java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 22:59:07,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 22:59:07,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 22:59:07,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 22:59:07,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 22:59:07,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 22:59:07,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 22:59:07,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 22:59:07,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 22:59:07,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 22:59:07,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 22:59:07,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 22:59:07,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 22:59:07,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 22:59:07,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 22:59:07,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 22:59:07,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 22:59:07,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 22:59:07,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 22:59:07,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 22:59:07,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 22:59:07,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 22:59:07,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 22:59:07,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 22:59:07,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 22:59:07,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 22:59:07,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 22:59:07,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 22:59:07,806 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 [2019-10-13 22:59:07,820 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 22:59:07,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 22:59:07,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 22:59:07,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 22:59:07,822 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 22:59:07,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 22:59:07,822 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 22:59:07,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 22:59:07,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 22:59:07,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 22:59:07,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 22:59:07,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 22:59:07,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 22:59:07,824 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 22:59:07,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 22:59:07,824 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 22:59:07,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 22:59:07,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 22:59:07,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 22:59:07,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 22:59:07,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 22:59:07,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 22:59:07,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 22:59:07,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 22:59:07,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 22:59:07,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 22:59:07,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 22:59:07,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 22:59:07,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 22:59:08,112 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 22:59:08,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 22:59:08,129 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 22:59:08,130 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 22:59:08,131 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 22:59:08,131 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2019-10-13 22:59:08,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324f466f3/8001c04043f74e0e9797e53b60a60a14/FLAGb26770eee [2019-10-13 22:59:08,622 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 22:59:08,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2019-10-13 22:59:08,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324f466f3/8001c04043f74e0e9797e53b60a60a14/FLAGb26770eee [2019-10-13 22:59:09,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324f466f3/8001c04043f74e0e9797e53b60a60a14 [2019-10-13 22:59:09,044 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 22:59:09,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 22:59:09,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 22:59:09,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 22:59:09,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 22:59:09,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:09" (1/1) ... [2019-10-13 22:59:09,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6487c26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:09, skipping insertion in model container [2019-10-13 22:59:09,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:09" (1/1) ... [2019-10-13 22:59:09,062 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 22:59:09,079 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 22:59:09,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:59:09,307 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 22:59:09,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:59:09,347 INFO L192 MainTranslator]: Completed translation [2019-10-13 22:59:09,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:09 WrapperNode [2019-10-13 22:59:09,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 22:59:09,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 22:59:09,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 22:59:09,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 22:59:09,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:09" (1/1) ... [2019-10-13 22:59:09,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:09" (1/1) ... [2019-10-13 22:59:09,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:09" (1/1) ... [2019-10-13 22:59:09,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:09" (1/1) ... [2019-10-13 22:59:09,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:09" (1/1) ... [2019-10-13 22:59:09,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:09" (1/1) ... [2019-10-13 22:59:09,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:09" (1/1) ... [2019-10-13 22:59:09,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 22:59:09,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 22:59:09,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 22:59:09,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 22:59:09,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:09" (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 [2019-10-13 22:59:09,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 22:59:09,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 22:59:09,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 22:59:09,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 22:59:09,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 22:59:09,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 22:59:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 22:59:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 22:59:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 22:59:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 22:59:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 22:59:09,714 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 22:59:09,714 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 22:59:09,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:09 BoogieIcfgContainer [2019-10-13 22:59:09,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 22:59:09,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 22:59:09,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 22:59:09,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 22:59:09,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:59:09" (1/3) ... [2019-10-13 22:59:09,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7c7356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:09, skipping insertion in model container [2019-10-13 22:59:09,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:09" (2/3) ... [2019-10-13 22:59:09,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7c7356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:09, skipping insertion in model container [2019-10-13 22:59:09,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:09" (3/3) ... [2019-10-13 22:59:09,724 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2019-10-13 22:59:09,734 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 22:59:09,741 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 22:59:09,759 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 22:59:09,791 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 22:59:09,792 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 22:59:09,792 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 22:59:09,792 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 22:59:09,793 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 22:59:09,793 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 22:59:09,793 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 22:59:09,793 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 22:59:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-13 22:59:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 22:59:09,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:09,834 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:09,836 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:09,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1985007014, now seen corresponding path program 1 times [2019-10-13 22:59:09,863 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:09,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737022822] [2019-10-13 22:59:09,864 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:09,864 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:09,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:10,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737022822] [2019-10-13 22:59:10,067 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:59:10,067 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 22:59:10,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885790609] [2019-10-13 22:59:10,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 22:59:10,072 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:10,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 22:59:10,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:59:10,090 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2019-10-13 22:59:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:59:10,173 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-10-13 22:59:10,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 22:59:10,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-13 22:59:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:59:10,184 INFO L225 Difference]: With dead ends: 38 [2019-10-13 22:59:10,184 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 22:59:10,188 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 22:59:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 22:59:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-13 22:59:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 22:59:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-13 22:59:10,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2019-10-13 22:59:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:59:10,233 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-13 22:59:10,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 22:59:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-13 22:59:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 22:59:10,237 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:10,237 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:10,238 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:10,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1314726279, now seen corresponding path program 1 times [2019-10-13 22:59:10,240 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:10,241 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506843995] [2019-10-13 22:59:10,241 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:10,241 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:10,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:10,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506843995] [2019-10-13 22:59:10,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330416256] [2019-10-13 22:59:10,381 INFO L94 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 [2019-10-13 22:59:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:10,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 22:59:10,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:59:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:10,533 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:59:10,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:10,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1198620372] [2019-10-13 22:59:10,623 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-13 22:59:10,623 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 22:59:10,630 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 22:59:10,637 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 22:59:10,638 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 22:59:10,691 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-13 22:59:11,011 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2019-10-13 22:59:11,040 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-13 22:59:11,046 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 22:59:11,046 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 22:59:11,047 INFO L193 IcfgInterpreter]: Reachable states at location L14-3 satisfy 77#(and (<= 0 main_~m~0) (<= main_~n~0 2147483647) (<= 0 (+ main_~n~0 2147483648)) (not (< main_~x~0 main_~n~0)) (<= 0 main_~x~0)) [2019-10-13 22:59:11,047 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-13 22:59:11,047 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-13 22:59:11,048 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 106#true [2019-10-13 22:59:11,048 INFO L193 IcfgInterpreter]: Reachable states at location L14-2 satisfy 72#(and (<= 0 main_~m~0) (<= main_~n~0 2147483647) (<= 0 (+ main_~n~0 2147483648)) (<= 0 main_~x~0)) [2019-10-13 22:59:11,048 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 22:59:11,049 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 101#true [2019-10-13 22:59:11,049 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 97#false [2019-10-13 22:59:11,050 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 92#false [2019-10-13 22:59:11,050 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 82#(and (= |__VERIFIER_assert_#in~cond| 1) (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 22:59:11,050 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 87#(and (= |__VERIFIER_assert_#in~cond| 1) (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 22:59:11,147 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 22:59:11,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6] total 13 [2019-10-13 22:59:11,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564095747] [2019-10-13 22:59:11,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 22:59:11,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:11,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 22:59:11,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-10-13 22:59:11,151 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2019-10-13 22:59:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:59:11,204 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2019-10-13 22:59:11,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 22:59:11,205 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-13 22:59:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:59:11,208 INFO L225 Difference]: With dead ends: 26 [2019-10-13 22:59:11,208 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 22:59:11,209 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-10-13 22:59:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 22:59:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2019-10-13 22:59:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 22:59:11,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-13 22:59:11,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2019-10-13 22:59:11,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:59:11,215 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-13 22:59:11,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 22:59:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-13 22:59:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 22:59:11,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:11,216 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:11,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:59:11,428 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:11,429 INFO L82 PathProgramCache]: Analyzing trace with hash 723289379, now seen corresponding path program 1 times [2019-10-13 22:59:11,429 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:11,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246341990] [2019-10-13 22:59:11,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:11,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:11,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:11,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246341990] [2019-10-13 22:59:11,486 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:59:11,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 22:59:11,487 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724204999] [2019-10-13 22:59:11,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 22:59:11,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:11,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 22:59:11,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 22:59:11,488 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2019-10-13 22:59:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:59:11,555 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-13 22:59:11,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 22:59:11,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-10-13 22:59:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:59:11,557 INFO L225 Difference]: With dead ends: 27 [2019-10-13 22:59:11,557 INFO L226 Difference]: Without dead ends: 17 [2019-10-13 22:59:11,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 22:59:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-13 22:59:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-13 22:59:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-13 22:59:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-13 22:59:11,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-10-13 22:59:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:59:11,562 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-13 22:59:11,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 22:59:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-13 22:59:11,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 22:59:11,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:11,564 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:11,564 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:11,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1183148956, now seen corresponding path program 1 times [2019-10-13 22:59:11,564 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:11,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101539579] [2019-10-13 22:59:11,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:11,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:11,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:11,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101539579] [2019-10-13 22:59:11,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046863670] [2019-10-13 22:59:11,630 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:59:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:11,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 22:59:11,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:59:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:11,736 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:59:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:11,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591154365] [2019-10-13 22:59:11,845 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-13 22:59:11,846 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 22:59:11,846 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 22:59:11,847 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 22:59:11,847 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 22:59:11,864 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-13 22:59:12,057 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2019-10-13 22:59:12,113 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-13 22:59:12,118 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 22:59:12,118 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 22:59:12,119 INFO L193 IcfgInterpreter]: Reachable states at location L14-3 satisfy 80#(and (<= 0 main_~m~0) (<= main_~n~0 2147483647) (<= 0 (+ main_~n~0 2147483648)) (not (< main_~x~0 main_~n~0)) (<= 0 main_~x~0)) [2019-10-13 22:59:12,119 INFO L193 IcfgInterpreter]: Reachable states at location L4-2 satisfy 133#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 22:59:12,120 INFO L193 IcfgInterpreter]: Reachable states at location L14-2 satisfy 75#(and (<= 0 main_~m~0) (<= main_~n~0 2147483647) (<= 0 (+ main_~n~0 2147483648)) (<= 0 main_~x~0)) [2019-10-13 22:59:12,120 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 142#true [2019-10-13 22:59:12,120 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertEXIT satisfy 138#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 22:59:12,121 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 128#(and (<= __VERIFIER_assert_~cond 0) (<= |__VERIFIER_assert_#in~cond| 0) (or (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 22:59:12,121 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 118#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (or (and (<= __VERIFIER_assert_~cond 0) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1)))) [2019-10-13 22:59:12,122 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-13 22:59:12,122 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-13 22:59:12,122 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 147#true [2019-10-13 22:59:12,123 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 22:59:12,123 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 123#(and (<= __VERIFIER_assert_~cond 0) (<= |__VERIFIER_assert_#in~cond| 0) (or (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 22:59:12,123 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 113#(and (or (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)))) [2019-10-13 22:59:12,123 INFO L193 IcfgInterpreter]: Reachable states at location L20 satisfy 99#(and (<= 0 main_~m~0) (<= main_~n~0 2147483647) (<= 0 (+ main_~n~0 2147483648)) (not (< main_~x~0 main_~n~0)) (<= 0 main_~x~0)) [2019-10-13 22:59:12,331 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 22:59:12,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6, 7] total 20 [2019-10-13 22:59:12,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753184769] [2019-10-13 22:59:12,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 22:59:12,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:12,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 22:59:12,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2019-10-13 22:59:12,336 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 20 states. [2019-10-13 22:59:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:59:12,594 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-13 22:59:12,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 22:59:12,594 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 16 [2019-10-13 22:59:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:59:12,595 INFO L225 Difference]: With dead ends: 20 [2019-10-13 22:59:12,595 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 22:59:12,596 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2019-10-13 22:59:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 22:59:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 22:59:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 22:59:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 22:59:12,597 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-10-13 22:59:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:59:12,597 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 22:59:12,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 22:59:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 22:59:12,598 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 22:59:12,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:59:12,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 22:59:13,016 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-13 22:59:13,016 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 22:59:13,016 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 22:59:13,016 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-13 22:59:13,017 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 22:59:13,017 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 22:59:13,017 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 23) the Hoare annotation is: true [2019-10-13 22:59:13,017 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 23) no Hoare annotation was computed. [2019-10-13 22:59:13,017 INFO L443 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2019-10-13 22:59:13,018 INFO L439 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= 0 (+ main_~n~0 2147483648))) (.cse2 (<= main_~n~0 main_~x~0))) (or (and .cse0 .cse1 (<= main_~x~0 0) .cse2 (<= 0 main_~x~0)) (and (<= main_~n~0 2147483647) .cse0 (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)) .cse1 .cse2 (< main_~m~0 (+ main_~x~0 1))))) [2019-10-13 22:59:13,018 INFO L439 ceAbstractionStarter]: At program point L14-2(lines 14 19) the Hoare annotation is: (and (<= main_~n~0 2147483647) (<= 0 main_~m~0) (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)) (<= 0 (+ main_~n~0 2147483648)) (< main_~m~0 (+ main_~x~0 1))) [2019-10-13 22:59:13,019 INFO L439 ceAbstractionStarter]: At program point L14-3(lines 14 19) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= 0 (+ main_~n~0 2147483648))) (.cse2 (<= main_~n~0 main_~x~0))) (or (and .cse0 .cse1 .cse2 (<= main_~x~0 0) (<= 0 main_~x~0)) (and (<= main_~n~0 2147483647) .cse0 (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)) .cse1 .cse2 (< main_~m~0 (+ main_~x~0 1))))) [2019-10-13 22:59:13,026 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-13 22:59:13,026 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-13 22:59:13,026 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-13 22:59:13,027 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-13 22:59:13,027 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-13 22:59:13,027 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-13 22:59:13,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:59:13 BoogieIcfgContainer [2019-10-13 22:59:13,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 22:59:13,067 INFO L168 Benchmark]: Toolchain (without parser) took 4020.07 ms. Allocated memory was 137.9 MB in the beginning and 245.4 MB in the end (delta: 107.5 MB). Free memory was 102.9 MB in the beginning and 171.1 MB in the end (delta: -68.2 MB). Peak memory consumption was 39.2 MB. Max. memory is 7.1 GB. [2019-10-13 22:59:13,068 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 22:59:13,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.02 ms. Allocated memory is still 137.9 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-10-13 22:59:13,074 INFO L168 Benchmark]: Boogie Preprocessor took 102.68 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 179.6 MB in the end (delta: -86.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-10-13 22:59:13,075 INFO L168 Benchmark]: RCFGBuilder took 264.56 ms. Allocated memory is still 201.3 MB. Free memory was 179.6 MB in the beginning and 165.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-10-13 22:59:13,078 INFO L168 Benchmark]: TraceAbstraction took 3347.08 ms. Allocated memory was 201.3 MB in the beginning and 245.4 MB in the end (delta: 44.0 MB). Free memory was 165.7 MB in the beginning and 171.1 MB in the end (delta: -5.5 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2019-10-13 22:59:13,087 INFO L335 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 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.02 ms. Allocated memory is still 137.9 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.68 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 179.6 MB in the end (delta: -86.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 264.56 ms. Allocated memory is still 201.3 MB. Free memory was 179.6 MB in the beginning and 165.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3347.08 ms. Allocated memory was 201.3 MB in the beginning and 245.4 MB in the end (delta: 44.0 MB). Free memory was 165.7 MB in the beginning and 171.1 MB in the end (delta: -5.5 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 14]: Loop Invariant Derived loop invariant: (((n <= 2147483647 && 0 <= m) && (n <= 0 || m < n)) && 0 <= n + 2147483648) && m < x + 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Result: SAFE, OverallTime: 3.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 47 SDtfs, 37 SDslu, 170 SDs, 0 SdLazy, 126 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=1, 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, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 21 NumberOfFragments, 121 HoareAnnotationTreeSize, 14 FomulaSimplifications, 227 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 139 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 3392 SizeOfPredicates, 9 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 7/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 707, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES: 51, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 25, TOOLS_POST_TIME[ms]: 69, TOOLS_POST_CALL_APPLICATIONS: 13, TOOLS_POST_CALL_TIME[ms]: 37, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME[ms]: 8, TOOLS_QUANTIFIERELIM_APPLICATIONS: 44, TOOLS_QUANTIFIERELIM_TIME[ms]: 95, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 19, FLUID_QUERY_TIME[ms]: 12, FLUID_QUERIES: 57, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 43, DOMAIN_JOIN_TIME[ms]: 353, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME[ms]: 109, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME[ms]: 19, DOMAIN_ISBOTTOM_APPLICATIONS: 4, DOMAIN_ISBOTTOM_TIME[ms]: 5, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 340, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 340, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME[ms]: 17, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 16, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 5, PATH_EXPR_TIME[ms]: 5, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 20, DAG_COMPRESSION_PROCESSED_NODES: 138, DAG_COMPRESSION_RETAINED_NODES: 88, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...