./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/simple_3-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/simple_3-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 567ad22bceea9f434c69cd01babdc4ad1d30ddf7 ................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:58:24,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:58:24,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:58:24,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:58:24,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:58:24,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:58:24,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:58:24,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:58:24,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:58:24,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:58:24,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:58:24,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:58:24,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:58:24,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:58:24,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:58:24,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:58:24,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:58:24,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:58:24,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:58:24,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:58:24,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:58:24,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:58:24,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:58:24,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:58:24,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:58:24,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:58:24,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:58:24,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:58:24,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:58:24,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:58:24,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:58:24,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:58:24,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:58:24,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:58:24,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:58:24,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:58:24,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:58:24,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:58:24,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:58:24,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:58:24,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:58:24,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:58:24,766 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:58:24,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:58:24,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:58:24,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:58:24,768 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:58:24,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:58:24,769 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:58:24,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:58:24,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:58:24,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:58:24,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:58:24,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:58:24,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:58:24,770 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:58:24,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:58:24,771 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:58:24,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:58:24,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:58:24,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:58:24,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:58:24,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:58:24,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:58:24,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:58:24,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:58:24,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:58:24,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:58:24,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:58:24,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:58:24,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:58:24,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 567ad22bceea9f434c69cd01babdc4ad1d30ddf7 [2020-10-20 00:58:24,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:58:24,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:58:24,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:58:24,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:58:24,991 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:58:24,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_3-2.c [2020-10-20 00:58:25,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60764f44c/d126e3c4b98a480a924c445a4a3fbe1b/FLAG3e1044da2 [2020-10-20 00:58:25,459 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:58:25,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_3-2.c [2020-10-20 00:58:25,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60764f44c/d126e3c4b98a480a924c445a4a3fbe1b/FLAG3e1044da2 [2020-10-20 00:58:25,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60764f44c/d126e3c4b98a480a924c445a4a3fbe1b [2020-10-20 00:58:25,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:58:25,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:58:25,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:58:25,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:58:25,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:58:25,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:58:25" (1/1) ... [2020-10-20 00:58:25,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ec381c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:25, skipping insertion in model container [2020-10-20 00:58:25,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:58:25" (1/1) ... [2020-10-20 00:58:25,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:58:25,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:58:26,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:58:26,152 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:58:26,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:58:26,183 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:58:26,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26 WrapperNode [2020-10-20 00:58:26,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:58:26,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:58:26,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:58:26,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:58:26,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26" (1/1) ... [2020-10-20 00:58:26,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26" (1/1) ... [2020-10-20 00:58:26,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:58:26,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:58:26,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:58:26,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:58:26,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26" (1/1) ... [2020-10-20 00:58:26,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26" (1/1) ... [2020-10-20 00:58:26,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26" (1/1) ... [2020-10-20 00:58:26,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26" (1/1) ... [2020-10-20 00:58:26,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26" (1/1) ... [2020-10-20 00:58:26,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26" (1/1) ... [2020-10-20 00:58:26,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26" (1/1) ... [2020-10-20 00:58:26,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:58:26,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:58:26,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:58:26,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:58:26,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26" (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 [2020-10-20 00:58:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:58:26,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:58:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:58:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:58:26,485 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:58:26,485 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 00:58:26,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:58:26 BoogieIcfgContainer [2020-10-20 00:58:26,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:58:26,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:58:26,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:58:26,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:58:26,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:58:25" (1/3) ... [2020-10-20 00:58:26,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f935ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:58:26, skipping insertion in model container [2020-10-20 00:58:26,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:58:26" (2/3) ... [2020-10-20 00:58:26,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f935ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:58:26, skipping insertion in model container [2020-10-20 00:58:26,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:58:26" (3/3) ... [2020-10-20 00:58:26,494 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_3-2.c [2020-10-20 00:58:26,506 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:58:26,512 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:58:26,523 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:58:26,541 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:58:26,542 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:58:26,542 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:58:26,542 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:58:26,542 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:58:26,542 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:58:26,542 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:58:26,543 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:58:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-10-20 00:58:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:58:26,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:58:26,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:58:26,561 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:58:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:58:26,566 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-10-20 00:58:26,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:58:26,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998185034] [2020-10-20 00:58:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:58:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:58:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:58:26,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998185034] [2020-10-20 00:58:26,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:58:26,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:58:26,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126545818] [2020-10-20 00:58:26,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:58:26,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:58:26,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:58:26,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:58:26,786 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-10-20 00:58:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:58:26,851 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-20 00:58:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:58:26,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-20 00:58:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:58:26,865 INFO L225 Difference]: With dead ends: 24 [2020-10-20 00:58:26,865 INFO L226 Difference]: Without dead ends: 8 [2020-10-20 00:58:26,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:58:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-20 00:58:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-20 00:58:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 00:58:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-10-20 00:58:26,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-10-20 00:58:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:58:26,911 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-10-20 00:58:26,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:58:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-10-20 00:58:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:58:26,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:58:26,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:58:26,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:58:26,913 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:58:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:58:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-10-20 00:58:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:58:26,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034112753] [2020-10-20 00:58:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:58:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:58:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:58:27,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034112753] [2020-10-20 00:58:27,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52338760] [2020-10-20 00:58:27,026 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:58:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:58:27,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:58:27,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:58:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:58:27,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:58:27,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-20 00:58:27,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623423] [2020-10-20 00:58:27,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:58:27,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:58:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:58:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:58:27,204 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2020-10-20 00:58:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:58:27,260 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-10-20 00:58:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:58:27,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2020-10-20 00:58:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:58:27,261 INFO L225 Difference]: With dead ends: 11 [2020-10-20 00:58:27,267 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:58:27,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:58:27,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:58:27,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:58:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:58:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:58:27,269 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2020-10-20 00:58:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:58:27,270 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:58:27,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:58:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:58:27,270 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:58:27,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-20 00:58:27,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:58:27,526 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:58:27,526 INFO L270 CegarLoopResult]: At program point L17-2(lines 17 19) the Hoare annotation is: (or (let ((.cse0 (div ULTIMATE.start_main_~x~0 2))) (and (< 0 .cse0) (<= ULTIMATE.start_main_~x~0 (* 2 .cse0)))) (= ULTIMATE.start_main_~x~0 0)) [2020-10-20 00:58:27,526 INFO L274 CegarLoopResult]: For program point L17-3(lines 17 19) no Hoare annotation was computed. [2020-10-20 00:58:27,526 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-20 00:58:27,527 INFO L270 CegarLoopResult]: At program point L7-2(lines 1 22) the Hoare annotation is: (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) [2020-10-20 00:58:27,527 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 00:58:27,527 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:58:27,527 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:58:27,527 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:58:27,527 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 00:58:27,528 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-20 00:58:27,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:58:27 BoogieIcfgContainer [2020-10-20 00:58:27,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:58:27,546 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:58:27,546 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:58:27,547 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:58:27,547 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:58:26" (3/4) ... [2020-10-20 00:58:27,551 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:58:27,562 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-20 00:58:27,562 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 00:58:27,562 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:58:27,562 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:58:27,604 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:58:27,604 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:58:27,610 INFO L168 Benchmark]: Toolchain (without parser) took 1756.35 ms. Allocated memory was 34.6 MB in the beginning and 46.7 MB in the end (delta: 12.1 MB). Free memory was 16.6 MB in the beginning and 21.4 MB in the end (delta: -4.8 MB). Peak memory consumption was 7.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:27,610 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 33.6 MB. Free memory was 10.8 MB in the beginning and 10.7 MB in the end (delta: 43.9 kB). Peak memory consumption was 43.9 kB. Max. memory is 14.3 GB. [2020-10-20 00:58:27,611 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.04 ms. Allocated memory was 34.6 MB in the beginning and 43.0 MB in the end (delta: 8.4 MB). Free memory was 15.7 MB in the beginning and 25.2 MB in the end (delta: -9.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:27,612 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.66 ms. Allocated memory is still 43.0 MB. Free memory was 25.0 MB in the beginning and 23.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:27,613 INFO L168 Benchmark]: Boogie Preprocessor took 19.07 ms. Allocated memory is still 43.0 MB. Free memory was 23.6 MB in the beginning and 22.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:27,614 INFO L168 Benchmark]: RCFGBuilder took 247.55 ms. Allocated memory was 43.0 MB in the beginning and 44.6 MB in the end (delta: 1.6 MB). Free memory was 22.2 MB in the beginning and 22.7 MB in the end (delta: -494.0 kB). Peak memory consumption was 11.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:27,615 INFO L168 Benchmark]: TraceAbstraction took 1058.29 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 22.2 MB in the beginning and 24.0 MB in the end (delta: -1.8 MB). Peak memory consumption was 330.3 kB. Max. memory is 14.3 GB. [2020-10-20 00:58:27,616 INFO L168 Benchmark]: Witness Printer took 57.87 ms. Allocated memory is still 46.7 MB. Free memory was 24.0 MB in the beginning and 21.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:58:27,621 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 33.6 MB. Free memory was 10.8 MB in the beginning and 10.7 MB in the end (delta: 43.9 kB). Peak memory consumption was 43.9 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 328.04 ms. Allocated memory was 34.6 MB in the beginning and 43.0 MB in the end (delta: 8.4 MB). Free memory was 15.7 MB in the beginning and 25.2 MB in the end (delta: -9.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 34.66 ms. Allocated memory is still 43.0 MB. Free memory was 25.0 MB in the beginning and 23.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 19.07 ms. Allocated memory is still 43.0 MB. Free memory was 23.6 MB in the beginning and 22.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 247.55 ms. Allocated memory was 43.0 MB in the beginning and 44.6 MB in the end (delta: 1.6 MB). Free memory was 22.2 MB in the beginning and 22.7 MB in the end (delta: -494.0 kB). Peak memory consumption was 11.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1058.29 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 22.2 MB in the beginning and 24.0 MB in the end (delta: -1.8 MB). Peak memory consumption was 330.3 kB. Max. memory is 14.3 GB. * Witness Printer took 57.87 ms. Allocated memory is still 46.7 MB. Free memory was 24.0 MB in the beginning and 21.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 17]: Loop Invariant Derived loop invariant: (0 < x / 2 && x <= 2 * (x / 2)) || x == 0 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: !(0 == cond) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 SDtfs, 11 SDslu, 16 SDs, 0 SdLazy, 30 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 21 HoareAnnotationTreeSize, 2 FomulaSimplifications, 9 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 354 SizeOfPredicates, 3 NumberOfNonLiveVariables, 46 ConjunctsInSsa, 7 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...