./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 31d0c4253184c01eb9f9573658b07bed7aa94585 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 09:52:46,836 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 09:52:46,837 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 09:52:46,843 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 09:52:46,843 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 09:52:46,844 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 09:52:46,844 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 09:52:46,845 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 09:52:46,847 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 09:52:46,847 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 09:52:46,848 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 09:52:46,848 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 09:52:46,848 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 09:52:46,849 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 09:52:46,850 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 09:52:46,850 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 09:52:46,850 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 09:52:46,852 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 09:52:46,853 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 09:52:46,854 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 09:52:46,854 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 09:52:46,855 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 09:52:46,857 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 09:52:46,857 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 09:52:46,857 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 09:52:46,858 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 09:52:46,858 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 09:52:46,859 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 09:52:46,859 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 09:52:46,860 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 09:52:46,860 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 09:52:46,861 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 09:52:46,861 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 09:52:46,861 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 09:52:46,862 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 09:52:46,862 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 09:52:46,862 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-11-18 09:52:46,872 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 09:52:46,872 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 09:52:46,873 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 09:52:46,873 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 09:52:46,873 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 09:52:46,873 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 09:52:46,873 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 09:52:46,873 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 09:52:46,874 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 09:52:46,874 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 09:52:46,874 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 09:52:46,874 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 09:52:46,874 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 09:52:46,874 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 09:52:46,874 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 09:52:46,874 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 09:52:46,875 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 09:52:46,875 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 09:52:46,875 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 09:52:46,875 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 09:52:46,875 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 09:52:46,875 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 09:52:46,875 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 09:52:46,875 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 09:52:46,876 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 09:52:46,876 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 09:52:46,876 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 09:52:46,876 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 09:52:46,876 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:52:46,876 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 09:52:46,876 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 09:52:46,876 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 09:52:46,876 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 09:52:46,876 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 09:52:46,877 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 09:52:46,877 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 09:52:46,877 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/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 ! overflow) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31d0c4253184c01eb9f9573658b07bed7aa94585 [2018-11-18 09:52:46,898 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 09:52:46,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 09:52:46,907 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 09:52:46,908 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 09:52:46,908 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 09:52:46,909 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2_true-termination_true-no-overflow.c [2018-11-18 09:52:46,943 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/data/1ae6f8ecb/20f0609c0378471fbab55b1024bf094e/FLAG332886e8b [2018-11-18 09:52:47,342 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 09:52:47,343 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2_true-termination_true-no-overflow.c [2018-11-18 09:52:47,346 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/data/1ae6f8ecb/20f0609c0378471fbab55b1024bf094e/FLAG332886e8b [2018-11-18 09:52:47,355 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/data/1ae6f8ecb/20f0609c0378471fbab55b1024bf094e [2018-11-18 09:52:47,357 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 09:52:47,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 09:52:47,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 09:52:47,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 09:52:47,362 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 09:52:47,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:52:47" (1/1) ... [2018-11-18 09:52:47,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@95268b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47, skipping insertion in model container [2018-11-18 09:52:47,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:52:47" (1/1) ... [2018-11-18 09:52:47,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 09:52:47,385 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 09:52:47,487 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:52:47,489 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 09:52:47,498 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:52:47,508 INFO L195 MainTranslator]: Completed translation [2018-11-18 09:52:47,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47 WrapperNode [2018-11-18 09:52:47,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 09:52:47,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 09:52:47,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 09:52:47,509 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 09:52:47,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47" (1/1) ... [2018-11-18 09:52:47,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47" (1/1) ... [2018-11-18 09:52:47,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 09:52:47,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 09:52:47,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 09:52:47,522 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 09:52:47,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47" (1/1) ... [2018-11-18 09:52:47,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47" (1/1) ... [2018-11-18 09:52:47,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47" (1/1) ... [2018-11-18 09:52:47,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47" (1/1) ... [2018-11-18 09:52:47,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47" (1/1) ... [2018-11-18 09:52:47,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47" (1/1) ... [2018-11-18 09:52:47,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47" (1/1) ... [2018-11-18 09:52:47,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 09:52:47,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 09:52:47,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 09:52:47,534 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 09:52:47,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/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 [2018-11-18 09:52:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 09:52:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 09:52:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 09:52:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 09:52:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 09:52:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 09:52:47,691 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 09:52:47,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:52:47 BoogieIcfgContainer [2018-11-18 09:52:47,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 09:52:47,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 09:52:47,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 09:52:47,693 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 09:52:47,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:52:47" (1/3) ... [2018-11-18 09:52:47,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ee215f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:52:47, skipping insertion in model container [2018-11-18 09:52:47,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:52:47" (2/3) ... [2018-11-18 09:52:47,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ee215f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:52:47, skipping insertion in model container [2018-11-18 09:52:47,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:52:47" (3/3) ... [2018-11-18 09:52:47,695 INFO L112 eAbstractionObserver]: Analyzing ICFG Urban-WST2013-Fig2_true-termination_true-no-overflow.c [2018-11-18 09:52:47,700 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 09:52:47,705 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-11-18 09:52:47,716 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-11-18 09:52:47,739 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 09:52:47,739 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 09:52:47,739 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 09:52:47,739 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 09:52:47,739 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 09:52:47,739 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 09:52:47,739 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 09:52:47,740 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 09:52:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-11-18 09:52:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 09:52:47,755 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:52:47,756 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:52:47,758 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 09:52:47,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:52:47,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1432253197, now seen corresponding path program 1 times [2018-11-18 09:52:47,762 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:52:47,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:47,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:52:47,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:47,803 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:52:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:52:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:52:47,836 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:52:47,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 09:52:47,836 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:52:47,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 09:52:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 09:52:47,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 09:52:47,848 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-11-18 09:52:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:52:47,859 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2018-11-18 09:52:47,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 09:52:47,860 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-11-18 09:52:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:52:47,865 INFO L225 Difference]: With dead ends: 39 [2018-11-18 09:52:47,866 INFO L226 Difference]: Without dead ends: 17 [2018-11-18 09:52:47,867 INFO L604 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 [2018-11-18 09:52:47,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-18 09:52:47,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-18 09:52:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-18 09:52:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-11-18 09:52:47,894 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2018-11-18 09:52:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:52:47,894 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-11-18 09:52:47,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 09:52:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-11-18 09:52:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 09:52:47,894 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:52:47,894 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:52:47,895 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 09:52:47,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:52:47,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1450187957, now seen corresponding path program 1 times [2018-11-18 09:52:47,895 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:52:47,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:47,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:52:47,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:47,897 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:52:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:52:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:52:47,938 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:52:47,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 09:52:47,938 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:52:47,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 09:52:47,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 09:52:47,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:52:47,940 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 3 states. [2018-11-18 09:52:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:52:47,958 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-11-18 09:52:47,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 09:52:47,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-18 09:52:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:52:47,959 INFO L225 Difference]: With dead ends: 33 [2018-11-18 09:52:47,959 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 09:52:47,960 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:52:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 09:52:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 09:52:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 09:52:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-11-18 09:52:47,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2018-11-18 09:52:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:52:47,964 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-11-18 09:52:47,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 09:52:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-11-18 09:52:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 09:52:47,964 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:52:47,965 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:52:47,965 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 09:52:47,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:52:47,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1450187902, now seen corresponding path program 1 times [2018-11-18 09:52:47,965 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:52:47,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:47,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:52:47,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:47,967 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:52:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:52:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:52:47,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:52:47,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 09:52:47,981 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:52:47,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 09:52:47,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 09:52:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:52:47,981 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 3 states. [2018-11-18 09:52:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:52:47,993 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-11-18 09:52:47,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 09:52:47,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-18 09:52:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:52:47,994 INFO L225 Difference]: With dead ends: 23 [2018-11-18 09:52:47,994 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 09:52:47,994 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:52:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 09:52:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-11-18 09:52:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 09:52:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-11-18 09:52:47,997 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2018-11-18 09:52:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:52:47,997 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-11-18 09:52:47,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 09:52:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-11-18 09:52:47,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 09:52:47,998 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:52:47,998 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:52:47,998 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 09:52:47,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:52:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash -802592061, now seen corresponding path program 1 times [2018-11-18 09:52:47,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:52:47,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:48,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:52:48,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:48,000 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:52:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:52:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:52:48,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:52:48,036 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 09:52:48,037 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-11-18 09:52:48,038 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [14], [18], [22], [24], [26], [28], [32], [41], [42], [43] [2018-11-18 09:52:48,059 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 09:52:48,059 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 09:52:48,144 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 09:52:48,145 INFO L272 AbstractInterpreter]: Visited 13 different actions 29 times. Merged at 6 different actions 14 times. Never widened. Performed 79 root evaluator evaluations with a maximum evaluation depth of 3. Performed 79 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 09:52:48,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:52:48,150 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 09:52:48,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:52:48,151 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:52:48,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:52:48,157 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:52:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:52:48,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:52:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:52:48,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:52:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:52:48,226 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 09:52:48,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 6 [2018-11-18 09:52:48,226 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:52:48,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 09:52:48,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 09:52:48,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:52:48,227 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2018-11-18 09:52:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:52:48,237 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2018-11-18 09:52:48,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 09:52:48,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-11-18 09:52:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:52:48,238 INFO L225 Difference]: With dead ends: 20 [2018-11-18 09:52:48,238 INFO L226 Difference]: Without dead ends: 19 [2018-11-18 09:52:48,238 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:52:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-18 09:52:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-18 09:52:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-18 09:52:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-11-18 09:52:48,240 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-11-18 09:52:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:52:48,240 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-11-18 09:52:48,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 09:52:48,241 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-11-18 09:52:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 09:52:48,241 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:52:48,241 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:52:48,241 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 09:52:48,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:52:48,242 INFO L82 PathProgramCache]: Analyzing trace with hash 889449950, now seen corresponding path program 1 times [2018-11-18 09:52:48,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:52:48,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:48,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:52:48,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:48,243 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:52:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:52:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:52:48,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:52:48,275 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 09:52:48,275 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-18 09:52:48,275 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [14], [18], [22], [24], [26], [28], [33], [34], [41], [42], [43] [2018-11-18 09:52:48,276 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 09:52:48,276 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 09:52:48,301 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 09:52:48,302 INFO L272 AbstractInterpreter]: Visited 14 different actions 31 times. Merged at 7 different actions 15 times. Never widened. Performed 85 root evaluator evaluations with a maximum evaluation depth of 3. Performed 85 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 09:52:48,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:52:48,305 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 09:52:48,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:52:48,306 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:52:48,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:52:48,312 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:52:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:52:48,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:52:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:52:48,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:52:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:52:48,385 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 09:52:48,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 6 [2018-11-18 09:52:48,386 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:52:48,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 09:52:48,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 09:52:48,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:52:48,386 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 3 states. [2018-11-18 09:52:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:52:48,391 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-11-18 09:52:48,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 09:52:48,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-11-18 09:52:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:52:48,392 INFO L225 Difference]: With dead ends: 19 [2018-11-18 09:52:48,392 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 09:52:48,392 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:52:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 09:52:48,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 09:52:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 09:52:48,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 09:52:48,395 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-11-18 09:52:48,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:52:48,395 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 09:52:48,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 09:52:48,395 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 09:52:48,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 09:52:48,395 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:52:48,396 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:52:48,396 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 09:52:48,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:52:48,396 INFO L82 PathProgramCache]: Analyzing trace with hash 889451648, now seen corresponding path program 1 times [2018-11-18 09:52:48,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:52:48,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:48,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:52:48,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:52:48,398 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:52:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:52:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:52:48,425 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:52:48,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 09:52:48,426 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:52:48,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 09:52:48,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 09:52:48,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:52:48,426 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2018-11-18 09:52:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:52:48,437 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2018-11-18 09:52:48,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 09:52:48,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-11-18 09:52:48,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:52:48,438 INFO L225 Difference]: With dead ends: 18 [2018-11-18 09:52:48,438 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 09:52:48,438 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:52:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 09:52:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 09:52:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 09:52:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 09:52:48,439 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-11-18 09:52:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:52:48,439 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 09:52:48,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 09:52:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 09:52:48,439 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 09:52:48,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 09:52:48,477 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 09:52:48,477 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 09:52:48,477 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 09:52:48,477 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 09:52:48,477 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 09:52:48,477 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 09:52:48,478 INFO L425 ceAbstractionStarter]: For program point mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2018-11-18 09:52:48,478 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 14 27) no Hoare annotation was computed. [2018-11-18 09:52:48,478 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 23) no Hoare annotation was computed. [2018-11-18 09:52:48,478 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 25) no Hoare annotation was computed. [2018-11-18 09:52:48,478 INFO L421 ceAbstractionStarter]: At program point L21-3(lines 21 23) the Hoare annotation is: (and (<= main_~x2~0 10) (<= main_~x1~0 10) (<= 0 (+ main_~x1~0 2147483648))) [2018-11-18 09:52:48,478 INFO L425 ceAbstractionStarter]: For program point L21-4(lines 21 23) no Hoare annotation was computed. [2018-11-18 09:52:48,478 INFO L421 ceAbstractionStarter]: At program point L19-3(lines 19 25) the Hoare annotation is: (<= 0 (+ main_~x1~0 2147483648)) [2018-11-18 09:52:48,479 INFO L425 ceAbstractionStarter]: For program point L19-4(lines 19 25) no Hoare annotation was computed. [2018-11-18 09:52:48,479 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 14 27) no Hoare annotation was computed. [2018-11-18 09:52:48,479 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2018-11-18 09:52:48,479 INFO L425 ceAbstractionStarter]: For program point mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2018-11-18 09:52:48,479 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 14 27) the Hoare annotation is: true [2018-11-18 09:52:48,479 INFO L425 ceAbstractionStarter]: For program point L24(line 24) no Hoare annotation was computed. [2018-11-18 09:52:48,479 INFO L425 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-11-18 09:52:48,479 INFO L425 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2018-11-18 09:52:48,479 INFO L425 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2018-11-18 09:52:48,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 09:52:48 BoogieIcfgContainer [2018-11-18 09:52:48,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 09:52:48,487 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 09:52:48,487 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 09:52:48,487 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 09:52:48,488 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:52:47" (3/4) ... [2018-11-18 09:52:48,490 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 09:52:48,493 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 09:52:48,493 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 09:52:48,496 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 09:52:48,496 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 09:52:48,496 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 09:52:48,522 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_87ab29d7-cba0-4350-bb7f-f856bdc5df7c/bin-2019/utaipan/witness.graphml [2018-11-18 09:52:48,522 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 09:52:48,523 INFO L168 Benchmark]: Toolchain (without parser) took 1165.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 959.1 MB in the beginning and 1.0 GB in the end (delta: -60.4 MB). Peak memory consumption was 66.5 MB. Max. memory is 11.5 GB. [2018-11-18 09:52:48,524 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:52:48,525 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.53 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-18 09:52:48,525 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.69 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:52:48,525 INFO L168 Benchmark]: Boogie Preprocessor took 11.93 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 945.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:52:48,526 INFO L168 Benchmark]: RCFGBuilder took 157.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -164.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 09:52:48,526 INFO L168 Benchmark]: TraceAbstraction took 795.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 87.0 MB). Peak memory consumption was 87.0 MB. Max. memory is 11.5 GB. [2018-11-18 09:52:48,526 INFO L168 Benchmark]: Witness Printer took 35.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-18 09:52:48,528 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 149.53 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.69 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.93 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 945.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 157.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -164.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 795.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 87.0 MB). Peak memory consumption was 87.0 MB. Max. memory is 11.5 GB. * Witness Printer took 35.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 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: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 24]: 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: 21]: Loop Invariant Derived loop invariant: (x2 <= 10 && x1 <= 10) && 0 <= x1 + 2147483648 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 <= x1 + 2147483648 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 4 error locations. SAFE Result, 0.7s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 87 SDtfs, 16 SDslu, 32 SDs, 0 SdLazy, 30 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 9 NumberOfFragments, 21 HoareAnnotationTreeSize, 6 FomulaSimplifications, 19 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 3471 SizeOfPredicates, 2 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 12/16 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...