04-01 04:28:33,323 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 04:28:33,421 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 04:28:33,593 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/Problem18_label47.c[6157,6170]
[2023-04-01 04:28:34,150 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 04:28:34,159 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 04:28:34,178 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/Problem18_label47.c[6157,6170]
[2023-04-01 04:28:34,373 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 04:28:34,388 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 04:28:34,388 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:34 WrapperNode
[2023-04-01 04:28:34,388 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 04:28:34,389 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 04:28:34,389 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 04:28:34,389 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 04:28:34,397 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:34" (1/1) ...
[2023-04-01 04:28:34,397 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:34" (1/1) ...
[2023-04-01 04:28:34,473 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:34" (1/1) ...
[2023-04-01 04:28:34,473 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:34" (1/1) ...
[2023-04-01 04:28:34,531 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:34" (1/1) ...
[2023-04-01 04:28:34,554 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:34" (1/1) ...
[2023-04-01 04:28:34,579 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:34" (1/1) ...
[2023-04-01 04:28:34,589 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:34" (1/1) ...
[2023-04-01 04:28:34,610 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 04:28:34,612 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 04:28:34,612 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 04:28:34,612 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 04:28:34,613 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:34" (1/1) ...
[2023-04-01 04:28:34,619 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 04:28:34,627 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 04:28:34,645 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 04:28:34,670 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 04:28:34,692 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 04:28:34,693 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 04:28:34,693 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 04:28:34,693 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 04:28:34,693 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 04:28:34,693 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 04:28:34,693 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 04:28:34,693 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 04:28:34,693 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 04:28:34,693 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 04:28:34,693 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 04:28:34,693 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 04:28:34,694 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 04:28:34,694 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 04:28:34,694 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 04:28:34,694 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 04:28:34,694 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 04:28:34,694 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 04:28:34,694 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 04:28:34,694 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 04:28:34,694 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 04:28:34,694 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 04:28:34,694 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 04:28:34,764 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 04:28:34,765 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 04:28:37,435 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 04:28:44,206 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 04:28:44,206 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 04:28:44,210 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:28:44 BoogieIcfgContainer
[2023-04-01 04:28:44,211 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 04:28:44,230 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 04:28:44,231 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 04:28:44,233 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 04:28:44,233 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:28:33" (1/3) ...
[2023-04-01 04:28:44,234 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a603e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:28:44, skipping insertion in model container
[2023-04-01 04:28:44,234 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:34" (2/3) ...
[2023-04-01 04:28:44,234 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a603e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:28:44, skipping insertion in model container
[2023-04-01 04:28:44,234 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:28:44" (3/3) ...
[2023-04-01 04:28:44,249 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem18_label47.c
[2023-04-01 04:28:44,278 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 04:28:44,279 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 04:28:44,433 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 04:28:44,452 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;@38500086, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 04:28:44,452 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 04:28:44,457 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2023-04-01 04:28:44,461 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 04:28:44,461 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:28:44,462 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 04:28:44,462 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:28:44,466 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:28:44,466 INFO  L85        PathProgramCache]: Analyzing trace with hash 314328931, now seen corresponding path program 1 times
[2023-04-01 04:28:44,478 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:28:44,479 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080429459]
[2023-04-01 04:28:44,479 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:28:44,479 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:28:44,567 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:28:44,736 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 04:28:44,737 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:28:44,737 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080429459]
[2023-04-01 04:28:44,737 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080429459] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:28:44,737 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:28:44,737 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 04:28:44,738 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036393071]
[2023-04-01 04:28:44,739 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:28:44,741 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 04:28:44,741 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:28:44,792 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 04:28:44,793 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 04:28:44,796 INFO  L87              Difference]: Start difference. First operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 04:28:46,634 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:28:46,635 INFO  L93              Difference]: Finished difference Result 1393 states and 2727 transitions.
[2023-04-01 04:28:46,636 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 04:28:46,637 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 04:28:46,638 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:28:46,658 INFO  L225             Difference]: With dead ends: 1393
[2023-04-01 04:28:46,659 INFO  L226             Difference]: Without dead ends: 921
[2023-04-01 04:28:46,669 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 04:28:46,672 INFO  L413           NwaCegarLoop]: 50 mSDtfsCounter, 482 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 761 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 761 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time
[2023-04-01 04:28:46,672 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 70 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [761 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time]
[2023-04-01 04:28:46,685 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 921 states.
[2023-04-01 04:28:46,750 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 890.
[2023-04-01 04:28:46,752 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 890 states, 876 states have (on average 1.9429223744292237) internal successors, (1702), 876 states have internal predecessors, (1702), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10)
[2023-04-01 04:28:46,755 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1719 transitions.
[2023-04-01 04:28:46,756 INFO  L78                 Accepts]: Start accepts. Automaton has 890 states and 1719 transitions. Word has length 11
[2023-04-01 04:28:46,756 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:28:46,757 INFO  L495      AbstractCegarLoop]: Abstraction has 890 states and 1719 transitions.
[2023-04-01 04:28:46,757 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 04:28:46,757 INFO  L276                IsEmpty]: Start isEmpty. Operand 890 states and 1719 transitions.
[2023-04-01 04:28:46,758 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2023-04-01 04:28:46,758 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:28:46,758 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]
[2023-04-01 04:28:46,758 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 04:28:46,758 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:28:46,759 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:28:46,759 INFO  L85        PathProgramCache]: Analyzing trace with hash -643549611, now seen corresponding path program 1 times
[2023-04-01 04:28:46,759 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:28:46,759 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562046689]
[2023-04-01 04:28:46,759 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:28:46,760 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:28:46,777 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:28:46,908 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 04:28:46,909 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:28:46,909 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562046689]
[2023-04-01 04:28:46,909 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562046689] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:28:46,909 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 04:28:46,909 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 04:28:46,909 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167913320]
[2023-04-01 04:28:46,909 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:28:46,910 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 04:28:46,910 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:28:46,911 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 04:28:46,911 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 04:28:46,911 INFO  L87              Difference]: Start difference. First operand 890 states and 1719 transitions. Second operand  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:28:49,283 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:28:49,283 INFO  L93              Difference]: Finished difference Result 2709 states and 5256 transitions.
[2023-04-01 04:28:49,283 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-04-01 04:28:49,283 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 26
[2023-04-01 04:28:49,284 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:28:49,290 INFO  L225             Difference]: With dead ends: 2709
[2023-04-01 04:28:49,291 INFO  L226             Difference]: Without dead ends: 1824
[2023-04-01 04:28:49,292 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 04:28:49,300 INFO  L413           NwaCegarLoop]: 32 mSDtfsCounter, 1553 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2836 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1553 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time
[2023-04-01 04:28:49,300 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1553 Valid, 91 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2836 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time]
[2023-04-01 04:28:49,302 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1824 states.
[2023-04-01 04:28:49,343 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1587.
[2023-04-01 04:28:49,345 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1587 states, 1556 states have (on average 1.6625964010282777) internal successors, (2587), 1561 states have internal predecessors, (2587), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (48), 15 states have call predecessors, (48), 9 states have call successors, (48)
[2023-04-01 04:28:49,350 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2645 transitions.
[2023-04-01 04:28:49,350 INFO  L78                 Accepts]: Start accepts. Automaton has 1587 states and 2645 transitions. Word has length 26
[2023-04-01 04:28:49,351 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:28:49,351 INFO  L495      AbstractCegarLoop]: Abstraction has 1587 states and 2645 transitions.
[2023-04-01 04:28:49,351 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:28:49,351 INFO  L276                IsEmpty]: Start isEmpty. Operand 1587 states and 2645 transitions.
[2023-04-01 04:28:49,352 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2023-04-01 04:28:49,352 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:28:49,352 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 04:28:49,352 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 04:28:49,353 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:28:49,353 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:28:49,353 INFO  L85        PathProgramCache]: Analyzing trace with hash 377328398, now seen corresponding path program 1 times
[2023-04-01 04:28:49,353 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:28:49,354 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999140335]
[2023-04-01 04:28:49,354 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:28:49,354 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:28:49,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:28:49,490 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-04-01 04:28:49,490 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:28:49,490 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999140335]
[2023-04-01 04:28:49,490 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999140335] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 04:28:49,491 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557506443]
[2023-04-01 04:28:49,491 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:28:49,491 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 04:28:49,491 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 04:28:49,495 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 04:28:49,517 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 04:28:49,586 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:28:49,600 INFO  L262         TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-04-01 04:28:49,604 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 04:28:49,706 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 04:28:49,707 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-01 04:28:49,707 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557506443] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 04:28:49,707 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-01 04:28:49,707 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-04-01 04:28:49,707 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317097302]
[2023-04-01 04:28:49,707 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 04:28:49,708 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 04:28:49,708 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 04:28:49,708 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 04:28:49,708 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-04-01 04:28:49,708 INFO  L87              Difference]: Start difference. First operand 1587 states and 2645 transitions. Second operand  has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:28:51,875 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 04:28:51,876 INFO  L93              Difference]: Finished difference Result 4838 states and 8232 transitions.
[2023-04-01 04:28:51,878 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 04:28:51,879 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 36
[2023-04-01 04:28:51,879 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 04:28:51,894 INFO  L225             Difference]: With dead ends: 4838
[2023-04-01 04:28:51,894 INFO  L226             Difference]: Without dead ends: 3256
[2023-04-01 04:28:51,898 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2023-04-01 04:28:51,900 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 1612 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time
[2023-04-01 04:28:51,901 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 59 Invalid, 3364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2340 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time]
[2023-04-01 04:28:51,904 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3256 states.
[2023-04-01 04:28:51,968 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 2572.
[2023-04-01 04:28:51,972 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2572 states, 2502 states have (on average 1.4548361310951239) internal successors, (3640), 2523 states have internal predecessors, (3640), 15 states have call successors, (15), 15 states have call predecessors, (15), 54 states have return successors, (182), 33 states have call predecessors, (182), 14 states have call successors, (182)
[2023-04-01 04:28:51,982 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 3837 transitions.
[2023-04-01 04:28:51,982 INFO  L78                 Accepts]: Start accepts. Automaton has 2572 states and 3837 transitions. Word has length 36
[2023-04-01 04:28:51,982 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 04:28:51,983 INFO  L495      AbstractCegarLoop]: Abstraction has 2572 states and 3837 transitions.
[2023-04-01 04:28:51,983 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:28:51,983 INFO  L276                IsEmpty]: Start isEmpty. Operand 2572 states and 3837 transitions.
[2023-04-01 04:28:51,990 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 104
[2023-04-01 04:28:51,991 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 04:28:51,991 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2023-04-01 04:28:52,006 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 04:28:52,196 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
[2023-04-01 04:28:52,197 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 04:28:52,198 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 04:28:52,198 INFO  L85        PathProgramCache]: Analyzing trace with hash 1013555716, now seen corresponding path program 1 times
[2023-04-01 04:28:52,198 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 04:28:52,198 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344244556]
[2023-04-01 04:28:52,198 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:28:52,198 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 04:28:52,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:28:52,415 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2023-04-01 04:28:52,415 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 04:28:52,415 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344244556]
[2023-04-01 04:28:52,415 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344244556] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 04:28:52,415 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959063608]
[2023-04-01 04:28:52,415 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 04:28:52,416 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 04:28:52,416 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 04:28:52,417 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 04:28:52,419 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 04:28:52,548 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 04:28:52,550 INFO  L262         TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 04:28:52,553 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 04:28:52,587 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 04:28:52,587 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 04:28:52,653 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2023-04-01 04:28:52,654 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959063608] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 04:28:52,654 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [624717639]
[2023-04-01 04:28:52,669 INFO  L159        IcfgInterpreter]: Started Sifa with 70 locations of interest
[2023-04-01 04:28:52,670 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 04:28:52,672 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 04:28:52,675 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 04:28:52,675 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 04:28:52,760 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs
[2023-04-01 04:28:52,903 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 53
[2023-04-01 04:29:05,940 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 145990 conjuctions. This might take some time...
[2023-04-01 04:29:22,251 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 846 conjuctions. 
[2023-04-01 04:29:26,319 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 8
[2023-04-01 04:29:27,093 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 228232 conjuctions. This might take some time...