./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/while_infinite_loop_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/while_infinite_loop_2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 673762d41977d1832da2fc16ea042415bb97af40 ............................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 08:06:08,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:06:08,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:06:08,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:06:08,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:06:08,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:06:08,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:06:08,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:06:08,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:06:08,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:06:08,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:06:08,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:06:08,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:06:08,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:06:08,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:06:08,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:06:08,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:06:08,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:06:08,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:06:08,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:06:08,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:06:08,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:06:08,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:06:08,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:06:08,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:06:08,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:06:08,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:06:08,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:06:08,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:06:08,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:06:08,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:06:08,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:06:08,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:06:08,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:06:08,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:06:08,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:06:08,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:06:08,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:06:08,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:06:08,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:06:08,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:06:08,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 08:06:08,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:06:08,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:06:08,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:06:08,588 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:06:08,588 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:06:08,593 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:06:08,593 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:06:08,593 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:06:08,593 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:06:08,593 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:06:08,593 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:06:08,594 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:06:08,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:06:08,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:06:08,594 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:06:08,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:06:08,595 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:06:08,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:06:08,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:06:08,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:06:08,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:06:08,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:06:08,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:06:08,596 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:06:08,596 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:06:08,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:06:08,597 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:06:08,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:06:08,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:06:08,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:06:08,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:06:08,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:06:08,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:06:08,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:06:08,598 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:06:08,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:06:08,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:06:08,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:06:08,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:06:08,599 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 673762d41977d1832da2fc16ea042415bb97af40 [2020-12-09 08:06:08,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:06:08,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:06:08,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:06:08,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:06:08,782 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:06:08,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/../../sv-benchmarks/c/loops/while_infinite_loop_2.c [2020-12-09 08:06:08,822 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/data/2ea996c3c/b53176e2555145c18d1026667db10e10/FLAG5c7eca19a [2020-12-09 08:06:09,174 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:06:09,174 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/sv-benchmarks/c/loops/while_infinite_loop_2.c [2020-12-09 08:06:09,179 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/data/2ea996c3c/b53176e2555145c18d1026667db10e10/FLAG5c7eca19a [2020-12-09 08:06:09,603 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/data/2ea996c3c/b53176e2555145c18d1026667db10e10 [2020-12-09 08:06:09,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:06:09,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:06:09,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:06:09,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:06:09,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:06:09,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:06:09" (1/1) ... [2020-12-09 08:06:09,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680cc23b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09, skipping insertion in model container [2020-12-09 08:06:09,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:06:09" (1/1) ... [2020-12-09 08:06:09,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:06:09,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:06:09,732 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/sv-benchmarks/c/loops/while_infinite_loop_2.c[333,346] [2020-12-09 08:06:09,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:06:09,744 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:06:09,753 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/sv-benchmarks/c/loops/while_infinite_loop_2.c[333,346] [2020-12-09 08:06:09,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:06:09,764 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:06:09,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09 WrapperNode [2020-12-09 08:06:09,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:06:09,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:06:09,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:06:09,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:06:09,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09" (1/1) ... [2020-12-09 08:06:09,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09" (1/1) ... [2020-12-09 08:06:09,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:06:09,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:06:09,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:06:09,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:06:09,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09" (1/1) ... [2020-12-09 08:06:09,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09" (1/1) ... [2020-12-09 08:06:09,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09" (1/1) ... [2020-12-09 08:06:09,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09" (1/1) ... [2020-12-09 08:06:09,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09" (1/1) ... [2020-12-09 08:06:09,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09" (1/1) ... [2020-12-09 08:06:09,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09" (1/1) ... [2020-12-09 08:06:09,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:06:09,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:06:09,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:06:09,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:06:09,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/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 [2020-12-09 08:06:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:06:09,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:06:09,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 08:06:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:06:10,029 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:06:10,029 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 08:06:10,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:06:10 BoogieIcfgContainer [2020-12-09 08:06:10,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:06:10,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:06:10,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:06:10,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:06:10,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:06:09" (1/3) ... [2020-12-09 08:06:10,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150b7404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:06:10, skipping insertion in model container [2020-12-09 08:06:10,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:06:09" (2/3) ... [2020-12-09 08:06:10,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150b7404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:06:10, skipping insertion in model container [2020-12-09 08:06:10,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:06:10" (3/3) ... [2020-12-09 08:06:10,037 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_2.c [2020-12-09 08:06:10,048 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:06:10,050 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 08:06:10,058 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 08:06:10,076 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:06:10,076 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:06:10,076 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:06:10,076 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:06:10,076 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:06:10,077 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:06:10,077 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:06:10,077 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:06:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-09 08:06:10,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 08:06:10,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:06:10,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 08:06:10,090 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:06:10,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:06:10,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2126630, now seen corresponding path program 1 times [2020-12-09 08:06:10,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:06:10,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014727718] [2020-12-09 08:06:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:06:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:06:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:06:10,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014727718] [2020-12-09 08:06:10,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:06:10,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:06:10,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717465139] [2020-12-09 08:06:10,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 08:06:10,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:06:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 08:06:10,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:06:10,209 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 2 states. [2020-12-09 08:06:10,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:06:10,222 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2020-12-09 08:06:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 08:06:10,223 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 08:06:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:06:10,230 INFO L225 Difference]: With dead ends: 14 [2020-12-09 08:06:10,231 INFO L226 Difference]: Without dead ends: 5 [2020-12-09 08:06:10,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:06:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2020-12-09 08:06:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2020-12-09 08:06:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-12-09 08:06:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2020-12-09 08:06:10,260 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 4 [2020-12-09 08:06:10,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:06:10,261 INFO L481 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2020-12-09 08:06:10,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 08:06:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2020-12-09 08:06:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 08:06:10,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:06:10,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 08:06:10,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:06:10,262 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:06:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:06:10,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2096391, now seen corresponding path program 1 times [2020-12-09 08:06:10,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:06:10,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088337431] [2020-12-09 08:06:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:06:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:06:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:06:10,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088337431] [2020-12-09 08:06:10,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:06:10,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:06:10,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509998793] [2020-12-09 08:06:10,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:06:10,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:06:10,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:06:10,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:06:10,327 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2020-12-09 08:06:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:06:10,343 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2020-12-09 08:06:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:06:10,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 08:06:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:06:10,344 INFO L225 Difference]: With dead ends: 6 [2020-12-09 08:06:10,344 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 08:06:10,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:06:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 08:06:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 08:06:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 08:06:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 08:06:10,345 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2020-12-09 08:06:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:06:10,346 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 08:06:10,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:06:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 08:06:10,346 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 08:06:10,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 08:06:10,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 08:06:10,361 INFO L258 CegarLoopResult]: At program point L6-5(lines 1 20) the Hoare annotation is: false [2020-12-09 08:06:10,361 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 08:06:10,361 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-12-09 08:06:10,361 INFO L262 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-09 08:06:10,361 INFO L262 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-12-09 08:06:10,361 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 08:06:10,361 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-12-09 08:06:10,361 INFO L262 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-12-09 08:06:10,362 INFO L258 CegarLoopResult]: At program point L6-2(lines 5 17) the Hoare annotation is: (= ULTIMATE.start_main_~x~0 0) [2020-12-09 08:06:10,362 INFO L262 CegarLoopResult]: For program point L6-3(lines 6 8) no Hoare annotation was computed. [2020-12-09 08:06:10,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:06:10 BoogieIcfgContainer [2020-12-09 08:06:10,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:06:10,375 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:06:10,375 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:06:10,375 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:06:10,376 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:06:10" (3/4) ... [2020-12-09 08:06:10,378 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 08:06:10,386 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 08:06:10,386 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-09 08:06:10,386 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 08:06:10,386 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 08:06:10,411 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a8c08ff3-cb50-40a0-91d7-5ece00394039/bin/utaipan/witness.graphml [2020-12-09 08:06:10,411 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:06:10,412 INFO L168 Benchmark]: Toolchain (without parser) took 805.70 ms. Allocated memory is still 104.9 MB. Free memory was 84.3 MB in the beginning and 35.3 MB in the end (delta: 48.9 MB). Peak memory consumption was 48.3 MB. Max. memory is 16.1 GB. [2020-12-09 08:06:10,413 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory is still 41.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:06:10,413 INFO L168 Benchmark]: CACSL2BoogieTranslator took 157.53 ms. Allocated memory is still 104.9 MB. Free memory was 84.1 MB in the beginning and 77.7 MB in the end (delta: 6.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 08:06:10,414 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.09 ms. Allocated memory is still 104.9 MB. Free memory was 77.3 MB in the beginning and 76.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:06:10,414 INFO L168 Benchmark]: Boogie Preprocessor took 13.27 ms. Allocated memory is still 104.9 MB. Free memory was 76.0 MB in the beginning and 75.2 MB in the end (delta: 801.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:06:10,414 INFO L168 Benchmark]: RCFGBuilder took 228.97 ms. Allocated memory is still 104.9 MB. Free memory was 75.2 MB in the beginning and 62.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 08:06:10,415 INFO L168 Benchmark]: TraceAbstraction took 342.37 ms. Allocated memory is still 104.9 MB. Free memory was 61.7 MB in the beginning and 37.4 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:06:10,415 INFO L168 Benchmark]: Witness Printer took 36.34 ms. Allocated memory is still 104.9 MB. Free memory was 37.4 MB in the beginning and 35.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:06:10,418 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory is still 41.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 157.53 ms. Allocated memory is still 104.9 MB. Free memory was 84.1 MB in the beginning and 77.7 MB in the end (delta: 6.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.09 ms. Allocated memory is still 104.9 MB. Free memory was 77.3 MB in the beginning and 76.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.27 ms. Allocated memory is still 104.9 MB. Free memory was 76.0 MB in the beginning and 75.2 MB in the end (delta: 801.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 228.97 ms. Allocated memory is still 104.9 MB. Free memory was 75.2 MB in the beginning and 62.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 342.37 ms. Allocated memory is still 104.9 MB. Free memory was 61.7 MB in the beginning and 37.4 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 36.34 ms. Allocated memory is still 104.9 MB. Free memory was 37.4 MB in the beginning and 35.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 7]: 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 2 specifications checked. All of them hold - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 SDtfs, 3 SDslu, 1 SDs, 0 SdLazy, 3 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 4 HoareAnnotationTreeSize, 2 FomulaSimplifications, 9 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 33 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...