/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ms2f.c
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-d623d84
[2020-07-20 11:46:51,765 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 11:46:51,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 11:46:51,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 11:46:51,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 11:46:51,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 11:46:51,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 11:46:51,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 11:46:51,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 11:46:51,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 11:46:51,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 11:46:51,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 11:46:51,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 11:46:51,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 11:46:51,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 11:46:51,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 11:46:51,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 11:46:51,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 11:46:51,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 11:46:51,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 11:46:51,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 11:46:51,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 11:46:51,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 11:46:51,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 11:46:51,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 11:46:51,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 11:46:51,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 11:46:51,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 11:46:51,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 11:46:51,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 11:46:51,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 11:46:51,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 11:46:51,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 11:46:51,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 11:46:51,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 11:46:51,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 11:46:51,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 11:46:51,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 11:46:51,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 11:46:51,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 11:46:51,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 11:46:51,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 11:46:51,870 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 11:46:51,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 11:46:51,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 11:46:51,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 11:46:51,872 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 11:46:51,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 11:46:51,873 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 11:46:51,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 11:46:51,873 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 11:46:51,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 11:46:51,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 11:46:51,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 11:46:51,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 11:46:51,874 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 11:46:51,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 11:46:51,874 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 11:46:51,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 11:46:51,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 11:46:51,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 11:46:51,875 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 11:46:51,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 11:46:51,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 11:46:51,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 11:46:51,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 11:46:51,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 11:46:51,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 11:46:51,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:46:51,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 11:46:51,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 11:46:51,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY
[2020-07-20 11:46:52,188 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 11:46:52,203 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 11:46:52,207 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 11:46:52,208 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 11:46:52,209 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 11:46:52,209 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms2f.c
[2020-07-20 11:46:52,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43941b1e4/73177c5e8b844e3890ac0a71988e6443/FLAG854d65a93
[2020-07-20 11:46:52,733 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 11:46:52,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms2f.c
[2020-07-20 11:46:52,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43941b1e4/73177c5e8b844e3890ac0a71988e6443/FLAG854d65a93
[2020-07-20 11:46:53,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43941b1e4/73177c5e8b844e3890ac0a71988e6443
[2020-07-20 11:46:53,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 11:46:53,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 11:46:53,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 11:46:53,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 11:46:53,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 11:46:53,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:46:53" (1/1) ...
[2020-07-20 11:46:53,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b80807d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:53, skipping insertion in model container
[2020-07-20 11:46:53,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:46:53" (1/1) ...
[2020-07-20 11:46:53,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 11:46:53,164 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 11:46:53,353 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 11:46:53,361 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 11:46:53,379 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 11:46:53,393 INFO L208 MainTranslator]: Completed translation
[2020-07-20 11:46:53,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:53 WrapperNode
[2020-07-20 11:46:53,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 11:46:53,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 11:46:53,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 11:46:53,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 11:46:53,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:53" (1/1) ...
[2020-07-20 11:46:53,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:53" (1/1) ...
[2020-07-20 11:46:53,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:53" (1/1) ...
[2020-07-20 11:46:53,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:53" (1/1) ...
[2020-07-20 11:46:53,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:53" (1/1) ...
[2020-07-20 11:46:53,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:53" (1/1) ...
[2020-07-20 11:46:53,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:53" (1/1) ...
[2020-07-20 11:46:53,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 11:46:53,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 11:46:53,519 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 11:46:53,519 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 11:46:53,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:53" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 11:46:53,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 11:46:53,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 11:46:53,591 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 11:46:53,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 11:46:53,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 11:46:53,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 11:46:53,591 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 11:46:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 11:46:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 11:46:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 11:46:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure malloc
[2020-07-20 11:46:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 11:46:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 11:46:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-07-20 11:46:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 11:46:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 11:46:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 11:46:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 11:46:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 11:46:53,885 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 11:46:53,886 INFO L295 CfgBuilder]: Removed 2 assume(true) statements.
[2020-07-20 11:46:53,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:46:53 BoogieIcfgContainer
[2020-07-20 11:46:53,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 11:46:53,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 11:46:53,891 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 11:46:53,894 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 11:46:53,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:46:53" (1/3) ...
[2020-07-20 11:46:53,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c5ce22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:46:53, skipping insertion in model container
[2020-07-20 11:46:53,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:53" (2/3) ...
[2020-07-20 11:46:53,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c5ce22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:46:53, skipping insertion in model container
[2020-07-20 11:46:53,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:46:53" (3/3) ...
[2020-07-20 11:46:53,897 INFO L109 eAbstractionObserver]: Analyzing ICFG ms2f.c
[2020-07-20 11:46:53,908 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 11:46:53,914 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 11:46:53,928 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 11:46:53,950 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 11:46:53,950 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 11:46:53,950 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 11:46:53,950 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 11:46:53,950 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 11:46:53,950 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 11:46:53,951 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 11:46:53,951 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 11:46:53,968 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states.
[2020-07-20 11:46:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 11:46:53,973 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:46:53,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:46:53,975 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:46:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:46:53,980 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times
[2020-07-20 11:46:53,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:46:53,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935540669]
[2020-07-20 11:46:53,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:46:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:46:54,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 11:46:54,090 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:46:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 11:46:54,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:46:54,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935540669]
[2020-07-20 11:46:54,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:46:54,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 11:46:54,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267350573]
[2020-07-20 11:46:54,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 11:46:54,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:46:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 11:46:54,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 11:46:54,138 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states.
[2020-07-20 11:46:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:46:54,163 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions.
[2020-07-20 11:46:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2020-07-20 11:46:54,164 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21
[2020-07-20 11:46:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:46:54,173 INFO L225 Difference]: With dead ends: 54
[2020-07-20 11:46:54,174 INFO L226 Difference]: Without dead ends: 25
[2020-07-20 11:46:54,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 11:46:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2020-07-20 11:46:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2020-07-20 11:46:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2020-07-20 11:46:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions.
[2020-07-20 11:46:54,218 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21
[2020-07-20 11:46:54,219 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:46:54,219 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions.
[2020-07-20 11:46:54,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 11:46:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions.
[2020-07-20 11:46:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 11:46:54,221 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:46:54,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 11:46:54,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:46:54,435 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:46:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:46:54,436 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times
[2020-07-20 11:46:54,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:46:54,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856705267]
[2020-07-20 11:46:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:46:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 11:46:54,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 11:46:54,502 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 11:46:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 11:46:54,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 11:46:54,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856705267]
[2020-07-20 11:46:54,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 11:46:54,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 11:46:54,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350058953]
[2020-07-20 11:46:54,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 11:46:54,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 11:46:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 11:46:54,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-20 11:46:54,563 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states.
[2020-07-20 11:46:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 11:46:54,633 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions.
[2020-07-20 11:46:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-07-20 11:46:54,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21
[2020-07-20 11:46:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 11:46:54,636 INFO L225 Difference]: With dead ends: 40
[2020-07-20 11:46:54,636 INFO L226 Difference]: Without dead ends: 30
[2020-07-20 11:46:54,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-20 11:46:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-07-20 11:46:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27.
[2020-07-20 11:46:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2020-07-20 11:46:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions.
[2020-07-20 11:46:54,645 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21
[2020-07-20 11:46:54,645 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 11:46:54,645 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions.
[2020-07-20 11:46:54,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 11:46:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions.
[2020-07-20 11:46:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-07-20 11:46:54,647 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 11:46:54,647 INFO L422 BasicCegarLoop]: 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]
[2020-07-20 11:46:54,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:46:54,853 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 11:46:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 11:46:54,854 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times
[2020-07-20 11:46:54,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 11:46:54,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065502243]
[2020-07-20 11:46:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:46:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 11:46:54,897 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 11:46:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 11:46:54,913 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 11:46:54,936 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 11:46:54,936 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 11:46:55,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 11:46:55,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:46:55 BoogieIcfgContainer
[2020-07-20 11:46:55,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 11:46:55,191 INFO L168 Benchmark]: Toolchain (without parser) took 2059.60 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 103.7 MB in the beginning and 108.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 52.3 MB. Max. memory is 7.1 GB.
[2020-07-20 11:46:55,192 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 146.3 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-20 11:46:55,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.58 ms. Allocated memory is still 146.3 MB. Free memory was 103.3 MB in the beginning and 93.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
[2020-07-20 11:46:55,194 INFO L168 Benchmark]: Boogie Preprocessor took 123.42 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 93.0 MB in the beginning and 180.3 MB in the end (delta: -87.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB.
[2020-07-20 11:46:55,195 INFO L168 Benchmark]: RCFGBuilder took 371.11 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 163.9 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB.
[2020-07-20 11:46:55,196 INFO L168 Benchmark]: TraceAbstraction took 1298.13 ms. Allocated memory is still 202.9 MB. Free memory was 163.3 MB in the beginning and 108.0 MB in the end (delta: 55.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB.
[2020-07-20 11:46:55,200 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.17 ms. Allocated memory is still 146.3 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 261.58 ms. Allocated memory is still 146.3 MB. Free memory was 103.3 MB in the beginning and 93.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 123.42 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 93.0 MB in the beginning and 180.3 MB in the end (delta: -87.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 371.11 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 163.9 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 1298.13 ms. Allocated memory is still 202.9 MB. Free memory was 163.3 MB in the beginning and 108.0 MB in the end (delta: 55.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L17] int N;
VAL [\old(N)=3, N=0]
[L21] N = __VERIFIER_nondet_int()
[L22] COND FALSE !(N <= 0)
VAL [\old(N)=0, N=1]
[L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int))
VAL [\old(cond)=1, \old(N)=0, N=1]
[L11] COND FALSE !(!cond)
VAL [\old(cond)=1, \old(N)=0, cond=1, N=1]
[L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int))
VAL [\old(N)=0, N=1]
[L25] int i;
[L26] int sum[1];
[L27] int *a = malloc(sizeof(int)*N);
[L29] i=0
VAL [\old(N)=0, a={7720:0}, i=0, malloc(sizeof(int)*N)={7720:0}, N=1, sum={7722:0}]
[L29] COND TRUE i<N
[L31] a[i] = i%2
VAL [\old(N)=0, a={7720:0}, i=0, malloc(sizeof(int)*N)={7720:0}, N=1, sum={7722:0}]
[L29] i++
VAL [\old(N)=0, a={7720:0}, i=1, malloc(sizeof(int)*N)={7720:0}, N=1, sum={7722:0}]
[L29] COND FALSE !(i<N)
VAL [\old(N)=0, a={7720:0}, i=1, malloc(sizeof(int)*N)={7720:0}, N=1, sum={7722:0}]
[L34] i=0
VAL [\old(N)=0, a={7720:0}, i=0, malloc(sizeof(int)*N)={7720:0}, N=1, sum={7722:0}]
[L34] COND TRUE i<N
VAL [\old(N)=0, a={7720:0}, i=0, malloc(sizeof(int)*N)={7720:0}, N=1, sum={7722:0}]
[L36] COND TRUE i==0
[L37] sum[0] = 0
VAL [\old(N)=0, a={7720:0}, i=0, malloc(sizeof(int)*N)={7720:0}, N=1, sum={7722:0}]
[L34] i++
VAL [\old(N)=0, a={7720:0}, i=1, malloc(sizeof(int)*N)={7720:0}, N=1, sum={7722:0}]
[L34] COND FALSE !(i<N)
VAL [\old(N)=0, a={7720:0}, i=1, malloc(sizeof(int)*N)={7720:0}, N=1, sum={7722:0}]
[L42] EXPR sum[0]
VAL [\old(N)=0, a={7720:0}, i=1, malloc(sizeof(int)*N)={7720:0}, N=1, sum={7722:0}, sum[0]=0]
[L42] CALL __VERIFIER_assert(sum[0] > N)
VAL [\old(cond)=0, \old(N)=0, N=1]
[L13] COND TRUE !(cond)
VAL [\old(cond)=0, \old(N)=0, cond=0, N=1]
[L13] __VERIFIER_error()
VAL [\old(cond)=0, \old(N)=0, cond=0, N=1]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 17 SDslu, 15 SDs, 0 SdLazy, 24 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 1160 SizeOfPredicates, 2 NumberOfNonLiveVariables, 174 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...