./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/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 6c09c2a46ed7454ea61f3b2ddb99e3e2ba9fd4da ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 05:51:04,318 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 05:51:04,319 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 05:51:04,330 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 05:51:04,330 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 05:51:04,331 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 05:51:04,332 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 05:51:04,333 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 05:51:04,335 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 05:51:04,336 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 05:51:04,336 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 05:51:04,337 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 05:51:04,337 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 05:51:04,339 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 05:51:04,340 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 05:51:04,340 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 05:51:04,341 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 05:51:04,343 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 05:51:04,344 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 05:51:04,345 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 05:51:04,347 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 05:51:04,351 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 05:51:04,353 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 05:51:04,353 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 05:51:04,353 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 05:51:04,359 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 05:51:04,360 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 05:51:04,361 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 05:51:04,361 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 05:51:04,364 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 05:51:04,366 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 05:51:04,367 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 05:51:04,367 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 05:51:04,367 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 05:51:04,368 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 05:51:04,369 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 05:51:04,369 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-10-27 05:51:04,389 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 05:51:04,395 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 05:51:04,396 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 05:51:04,396 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 05:51:04,397 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 05:51:04,397 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 05:51:04,397 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 05:51:04,398 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 05:51:04,398 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 05:51:04,398 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 05:51:04,398 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 05:51:04,400 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 05:51:04,401 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 05:51:04,402 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 05:51:04,402 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 05:51:04,402 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 05:51:04,402 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 05:51:04,402 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 05:51:04,403 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-10-27 05:51:04,403 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 05:51:04,403 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 05:51:04,403 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 05:51:04,403 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 05:51:04,403 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 05:51:04,404 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 05:51:04,404 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 05:51:04,404 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 05:51:04,404 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 05:51:04,404 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 05:51:04,404 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 05:51:04,405 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 05:51:04,405 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 05:51:04,405 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 05:51:04,405 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_08788c29-e6ec-4a05-b849-cca977a5f44b/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 -> 6c09c2a46ed7454ea61f3b2ddb99e3e2ba9fd4da [2018-10-27 05:51:04,456 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 05:51:04,467 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 05:51:04,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 05:51:04,471 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 05:51:04,472 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 05:51:04,472 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c [2018-10-27 05:51:04,521 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/data/d49bbef75/84390a001cb649038af9619da7df27f3/FLAG7d047a5c8 [2018-10-27 05:51:04,860 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 05:51:04,860 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c [2018-10-27 05:51:04,865 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/data/d49bbef75/84390a001cb649038af9619da7df27f3/FLAG7d047a5c8 [2018-10-27 05:51:04,879 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/data/d49bbef75/84390a001cb649038af9619da7df27f3 [2018-10-27 05:51:04,883 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 05:51:04,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 05:51:04,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 05:51:04,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 05:51:04,889 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 05:51:04,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:51:04" (1/1) ... [2018-10-27 05:51:04,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ce6d6bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:04, skipping insertion in model container [2018-10-27 05:51:04,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:51:04" (1/1) ... [2018-10-27 05:51:04,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 05:51:04,913 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 05:51:05,038 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:51:05,041 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 05:51:05,051 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:51:05,060 INFO L193 MainTranslator]: Completed translation [2018-10-27 05:51:05,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05 WrapperNode [2018-10-27 05:51:05,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 05:51:05,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 05:51:05,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 05:51:05,062 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 05:51:05,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05" (1/1) ... [2018-10-27 05:51:05,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05" (1/1) ... [2018-10-27 05:51:05,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 05:51:05,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 05:51:05,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 05:51:05,079 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 05:51:05,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05" (1/1) ... [2018-10-27 05:51:05,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05" (1/1) ... [2018-10-27 05:51:05,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05" (1/1) ... [2018-10-27 05:51:05,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05" (1/1) ... [2018-10-27 05:51:05,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05" (1/1) ... [2018-10-27 05:51:05,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05" (1/1) ... [2018-10-27 05:51:05,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05" (1/1) ... [2018-10-27 05:51:05,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 05:51:05,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 05:51:05,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 05:51:05,097 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 05:51:05,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/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 [2018-10-27 05:51:05,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 05:51:05,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 05:51:05,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 05:51:05,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 05:51:05,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 05:51:05,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 05:51:05,532 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 05:51:05,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:51:05 BoogieIcfgContainer [2018-10-27 05:51:05,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 05:51:05,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 05:51:05,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 05:51:05,536 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 05:51:05,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:51:04" (1/3) ... [2018-10-27 05:51:05,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479bf735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:51:05, skipping insertion in model container [2018-10-27 05:51:05,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:51:05" (2/3) ... [2018-10-27 05:51:05,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479bf735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:51:05, skipping insertion in model container [2018-10-27 05:51:05,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:51:05" (3/3) ... [2018-10-27 05:51:05,541 INFO L112 eAbstractionObserver]: Analyzing ICFG BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c [2018-10-27 05:51:05,549 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 05:51:05,565 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-10-27 05:51:05,585 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-10-27 05:51:05,635 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 05:51:05,636 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 05:51:05,636 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 05:51:05,636 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 05:51:05,636 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 05:51:05,637 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 05:51:05,637 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 05:51:05,637 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 05:51:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-27 05:51:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-27 05:51:05,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:51:05,664 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:51:05,666 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:51:05,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:05,673 INFO L82 PathProgramCache]: Analyzing trace with hash 409964900, now seen corresponding path program 1 times [2018-10-27 05:51:05,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:51:05,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:05,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:51:05,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:05,728 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:51:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:51:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:05,881 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:51:05,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 05:51:05,882 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:51:05,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:51:05,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:51:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:51:05,897 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2018-10-27 05:51:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:51:06,111 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2018-10-27 05:51:06,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 05:51:06,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-27 05:51:06,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:51:06,120 INFO L225 Difference]: With dead ends: 49 [2018-10-27 05:51:06,120 INFO L226 Difference]: Without dead ends: 31 [2018-10-27 05:51:06,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:51:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-27 05:51:06,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-10-27 05:51:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-27 05:51:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-27 05:51:06,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2018-10-27 05:51:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:51:06,154 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-27 05:51:06,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:51:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-27 05:51:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-27 05:51:06,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:51:06,155 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:51:06,156 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:51:06,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:06,156 INFO L82 PathProgramCache]: Analyzing trace with hash 409965092, now seen corresponding path program 1 times [2018-10-27 05:51:06,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:51:06,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:06,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:51:06,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:06,158 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:51:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:51:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:06,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:51:06,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 05:51:06,200 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:51:06,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:51:06,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:51:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:51:06,202 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2018-10-27 05:51:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:51:06,478 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-10-27 05:51:06,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 05:51:06,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-27 05:51:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:51:06,480 INFO L225 Difference]: With dead ends: 32 [2018-10-27 05:51:06,480 INFO L226 Difference]: Without dead ends: 30 [2018-10-27 05:51:06,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:51:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-27 05:51:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2018-10-27 05:51:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-27 05:51:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-27 05:51:06,486 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2018-10-27 05:51:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:51:06,487 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-27 05:51:06,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:51:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-27 05:51:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 05:51:06,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:51:06,488 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:51:06,489 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:51:06,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:06,489 INFO L82 PathProgramCache]: Analyzing trace with hash -246154182, now seen corresponding path program 1 times [2018-10-27 05:51:06,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:51:06,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:06,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:51:06,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:06,491 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:51:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:51:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:06,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:51:06,584 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:51:06,585 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-27 05:51:06,586 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [21], [22], [24], [40], [41], [42] [2018-10-27 05:51:06,639 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:51:06,639 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:51:06,773 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:51:06,775 INFO L272 AbstractInterpreter]: Visited 12 different actions 15 times. Merged at 3 different actions 3 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-10-27 05:51:06,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:06,791 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:51:06,888 INFO L219 lantSequenceWeakener]: Could never weaken! [2018-10-27 05:51:06,889 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:51:07,074 INFO L415 sIntCurrentIteration]: We unified 14 AI predicates to 14 [2018-10-27 05:51:07,074 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:51:07,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:51:07,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2018-10-27 05:51:07,075 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:51:07,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:51:07,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:51:07,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:51:07,076 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2018-10-27 05:51:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:51:07,463 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-27 05:51:07,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 05:51:07,463 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-10-27 05:51:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:51:07,464 INFO L225 Difference]: With dead ends: 29 [2018-10-27 05:51:07,464 INFO L226 Difference]: Without dead ends: 28 [2018-10-27 05:51:07,464 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:51:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-27 05:51:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-10-27 05:51:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-27 05:51:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-10-27 05:51:07,471 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2018-10-27 05:51:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:51:07,471 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-10-27 05:51:07,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 05:51:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-10-27 05:51:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 05:51:07,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:51:07,473 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:51:07,474 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:51:07,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:07,474 INFO L82 PathProgramCache]: Analyzing trace with hash -246153990, now seen corresponding path program 1 times [2018-10-27 05:51:07,474 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:51:07,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:07,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:51:07,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:07,476 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:51:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:51:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:07,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:51:07,646 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:51:07,646 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-27 05:51:07,647 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [22], [24], [26], [27], [40], [41], [42] [2018-10-27 05:51:07,648 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:51:07,648 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:51:07,665 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:51:07,666 INFO L272 AbstractInterpreter]: Visited 13 different actions 18 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-10-27 05:51:07,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:07,679 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:51:07,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:51:07,679 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/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 [2018-10-27 05:51:07,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:51:07,688 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:51:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:51:07,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:51:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:07,768 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:51:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:07,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:51:07,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-10-27 05:51:07,921 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:51:07,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 05:51:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 05:51:07,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-10-27 05:51:07,922 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 8 states. [2018-10-27 05:51:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:51:08,577 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2018-10-27 05:51:08,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 05:51:08,577 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-27 05:51:08,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:51:08,579 INFO L225 Difference]: With dead ends: 60 [2018-10-27 05:51:08,579 INFO L226 Difference]: Without dead ends: 59 [2018-10-27 05:51:08,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2018-10-27 05:51:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-27 05:51:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-10-27 05:51:08,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-27 05:51:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2018-10-27 05:51:08,589 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 15 [2018-10-27 05:51:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:51:08,590 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2018-10-27 05:51:08,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 05:51:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2018-10-27 05:51:08,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 05:51:08,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:51:08,591 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:51:08,591 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:51:08,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:08,591 INFO L82 PathProgramCache]: Analyzing trace with hash 961216640, now seen corresponding path program 1 times [2018-10-27 05:51:08,591 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:51:08,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:08,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:51:08,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:08,594 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:51:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:51:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:08,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:51:08,660 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:51:08,660 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-27 05:51:08,660 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [21], [26], [28], [30], [40], [41], [42] [2018-10-27 05:51:08,662 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:51:08,662 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:51:08,688 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:51:08,688 INFO L272 AbstractInterpreter]: Visited 13 different actions 20 times. Merged at 6 different actions 6 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-10-27 05:51:08,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:08,690 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:51:08,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:51:08,690 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/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 [2018-10-27 05:51:08,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:51:08,699 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:51:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:51:08,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:51:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:08,801 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:51:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:08,863 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 05:51:08,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2018-10-27 05:51:08,863 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:51:08,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 05:51:08,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 05:51:08,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-10-27 05:51:08,865 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2018-10-27 05:51:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:51:08,930 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2018-10-27 05:51:08,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 05:51:08,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-27 05:51:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:51:08,935 INFO L225 Difference]: With dead ends: 42 [2018-10-27 05:51:08,935 INFO L226 Difference]: Without dead ends: 41 [2018-10-27 05:51:08,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-27 05:51:08,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-27 05:51:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2018-10-27 05:51:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-27 05:51:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-10-27 05:51:08,941 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2018-10-27 05:51:08,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:51:08,941 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2018-10-27 05:51:08,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 05:51:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2018-10-27 05:51:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 05:51:08,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:51:08,944 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:51:08,945 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:51:08,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash 961216832, now seen corresponding path program 1 times [2018-10-27 05:51:08,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:51:08,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:08,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:51:08,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:08,947 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:51:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:51:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:09,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:51:09,008 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:51:09,008 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-27 05:51:09,008 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [26], [27], [28], [30], [40], [41], [42] [2018-10-27 05:51:09,009 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:51:09,009 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:51:09,038 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:51:09,038 INFO L272 AbstractInterpreter]: Visited 12 different actions 18 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-10-27 05:51:09,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:09,076 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:51:09,132 INFO L219 lantSequenceWeakener]: Could never weaken! [2018-10-27 05:51:09,133 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:51:09,239 INFO L415 sIntCurrentIteration]: We unified 14 AI predicates to 14 [2018-10-27 05:51:09,239 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:51:09,239 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:51:09,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2018-10-27 05:51:09,240 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:51:09,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:51:09,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:51:09,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:51:09,240 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2018-10-27 05:51:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:51:09,533 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-10-27 05:51:09,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 05:51:09,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-10-27 05:51:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:51:09,534 INFO L225 Difference]: With dead ends: 40 [2018-10-27 05:51:09,534 INFO L226 Difference]: Without dead ends: 39 [2018-10-27 05:51:09,534 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:51:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-27 05:51:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-27 05:51:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-27 05:51:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2018-10-27 05:51:09,538 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2018-10-27 05:51:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:51:09,539 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2018-10-27 05:51:09,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 05:51:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2018-10-27 05:51:09,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-27 05:51:09,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:51:09,540 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:51:09,541 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:51:09,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:09,541 INFO L82 PathProgramCache]: Analyzing trace with hash -757382272, now seen corresponding path program 1 times [2018-10-27 05:51:09,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:51:09,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:09,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:51:09,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:51:09,547 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:51:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:51:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 05:51:09,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:51:09,632 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:51:09,632 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-10-27 05:51:09,632 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [22], [24], [26], [27], [28], [30], [40], [41], [42] [2018-10-27 05:51:09,633 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:51:09,634 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:51:09,715 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:51:09,715 INFO L272 AbstractInterpreter]: Visited 15 different actions 85 times. Merged at 9 different actions 60 times. Widened at 2 different actions 3 times. Found 11 fixpoints after 4 different actions. Largest state had 4 variables. [2018-10-27 05:51:09,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:51:09,738 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:51:09,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:51:09,739 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:51:09,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:51:09,747 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:51:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:51:09,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:51:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:09,850 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:51:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:51:10,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:51:10,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2018-10-27 05:51:10,060 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:51:10,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-27 05:51:10,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-27 05:51:10,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-10-27 05:51:10,061 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2018-10-27 05:51:10,588 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-10-27 05:51:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:51:10,599 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2018-10-27 05:51:10,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 05:51:10,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2018-10-27 05:51:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:51:10,601 INFO L225 Difference]: With dead ends: 53 [2018-10-27 05:51:10,601 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 05:51:10,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2018-10-27 05:51:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 05:51:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 05:51:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 05:51:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 05:51:10,603 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-10-27 05:51:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:51:10,603 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 05:51:10,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-27 05:51:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 05:51:10,603 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 05:51:10,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-27 05:51:10,671 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 05:51:10,675 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-27 05:51:10,934 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 18 [2018-10-27 05:51:10,936 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-27 05:51:10,936 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-27 05:51:10,936 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-27 05:51:10,937 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-27 05:51:10,937 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-27 05:51:10,937 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-27 05:51:10,937 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-10-27 05:51:10,937 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 14 28) no Hoare annotation was computed. [2018-10-27 05:51:10,937 INFO L425 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-10-27 05:51:10,937 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-10-27 05:51:10,937 INFO L425 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-10-27 05:51:10,937 INFO L425 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-10-27 05:51:10,937 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 25) no Hoare annotation was computed. [2018-10-27 05:51:10,937 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 14 28) no Hoare annotation was computed. [2018-10-27 05:51:10,938 INFO L425 ceAbstractionStarter]: For program point mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-10-27 05:51:10,938 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 14 28) the Hoare annotation is: true [2018-10-27 05:51:10,938 INFO L425 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-10-27 05:51:10,938 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-10-27 05:51:10,938 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 26) no Hoare annotation was computed. [2018-10-27 05:51:10,938 INFO L421 ceAbstractionStarter]: At program point L20-2(lines 19 25) the Hoare annotation is: (and (or (and (<= main_~y2~0 2147483646) (<= 0 main_~y2~0)) (and (<= 2 (* 2 main_~y2~0)) (<= main_~y2~0 2147483647))) (<= 1 main_~y1~0) (<= main_~y1~0 2147483647)) [2018-10-27 05:51:10,938 INFO L425 ceAbstractionStarter]: For program point L18-1(lines 18 26) no Hoare annotation was computed. [2018-10-27 05:51:10,938 INFO L425 ceAbstractionStarter]: For program point mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-10-27 05:51:10,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 05:51:10 BoogieIcfgContainer [2018-10-27 05:51:10,949 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 05:51:10,950 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 05:51:10,950 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 05:51:10,950 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 05:51:10,950 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:51:05" (3/4) ... [2018-10-27 05:51:10,954 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-27 05:51:10,961 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-27 05:51:10,962 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-27 05:51:10,966 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-10-27 05:51:10,966 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-27 05:51:10,966 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-27 05:51:11,005 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_08788c29-e6ec-4a05-b849-cca977a5f44b/bin-2019/utaipan/witness.graphml [2018-10-27 05:51:11,006 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 05:51:11,007 INFO L168 Benchmark]: Toolchain (without parser) took 6123.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 959.7 MB in the beginning and 1.1 GB in the end (delta: -124.1 MB). Peak memory consumption was 27.4 MB. Max. memory is 11.5 GB. [2018-10-27 05:51:11,008 INFO L168 Benchmark]: CDTParser took 0.17 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. [2018-10-27 05:51:11,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.06 ms. Allocated memory is still 1.0 GB. Free memory was 959.7 MB in the beginning and 948.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-27 05:51:11,009 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.82 ms. Allocated memory is still 1.0 GB. Free memory is still 948.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 05:51:11,009 INFO L168 Benchmark]: Boogie Preprocessor took 17.86 ms. Allocated memory is still 1.0 GB. Free memory was 948.9 MB in the beginning and 946.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 05:51:11,009 INFO L168 Benchmark]: RCFGBuilder took 436.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -194.6 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-10-27 05:51:11,012 INFO L168 Benchmark]: TraceAbstraction took 5415.91 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: 53.6 MB). Peak memory consumption was 53.6 MB. Max. memory is 11.5 GB. [2018-10-27 05:51:11,012 INFO L168 Benchmark]: Witness Printer took 56.24 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2018-10-27 05:51:11,015 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 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 176.06 ms. Allocated memory is still 1.0 GB. Free memory was 959.7 MB in the beginning and 948.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.82 ms. Allocated memory is still 1.0 GB. Free memory is still 948.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.86 ms. Allocated memory is still 1.0 GB. Free memory was 948.9 MB in the beginning and 946.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 436.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -194.6 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5415.91 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: 53.6 MB). Peak memory consumption was 53.6 MB. Max. memory is 11.5 GB. * Witness Printer took 56.24 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: 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: 19]: Loop Invariant Derived loop invariant: (((y2 <= 2147483646 && 0 <= y2) || (2 <= 2 * y2 && y2 <= 2147483647)) && 1 <= y1) && y1 <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 4 error locations. SAFE Result, 5.3s OverallTime, 7 OverallIterations, 4 TraceHistogramMax, 2.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 60 SDtfs, 164 SDslu, 130 SDs, 0 SdLazy, 288 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 180 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 5 AbstIntIterations, 2 AbstIntStrong, 1.0 AbsIntWeakeningRatio, 0.14285714285714285 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 63 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 12 NumberOfFragments, 28 HoareAnnotationTreeSize, 5 FomulaSimplifications, 807 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 858 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 202 ConstructedInterpolants, 15 QuantifiedInterpolants, 18670 SizeOfPredicates, 6 NumberOfNonLiveVariables, 107 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 27/89 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...