./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/recursive/EvenOdd01_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd01_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/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 32bit --witnessprinter.graph.data.programhash bec5669c6fe02e51518958076fea4487ada345cf ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 17:11:40,733 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 17:11:40,735 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 17:11:40,744 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 17:11:40,744 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 17:11:40,745 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 17:11:40,746 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 17:11:40,748 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 17:11:40,749 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 17:11:40,750 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 17:11:40,751 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 17:11:40,751 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 17:11:40,751 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 17:11:40,752 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 17:11:40,753 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 17:11:40,753 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 17:11:40,755 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 17:11:40,756 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 17:11:40,758 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 17:11:40,759 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 17:11:40,760 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 17:11:40,761 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 17:11:40,763 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 17:11:40,764 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 17:11:40,764 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 17:11:40,765 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 17:11:40,765 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 17:11:40,767 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 17:11:40,767 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 17:11:40,768 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 17:11:40,768 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 17:11:40,769 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 17:11:40,769 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 17:11:40,769 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 17:11:40,771 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 17:11:40,771 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 17:11:40,772 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-11-18 17:11:40,784 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 17:11:40,784 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 17:11:40,785 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 17:11:40,785 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 17:11:40,785 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 17:11:40,785 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 17:11:40,785 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 17:11:40,785 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 17:11:40,786 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 17:11:40,787 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 17:11:40,787 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 17:11:40,787 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 17:11:40,787 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 17:11:40,788 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 17:11:40,788 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 17:11:40,788 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 17:11:40,788 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 17:11:40,789 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 17:11:40,789 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 17:11:40,789 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 17:11:40,789 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 17:11:40,789 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 17:11:40,789 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 17:11:40,790 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 17:11:40,791 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 17:11:40,791 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 17:11:40,792 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 17:11:40,792 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 17:11:40,792 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 17:11:40,792 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 17:11:40,792 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 17:11:40,792 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 17:11:40,793 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 17:11:40,793 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 17:11:40,793 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 17:11:40,793 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 17:11:40,793 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 17:11:40,793 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 17:11:40,794 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 17:11:40,794 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_a38b7761-4c80-4498-a88e-74ecf8cf8007/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bec5669c6fe02e51518958076fea4487ada345cf [2018-11-18 17:11:40,822 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 17:11:40,832 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 17:11:40,835 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 17:11:40,836 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 17:11:40,836 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 17:11:40,837 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/../../sv-benchmarks/c/recursive/EvenOdd01_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 17:11:40,879 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/data/4dd8cd281/911b977e2899426ab188459aec1507a5/FLAGce8d15557 [2018-11-18 17:11:41,211 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 17:11:41,211 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/sv-benchmarks/c/recursive/EvenOdd01_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 17:11:41,216 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/data/4dd8cd281/911b977e2899426ab188459aec1507a5/FLAGce8d15557 [2018-11-18 17:11:41,228 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/data/4dd8cd281/911b977e2899426ab188459aec1507a5 [2018-11-18 17:11:41,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 17:11:41,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 17:11:41,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 17:11:41,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 17:11:41,236 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 17:11:41,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:11:41" (1/1) ... [2018-11-18 17:11:41,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f8ec8ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41, skipping insertion in model container [2018-11-18 17:11:41,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:11:41" (1/1) ... [2018-11-18 17:11:41,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 17:11:41,262 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 17:11:41,409 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:11:41,413 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 17:11:41,429 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:11:41,442 INFO L195 MainTranslator]: Completed translation [2018-11-18 17:11:41,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41 WrapperNode [2018-11-18 17:11:41,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 17:11:41,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 17:11:41,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 17:11:41,444 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 17:11:41,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41" (1/1) ... [2018-11-18 17:11:41,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41" (1/1) ... [2018-11-18 17:11:41,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 17:11:41,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 17:11:41,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 17:11:41,466 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 17:11:41,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41" (1/1) ... [2018-11-18 17:11:41,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41" (1/1) ... [2018-11-18 17:11:41,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41" (1/1) ... [2018-11-18 17:11:41,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41" (1/1) ... [2018-11-18 17:11:41,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41" (1/1) ... [2018-11-18 17:11:41,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41" (1/1) ... [2018-11-18 17:11:41,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41" (1/1) ... [2018-11-18 17:11:41,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 17:11:41,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 17:11:41,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 17:11:41,482 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 17:11:41,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/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 17:11:41,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 17:11:41,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 17:11:41,573 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2018-11-18 17:11:41,574 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2018-11-18 17:11:41,574 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2018-11-18 17:11:41,574 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2018-11-18 17:11:41,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 17:11:41,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 17:11:41,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 17:11:41,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 17:11:41,765 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 17:11:41,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:11:41 BoogieIcfgContainer [2018-11-18 17:11:41,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 17:11:41,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 17:11:41,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 17:11:41,769 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 17:11:41,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 05:11:41" (1/3) ... [2018-11-18 17:11:41,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1589a8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:11:41, skipping insertion in model container [2018-11-18 17:11:41,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:11:41" (2/3) ... [2018-11-18 17:11:41,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1589a8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:11:41, skipping insertion in model container [2018-11-18 17:11:41,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:11:41" (3/3) ... [2018-11-18 17:11:41,773 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd01_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 17:11:41,782 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 17:11:41,788 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-11-18 17:11:41,802 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-11-18 17:11:41,830 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 17:11:41,830 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 17:11:41,830 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 17:11:41,830 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 17:11:41,830 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 17:11:41,830 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 17:11:41,831 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 17:11:41,831 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 17:11:41,842 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-11-18 17:11:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 17:11:41,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:11:41,846 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:11:41,849 INFO L423 AbstractCegarLoop]: === Iteration 1 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:11:41,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:41,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1145007729, now seen corresponding path program 1 times [2018-11-18 17:11:41,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:11:41,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:41,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:11:41,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:41,886 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:11:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:41,994 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 17:11:41,996 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:11:41,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:11:41,996 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:11:41,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:11:42,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:11:42,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:11:42,014 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2018-11-18 17:11:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:11:42,164 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2018-11-18 17:11:42,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 17:11:42,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-18 17:11:42,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:11:42,173 INFO L225 Difference]: With dead ends: 53 [2018-11-18 17:11:42,173 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 17:11:42,175 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 17:11:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 17:11:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2018-11-18 17:11:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 17:11:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-11-18 17:11:42,205 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 11 [2018-11-18 17:11:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:11:42,205 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-11-18 17:11:42,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:11:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-11-18 17:11:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-18 17:11:42,206 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:11:42,206 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:11:42,207 INFO L423 AbstractCegarLoop]: === Iteration 2 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:11:42,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:42,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1135501172, now seen corresponding path program 1 times [2018-11-18 17:11:42,207 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:11:42,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:42,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:11:42,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:42,208 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:11:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:42,266 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 17:11:42,266 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:11:42,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:11:42,266 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:11:42,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:11:42,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:11:42,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:11:42,268 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 5 states. [2018-11-18 17:11:42,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:11:42,378 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-11-18 17:11:42,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 17:11:42,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-11-18 17:11:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:11:42,380 INFO L225 Difference]: With dead ends: 30 [2018-11-18 17:11:42,380 INFO L226 Difference]: Without dead ends: 29 [2018-11-18 17:11:42,381 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 17:11:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-18 17:11:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-11-18 17:11:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 17:11:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-11-18 17:11:42,385 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 12 [2018-11-18 17:11:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:11:42,385 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-11-18 17:11:42,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:11:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-11-18 17:11:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 17:11:42,386 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:11:42,386 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:11:42,386 INFO L423 AbstractCegarLoop]: === Iteration 3 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:11:42,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:42,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1227554316, now seen corresponding path program 1 times [2018-11-18 17:11:42,387 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:11:42,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:42,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:11:42,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:42,388 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:11:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:42,467 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 17:11:42,467 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:11:42,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:11:42,468 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:11:42,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:11:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:11:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:11:42,468 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 5 states. [2018-11-18 17:11:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:11:42,508 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-11-18 17:11:42,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:11:42,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 17:11:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:11:42,509 INFO L225 Difference]: With dead ends: 28 [2018-11-18 17:11:42,509 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 17:11:42,510 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 17:11:42,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 17:11:42,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 17:11:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 17:11:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-11-18 17:11:42,515 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2018-11-18 17:11:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:11:42,515 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-11-18 17:11:42,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:11:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-11-18 17:11:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 17:11:42,516 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:11:42,516 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:11:42,516 INFO L423 AbstractCegarLoop]: === Iteration 4 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:11:42,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:42,516 INFO L82 PathProgramCache]: Analyzing trace with hash -600521825, now seen corresponding path program 1 times [2018-11-18 17:11:42,516 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:11:42,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:42,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:11:42,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:42,517 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:11:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:42,562 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 17:11:42,563 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:11:42,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 17:11:42,563 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:11:42,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 17:11:42,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 17:11:42,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 17:11:42,564 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 7 states. [2018-11-18 17:11:42,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:11:42,686 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-11-18 17:11:42,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 17:11:42,687 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-11-18 17:11:42,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:11:42,688 INFO L225 Difference]: With dead ends: 35 [2018-11-18 17:11:42,688 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 17:11:42,688 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 17:11:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 17:11:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-11-18 17:11:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 17:11:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-11-18 17:11:42,693 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 18 [2018-11-18 17:11:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:11:42,693 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-11-18 17:11:42,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 17:11:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-11-18 17:11:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 17:11:42,694 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:11:42,694 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:11:42,695 INFO L423 AbstractCegarLoop]: === Iteration 5 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:11:42,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2031952855, now seen corresponding path program 1 times [2018-11-18 17:11:42,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:11:42,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:42,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:11:42,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:42,696 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:11:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:42,738 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:11:42,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:11:42,738 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:11:42,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:11:42,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:11:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:11:42,739 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 5 states. [2018-11-18 17:11:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:11:42,789 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-11-18 17:11:42,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:11:42,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-11-18 17:11:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:11:42,790 INFO L225 Difference]: With dead ends: 33 [2018-11-18 17:11:42,790 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 17:11:42,790 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 17:11:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 17:11:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-11-18 17:11:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 17:11:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-11-18 17:11:42,794 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 23 [2018-11-18 17:11:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:11:42,794 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-11-18 17:11:42,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:11:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-11-18 17:11:42,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-18 17:11:42,794 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:11:42,794 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:11:42,795 INFO L423 AbstractCegarLoop]: === Iteration 6 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:11:42,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:42,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1433970876, now seen corresponding path program 1 times [2018-11-18 17:11:42,795 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:11:42,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:42,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:11:42,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:42,796 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:11:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:43,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:11:43,045 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:11:43,045 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-11-18 17:11:43,047 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [11], [13], [17], [21], [25], [27], [28], [29], [36], [40], [50], [52], [54], [55], [56], [58] [2018-11-18 17:11:43,076 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:11:43,076 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:11:43,174 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 17:11:43,175 INFO L272 AbstractInterpreter]: Visited 20 different actions 40 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-11-18 17:11:43,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:43,187 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 17:11:43,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:11:43,187 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/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 17:11:43,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:11:43,196 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 17:11:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:43,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:11:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:43,235 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:11:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:43,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:11:43,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-11-18 17:11:43,398 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:11:43,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 17:11:43,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 17:11:43,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2018-11-18 17:11:43,399 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2018-11-18 17:11:43,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:11:43,526 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-11-18 17:11:43,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 17:11:43,527 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-11-18 17:11:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:11:43,527 INFO L225 Difference]: With dead ends: 40 [2018-11-18 17:11:43,527 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 17:11:43,528 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-11-18 17:11:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 17:11:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-11-18 17:11:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-18 17:11:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-11-18 17:11:43,531 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 24 [2018-11-18 17:11:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:11:43,532 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-11-18 17:11:43,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 17:11:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-11-18 17:11:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-18 17:11:43,533 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:11:43,533 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:11:43,533 INFO L423 AbstractCegarLoop]: === Iteration 7 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:11:43,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:43,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1111789655, now seen corresponding path program 1 times [2018-11-18 17:11:43,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:11:43,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:43,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:11:43,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:43,534 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:11:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:43,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:11:43,634 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:11:43,634 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-11-18 17:11:43,634 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [11], [12], [13], [17], [21], [25], [27], [29], [36], [40], [50], [52], [54], [55], [56], [58] [2018-11-18 17:11:43,635 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:11:43,636 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:11:43,656 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 17:11:43,656 INFO L272 AbstractInterpreter]: Visited 20 different actions 39 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 3. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-11-18 17:11:43,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:43,661 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 17:11:43,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:11:43,661 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/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 17:11:43,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:11:43,674 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 17:11:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:43,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:11:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:43,695 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:11:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:43,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:11:43,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-11-18 17:11:43,886 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:11:43,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 17:11:43,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 17:11:43,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2018-11-18 17:11:43,887 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 11 states. [2018-11-18 17:11:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:11:44,028 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-11-18 17:11:44,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 17:11:44,029 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2018-11-18 17:11:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:11:44,031 INFO L225 Difference]: With dead ends: 46 [2018-11-18 17:11:44,031 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 17:11:44,031 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2018-11-18 17:11:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 17:11:44,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-11-18 17:11:44,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-18 17:11:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-11-18 17:11:44,037 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 30 [2018-11-18 17:11:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:11:44,037 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-11-18 17:11:44,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 17:11:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-11-18 17:11:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 17:11:44,039 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:11:44,040 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:11:44,040 INFO L423 AbstractCegarLoop]: === Iteration 8 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:11:44,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:44,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2046248452, now seen corresponding path program 2 times [2018-11-18 17:11:44,040 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:11:44,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:44,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:11:44,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:44,041 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:11:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:44,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:11:44,207 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:11:44,207 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:11:44,207 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:11:44,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:11:44,208 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/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 [2018-11-18 17:11:44,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 17:11:44,216 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 17:11:44,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 17:11:44,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:11:44,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:11:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:44,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:11:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:44,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:11:44,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-11-18 17:11:44,409 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:11:44,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 17:11:44,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 17:11:44,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2018-11-18 17:11:44,410 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 13 states. [2018-11-18 17:11:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:11:44,514 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-11-18 17:11:44,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 17:11:44,522 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-11-18 17:11:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:11:44,523 INFO L225 Difference]: With dead ends: 52 [2018-11-18 17:11:44,523 INFO L226 Difference]: Without dead ends: 51 [2018-11-18 17:11:44,524 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2018-11-18 17:11:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-18 17:11:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-11-18 17:11:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-11-18 17:11:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-11-18 17:11:44,531 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 36 [2018-11-18 17:11:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:11:44,531 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-11-18 17:11:44,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 17:11:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-11-18 17:11:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 17:11:44,532 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:11:44,532 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:11:44,533 INFO L423 AbstractCegarLoop]: === Iteration 9 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:11:44,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:44,533 INFO L82 PathProgramCache]: Analyzing trace with hash -517011185, now seen corresponding path program 2 times [2018-11-18 17:11:44,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:11:44,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:44,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:11:44,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:44,536 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:11:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:44,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:11:44,712 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:11:44,712 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:11:44,712 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:11:44,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:11:44,712 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:11:44,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 17:11:44,719 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 17:11:44,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 17:11:44,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:11:44,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:11:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:44,741 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:11:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:45,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:11:45,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2018-11-18 17:11:45,031 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:11:45,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 17:11:45,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 17:11:45,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2018-11-18 17:11:45,032 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 15 states. [2018-11-18 17:11:45,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:11:45,173 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-11-18 17:11:45,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 17:11:45,173 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2018-11-18 17:11:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:11:45,174 INFO L225 Difference]: With dead ends: 58 [2018-11-18 17:11:45,174 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 17:11:45,175 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 17:11:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 17:11:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-11-18 17:11:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-18 17:11:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-11-18 17:11:45,181 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 42 [2018-11-18 17:11:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:11:45,181 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-11-18 17:11:45,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 17:11:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-11-18 17:11:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-18 17:11:45,182 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:11:45,182 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:11:45,182 INFO L423 AbstractCegarLoop]: === Iteration 10 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:11:45,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:11:45,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1095513932, now seen corresponding path program 3 times [2018-11-18 17:11:45,183 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:11:45,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:45,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:11:45,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:11:45,184 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:11:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:11:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:45,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:11:45,376 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:11:45,376 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:11:45,376 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:11:45,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:11:45,376 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:11:45,395 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 17:11:45,395 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 17:11:45,404 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 17:11:45,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:11:45,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:11:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-18 17:11:45,493 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:11:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:11:45,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:11:45,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 16] total 35 [2018-11-18 17:11:45,793 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:11:45,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 17:11:45,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 17:11:45,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 17:11:45,794 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 21 states. [2018-11-18 17:11:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:11:45,886 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-11-18 17:11:45,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 17:11:45,887 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2018-11-18 17:11:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:11:45,887 INFO L225 Difference]: With dead ends: 56 [2018-11-18 17:11:45,887 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 17:11:45,888 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 17:11:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 17:11:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 17:11:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 17:11:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 17:11:45,889 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2018-11-18 17:11:45,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:11:45,889 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 17:11:45,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 17:11:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 17:11:45,890 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 17:11:45,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 17:11:46,075 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 17:11:46,075 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 17:11:46,075 INFO L425 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2018-11-18 17:11:46,075 INFO L425 ceAbstractionStarter]: For program point L32-1(line 32) no Hoare annotation was computed. [2018-11-18 17:11:46,075 INFO L421 ceAbstractionStarter]: At program point L32-2(line 32) the Hoare annotation is: (or (and (<= 1 isEven_~n) (<= isEven_~n 2147483647)) (< |isEven_#in~n| 1) (< 2147483647 |isEven_#in~n|)) [2018-11-18 17:11:46,075 INFO L425 ceAbstractionStarter]: For program point L29(lines 29 33) no Hoare annotation was computed. [2018-11-18 17:11:46,075 INFO L425 ceAbstractionStarter]: For program point L32-3(line 32) no Hoare annotation was computed. [2018-11-18 17:11:46,075 INFO L425 ceAbstractionStarter]: For program point L27(lines 27 33) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L428 ceAbstractionStarter]: At program point isEvenENTRY(lines 26 34) the Hoare annotation is: true [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point isEvenEXIT(lines 26 34) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point isEvenFINAL(lines 26 34) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L421 ceAbstractionStarter]: At program point L22-2(line 22) the Hoare annotation is: (or (< 2147483647 |isOdd_#in~n|) (and (not (= isOdd_~n 0)) (<= isOdd_~n 2147483647) (<= 0 isOdd_~n) (not (= isOdd_~n 1))) (< |isOdd_#in~n| 0)) [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point L19(lines 19 23) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point L22-3(line 22) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point L17(lines 17 23) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point isOddFINAL(lines 16 24) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L428 ceAbstractionStarter]: At program point isOddENTRY(lines 16 24) the Hoare annotation is: true [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point isOddEXIT(lines 16 24) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 17:11:46,076 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 17:11:46,076 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 17:11:46,077 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 17:11:46,077 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 37 49) the Hoare annotation is: true [2018-11-18 17:11:46,077 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 37 49) no Hoare annotation was computed. [2018-11-18 17:11:46,077 INFO L425 ceAbstractionStarter]: For program point L47(line 47) no Hoare annotation was computed. [2018-11-18 17:11:46,077 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 37 49) no Hoare annotation was computed. [2018-11-18 17:11:46,077 INFO L425 ceAbstractionStarter]: For program point L44(lines 44 48) no Hoare annotation was computed. [2018-11-18 17:11:46,077 INFO L421 ceAbstractionStarter]: At program point L42(line 42) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 2147483647)) [2018-11-18 17:11:46,077 INFO L425 ceAbstractionStarter]: For program point L42-1(line 42) no Hoare annotation was computed. [2018-11-18 17:11:46,077 INFO L425 ceAbstractionStarter]: For program point L39(lines 39 41) no Hoare annotation was computed. [2018-11-18 17:11:46,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 05:11:46 BoogieIcfgContainer [2018-11-18 17:11:46,079 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 17:11:46,079 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 17:11:46,079 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 17:11:46,079 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 17:11:46,079 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:11:41" (3/4) ... [2018-11-18 17:11:46,081 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 17:11:46,086 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 17:11:46,086 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure isEven [2018-11-18 17:11:46,086 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure isOdd [2018-11-18 17:11:46,086 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 17:11:46,090 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 17:11:46,090 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 17:11:46,090 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 17:11:46,127 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a38b7761-4c80-4498-a88e-74ecf8cf8007/bin-2019/utaipan/witness.graphml [2018-11-18 17:11:46,128 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 17:11:46,128 INFO L168 Benchmark]: Toolchain (without parser) took 4897.26 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 221.8 MB). Free memory was 959.8 MB in the beginning and 971.7 MB in the end (delta: -11.9 MB). Peak memory consumption was 209.9 MB. Max. memory is 11.5 GB. [2018-11-18 17:11:46,129 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:11:46,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.51 ms. Allocated memory is still 1.0 GB. Free memory was 959.8 MB in the beginning and 943.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 11.5 GB. [2018-11-18 17:11:46,130 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.42 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:11:46,130 INFO L168 Benchmark]: Boogie Preprocessor took 16.03 ms. Allocated memory is still 1.0 GB. Free memory was 943.6 MB in the beginning and 940.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 17:11:46,130 INFO L168 Benchmark]: RCFGBuilder took 284.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -193.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2018-11-18 17:11:46,131 INFO L168 Benchmark]: TraceAbstraction took 4312.10 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 72.9 MB). Free memory was 1.1 GB in the beginning and 977.0 MB in the end (delta: 157.1 MB). Peak memory consumption was 230.0 MB. Max. memory is 11.5 GB. [2018-11-18 17:11:46,131 INFO L168 Benchmark]: Witness Printer took 48.84 ms. Allocated memory is still 1.3 GB. Free memory was 977.0 MB in the beginning and 971.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 17:11:46,133 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 210.51 ms. Allocated memory is still 1.0 GB. Free memory was 959.8 MB in the beginning and 943.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.42 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.03 ms. Allocated memory is still 1.0 GB. Free memory was 943.6 MB in the beginning and 940.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 284.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -193.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4312.10 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 72.9 MB). Free memory was 1.1 GB in the beginning and 977.0 MB in the end (delta: 157.1 MB). Peak memory consumption was 230.0 MB. Max. memory is 11.5 GB. * Witness Printer took 48.84 ms. Allocated memory is still 1.3 GB. Free memory was 977.0 MB in the beginning and 971.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 32]: 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 - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 4 error locations. SAFE Result, 4.2s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 146 SDtfs, 198 SDslu, 743 SDs, 0 SdLazy, 657 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 466 GetRequests, 301 SyntacticMatches, 6 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=9, 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, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 21 PreInvPairs, 21 NumberOfFragments, 53 HoareAnnotationTreeSize, 21 FomulaSimplifications, 355 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 386 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 441 NumberOfCodeBlocks, 441 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 601 ConstructedInterpolants, 0 QuantifiedInterpolants, 85633 SizeOfPredicates, 30 NumberOfNonLiveVariables, 325 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 46/373 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...