/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-simple/nested_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:49:18,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:49:18,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:49:18,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:49:18,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:49:18,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:49:18,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:49:18,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:49:18,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:49:18,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:49:18,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:49:18,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:49:18,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:49:18,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:49:18,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:49:18,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:49:18,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:49:18,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:49:18,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:49:18,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:49:18,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:49:18,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:49:18,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:49:18,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:49:18,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:49:18,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:49:18,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:49:18,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:49:18,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:49:18,243 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:49:18,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:49:18,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:49:18,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:49:18,249 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:49:18,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:49:18,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:49:18,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:49:18,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:49:18,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:49:18,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:49:18,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:49:18,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:49:18,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:49:18,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:49:18,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:49:18,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:49:18,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:49:18,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:49:18,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:49:18,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:49:18,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:49:18,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:49:18,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:49:18,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:49:18,255 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:49:18,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:49:18,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:49:18,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:49:18,677 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:49:18,678 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:49:18,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_1.c [2020-12-22 04:49:18,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d5ac6d43/40342041acfe4b43ac774752792023e5/FLAG5c52f9c05 [2020-12-22 04:49:19,337 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:49:19,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_1.c [2020-12-22 04:49:19,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d5ac6d43/40342041acfe4b43ac774752792023e5/FLAG5c52f9c05 [2020-12-22 04:49:19,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d5ac6d43/40342041acfe4b43ac774752792023e5 [2020-12-22 04:49:19,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:49:19,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:49:19,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:49:19,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:49:19,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:49:19,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:19" (1/1) ... [2020-12-22 04:49:19,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c00a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:19, skipping insertion in model container [2020-12-22 04:49:19,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:19" (1/1) ... [2020-12-22 04:49:19,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:49:19,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:49:20,039 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_1.c[676,689] [2020-12-22 04:49:20,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:49:20,056 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:49:20,071 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_1.c[676,689] [2020-12-22 04:49:20,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:49:20,089 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:49:20,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20 WrapperNode [2020-12-22 04:49:20,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:49:20,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:49:20,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:49:20,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:49:20,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20" (1/1) ... [2020-12-22 04:49:20,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20" (1/1) ... [2020-12-22 04:49:20,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:49:20,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:49:20,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:49:20,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:49:20,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20" (1/1) ... [2020-12-22 04:49:20,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20" (1/1) ... [2020-12-22 04:49:20,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20" (1/1) ... [2020-12-22 04:49:20,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20" (1/1) ... [2020-12-22 04:49:20,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20" (1/1) ... [2020-12-22 04:49:20,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20" (1/1) ... [2020-12-22 04:49:20,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20" (1/1) ... [2020-12-22 04:49:20,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:49:20,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:49:20,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:49:20,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:49:20,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20" (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 [2020-12-22 04:49:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:49:20,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:49:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:49:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:49:20,493 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:49:20,493 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-22 04:49:20,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:20 BoogieIcfgContainer [2020-12-22 04:49:20,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:49:20,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:49:20,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:49:20,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:49:20,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:49:19" (1/3) ... [2020-12-22 04:49:20,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45892191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:20, skipping insertion in model container [2020-12-22 04:49:20,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:20" (2/3) ... [2020-12-22 04:49:20,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45892191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:20, skipping insertion in model container [2020-12-22 04:49:20,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:20" (3/3) ... [2020-12-22 04:49:20,505 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1.c [2020-12-22 04:49:20,513 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:49:20,518 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:49:20,538 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:49:20,568 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:49:20,569 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:49:20,569 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:49:20,569 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:49:20,569 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:49:20,570 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:49:20,570 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:49:20,570 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:49:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-22 04:49:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 04:49:20,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:20,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 04:49:20,592 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:20,600 INFO L82 PathProgramCache]: Analyzing trace with hash 28696998, now seen corresponding path program 1 times [2020-12-22 04:49:20,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:20,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979519558] [2020-12-22 04:49:20,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:20,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979519558] [2020-12-22 04:49:20,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:20,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:20,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48919525] [2020-12-22 04:49:20,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:20,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:20,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:20,960 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-22 04:49:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:21,027 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-22 04:49:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:21,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-22 04:49:21,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:21,042 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:49:21,042 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 04:49:21,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 04:49:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2020-12-22 04:49:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:49:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-22 04:49:21,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2020-12-22 04:49:21,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:21,084 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-22 04:49:21,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:21,085 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-22 04:49:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:49:21,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:21,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:21,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:49:21,087 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:21,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:21,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1809669604, now seen corresponding path program 1 times [2020-12-22 04:49:21,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:21,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186566064] [2020-12-22 04:49:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:21,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186566064] [2020-12-22 04:49:21,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838790217] [2020-12-22 04:49:21,204 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 [2020-12-22 04:49:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:21,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:49:21,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:21,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:21,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:49:21,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523394149] [2020-12-22 04:49:21,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:49:21,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:21,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:49:21,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:21,351 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-22 04:49:21,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:21,386 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-22 04:49:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:49:21,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 04:49:21,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:21,388 INFO L225 Difference]: With dead ends: 14 [2020-12-22 04:49:21,388 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:49:21,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:49:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-12-22 04:49:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:49:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 04:49:21,392 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2020-12-22 04:49:21,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:21,392 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 04:49:21,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:49:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 04:49:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:49:21,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:21,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:21,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:49:21,607 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash -367607134, now seen corresponding path program 2 times [2020-12-22 04:49:21,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:21,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486191649] [2020-12-22 04:49:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:49:21,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486191649] [2020-12-22 04:49:21,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:21,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 04:49:21,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711629720] [2020-12-22 04:49:21,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:49:21,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:21,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:49:21,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:21,686 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 5 states. [2020-12-22 04:49:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:21,698 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2020-12-22 04:49:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:49:21,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 04:49:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:21,699 INFO L225 Difference]: With dead ends: 10 [2020-12-22 04:49:21,700 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 04:49:21,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:21,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 04:49:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 04:49:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 04:49:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 04:49:21,701 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-12-22 04:49:21,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:21,702 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 04:49:21,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:49:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 04:49:21,702 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 04:49:21,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:49:21,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 04:49:21,725 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 04:49:21,725 INFO L192 CegarLoopUtils]: At program point L25(lines 15 26) the Hoare annotation is: true [2020-12-22 04:49:21,725 INFO L189 CegarLoopUtils]: For program point L23(line 23) no Hoare annotation was computed. [2020-12-22 04:49:21,725 INFO L189 CegarLoopUtils]: For program point L19-2(lines 19 21) no Hoare annotation was computed. [2020-12-22 04:49:21,726 INFO L185 CegarLoopUtils]: At program point L19-3(lines 19 21) the Hoare annotation is: (<= ULTIMATE.start_main_~a~0 6) [2020-12-22 04:49:21,726 INFO L189 CegarLoopUtils]: For program point L19-4(lines 15 26) no Hoare annotation was computed. [2020-12-22 04:49:21,726 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 04:49:21,726 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 04:49:21,726 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 04:49:21,726 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 23) no Hoare annotation was computed. [2020-12-22 04:49:21,726 INFO L189 CegarLoopUtils]: For program point L22-1(lines 22 24) no Hoare annotation was computed. [2020-12-22 04:49:21,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:49:21 BoogieIcfgContainer [2020-12-22 04:49:21,741 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:49:21,742 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:49:21,742 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:49:21,742 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:49:21,743 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:20" (3/4) ... [2020-12-22 04:49:21,746 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 04:49:21,756 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-22 04:49:21,757 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 04:49:21,757 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:49:21,757 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:49:21,792 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-simple/nested_1.c-witness.graphml [2020-12-22 04:49:21,792 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:49:21,794 INFO L168 Benchmark]: Toolchain (without parser) took 2014.64 ms. Allocated memory is still 158.3 MB. Free memory was 132.4 MB in the beginning and 102.7 MB in the end (delta: 29.7 MB). Peak memory consumption was 29.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:21,795 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 158.3 MB. Free memory is still 128.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:49:21,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.78 ms. Allocated memory is still 158.3 MB. Free memory was 132.2 MB in the beginning and 123.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:21,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.48 ms. Allocated memory is still 158.3 MB. Free memory was 123.0 MB in the beginning and 121.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:21,797 INFO L168 Benchmark]: Boogie Preprocessor took 31.97 ms. Allocated memory is still 158.3 MB. Free memory was 121.7 MB in the beginning and 120.8 MB in the end (delta: 903.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:21,798 INFO L168 Benchmark]: RCFGBuilder took 324.26 ms. Allocated memory is still 158.3 MB. Free memory was 120.7 MB in the beginning and 110.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:21,798 INFO L168 Benchmark]: TraceAbstraction took 1244.21 ms. Allocated memory is still 158.3 MB. Free memory was 109.7 MB in the beginning and 104.8 MB in the end (delta: 4.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:21,799 INFO L168 Benchmark]: Witness Printer took 50.15 ms. Allocated memory is still 158.3 MB. Free memory was 104.8 MB in the beginning and 102.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:49:21,803 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 158.3 MB. Free memory is still 128.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 307.78 ms. Allocated memory is still 158.3 MB. Free memory was 132.2 MB in the beginning and 123.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.48 ms. Allocated memory is still 158.3 MB. Free memory was 123.0 MB in the beginning and 121.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.97 ms. Allocated memory is still 158.3 MB. Free memory was 121.7 MB in the beginning and 120.8 MB in the end (delta: 903.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 324.26 ms. Allocated memory is still 158.3 MB. Free memory was 120.7 MB in the beginning and 110.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1244.21 ms. Allocated memory is still 158.3 MB. Free memory was 109.7 MB in the beginning and 104.8 MB in the end (delta: 4.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. * Witness Printer took 50.15 ms. Allocated memory is still 158.3 MB. Free memory was 104.8 MB in the beginning and 102.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 23]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: a <= 6 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 6 SDslu, 11 SDs, 0 SdLazy, 27 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 5 NumberOfFragments, 4 HoareAnnotationTreeSize, 2 FomulaSimplifications, 7 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 312 SizeOfPredicates, 0 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 4/6 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...