/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label15.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:03:16,675 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 10:03:16,677 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 10:03:16,709 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 10:03:16,711 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 10:03:16,712 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-04-01 10:03:16,717 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 10:03:16,718 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 10:03:16,719 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 10:03:16,719 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-04-01 10:03:16,721 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-01 10:03:16,724 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 10:03:16,725 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 10:03:16,725 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 10:03:16,726 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 10:03:16,730 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 10:03:16,731 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-01 10:03:16,731 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 10:03:16,732 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 10:03:16,733 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 10:03:16,739 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-01 10:03:16,743 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
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[2023-04-01 10:03:16,745 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 10:03:16,745 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:03:16,746 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 10:03:16,769 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:03:16,769 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:03:16,769 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:03:16,769 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:03:16,770 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:03:16,770 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:03:16,770 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:03:16,770 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:03:16,770 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:03:16,770 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:03:16,771 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:03:16,771 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:03:16,771 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:03:16,771 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:03:16,771 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:03:16,771 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:03:16,772 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:03:16,772 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:03:16,772 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:03:16,772 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:03:16,772 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:03:16,772 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:03:16,772 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:03:16,772 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:03:16,772 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:03:16,772 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:03:16,773 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:03:16,773 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:03:16,773 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:03:16,773 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:03:16,773 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:03:16,773 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:03:16,773 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:03:16,773 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:03:16,773 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:03:16,773 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:03:16,773 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:03:16,774 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:03:16,774 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:03:16,774 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:03:16,774 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:03:16,774 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:03:16,933 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:03:16,954 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:03:16,955 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:03:16,956 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:03:16,956 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:03:16,957 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label15.c
[2023-04-01 10:03:17,908 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:03:18,295 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:03:18,296 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label15.c
[2023-04-01 10:03:18,316 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58da04a0f/7b1c62a89af547efb633f77efa87f747/FLAGe1f06b5ae
[2023-04-01 10:03:18,330 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58da04a0f/7b1c62a89af547efb633f77efa87f747
[2023-04-01 10:03:18,332 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:03:18,333 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:03:18,335 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:03:18,335 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:03:18,337 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:03:18,337 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:03:18" (1/1) ...
[2023-04-01 10:03:18,338 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c3a16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:18, skipping insertion in model container
[2023-04-01 10:03:18,339 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:03:18" (1/1) ...
[2023-04-01 10:03:18,343 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:03:18,433 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:03:18,606 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_label15.c[6730,6743]
[2023-04-01 10:03:19,203 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:03:19,209 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:03:19,229 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_label15.c[6730,6743]
[2023-04-01 10:03:19,489 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:03:19,506 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:03:19,506 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:19 WrapperNode
[2023-04-01 10:03:19,506 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:03:19,508 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:03:19,508 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:03:19,508 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:03:19,515 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:19" (1/1) ...
[2023-04-01 10:03:19,515 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:19" (1/1) ...
[2023-04-01 10:03:19,553 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:19" (1/1) ...
[2023-04-01 10:03:19,554 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:19" (1/1) ...
[2023-04-01 10:03:19,672 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:19" (1/1) ...
[2023-04-01 10:03:19,690 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:19" (1/1) ...
[2023-04-01 10:03:19,760 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:19" (1/1) ...
[2023-04-01 10:03:19,768 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:19" (1/1) ...
[2023-04-01 10:03:19,829 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:03:19,829 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:03:19,829 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:03:19,830 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:03:19,830 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:19" (1/1) ...
[2023-04-01 10:03:19,837 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:03:19,844 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:03:19,861 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 10:03:19,881 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 10:03:19,900 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:03:19,900 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:03:19,900 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:03:19,900 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:03:19,900 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:03:19,900 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 10:03:19,900 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2023-04-01 10:03:19,900 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:03:19,900 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:03:19,901 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:03:19,977 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:03:19,978 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:03:22,771 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:03:23,265 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:03:23,266 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:03:23,269 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:03:23 BoogieIcfgContainer
[2023-04-01 10:03:23,269 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:03:23,271 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:03:23,271 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:03:23,273 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:03:23,273 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:03:18" (1/3) ...
[2023-04-01 10:03:23,273 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188a7f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:03:23, skipping insertion in model container
[2023-04-01 10:03:23,273 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:03:19" (2/3) ...
[2023-04-01 10:03:23,274 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188a7f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:03:23, skipping insertion in model container
[2023-04-01 10:03:23,274 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:03:23" (3/3) ...
[2023-04-01 10:03:23,274 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem12_label15.c
[2023-04-01 10:03:23,285 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:03:23,285 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:03:23,331 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:03:23,336 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;@a0bc51e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:03:23,336 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:03:23,342 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)
[2023-04-01 10:03:23,346 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:03:23,346 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:03:23,347 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:03:23,347 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:03:23,351 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:03:23,351 INFO  L85        PathProgramCache]: Analyzing trace with hash 636345857, now seen corresponding path program 1 times
[2023-04-01 10:03:23,358 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:03:23,358 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758817263]
[2023-04-01 10:03:23,359 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:03:23,359 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:03:23,433 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:03:23,559 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 10:03:23,559 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:03:23,559 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758817263]
[2023-04-01 10:03:23,560 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758817263] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:03:23,560 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:03:23,560 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:03:23,561 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841170308]
[2023-04-01 10:03:23,561 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:03:23,564 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:03:23,564 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:03:23,579 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:03:23,580 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:03:23,582 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)
[2023-04-01 10:03:25,851 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:03:25,852 INFO  L93              Difference]: Finished difference Result 2068 states and 4065 transitions.
[2023-04-01 10:03:25,873 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:03:25,874 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 10:03:25,874 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:03:25,911 INFO  L225             Difference]: With dead ends: 2068
[2023-04-01 10:03:25,911 INFO  L226             Difference]: Without dead ends: 1371
[2023-04-01 10:03:25,929 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 10:03:25,932 INFO  L413           NwaCegarLoop]: 130 mSDtfsCounter, 789 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time
[2023-04-01 10:03:25,933 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 155 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time]
[2023-04-01 10:03:25,956 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1371 states.
[2023-04-01 10:03:26,074 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1357.
[2023-04-01 10:03:26,077 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1357 states, 1339 states have (on average 1.9066467513069454) internal successors, (2553), 1339 states have internal predecessors, (2553), 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)
[2023-04-01 10:03:26,104 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2576 transitions.
[2023-04-01 10:03:26,105 INFO  L78                 Accepts]: Start accepts. Automaton has 1357 states and 2576 transitions. Word has length 11
[2023-04-01 10:03:26,106 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:03:26,106 INFO  L495      AbstractCegarLoop]: Abstraction has 1357 states and 2576 transitions.
[2023-04-01 10:03:26,107 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 10:03:26,107 INFO  L276                IsEmpty]: Start isEmpty. Operand 1357 states and 2576 transitions.
[2023-04-01 10:03:26,122 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2023-04-01 10:03:26,122 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:03:26,122 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]
[2023-04-01 10:03:26,122 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:03:26,123 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:03:26,123 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:03:26,123 INFO  L85        PathProgramCache]: Analyzing trace with hash 1138229044, now seen corresponding path program 1 times
[2023-04-01 10:03:26,123 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:03:26,124 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072246142]
[2023-04-01 10:03:26,124 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:03:26,124 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:03:26,171 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:03:26,457 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 10:03:26,457 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:03:26,457 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072246142]
[2023-04-01 10:03:26,458 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072246142] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:03:26,458 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:03:26,458 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:03:26,458 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989992026]
[2023-04-01 10:03:26,458 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:03:26,459 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:03:26,459 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:03:26,459 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:03:26,459 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:03:26,460 INFO  L87              Difference]: Start difference. First operand 1357 states and 2576 transitions. Second operand  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 10:03:29,607 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:03:29,607 INFO  L93              Difference]: Finished difference Result 4113 states and 7854 transitions.
[2023-04-01 10:03:29,608 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:03:29,608 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25
[2023-04-01 10:03:29,608 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:03:29,619 INFO  L225             Difference]: With dead ends: 4113
[2023-04-01 10:03:29,619 INFO  L226             Difference]: Without dead ends: 2761
[2023-04-01 10:03:29,625 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 10:03:29,628 INFO  L413           NwaCegarLoop]: 42 mSDtfsCounter, 2449 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4106 mSolverCounterSat, 889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2449 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 4995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 889 IncrementalHoareTripleChecker+Valid, 4106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time
[2023-04-01 10:03:29,632 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2449 Valid, 108 Invalid, 4995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [889 Valid, 4106 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time]
[2023-04-01 10:03:29,635 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2761 states.
[2023-04-01 10:03:29,720 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2723.
[2023-04-01 10:03:29,725 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2723 states, 2681 states have (on average 1.7582991421111525) internal successors, (4714), 2685 states have internal predecessors, (4714), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74)
[2023-04-01 10:03:29,731 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 4803 transitions.
[2023-04-01 10:03:29,731 INFO  L78                 Accepts]: Start accepts. Automaton has 2723 states and 4803 transitions. Word has length 25
[2023-04-01 10:03:29,731 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:03:29,731 INFO  L495      AbstractCegarLoop]: Abstraction has 2723 states and 4803 transitions.
[2023-04-01 10:03:29,731 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 10:03:29,731 INFO  L276                IsEmpty]: Start isEmpty. Operand 2723 states and 4803 transitions.
[2023-04-01 10:03:29,732 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2023-04-01 10:03:29,732 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:03:29,732 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:03:29,732 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:03:29,732 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:03:29,732 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:03:29,732 INFO  L85        PathProgramCache]: Analyzing trace with hash 396201680, now seen corresponding path program 1 times
[2023-04-01 10:03:29,733 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:03:29,733 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948131408]
[2023-04-01 10:03:29,733 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:03:29,733 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:03:29,776 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:03:29,936 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 10:03:29,936 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:03:29,936 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948131408]
[2023-04-01 10:03:29,936 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948131408] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:03:29,936 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:03:29,936 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:03:29,936 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076514]
[2023-04-01 10:03:29,937 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:03:29,937 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:03:29,937 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:03:29,937 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:03:29,937 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:03:29,937 INFO  L87              Difference]: Start difference. First operand 2723 states and 4803 transitions. Second operand  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-01 10:03:32,540 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:03:32,540 INFO  L93              Difference]: Finished difference Result 6122 states and 11004 transitions.
[2023-04-01 10:03:32,553 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:03:32,553 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27
[2023-04-01 10:03:32,553 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:03:32,565 INFO  L225             Difference]: With dead ends: 6122
[2023-04-01 10:03:32,565 INFO  L226             Difference]: Without dead ends: 3404
[2023-04-01 10:03:32,570 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:03:32,574 INFO  L413           NwaCegarLoop]: 1146 mSDtfsCounter, 777 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 732 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 732 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time
[2023-04-01 10:03:32,574 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 1174 Invalid, 2671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [732 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time]
[2023-04-01 10:03:32,577 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3404 states.
[2023-04-01 10:03:32,623 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 3401.
[2023-04-01 10:03:32,627 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3401 states, 3353 states have (on average 1.578586340590516) internal successors, (5293), 3357 states have internal predecessors, (5293), 18 states have call successors, (18), 18 states have call predecessors, (18), 29 states have return successors, (113), 25 states have call predecessors, (113), 17 states have call successors, (113)
[2023-04-01 10:03:32,634 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 5424 transitions.
[2023-04-01 10:03:32,635 INFO  L78                 Accepts]: Start accepts. Automaton has 3401 states and 5424 transitions. Word has length 27
[2023-04-01 10:03:32,635 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:03:32,635 INFO  L495      AbstractCegarLoop]: Abstraction has 3401 states and 5424 transitions.
[2023-04-01 10:03:32,635 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-01 10:03:32,636 INFO  L276                IsEmpty]: Start isEmpty. Operand 3401 states and 5424 transitions.
[2023-04-01 10:03:32,637 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2023-04-01 10:03:32,637 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:03:32,637 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]
[2023-04-01 10:03:32,637 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 10:03:32,637 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:03:32,638 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:03:32,638 INFO  L85        PathProgramCache]: Analyzing trace with hash -1732339261, now seen corresponding path program 1 times
[2023-04-01 10:03:32,638 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:03:32,638 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840968942]
[2023-04-01 10:03:32,638 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:03:32,638 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:03:32,660 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:03:32,747 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:03:32,748 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:03:32,748 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840968942]
[2023-04-01 10:03:32,748 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840968942] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:03:32,748 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411676937]
[2023-04-01 10:03:32,748 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:03:32,748 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:03:32,748 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:03:32,750 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 10:03:32,784 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 10:03:32,853 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:03:32,855 INFO  L262         TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:03:32,860 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:03:32,915 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:03:32,915 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:03:32,996 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:03:32,996 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411676937] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:03:32,997 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57623173]
[2023-04-01 10:03:33,028 INFO  L159        IcfgInterpreter]: Started Sifa with 23 locations of interest
[2023-04-01 10:03:33,028 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:03:33,030 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:03:33,032 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:03:33,033 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:03:33,322 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs
[2023-04-01 10:03:33,494 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 48
[2023-04-01 10:03:35,677 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 13
[2023-04-01 10:03:37,317 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 172753 conjuctions. This might take some time...