/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/Problem04_label33.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-02 16:58:50,610 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-02 16:58:50,612 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-02 16:58:50,639 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-02 16:58:50,640 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-02 16:58:50,642 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-02 16:58:50,644 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-02 16:58:50,645 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-02 16:58:50,648 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-02 16:58:50,651 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-02 16:58:50,652 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-02 16:58:50,653 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-02 16:58:50,653 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-02 16:58:50,655 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-02 16:58:50,656 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-02 16:58:50,657 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-02 16:58:50,658 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-02 16:58:50,658 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-02 16:58:50,659 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-02 16:58:50,663 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-02 16:58:50,663 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-02 16:58:50,664 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-02 16:58:50,665 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-02 16:58:50,666 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-02 16:58:50,677 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2023-04-02 16:58:50,677 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2023-04-02 16:58:50,678 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-02 16:58:50,678 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-04-02 16:58:50,679 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-02 16:58:50,679 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-02 16:58:50,679 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-02 16:58:50,680 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-04-02 16:58:50,680 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2023-04-02 16:58:50,680 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-02 16:58:50,681 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-02 16:58:50,682 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
[2023-04-02 16:58:50,703 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-02 16:58:50,703 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-02 16:58:50,703 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-02 16:58:50,704 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-02 16:58:50,704 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-02 16:58:50,704 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-02 16:58:50,704 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-02 16:58:50,704 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-02 16:58:50,704 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-02 16:58:50,705 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-02 16:58:50,705 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-02 16:58:50,705 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-02 16:58:50,705 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-02 16:58:50,705 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-02 16:58:50,705 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-02 16:58:50,706 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-02 16:58:50,706 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-02 16:58:50,706 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-02 16:58:50,706 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-02 16:58:50,706 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-02 16:58:50,706 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-02 16:58:50,706 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-02 16:58:50,706 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-02 16:58:50,707 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-02 16:58:50,707 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-02 16:58:50,707 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-02 16:58:50,707 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-02 16:58:50,707 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-02 16:58:50,707 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-02 16:58:50,707 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-02 16:58:50,707 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-02 16:58:50,707 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-02 16:58:50,707 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-02 16:58:50,708 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-02 16:58:50,708 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-02 16:58:50,708 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-02 16:58:50,708 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-02 16:58:50,708 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-02 16:58:50,708 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-02 16:58:50,708 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-02 16:58:50,708 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-02 16:58:50,708 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain
[2023-04-02 16:58:50,887 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-02 16:58:50,903 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-02 16:58:50,904 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-02 16:58:50,905 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-02 16:58:50,905 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-02 16:58:50,906 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem04_label33.c
[2023-04-02 16:58:51,848 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-02 16:58:52,196 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-02 16:58:52,197 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem04_label33.c
[2023-04-02 16:58:52,219 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a811a29c/fd28163bcb32484ba97c832952f2709f/FLAGe70342f3b
[2023-04-02 16:58:52,233 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a811a29c/fd28163bcb32484ba97c832952f2709f
[2023-04-02 16:58:52,235 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-02 16:58:52,235 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-02 16:58:52,238 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-02 16:58:52,238 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-02 16:58:52,240 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-02 16:58:52,240 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:58:52" (1/1) ...
[2023-04-02 16:58:52,241 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f3e551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:52, skipping insertion in model container
[2023-04-02 16:58:52,241 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:58:52" (1/1) ...
[2023-04-02 16:58:52,246 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-02 16:58:52,338 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-02 16:58:53,048 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/Problem04_label33.c[184006,184019]
[2023-04-02 16:58:53,058 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-02 16:58:53,065 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-02 16:58:53,331 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/Problem04_label33.c[184006,184019]
[2023-04-02 16:58:53,334 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-02 16:58:53,353 INFO  L208         MainTranslator]: Completed translation
[2023-04-02 16:58:53,354 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:53 WrapperNode
[2023-04-02 16:58:53,354 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-02 16:58:53,355 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-02 16:58:53,355 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-02 16:58:53,355 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-02 16:58:53,363 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:53" (1/1) ...
[2023-04-02 16:58:53,363 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:53" (1/1) ...
[2023-04-02 16:58:53,395 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:53" (1/1) ...
[2023-04-02 16:58:53,396 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:53" (1/1) ...
[2023-04-02 16:58:53,459 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:53" (1/1) ...
[2023-04-02 16:58:53,477 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:53" (1/1) ...
[2023-04-02 16:58:53,495 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:53" (1/1) ...
[2023-04-02 16:58:53,517 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:53" (1/1) ...
[2023-04-02 16:58:53,540 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-02 16:58:53,540 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-02 16:58:53,541 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-02 16:58:53,541 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-02 16:58:53,541 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:53" (1/1) ...
[2023-04-02 16:58:53,545 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-02 16:58:53,552 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-02 16:58:53,562 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)
[2023-04-02 16:58:53,638 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
[2023-04-02 16:58:53,646 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-02 16:58:53,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-02 16:58:53,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-02 16:58:53,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-02 16:58:53,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-02 16:58:53,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-02 16:58:53,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2023-04-02 16:58:53,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-02 16:58:53,647 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-02 16:58:53,647 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-02 16:58:53,647 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-02 16:58:53,647 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2023-04-02 16:58:53,647 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-02 16:58:53,647 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-02 16:58:53,648 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-02 16:58:53,648 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-02 16:58:53,648 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-02 16:58:53,648 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-02 16:58:53,648 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-02 16:58:53,648 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-02 16:58:53,648 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-02 16:58:53,648 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-02 16:58:53,649 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-02 16:58:53,649 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-02 16:58:53,649 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-02 16:58:53,742 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-02 16:58:53,744 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-02 16:58:56,392 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-02 16:58:56,584 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-02 16:58:56,584 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-02 16:58:56,587 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:58:56 BoogieIcfgContainer
[2023-04-02 16:58:56,587 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-02 16:58:56,589 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-02 16:58:56,589 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-02 16:58:56,591 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-02 16:58:56,591 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:58:52" (1/3) ...
[2023-04-02 16:58:56,592 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b54e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:58:56, skipping insertion in model container
[2023-04-02 16:58:56,592 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:53" (2/3) ...
[2023-04-02 16:58:56,592 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b54e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:58:56, skipping insertion in model container
[2023-04-02 16:58:56,592 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:58:56" (3/3) ...
[2023-04-02 16:58:56,593 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem04_label33.c
[2023-04-02 16:58:56,604 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-02 16:58:56,605 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-02 16:58:56,646 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-02 16:58:56,650 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;@2b3b3ef9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-02 16:58:56,651 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-02 16:58:56,656 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 785 states, 771 states have (on average 1.9779507133592737) internal successors, (1525), 772 states have internal predecessors, (1525), 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)
[2023-04-02 16:58:56,684 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 768
[2023-04-02 16:58:56,684 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 16:58:56,685 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-04-02 16:58:56,685 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 16:58:56,692 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 16:58:56,692 INFO  L85        PathProgramCache]: Analyzing trace with hash -1101335625, now seen corresponding path program 1 times
[2023-04-02 16:58:56,699 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 16:58:56,699 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154586425]
[2023-04-02 16:58:56,700 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 16:58:56,700 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 16:58:57,043 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 16:58:59,126 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 16:58:59,127 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 16:58:59,127 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154586425]
[2023-04-02 16:58:59,128 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154586425] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 16:58:59,128 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 16:58:59,128 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-02 16:58:59,129 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617048849]
[2023-04-02 16:58:59,129 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 16:58:59,134 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-02 16:58:59,134 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 16:58:59,159 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-02 16:58:59,160 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-02 16:58:59,163 INFO  L87              Difference]: Start difference. First operand  has 785 states, 771 states have (on average 1.9779507133592737) internal successors, (1525), 772 states have internal predecessors, (1525), 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 253.33333333333334) internal successors, (760), 2 states have internal predecessors, (760), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-02 16:59:01,865 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 16:59:01,866 INFO  L93              Difference]: Finished difference Result 2343 states and 4615 transitions.
[2023-04-02 16:59:01,877 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-02 16:59:01,878 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 2 states have internal predecessors, (760), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 767
[2023-04-02 16:59:01,883 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 16:59:01,904 INFO  L225             Difference]: With dead ends: 2343
[2023-04-02 16:59:01,905 INFO  L226             Difference]: Without dead ends: 1555
[2023-04-02 16:59:01,909 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-02 16:59:01,911 INFO  L413           NwaCegarLoop]: 212 mSDtfsCounter, 202 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 2162 mSolverCounterSat, 1179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1179 IncrementalHoareTripleChecker+Valid, 2162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time
[2023-04-02 16:59:01,912 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 241 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1179 Valid, 2162 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time]
[2023-04-02 16:59:01,925 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1555 states.
[2023-04-02 16:59:02,002 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555.
[2023-04-02 16:59:02,005 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1555 states, 1535 states have (on average 1.860586319218241) internal successors, (2856), 1535 states have internal predecessors, (2856), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17)
[2023-04-02 16:59:02,010 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2883 transitions.
[2023-04-02 16:59:02,011 INFO  L78                 Accepts]: Start accepts. Automaton has 1555 states and 2883 transitions. Word has length 767
[2023-04-02 16:59:02,013 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 16:59:02,013 INFO  L495      AbstractCegarLoop]: Abstraction has 1555 states and 2883 transitions.
[2023-04-02 16:59:02,014 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 2 states have internal predecessors, (760), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-02 16:59:02,014 INFO  L276                IsEmpty]: Start isEmpty. Operand 1555 states and 2883 transitions.
[2023-04-02 16:59:02,028 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 787
[2023-04-02 16:59:02,028 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 16:59:02,028 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-04-02 16:59:02,029 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-02 16:59:02,029 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 16:59:02,029 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 16:59:02,030 INFO  L85        PathProgramCache]: Analyzing trace with hash -161815665, now seen corresponding path program 1 times
[2023-04-02 16:59:02,030 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 16:59:02,030 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906694310]
[2023-04-02 16:59:02,030 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 16:59:02,031 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 16:59:02,193 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 16:59:04,423 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 16:59:04,424 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 16:59:04,424 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906694310]
[2023-04-02 16:59:04,424 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906694310] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-02 16:59:04,424 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012598984]
[2023-04-02 16:59:04,425 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 16:59:04,426 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-02 16:59:04,426 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-02 16:59:04,428 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)
[2023-04-02 16:59:04,472 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-02 16:59:04,710 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 16:59:04,716 INFO  L262         TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 10 conjunts are in the unsatisfiable core
[2023-04-02 16:59:04,746 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-02 16:59:05,543 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 16:59:05,544 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-02 16:59:05,547 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012598984] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 16:59:05,547 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-02 16:59:05,547 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2023-04-02 16:59:05,548 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719230705]
[2023-04-02 16:59:05,549 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 16:59:05,552 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-02 16:59:05,552 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 16:59:05,556 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-02 16:59:05,556 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2023-04-02 16:59:05,557 INFO  L87              Difference]: Start difference. First operand 1555 states and 2883 transitions. Second operand  has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-02 16:59:08,063 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 16:59:08,063 INFO  L93              Difference]: Finished difference Result 4653 states and 8686 transitions.
[2023-04-02 16:59:08,065 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-02 16:59:08,065 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 786
[2023-04-02 16:59:08,066 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 16:59:08,077 INFO  L225             Difference]: With dead ends: 4653
[2023-04-02 16:59:08,078 INFO  L226             Difference]: Without dead ends: 3103
[2023-04-02 16:59:08,081 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 791 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2023-04-02 16:59:08,082 INFO  L413           NwaCegarLoop]: 1423 mSDtfsCounter, 39 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 893 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 3153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 893 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time
[2023-04-02 16:59:08,083 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1454 Invalid, 3153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [893 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time]
[2023-04-02 16:59:08,087 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3103 states.
[2023-04-02 16:59:08,126 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 3103.
[2023-04-02 16:59:08,129 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3103 states, 3067 states have (on average 1.720247799152266) internal successors, (5276), 3067 states have internal predecessors, (5276), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (65), 17 states have call predecessors, (65), 17 states have call successors, (65)
[2023-04-02 16:59:08,138 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 5359 transitions.
[2023-04-02 16:59:08,139 INFO  L78                 Accepts]: Start accepts. Automaton has 3103 states and 5359 transitions. Word has length 786
[2023-04-02 16:59:08,140 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 16:59:08,140 INFO  L495      AbstractCegarLoop]: Abstraction has 3103 states and 5359 transitions.
[2023-04-02 16:59:08,140 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)
[2023-04-02 16:59:08,140 INFO  L276                IsEmpty]: Start isEmpty. Operand 3103 states and 5359 transitions.
[2023-04-02 16:59:08,155 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 789
[2023-04-02 16:59:08,155 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 16:59:08,155 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-04-02 16:59:08,165 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-04-02 16:59:08,362 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-02 16:59:08,362 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 16:59:08,363 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 16:59:08,363 INFO  L85        PathProgramCache]: Analyzing trace with hash 617463883, now seen corresponding path program 1 times
[2023-04-02 16:59:08,364 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 16:59:08,364 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089727975]
[2023-04-02 16:59:08,365 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 16:59:08,365 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 16:59:08,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 16:59:09,585 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 16:59:09,585 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 16:59:09,585 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089727975]
[2023-04-02 16:59:09,586 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089727975] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-02 16:59:09,586 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-02 16:59:09,586 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-02 16:59:09,586 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635552487]
[2023-04-02 16:59:09,586 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-02 16:59:09,587 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-02 16:59:09,587 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-02 16:59:09,588 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-02 16:59:09,588 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-02 16:59:09,588 INFO  L87              Difference]: Start difference. First operand 3103 states and 5359 transitions. Second operand  has 5 states, 5 states have (on average 155.8) internal successors, (779), 4 states have internal predecessors, (779), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-02 16:59:12,811 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-02 16:59:12,811 INFO  L93              Difference]: Finished difference Result 9457 states and 16538 transitions.
[2023-04-02 16:59:12,812 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-02 16:59:12,812 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 155.8) internal successors, (779), 4 states have internal predecessors, (779), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 788
[2023-04-02 16:59:12,813 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-02 16:59:12,840 INFO  L225             Difference]: With dead ends: 9457
[2023-04-02 16:59:12,840 INFO  L226             Difference]: Without dead ends: 6359
[2023-04-02 16:59:12,847 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
[2023-04-02 16:59:12,849 INFO  L413           NwaCegarLoop]: 49 mSDtfsCounter, 2366 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4818 mSolverCounterSat, 1394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2366 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 6212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1394 IncrementalHoareTripleChecker+Valid, 4818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time
[2023-04-02 16:59:12,850 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2366 Valid, 123 Invalid, 6212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1394 Valid, 4818 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time]
[2023-04-02 16:59:12,855 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6359 states.
[2023-04-02 16:59:13,011 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6359 to 6332.
[2023-04-02 16:59:13,018 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6332 states, 6215 states have (on average 1.6886564762670957) internal successors, (10495), 6229 states have internal predecessors, (10495), 34 states have call successors, (34), 34 states have call predecessors, (34), 82 states have return successors, (365), 68 states have call predecessors, (365), 33 states have call successors, (365)
[2023-04-02 16:59:13,034 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6332 states to 6332 states and 10894 transitions.
[2023-04-02 16:59:13,034 INFO  L78                 Accepts]: Start accepts. Automaton has 6332 states and 10894 transitions. Word has length 788
[2023-04-02 16:59:13,034 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-02 16:59:13,034 INFO  L495      AbstractCegarLoop]: Abstraction has 6332 states and 10894 transitions.
[2023-04-02 16:59:13,035 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 155.8) internal successors, (779), 4 states have internal predecessors, (779), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-02 16:59:13,035 INFO  L276                IsEmpty]: Start isEmpty. Operand 6332 states and 10894 transitions.
[2023-04-02 16:59:13,047 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 796
[2023-04-02 16:59:13,047 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-02 16:59:13,048 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2023-04-02 16:59:13,048 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-02 16:59:13,048 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-02 16:59:13,048 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-02 16:59:13,049 INFO  L85        PathProgramCache]: Analyzing trace with hash -1194617077, now seen corresponding path program 1 times
[2023-04-02 16:59:13,049 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-02 16:59:13,049 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391933131]
[2023-04-02 16:59:13,049 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 16:59:13,049 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-02 16:59:13,129 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 16:59:13,755 INFO  L134       CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-02 16:59:13,755 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-02 16:59:13,755 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391933131]
[2023-04-02 16:59:13,755 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391933131] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-02 16:59:13,755 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372942013]
[2023-04-02 16:59:13,756 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-02 16:59:13,756 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-02 16:59:13,756 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-02 16:59:13,757 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)
[2023-04-02 16:59:13,759 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-04-02 16:59:14,008 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-02 16:59:14,012 INFO  L262         TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-02 16:59:14,021 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-02 16:59:14,074 INFO  L134       CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 16:59:14,074 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-02 16:59:14,147 INFO  L134       CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-02 16:59:14,147 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372942013] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-02 16:59:14,147 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33194934]
[2023-04-02 16:59:14,180 INFO  L159        IcfgInterpreter]: Started Sifa with 771 locations of interest
[2023-04-02 16:59:14,180 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-02 16:59:14,185 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-02 16:59:14,188 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-02 16:59:14,189 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-02 16:59:14,346 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs
[2023-04-02 16:59:25,180 WARN  L223               SmtUtils]: Spent 9.64s on a formula simplification that was a NOOP. DAG size: 1032 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)
[2023-04-02 17:00:13,961 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 18468 conjuctions. This might take some time...
[2023-04-02 17:00:32,242 INFO  L192   XnfTransformerHelper]: Simplified to disjunction of 18468 conjuctions.