./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/gcd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/gcd01-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0497b69437c9ebb889888bdb31aaefcc8eaad029 ................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:56:45,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:56:45,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:56:45,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:56:45,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:56:45,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:56:45,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:56:45,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:56:45,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:56:45,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:56:45,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:56:45,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:56:45,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:56:45,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:56:45,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:56:45,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:56:45,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:56:45,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:56:45,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:56:45,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:56:45,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:56:45,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:56:45,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:56:45,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:56:45,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:56:45,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:56:45,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:56:45,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:56:45,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:56:45,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:56:45,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:56:45,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:56:45,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:56:45,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:56:45,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:56:45,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:56:45,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:56:45,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:56:45,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:56:45,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:56:45,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:56:45,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2019-10-22 08:56:45,423 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:56:45,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:56:45,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:56:45,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:56:45,424 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:56:45,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:56:45,425 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:56:45,425 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 08:56:45,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:56:45,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:56:45,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:56:45,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:56:45,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:56:45,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:56:45,426 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-10-22 08:56:45,427 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:56:45,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:56:45,427 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:56:45,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:56:45,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:56:45,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:56:45,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:56:45,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:56:45,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:56:45,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:56:45,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:56:45,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:56:45,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:56:45,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:56:45,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:56:45,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer 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 ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0497b69437c9ebb889888bdb31aaefcc8eaad029 [2019-10-22 08:56:45,456 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:56:45,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:56:45,474 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:56:45,476 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:56:45,476 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:56:45,477 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/../../sv-benchmarks/c/recursive/gcd01-1.c [2019-10-22 08:56:45,530 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/data/c9d69f37f/795afc84d3d44f53a64108b1a7834dae/FLAG4728b41aa [2019-10-22 08:56:45,916 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:56:45,917 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/sv-benchmarks/c/recursive/gcd01-1.c [2019-10-22 08:56:45,921 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/data/c9d69f37f/795afc84d3d44f53a64108b1a7834dae/FLAG4728b41aa [2019-10-22 08:56:46,317 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/data/c9d69f37f/795afc84d3d44f53a64108b1a7834dae [2019-10-22 08:56:46,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:56:46,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:56:46,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:46,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:56:46,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:56:46,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:46" (1/1) ... [2019-10-22 08:56:46,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3efb59ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46, skipping insertion in model container [2019-10-22 08:56:46,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:46" (1/1) ... [2019-10-22 08:56:46,336 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:56:46,351 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:56:46,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:46,473 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:56:46,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:46,554 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:56:46,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46 WrapperNode [2019-10-22 08:56:46,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:46,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:46,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:56:46,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:56:46,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46" (1/1) ... [2019-10-22 08:56:46,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46" (1/1) ... [2019-10-22 08:56:46,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:46,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:56:46,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:56:46,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:56:46,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46" (1/1) ... [2019-10-22 08:56:46,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46" (1/1) ... [2019-10-22 08:56:46,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46" (1/1) ... [2019-10-22 08:56:46,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46" (1/1) ... [2019-10-22 08:56:46,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46" (1/1) ... [2019-10-22 08:56:46,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46" (1/1) ... [2019-10-22 08:56:46,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46" (1/1) ... [2019-10-22 08:56:46,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:56:46,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:56:46,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:56:46,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:56:46,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/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 [2019-10-22 08:56:46,689 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2019-10-22 08:56:46,689 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2019-10-22 08:56:46,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:56:46,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:56:46,879 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:56:46,879 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:56:46,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:46 BoogieIcfgContainer [2019-10-22 08:56:46,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:56:46,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:56:46,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:56:46,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:56:46,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:56:46" (1/3) ... [2019-10-22 08:56:46,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcd7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:46, skipping insertion in model container [2019-10-22 08:56:46,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:46" (2/3) ... [2019-10-22 08:56:46,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcd7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:46, skipping insertion in model container [2019-10-22 08:56:46,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:46" (3/3) ... [2019-10-22 08:56:46,889 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2019-10-22 08:56:46,898 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:56:46,906 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-10-22 08:56:46,918 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-10-22 08:56:46,958 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:56:46,967 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:56:46,967 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:56:46,967 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:56:46,971 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:56:46,971 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:56:46,972 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:56:46,972 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:56:46,989 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-22 08:56:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:56:46,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:46,995 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:46,997 INFO L410 AbstractCegarLoop]: === Iteration 1 === [gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:56:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:47,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1793788466, now seen corresponding path program 1 times [2019-10-22 08:56:47,016 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:47,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635931420] [2019-10-22 08:56:47,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:47,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:47,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:47,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635931420] [2019-10-22 08:56:47,236 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:47,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:56:47,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977135332] [2019-10-22 08:56:47,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:56:47,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:47,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:56:47,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:47,260 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 6 states. [2019-10-22 08:56:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:47,439 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-10-22 08:56:47,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:56:47,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-10-22 08:56:47,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:47,449 INFO L225 Difference]: With dead ends: 36 [2019-10-22 08:56:47,449 INFO L226 Difference]: Without dead ends: 16 [2019-10-22 08:56:47,452 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-22 08:56:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-22 08:56:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-22 08:56:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-22 08:56:47,485 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2019-10-22 08:56:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:47,485 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-22 08:56:47,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:56:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-22 08:56:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:56:47,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:47,486 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:47,486 INFO L410 AbstractCegarLoop]: === Iteration 2 === [gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:56:47,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:47,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1793788690, now seen corresponding path program 1 times [2019-10-22 08:56:47,487 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:47,487 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101804635] [2019-10-22 08:56:47,487 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:47,487 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:47,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:47,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101804635] [2019-10-22 08:56:47,527 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:47,527 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:56:47,527 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941983119] [2019-10-22 08:56:47,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:56:47,528 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:47,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:56:47,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:47,529 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-10-22 08:56:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:47,578 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2019-10-22 08:56:47,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:56:47,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-10-22 08:56:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:47,579 INFO L225 Difference]: With dead ends: 16 [2019-10-22 08:56:47,580 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 08:56:47,580 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 08:56:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 08:56:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 08:56:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 08:56:47,581 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2019-10-22 08:56:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:47,582 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:56:47,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:56:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:56:47,582 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 08:56:47,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 08:56:47,716 INFO L443 ceAbstractionStarter]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2019-10-22 08:56:47,716 INFO L443 ceAbstractionStarter]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2019-10-22 08:56:47,716 INFO L443 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-10-22 08:56:47,716 INFO L443 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2019-10-22 08:56:47,717 INFO L446 ceAbstractionStarter]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2019-10-22 08:56:47,717 INFO L443 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2019-10-22 08:56:47,717 INFO L439 ceAbstractionStarter]: At program point L25-2(line 25) the Hoare annotation is: (or (not (<= |gcd_#in~y1| 2147483647)) (and (<= gcd_~y2 (+ gcd_~y1 2147483646)) (<= gcd_~y2 2147483647) (<= gcd_~y1 2147483647) (<= gcd_~y1 (+ gcd_~y2 2147483646))) (not (<= |gcd_#in~y2| 2147483647))) [2019-10-22 08:56:47,717 INFO L443 ceAbstractionStarter]: For program point L22(lines 22 24) no Hoare annotation was computed. [2019-10-22 08:56:47,717 INFO L443 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-10-22 08:56:47,717 INFO L443 ceAbstractionStarter]: For program point L25-3(line 25) no Hoare annotation was computed. [2019-10-22 08:56:47,717 INFO L439 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (or (not (<= |gcd_#in~y1| 2147483647)) (and (<= gcd_~y2 (+ gcd_~y1 2147483646)) (<= gcd_~y2 2147483647) (<= gcd_~y1 2147483647) (<= gcd_~y1 (+ gcd_~y2 2147483646))) (not (<= |gcd_#in~y2| 2147483647))) [2019-10-22 08:56:47,718 INFO L443 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-10-22 08:56:47,718 INFO L443 ceAbstractionStarter]: For program point L19(lines 19 21) no Hoare annotation was computed. [2019-10-22 08:56:47,718 INFO L443 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2019-10-22 08:56:47,718 INFO L443 ceAbstractionStarter]: For program point gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2019-10-22 08:56:47,718 INFO L443 ceAbstractionStarter]: For program point gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2019-10-22 08:56:47,718 INFO L443 ceAbstractionStarter]: For program point gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2019-10-22 08:56:47,718 INFO L443 ceAbstractionStarter]: For program point gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2019-10-22 08:56:47,718 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 08:56:47,719 INFO L443 ceAbstractionStarter]: For program point L30(lines 30 32) no Hoare annotation was computed. [2019-10-22 08:56:47,719 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 08:56:47,721 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 08:56:47,721 INFO L446 ceAbstractionStarter]: At program point L41(lines 28 43) the Hoare annotation is: true [2019-10-22 08:56:47,721 INFO L443 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-10-22 08:56:47,721 INFO L443 ceAbstractionStarter]: For program point L38(lines 38 42) no Hoare annotation was computed. [2019-10-22 08:56:47,721 INFO L439 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= ULTIMATE.start_main_~n~0 2147483647) (<= ULTIMATE.start_main_~m~0 2147483647)) [2019-10-22 08:56:47,721 INFO L443 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-10-22 08:56:47,721 INFO L443 ceAbstractionStarter]: For program point L34(lines 34 36) no Hoare annotation was computed. [2019-10-22 08:56:47,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:56:47 BoogieIcfgContainer [2019-10-22 08:56:47,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:56:47,728 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:56:47,728 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:56:47,728 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:56:47,729 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:46" (3/4) ... [2019-10-22 08:56:47,733 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 08:56:47,740 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2019-10-22 08:56:47,744 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 08:56:47,745 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-10-22 08:56:47,794 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_013a4afe-94e7-4469-be47-4bd3d751eaac/bin/uautomizer/witness.graphml [2019-10-22 08:56:47,794 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:56:47,797 INFO L168 Benchmark]: Toolchain (without parser) took 1474.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 940.4 MB in the beginning and 1.1 GB in the end (delta: -122.1 MB). Peak memory consumption was 34.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:47,798 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:47,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 940.4 MB in the beginning and 1.2 GB in the end (delta: -214.0 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:47,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:47,799 INFO L168 Benchmark]: Boogie Preprocessor took 34.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:47,800 INFO L168 Benchmark]: RCFGBuilder took 258.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:47,800 INFO L168 Benchmark]: TraceAbstraction took 845.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 60.5 MB). Peak memory consumption was 60.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:47,801 INFO L168 Benchmark]: Witness Printer took 65.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:47,812 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 233.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 940.4 MB in the beginning and 1.2 GB in the end (delta: -214.0 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 34.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. * RCFGBuilder took 258.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 845.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 60.5 MB). Peak memory consumption was 60.5 MB. Max. memory is 11.5 GB. * Witness Printer took 65.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 4 error locations. Result: SAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 20 SDtfs, 70 SDslu, 44 SDs, 0 SdLazy, 96 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 5 LocationsWithAnnotation, 11 PreInvPairs, 13 NumberOfFragments, 61 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 12 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 464 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...