/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.i
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This is Ultimate 0.1.25-d623d84
[2020-07-20 17:56:32,769 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 17:56:32,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 17:56:32,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 17:56:32,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 17:56:32,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 17:56:32,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 17:56:32,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 17:56:32,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 17:56:32,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 17:56:32,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 17:56:32,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 17:56:32,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 17:56:32,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 17:56:32,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 17:56:32,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 17:56:32,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 17:56:32,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 17:56:32,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 17:56:32,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 17:56:32,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 17:56:32,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 17:56:32,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 17:56:32,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 17:56:32,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 17:56:32,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 17:56:32,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 17:56:32,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 17:56:32,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 17:56:32,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 17:56:32,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 17:56:32,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 17:56:32,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 17:56:32,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 17:56:32,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 17:56:32,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 17:56:32,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 17:56:32,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 17:56:32,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 17:56:32,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 17:56:32,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 17:56:32,832 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 17:56:32,857 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 17:56:32,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 17:56:32,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 17:56:32,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 17:56:32,860 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 17:56:32,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 17:56:32,860 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 17:56:32,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 17:56:32,861 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 17:56:32,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 17:56:32,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 17:56:32,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 17:56:32,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 17:56:32,862 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 17:56:32,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 17:56:32,862 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 17:56:32,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 17:56:32,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 17:56:32,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 17:56:32,865 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 17:56:32,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 17:56:32,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 17:56:32,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 17:56:32,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 17:56:32,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 17:56:32,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 17:56:32,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:56:32,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 17:56:32,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 17:56:32,867 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 -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 17:56:33,223 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 17:56:33,238 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 17:56:33,242 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 17:56:33,244 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 17:56:33,244 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 17:56:33,245 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i
[2020-07-20 17:56:33,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e515ad5/7c74720411164537bc3ef2cb0289fa30/FLAG0c6131e83
[2020-07-20 17:56:33,935 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 17:56:33,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.i
[2020-07-20 17:56:33,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e515ad5/7c74720411164537bc3ef2cb0289fa30/FLAG0c6131e83
[2020-07-20 17:56:34,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e515ad5/7c74720411164537bc3ef2cb0289fa30
[2020-07-20 17:56:34,287 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 17:56:34,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 17:56:34,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 17:56:34,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 17:56:34,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 17:56:34,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d02878e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34, skipping insertion in model container
[2020-07-20 17:56:34,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 17:56:34,344 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 17:56:34,561 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:56:34,567 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 17:56:34,588 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:56:34,607 INFO L208 MainTranslator]: Completed translation
[2020-07-20 17:56:34,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34 WrapperNode
[2020-07-20 17:56:34,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 17:56:34,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 17:56:34,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 17:56:34,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 17:56:34,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 17:56:34,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 17:56:34,644 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 17:56:34,644 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 17:56:34,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (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 17:56:34,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 17:56:34,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 17:56:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 17:56:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 17:56:34,778 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 17:56:34,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 17:56:34,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 17:56:34,778 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 17:56:34,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 17:56:34,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 17:56:34,779 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 17:56:34,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 17:56:34,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 17:56:34,957 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 17:56:34,957 INFO L295 CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 17:56:34,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:34 BoogieIcfgContainer
[2020-07-20 17:56:34,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 17:56:34,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 17:56:34,963 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 17:56:34,966 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 17:56:34,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:56:34" (1/3) ...
[2020-07-20 17:56:34,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7352ff74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:34, skipping insertion in model container
[2020-07-20 17:56:34,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (2/3) ...
[2020-07-20 17:56:34,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7352ff74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:34, skipping insertion in model container
[2020-07-20 17:56:34,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:34" (3/3) ...
[2020-07-20 17:56:34,969 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i
[2020-07-20 17:56:34,980 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 17:56:34,987 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 17:56:35,010 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 17:56:35,063 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 17:56:35,063 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 17:56:35,063 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 17:56:35,065 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 17:56:35,066 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 17:56:35,066 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 17:56:35,067 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 17:56:35,067 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 17:56:35,097 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states.
[2020-07-20 17:56:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-07-20 17:56:35,110 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 17:56:35,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:56:35,112 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:56:35,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:56:35,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times
[2020-07-20 17:56:35,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:56:35,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131471306]
[2020-07-20 17:56:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
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 17:56:35,260 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 17:56:35,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:56:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 17:56:35,276 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:56:35,328 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 17:56:35,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:56:35,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131471306]
[2020-07-20 17:56:35,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:56:35,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:56:35,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879993354]
[2020-07-20 17:56:35,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:56:35,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:56:35,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:56:35,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:56:35,356 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states.
[2020-07-20 17:56:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:56:35,399 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions.
[2020-07-20 17:56:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-20 17:56:35,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11
[2020-07-20 17:56:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:56:35,412 INFO L225 Difference]: With dead ends: 34
[2020-07-20 17:56:35,413 INFO L226 Difference]: Without dead ends: 13
[2020-07-20 17:56:35,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:56:35,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2020-07-20 17:56:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2020-07-20 17:56:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states.
[2020-07-20 17:56:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions.
[2020-07-20 17:56:35,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11
[2020-07-20 17:56:35,473 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:56:35,474 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions.
[2020-07-20 17:56:35,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:56:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions.
[2020-07-20 17:56:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-07-20 17:56:35,478 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 17:56:35,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:56:35,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:56:35,695 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:56:35,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:56:35,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times
[2020-07-20 17:56:35,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:56:35,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379546361]
[2020-07-20 17:56:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
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 17:56:35,733 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:56:35,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:56:35,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 17:56:35,737 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:56:35,793 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 17:56:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:56:35,840 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:56:35,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 17:56:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 17:56:35,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379546361]
[2020-07-20 17:56:35,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:56:35,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10
[2020-07-20 17:56:35,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56387831]
[2020-07-20 17:56:35,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-07-20 17:56:35,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:56:35,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-07-20 17:56:35,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2020-07-20 17:56:35,967 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states.
[2020-07-20 17:56:36,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:56:36,068 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions.
[2020-07-20 17:56:36,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-07-20 17:56:36,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12
[2020-07-20 17:56:36,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:56:36,069 INFO L225 Difference]: With dead ends: 15
[2020-07-20 17:56:36,069 INFO L226 Difference]: Without dead ends: 0
[2020-07-20 17:56:36,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132
[2020-07-20 17:56:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 17:56:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 17:56:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 17:56:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 17:56:36,073 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12
[2020-07-20 17:56:36,074 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:56:36,074 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 17:56:36,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-07-20 17:56:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 17:56:36,074 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 17:56:36,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:56:36,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 17:56:36,396 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2020-07-20 17:56:36,397 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 17:56:36,397 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 17:56:36,397 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-07-20 17:56:36,397 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-07-20 17:56:36,398 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-07-20 17:56:36,398 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed.
[2020-07-20 17:56:36,398 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed.
[2020-07-20 17:56:36,398 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed.
[2020-07-20 17:56:36,398 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed.
[2020-07-20 17:56:36,399 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 24) the Hoare annotation is: true
[2020-07-20 17:56:36,399 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 24) no Hoare annotation was computed.
[2020-07-20 17:56:36,399 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed.
[2020-07-20 17:56:36,399 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed.
[2020-07-20 17:56:36,399 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (or (< 0 main_~y~0) (< main_~x~0 0))
[2020-07-20 17:56:36,400 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 21) the Hoare annotation is: (< 0 main_~y~0)
[2020-07-20 17:56:36,400 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 24) no Hoare annotation was computed.
[2020-07-20 17:56:36,400 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true
[2020-07-20 17:56:36,400 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed.
[2020-07-20 17:56:36,400 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed.
[2020-07-20 17:56:36,401 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed.
[2020-07-20 17:56:36,401 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed.
[2020-07-20 17:56:36,401 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed.
[2020-07-20 17:56:36,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:56:36 BoogieIcfgContainer
[2020-07-20 17:56:36,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 17:56:36,429 INFO L168 Benchmark]: Toolchain (without parser) took 2138.92 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 102.6 MB in the beginning and 112.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,431 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.68 ms. Allocated memory is still 137.4 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,433 INFO L168 Benchmark]: Boogie Preprocessor took 34.58 ms. Allocated memory is still 137.4 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,434 INFO L168 Benchmark]: RCFGBuilder took 317.33 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.4 MB in the beginning and 167.6 MB in the end (delta: -76.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,435 INFO L168 Benchmark]: TraceAbstraction took 1463.04 ms. Allocated memory is still 200.3 MB. Free memory was 166.9 MB in the beginning and 112.0 MB in the end (delta: 54.9 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,440 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 316.68 ms. Allocated memory is still 137.4 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 34.58 ms. Allocated memory is still 137.4 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 317.33 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.4 MB in the beginning and 167.6 MB in the end (delta: -76.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 1463.04 ms. Allocated memory is still 200.3 MB. Free memory was 166.9 MB in the beginning and 112.0 MB in the end (delta: 54.9 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable
For all program executions holds that call of __VERIFIER_error() unreachable at this location
- AllSpecificationsHoldResult: All specifications hold
1 specifications checked. All of them hold
- InvariantResult [Line: 18]: Loop Invariant
Derived loop invariant: 0 < y || x < 0
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 6 SDslu, 43 SDs, 0 SdLazy, 32 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 13 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 20 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 23 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 796 SizeOfPredicates, 5 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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 correct!
Received shutdown request...