/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/Problem18_label58.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:32:47,694 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 10:32:47,696 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-04-01 10:32:47,718 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-04-01 10:32:47,719 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 10:32:47,719 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 10:32:47,720 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 10:32:47,726 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-04-01 10:32:47,727 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-04-01 10:32:47,731 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 10:32:47,732 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-04-01 10:32:47,733 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-04-01 10:32:47,733 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-04-01 10:32:47,735 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-04-01 10:32:47,736 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-01 10:32:47,738 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 10:32:47,738 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 10:32:47,739 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 10:32:47,741 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-04-01 10:32:47,745 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-04-01 10:32:47,746 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-04-01 10:32:47,746 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-04-01 10:32:47,747 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-04-01 10:32:47,748 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-04-01 10:32:47,754 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-04-01 10:32:47,755 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-04-01 10:32:47,755 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-04-01 10:32:47,756 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-04-01 10:32:47,756 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-04-01 10:32:47,756 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-04-01 10:32:47,757 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-04-01 10:32:47,757 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-04-01 10:32:47,758 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-04-01 10:32:47,759 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-04-01 10:32:47,759 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-04-01 10:32:47,760 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2023-04-01 10:32:47,760 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2023-04-01 10:32:47,760 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2023-04-01 10:32:47,760 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-04-01 10:32:47,761 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-04-01 10:32:47,761 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:32:47,762 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 10:32:47,789 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:32:47,789 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:32:47,790 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:32:47,790 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:32:47,790 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:32:47,790 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:32:47,791 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:32:47,791 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:32:47,791 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:32:47,791 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:32:47,791 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:32:47,792 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:32:47,792 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:32:47,792 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:32:47,792 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:32:47,792 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:32:47,792 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:32:47,792 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:32:47,793 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:32:47,793 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:32:47,793 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:32:47,793 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:32:47,793 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:32:47,793 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:32:47,793 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:32:47,793 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:32:47,794 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:32:47,794 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:32:47,794 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:32:47,794 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:32:47,794 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:32:47,794 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:32:47,794 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:32:47,794 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:32:47,794 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:32:47,794 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:32:47,795 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:32:47,795 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:32:47,795 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:32:47,795 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:32:47,795 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:32:47,795 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:32:48,001 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:32:48,025 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:32:48,027 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:32:48,028 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:32:48,028 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:32:48,029 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label58.c
[2023-04-01 10:32:49,112 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:32:49,437 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:32:49,438 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label58.c
[2023-04-01 10:32:49,454 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb3bdaad/f052e98fe4844410be7548cf972a2eec/FLAG6ecbe1b13
[2023-04-01 10:32:49,467 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bb3bdaad/f052e98fe4844410be7548cf972a2eec
[2023-04-01 10:32:49,469 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:32:49,470 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:32:49,472 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:32:49,472 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:32:49,474 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:32:49,475 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:32:49" (1/1) ...
[2023-04-01 10:32:49,476 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@324cf7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:49, skipping insertion in model container
[2023-04-01 10:32:49,476 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:32:49" (1/1) ...
[2023-04-01 10:32:49,480 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:32:49,556 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:32:49,742 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label58.c[4356,4369]
[2023-04-01 10:32:50,234 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:32:50,242 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:32:50,262 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label58.c[4356,4369]
[2023-04-01 10:32:50,460 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:32:50,474 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:32:50,475 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:50 WrapperNode
[2023-04-01 10:32:50,475 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:32:50,475 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:32:50,476 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:32:50,476 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:32:50,483 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:50" (1/1) ...
[2023-04-01 10:32:50,483 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:50" (1/1) ...
[2023-04-01 10:32:50,517 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:50" (1/1) ...
[2023-04-01 10:32:50,517 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:50" (1/1) ...
[2023-04-01 10:32:50,610 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:50" (1/1) ...
[2023-04-01 10:32:50,630 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:50" (1/1) ...
[2023-04-01 10:32:50,643 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:50" (1/1) ...
[2023-04-01 10:32:50,652 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:50" (1/1) ...
[2023-04-01 10:32:50,665 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:32:50,666 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:32:50,666 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:32:50,666 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:32:50,667 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:50" (1/1) ...
[2023-04-01 10:32:50,672 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:32:50,679 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:32:50,689 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 10:32:50,729 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 10:32:50,741 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:32:50,741 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:32:50,741 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:32:50,742 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:32:50,742 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:32:50,742 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2023-04-01 10:32:50,742 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:32:50,742 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:32:50,742 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:32:50,742 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2023-04-01 10:32:50,742 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:32:50,742 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:32:50,742 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:32:50,742 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:32:50,742 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:32:50,742 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:32:50,742 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:32:50,742 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:32:50,743 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:32:50,743 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:32:50,743 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:32:50,743 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:32:50,743 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:32:50,808 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:32:50,809 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:32:52,970 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:32:59,162 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:32:59,162 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:32:59,165 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:32:59 BoogieIcfgContainer
[2023-04-01 10:32:59,165 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:32:59,167 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:32:59,167 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:32:59,169 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:32:59,169 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:32:49" (1/3) ...
[2023-04-01 10:32:59,170 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5da3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:32:59, skipping insertion in model container
[2023-04-01 10:32:59,170 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:32:50" (2/3) ...
[2023-04-01 10:32:59,170 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5da3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:32:59, skipping insertion in model container
[2023-04-01 10:32:59,170 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:32:59" (3/3) ...
[2023-04-01 10:32:59,172 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem18_label58.c
[2023-04-01 10:32:59,186 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:32:59,186 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:32:59,225 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:32:59,229 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;@7adaa6fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:32:59,230 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:32:59,234 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2023-04-01 10:32:59,239 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:32:59,239 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:32:59,239 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:32:59,240 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:32:59,243 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:32:59,244 INFO  L85        PathProgramCache]: Analyzing trace with hash 314231811, now seen corresponding path program 1 times
[2023-04-01 10:32:59,250 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:32:59,250 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860875025]
[2023-04-01 10:32:59,251 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:32:59,251 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:32:59,325 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:32:59,506 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 10:32:59,507 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:32:59,507 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860875025]
[2023-04-01 10:32:59,507 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860875025] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:32:59,508 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:32:59,508 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:32:59,509 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092273013]
[2023-04-01 10:32:59,509 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:32:59,512 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:32:59,512 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:32:59,537 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:32:59,538 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:32:59,540 INFO  L87              Difference]: Start difference. First operand  has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 10:33:01,058 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:33:01,058 INFO  L93              Difference]: Finished difference Result 1393 states and 2727 transitions.
[2023-04-01 10:33:01,059 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:33:01,060 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 10:33:01,060 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:33:01,078 INFO  L225             Difference]: With dead ends: 1393
[2023-04-01 10:33:01,078 INFO  L226             Difference]: Without dead ends: 921
[2023-04-01 10:33:01,092 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 10:33:01,095 INFO  L413           NwaCegarLoop]: 346 mSDtfsCounter, 472 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time
[2023-04-01 10:33:01,096 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 366 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time]
[2023-04-01 10:33:01,113 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 921 states.
[2023-04-01 10:33:01,154 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919.
[2023-04-01 10:33:01,163 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 919 states, 905 states have (on average 1.6209944751381216) internal successors, (1467), 905 states have internal predecessors, (1467), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10)
[2023-04-01 10:33:01,166 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1484 transitions.
[2023-04-01 10:33:01,167 INFO  L78                 Accepts]: Start accepts. Automaton has 919 states and 1484 transitions. Word has length 11
[2023-04-01 10:33:01,168 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:33:01,168 INFO  L495      AbstractCegarLoop]: Abstraction has 919 states and 1484 transitions.
[2023-04-01 10:33:01,168 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 10:33:01,168 INFO  L276                IsEmpty]: Start isEmpty. Operand 919 states and 1484 transitions.
[2023-04-01 10:33:01,169 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2023-04-01 10:33:01,169 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:33:01,169 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:33:01,169 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:33:01,169 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:33:01,170 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:33:01,170 INFO  L85        PathProgramCache]: Analyzing trace with hash 1229483206, now seen corresponding path program 1 times
[2023-04-01 10:33:01,170 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:33:01,170 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201330231]
[2023-04-01 10:33:01,170 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:33:01,170 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:33:01,191 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:33:01,371 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 10:33:01,371 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:33:01,371 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201330231]
[2023-04-01 10:33:01,371 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201330231] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:33:01,372 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:33:01,372 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:33:01,372 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813527050]
[2023-04-01 10:33:01,372 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:33:01,373 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:33:01,373 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:33:01,373 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:33:01,373 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:33:01,374 INFO  L87              Difference]: Start difference. First operand 919 states and 1484 transitions. Second operand  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 10:33:04,400 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:33:04,400 INFO  L93              Difference]: Finished difference Result 2795 states and 4544 transitions.
[2023-04-01 10:33:04,405 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-04-01 10:33:04,406 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22
[2023-04-01 10:33:04,406 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:33:04,413 INFO  L225             Difference]: With dead ends: 2795
[2023-04-01 10:33:04,413 INFO  L226             Difference]: Without dead ends: 1881
[2023-04-01 10:33:04,418 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 10:33:04,423 INFO  L413           NwaCegarLoop]: 35 mSDtfsCounter, 1521 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3160 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 3160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time
[2023-04-01 10:33:04,426 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1521 Valid, 93 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 3160 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time]
[2023-04-01 10:33:04,427 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1881 states.
[2023-04-01 10:33:04,471 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1843.
[2023-04-01 10:33:04,473 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1843 states, 1809 states have (on average 1.4145936981757876) internal successors, (2559), 1816 states have internal predecessors, (2559), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (54), 15 states have call predecessors, (54), 10 states have call successors, (54)
[2023-04-01 10:33:04,478 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2624 transitions.
[2023-04-01 10:33:04,478 INFO  L78                 Accepts]: Start accepts. Automaton has 1843 states and 2624 transitions. Word has length 22
[2023-04-01 10:33:04,478 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:33:04,479 INFO  L495      AbstractCegarLoop]: Abstraction has 1843 states and 2624 transitions.
[2023-04-01 10:33:04,479 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 10:33:04,479 INFO  L276                IsEmpty]: Start isEmpty. Operand 1843 states and 2624 transitions.
[2023-04-01 10:33:04,479 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2023-04-01 10:33:04,480 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:33:04,480 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:33:04,480 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:33:04,480 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:33:04,480 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:33:04,481 INFO  L85        PathProgramCache]: Analyzing trace with hash 814308296, now seen corresponding path program 1 times
[2023-04-01 10:33:04,481 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:33:04,481 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179784897]
[2023-04-01 10:33:04,481 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:33:04,481 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:33:04,495 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:33:04,600 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-04-01 10:33:04,601 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:33:04,601 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179784897]
[2023-04-01 10:33:04,601 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179784897] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:33:04,601 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612115216]
[2023-04-01 10:33:04,601 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:33:04,601 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:33:04,601 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:33:04,604 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 10:33:04,605 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 10:33:04,691 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:33:04,694 INFO  L262         TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-04-01 10:33:04,698 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:33:04,746 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 10:33:04,746 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-01 10:33:04,746 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612115216] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:33:04,746 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-01 10:33:04,746 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-04-01 10:33:04,747 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524758570]
[2023-04-01 10:33:04,747 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:33:04,747 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:33:04,747 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:33:04,747 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:33:04,748 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-04-01 10:33:04,748 INFO  L87              Difference]: Start difference. First operand 1843 states and 2624 transitions. Second operand  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:33:06,935 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:33:06,935 INFO  L93              Difference]: Finished difference Result 5615 states and 8140 transitions.
[2023-04-01 10:33:06,935 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:33:06,936 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32
[2023-04-01 10:33:06,936 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:33:06,945 INFO  L225             Difference]: With dead ends: 5615
[2023-04-01 10:33:06,946 INFO  L226             Difference]: Without dead ends: 3777
[2023-04-01 10:33:06,949 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2023-04-01 10:33:06,951 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 1572 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time
[2023-04-01 10:33:06,952 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 59 Invalid, 3460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time]
[2023-04-01 10:33:06,955 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3777 states.
[2023-04-01 10:33:07,009 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3658.
[2023-04-01 10:33:07,013 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3658 states, 3573 states have (on average 1.2549678141617688) internal successors, (4484), 3601 states have internal predecessors, (4484), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 37 states have call predecessors, (195), 18 states have call successors, (195)
[2023-04-01 10:33:07,022 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4698 transitions.
[2023-04-01 10:33:07,023 INFO  L78                 Accepts]: Start accepts. Automaton has 3658 states and 4698 transitions. Word has length 32
[2023-04-01 10:33:07,023 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:33:07,023 INFO  L495      AbstractCegarLoop]: Abstraction has 3658 states and 4698 transitions.
[2023-04-01 10:33:07,023 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:33:07,023 INFO  L276                IsEmpty]: Start isEmpty. Operand 3658 states and 4698 transitions.
[2023-04-01 10:33:07,030 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 89
[2023-04-01 10:33:07,030 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:33:07,031 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:33:07,039 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-04-01 10:33:07,235 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:33:07,236 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:33:07,237 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:33:07,237 INFO  L85        PathProgramCache]: Analyzing trace with hash -41850540, now seen corresponding path program 1 times
[2023-04-01 10:33:07,237 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:33:07,237 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112882913]
[2023-04-01 10:33:07,237 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:33:07,238 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:33:07,274 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:33:07,378 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 10:33:07,378 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:33:07,378 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112882913]
[2023-04-01 10:33:07,378 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112882913] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:33:07,378 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973529511]
[2023-04-01 10:33:07,378 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:33:07,378 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:33:07,379 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:33:07,380 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-04-01 10:33:07,382 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-04-01 10:33:07,460 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:33:07,461 INFO  L262         TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:33:07,463 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:33:07,494 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 10:33:07,495 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:33:07,553 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 10:33:07,554 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973529511] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:33:07,554 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447443516]
[2023-04-01 10:33:07,587 INFO  L159        IcfgInterpreter]: Started Sifa with 70 locations of interest
[2023-04-01 10:33:07,588 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:33:07,591 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:33:07,596 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:33:07,597 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:33:07,785 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs
[2023-04-01 10:33:07,920 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 34
[2023-04-01 10:33:11,718 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 27
[2023-04-01 10:33:25,622 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 404670 conjuctions. This might take some time...