./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d28857c86a3c83fc75b1b8cf8125f1c52a370911 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 14:23:19,773 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 14:23:19,775 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 14:23:19,782 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 14:23:19,783 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 14:23:19,783 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 14:23:19,784 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 14:23:19,785 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 14:23:19,786 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 14:23:19,787 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 14:23:19,788 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 14:23:19,788 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 14:23:19,788 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 14:23:19,790 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 14:23:19,790 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 14:23:19,791 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 14:23:19,791 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 14:23:19,793 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 14:23:19,794 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 14:23:19,796 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 14:23:19,796 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 14:23:19,797 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 14:23:19,799 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 14:23:19,799 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 14:23:19,799 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 14:23:19,800 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 14:23:19,801 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 14:23:19,801 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 14:23:19,802 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 14:23:19,803 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 14:23:19,803 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 14:23:19,803 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 14:23:19,803 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 14:23:19,804 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 14:23:19,804 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 14:23:19,804 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 14:23:19,805 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-11-18 14:23:19,815 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 14:23:19,816 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 14:23:19,816 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 14:23:19,816 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 14:23:19,817 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 14:23:19,817 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 14:23:19,817 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 14:23:19,817 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 14:23:19,817 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 14:23:19,817 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 14:23:19,817 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 14:23:19,817 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 14:23:19,817 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 14:23:19,818 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 14:23:19,818 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 14:23:19,818 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 14:23:19,818 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 14:23:19,819 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 14:23:19,819 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 14:23:19,819 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 14:23:19,819 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 14:23:19,819 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 14:23:19,819 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 14:23:19,820 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 14:23:19,821 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 14:23:19,821 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 14:23:19,821 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 14:23:19,821 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 14:23:19,821 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 14:23:19,821 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 14:23:19,821 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 14:23:19,821 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 14:23:19,822 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 14:23:19,822 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 14:23:19,822 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 14:23:19,822 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 14:23:19,822 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_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d28857c86a3c83fc75b1b8cf8125f1c52a370911 [2018-11-18 14:23:19,843 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 14:23:19,851 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 14:23:19,853 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 14:23:19,854 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 14:23:19,854 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 14:23:19,855 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/../../sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c [2018-11-18 14:23:19,890 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/data/73dc7ff98/8d1525b929c249a8be70fb2d3130130c/FLAG66117e9c9 [2018-11-18 14:23:20,288 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 14:23:20,289 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c [2018-11-18 14:23:20,292 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/data/73dc7ff98/8d1525b929c249a8be70fb2d3130130c/FLAG66117e9c9 [2018-11-18 14:23:20,300 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/data/73dc7ff98/8d1525b929c249a8be70fb2d3130130c [2018-11-18 14:23:20,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 14:23:20,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 14:23:20,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 14:23:20,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 14:23:20,306 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 14:23:20,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:23:20" (1/1) ... [2018-11-18 14:23:20,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43218d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20, skipping insertion in model container [2018-11-18 14:23:20,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:23:20" (1/1) ... [2018-11-18 14:23:20,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 14:23:20,325 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 14:23:20,421 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 14:23:20,423 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 14:23:20,431 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 14:23:20,438 INFO L195 MainTranslator]: Completed translation [2018-11-18 14:23:20,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20 WrapperNode [2018-11-18 14:23:20,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 14:23:20,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 14:23:20,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 14:23:20,439 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 14:23:20,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20" (1/1) ... [2018-11-18 14:23:20,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20" (1/1) ... [2018-11-18 14:23:20,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 14:23:20,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 14:23:20,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 14:23:20,454 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 14:23:20,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20" (1/1) ... [2018-11-18 14:23:20,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20" (1/1) ... [2018-11-18 14:23:20,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20" (1/1) ... [2018-11-18 14:23:20,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20" (1/1) ... [2018-11-18 14:23:20,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20" (1/1) ... [2018-11-18 14:23:20,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20" (1/1) ... [2018-11-18 14:23:20,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20" (1/1) ... [2018-11-18 14:23:20,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 14:23:20,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 14:23:20,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 14:23:20,470 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 14:23:20,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/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 14:23:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 14:23:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 14:23:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure mlog [2018-11-18 14:23:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure mlog [2018-11-18 14:23:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 14:23:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 14:23:20,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 14:23:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 14:23:20,653 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 14:23:20,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:23:20 BoogieIcfgContainer [2018-11-18 14:23:20,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 14:23:20,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 14:23:20,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 14:23:20,657 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 14:23:20,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:23:20" (1/3) ... [2018-11-18 14:23:20,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11746452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:23:20, skipping insertion in model container [2018-11-18 14:23:20,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:23:20" (2/3) ... [2018-11-18 14:23:20,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11746452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:23:20, skipping insertion in model container [2018-11-18 14:23:20,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:23:20" (3/3) ... [2018-11-18 14:23:20,659 INFO L112 eAbstractionObserver]: Analyzing ICFG java_LogBuiltIn_true-termination_true-no-overflow.c [2018-11-18 14:23:20,665 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 14:23:20,670 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-11-18 14:23:20,680 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-11-18 14:23:20,700 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 14:23:20,700 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 14:23:20,700 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 14:23:20,700 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 14:23:20,700 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 14:23:20,700 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 14:23:20,700 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 14:23:20,701 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 14:23:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-11-18 14:23:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 14:23:20,717 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:20,718 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:20,719 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:20,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:20,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1166998001, now seen corresponding path program 1 times [2018-11-18 14:23:20,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:20,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:20,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:20,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:20,754 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:20,863 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 14:23:20,864 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 14:23:20,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 14:23:20,864 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 14:23:20,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 14:23:20,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 14:23:20,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 14:23:20,877 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2018-11-18 14:23:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:20,943 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-11-18 14:23:20,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 14:23:20,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-11-18 14:23:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:20,949 INFO L225 Difference]: With dead ends: 33 [2018-11-18 14:23:20,950 INFO L226 Difference]: Without dead ends: 15 [2018-11-18 14:23:20,952 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-18 14:23:20,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-18 14:23:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-18 14:23:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-18 14:23:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-18 14:23:20,973 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-11-18 14:23:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:20,973 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-18 14:23:20,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 14:23:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-18 14:23:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-18 14:23:20,978 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:20,978 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:20,978 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:20,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:20,979 INFO L82 PathProgramCache]: Analyzing trace with hash -498613263, now seen corresponding path program 1 times [2018-11-18 14:23:20,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:20,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:20,980 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:21,020 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 14:23:21,021 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 14:23:21,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 14:23:21,021 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 14:23:21,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 14:23:21,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 14:23:21,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 14:23:21,022 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2018-11-18 14:23:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:21,064 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-18 14:23:21,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 14:23:21,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-11-18 14:23:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:21,065 INFO L225 Difference]: With dead ends: 23 [2018-11-18 14:23:21,065 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 14:23:21,066 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 14:23:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 14:23:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-11-18 14:23:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 14:23:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-18 14:23:21,070 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 12 [2018-11-18 14:23:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:21,070 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-18 14:23:21,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 14:23:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-18 14:23:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 14:23:21,071 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:21,071 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:21,071 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:21,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:21,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1722858080, now seen corresponding path program 1 times [2018-11-18 14:23:21,072 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:21,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:21,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:21,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:21,073 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:21,097 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 14:23:21,097 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 14:23:21,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 14:23:21,097 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 14:23:21,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 14:23:21,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 14:23:21,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 14:23:21,098 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 4 states. [2018-11-18 14:23:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:21,126 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-18 14:23:21,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 14:23:21,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-11-18 14:23:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:21,127 INFO L225 Difference]: With dead ends: 20 [2018-11-18 14:23:21,127 INFO L226 Difference]: Without dead ends: 19 [2018-11-18 14:23:21,128 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 14:23:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-18 14:23:21,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-18 14:23:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-18 14:23:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-11-18 14:23:21,131 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 13 [2018-11-18 14:23:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:21,131 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-11-18 14:23:21,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 14:23:21,132 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-11-18 14:23:21,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 14:23:21,132 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:21,132 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:21,133 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:21,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:21,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1384465031, now seen corresponding path program 1 times [2018-11-18 14:23:21,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:21,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:21,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:21,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:21,134 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:21,184 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 14:23:21,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:21,184 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:21,185 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-11-18 14:23:21,186 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [16], [17], [19], [28], [32], [33], [34], [36] [2018-11-18 14:23:21,208 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 14:23:21,208 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 14:23:21,341 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 14:23:21,342 INFO L272 AbstractInterpreter]: Visited 14 different actions 28 times. Merged at 6 different actions 12 times. Never widened. Performed 79 root evaluator evaluations with a maximum evaluation depth of 8. Performed 79 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 14:23:21,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:21,349 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 14:23:21,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:21,349 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/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 14:23:21,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:21,360 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 14:23:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:21,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:21,399 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 14:23:21,399 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:21,434 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 14:23:21,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:21,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-11-18 14:23:21,449 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:21,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 14:23:21,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 14:23:21,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-11-18 14:23:21,450 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-11-18 14:23:21,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:21,487 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-11-18 14:23:21,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 14:23:21,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-11-18 14:23:21,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:21,487 INFO L225 Difference]: With dead ends: 27 [2018-11-18 14:23:21,488 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 14:23:21,488 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-18 14:23:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 14:23:21,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-11-18 14:23:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 14:23:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-11-18 14:23:21,492 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 18 [2018-11-18 14:23:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:21,492 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-11-18 14:23:21,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 14:23:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-11-18 14:23:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-18 14:23:21,493 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:21,493 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:21,493 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:21,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:21,493 INFO L82 PathProgramCache]: Analyzing trace with hash 823326877, now seen corresponding path program 2 times [2018-11-18 14:23:21,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:21,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:21,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:21,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:21,494 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:21,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:21,571 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:21,571 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:21,571 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:21,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:21,572 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/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 14:23:21,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 14:23:21,582 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 14:23:21,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 14:23:21,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:21,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:21,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:21,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:21,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-11-18 14:23:21,689 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:21,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 14:23:21,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 14:23:21,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-11-18 14:23:21,690 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 8 states. [2018-11-18 14:23:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:21,758 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-11-18 14:23:21,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 14:23:21,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2018-11-18 14:23:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:21,759 INFO L225 Difference]: With dead ends: 33 [2018-11-18 14:23:21,759 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 14:23:21,759 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-11-18 14:23:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 14:23:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-11-18 14:23:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-18 14:23:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-11-18 14:23:21,763 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2018-11-18 14:23:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:21,763 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-11-18 14:23:21,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 14:23:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-11-18 14:23:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-18 14:23:21,764 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:21,764 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:21,765 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:21,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1808352819, now seen corresponding path program 3 times [2018-11-18 14:23:21,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:21,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:21,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:21,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:21,766 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:21,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:21,867 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:21,867 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:21,867 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:21,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:21,867 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/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 14:23:21,880 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 14:23:21,880 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 14:23:21,889 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 14:23:21,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:21,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:21,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:21,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:21,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-11-18 14:23:21,999 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:21,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 14:23:21,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 14:23:21,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-11-18 14:23:22,000 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 10 states. [2018-11-18 14:23:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:22,056 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-11-18 14:23:22,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 14:23:22,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-11-18 14:23:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:22,057 INFO L225 Difference]: With dead ends: 39 [2018-11-18 14:23:22,057 INFO L226 Difference]: Without dead ends: 38 [2018-11-18 14:23:22,057 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2018-11-18 14:23:22,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-18 14:23:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-11-18 14:23:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 14:23:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-11-18 14:23:22,062 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 30 [2018-11-18 14:23:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:22,062 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-11-18 14:23:22,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 14:23:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-11-18 14:23:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 14:23:22,063 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:22,063 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:22,063 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:22,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:22,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2068280503, now seen corresponding path program 4 times [2018-11-18 14:23:22,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:22,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:22,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:22,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:22,065 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:22,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:22,167 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:22,167 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:22,167 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:22,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:22,167 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/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 14:23:22,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:22,176 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 14:23:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:22,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:22,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:22,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:22,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-11-18 14:23:22,315 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:22,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 14:23:22,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 14:23:22,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-11-18 14:23:22,316 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2018-11-18 14:23:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:22,366 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-11-18 14:23:22,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 14:23:22,366 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2018-11-18 14:23:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:22,367 INFO L225 Difference]: With dead ends: 45 [2018-11-18 14:23:22,367 INFO L226 Difference]: Without dead ends: 44 [2018-11-18 14:23:22,368 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2018-11-18 14:23:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-18 14:23:22,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-11-18 14:23:22,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-18 14:23:22,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-11-18 14:23:22,372 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 36 [2018-11-18 14:23:22,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:22,373 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-11-18 14:23:22,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 14:23:22,373 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-11-18 14:23:22,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 14:23:22,374 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:22,374 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:22,374 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:22,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:22,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2010568737, now seen corresponding path program 5 times [2018-11-18 14:23:22,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:22,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:22,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:22,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:22,376 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:22,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:22,472 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:22,472 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:22,473 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:22,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:22,473 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/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 14:23:22,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 14:23:22,484 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 14:23:22,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 14:23:22,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:22,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:22,504 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:22,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:22,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2018-11-18 14:23:22,634 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:22,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 14:23:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 14:23:22,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-11-18 14:23:22,635 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 14 states. [2018-11-18 14:23:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:22,730 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-11-18 14:23:22,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 14:23:22,731 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2018-11-18 14:23:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:22,731 INFO L225 Difference]: With dead ends: 51 [2018-11-18 14:23:22,731 INFO L226 Difference]: Without dead ends: 50 [2018-11-18 14:23:22,732 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2018-11-18 14:23:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-18 14:23:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-11-18 14:23:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-18 14:23:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-11-18 14:23:22,736 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 42 [2018-11-18 14:23:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:22,736 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-11-18 14:23:22,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 14:23:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-11-18 14:23:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-18 14:23:22,737 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:22,737 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:22,737 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:22,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:22,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2103739403, now seen corresponding path program 6 times [2018-11-18 14:23:22,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:22,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:22,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:22,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:22,739 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:22,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:22,824 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:22,824 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:22,824 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:22,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:22,824 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:22,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 14:23:22,830 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 14:23:22,844 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 14:23:22,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:22,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:22,854 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:23,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:23,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2018-11-18 14:23:23,018 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:23,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 14:23:23,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 14:23:23,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-11-18 14:23:23,019 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 16 states. [2018-11-18 14:23:23,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:23,099 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-11-18 14:23:23,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 14:23:23,099 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2018-11-18 14:23:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:23,100 INFO L225 Difference]: With dead ends: 57 [2018-11-18 14:23:23,100 INFO L226 Difference]: Without dead ends: 56 [2018-11-18 14:23:23,100 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=428, Invalid=904, Unknown=0, NotChecked=0, Total=1332 [2018-11-18 14:23:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-18 14:23:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2018-11-18 14:23:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-18 14:23:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-11-18 14:23:23,105 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 48 [2018-11-18 14:23:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:23,105 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-11-18 14:23:23,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 14:23:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-11-18 14:23:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-18 14:23:23,106 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:23,106 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:23,106 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:23,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1992812427, now seen corresponding path program 7 times [2018-11-18 14:23:23,107 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:23,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:23,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:23,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:23,108 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:23,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:23,236 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:23,236 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:23,236 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:23,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:23,236 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:23,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:23,242 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 14:23:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:23,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:23,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:23,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:23,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2018-11-18 14:23:23,438 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:23,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 14:23:23,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 14:23:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 14:23:23,439 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 18 states. [2018-11-18 14:23:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:23,522 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-11-18 14:23:23,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 14:23:23,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2018-11-18 14:23:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:23,523 INFO L225 Difference]: With dead ends: 63 [2018-11-18 14:23:23,523 INFO L226 Difference]: Without dead ends: 62 [2018-11-18 14:23:23,524 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=549, Invalid=1173, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 14:23:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-18 14:23:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2018-11-18 14:23:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-18 14:23:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-11-18 14:23:23,527 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 54 [2018-11-18 14:23:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:23,528 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-11-18 14:23:23,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 14:23:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-11-18 14:23:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-18 14:23:23,528 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:23,528 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:23,528 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:23,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash -744568159, now seen corresponding path program 8 times [2018-11-18 14:23:23,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:23,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:23,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:23,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:23,529 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:23,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:23,680 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:23,680 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:23,680 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:23,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:23,680 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:23,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 14:23:23,688 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 14:23:23,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-18 14:23:23,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:23,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:23,714 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:23,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:23,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2018-11-18 14:23:23,944 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:23,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 14:23:23,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 14:23:23,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 14:23:23,946 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 20 states. [2018-11-18 14:23:24,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:24,095 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-11-18 14:23:24,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 14:23:24,095 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-11-18 14:23:24,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:24,096 INFO L225 Difference]: With dead ends: 69 [2018-11-18 14:23:24,096 INFO L226 Difference]: Without dead ends: 68 [2018-11-18 14:23:24,096 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=685, Invalid=1477, Unknown=0, NotChecked=0, Total=2162 [2018-11-18 14:23:24,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-18 14:23:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2018-11-18 14:23:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-18 14:23:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-11-18 14:23:24,102 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 60 [2018-11-18 14:23:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:24,102 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-11-18 14:23:24,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 14:23:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-11-18 14:23:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-18 14:23:24,103 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:24,103 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:24,104 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:24,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:24,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1783137591, now seen corresponding path program 9 times [2018-11-18 14:23:24,104 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:24,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:24,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:24,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:24,108 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:24,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:24,272 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:24,272 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:24,272 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:24,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:24,272 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:24,279 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 14:23:24,279 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 14:23:24,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 14:23:24,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:24,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:24,304 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:24,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:24,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2018-11-18 14:23:24,554 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:24,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-18 14:23:24,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-18 14:23:24,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 14:23:24,555 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 22 states. [2018-11-18 14:23:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:24,660 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-11-18 14:23:24,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 14:23:24,661 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 66 [2018-11-18 14:23:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:24,662 INFO L225 Difference]: With dead ends: 75 [2018-11-18 14:23:24,662 INFO L226 Difference]: Without dead ends: 74 [2018-11-18 14:23:24,663 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=836, Invalid=1816, Unknown=0, NotChecked=0, Total=2652 [2018-11-18 14:23:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-18 14:23:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-11-18 14:23:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-18 14:23:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-11-18 14:23:24,668 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 66 [2018-11-18 14:23:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:24,669 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-11-18 14:23:24,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-18 14:23:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-11-18 14:23:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-18 14:23:24,671 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:24,671 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:24,671 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:24,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:24,672 INFO L82 PathProgramCache]: Analyzing trace with hash -467306675, now seen corresponding path program 10 times [2018-11-18 14:23:24,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:24,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:24,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:24,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:24,673 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:24,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:24,849 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:24,849 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:24,849 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:24,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:24,849 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:24,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:24,856 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 14:23:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:24,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:24,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:25,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:25,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2018-11-18 14:23:25,213 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:25,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 14:23:25,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 14:23:25,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-11-18 14:23:25,214 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 24 states. [2018-11-18 14:23:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:25,330 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-11-18 14:23:25,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-18 14:23:25,331 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2018-11-18 14:23:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:25,332 INFO L225 Difference]: With dead ends: 81 [2018-11-18 14:23:25,332 INFO L226 Difference]: Without dead ends: 80 [2018-11-18 14:23:25,332 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1002, Invalid=2190, Unknown=0, NotChecked=0, Total=3192 [2018-11-18 14:23:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-18 14:23:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2018-11-18 14:23:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-18 14:23:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-11-18 14:23:25,337 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 72 [2018-11-18 14:23:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:25,338 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-11-18 14:23:25,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-18 14:23:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-11-18 14:23:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-11-18 14:23:25,339 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:25,339 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:25,339 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:25,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1194458909, now seen corresponding path program 11 times [2018-11-18 14:23:25,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:25,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:25,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:25,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:25,340 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:25,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:25,514 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:25,514 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:25,514 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:25,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:25,514 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:25,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 14:23:25,522 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 14:23:25,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-18 14:23:25,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:25,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:25,588 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:26,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:26,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2018-11-18 14:23:26,060 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:26,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-18 14:23:26,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 14:23:26,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-11-18 14:23:26,060 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 26 states. [2018-11-18 14:23:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:26,180 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-11-18 14:23:26,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-18 14:23:26,180 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 78 [2018-11-18 14:23:26,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:26,181 INFO L225 Difference]: With dead ends: 87 [2018-11-18 14:23:26,181 INFO L226 Difference]: Without dead ends: 86 [2018-11-18 14:23:26,181 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1183, Invalid=2599, Unknown=0, NotChecked=0, Total=3782 [2018-11-18 14:23:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-18 14:23:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2018-11-18 14:23:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-18 14:23:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-11-18 14:23:26,186 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 78 [2018-11-18 14:23:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:26,187 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-11-18 14:23:26,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-18 14:23:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-11-18 14:23:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-11-18 14:23:26,188 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:26,188 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:26,188 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:26,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:26,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1542290951, now seen corresponding path program 12 times [2018-11-18 14:23:26,188 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:26,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:26,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:26,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:26,192 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:26,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:26,396 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:26,396 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:26,396 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:26,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:26,396 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:26,403 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 14:23:26,404 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 14:23:26,431 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 14:23:26,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:26,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:26,445 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:26,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:26,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2018-11-18 14:23:26,846 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:26,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-18 14:23:26,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-18 14:23:26,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-11-18 14:23:26,848 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 28 states. [2018-11-18 14:23:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:27,010 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-11-18 14:23:27,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-18 14:23:27,010 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 84 [2018-11-18 14:23:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:27,011 INFO L225 Difference]: With dead ends: 93 [2018-11-18 14:23:27,011 INFO L226 Difference]: Without dead ends: 92 [2018-11-18 14:23:27,012 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1379, Invalid=3043, Unknown=0, NotChecked=0, Total=4422 [2018-11-18 14:23:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-18 14:23:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2018-11-18 14:23:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-18 14:23:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-11-18 14:23:27,016 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 84 [2018-11-18 14:23:27,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:27,016 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-11-18 14:23:27,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-18 14:23:27,016 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-11-18 14:23:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-11-18 14:23:27,017 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:27,017 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:27,018 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:27,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:27,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1678026097, now seen corresponding path program 13 times [2018-11-18 14:23:27,018 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:27,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:27,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:27,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:27,019 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:27,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:27,233 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:27,233 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:27,234 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:27,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:27,234 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:27,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:27,240 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 14:23:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:27,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:27,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:27,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:27,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2018-11-18 14:23:27,664 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:27,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-18 14:23:27,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-18 14:23:27,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-11-18 14:23:27,665 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 30 states. [2018-11-18 14:23:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:27,823 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-11-18 14:23:27,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-18 14:23:27,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 90 [2018-11-18 14:23:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:27,824 INFO L225 Difference]: With dead ends: 99 [2018-11-18 14:23:27,824 INFO L226 Difference]: Without dead ends: 98 [2018-11-18 14:23:27,825 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2018-11-18 14:23:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-11-18 14:23:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-11-18 14:23:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-18 14:23:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-11-18 14:23:27,828 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 90 [2018-11-18 14:23:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:27,828 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-11-18 14:23:27,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-18 14:23:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-11-18 14:23:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-18 14:23:27,830 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:27,830 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:27,831 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:27,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:27,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1187572389, now seen corresponding path program 14 times [2018-11-18 14:23:27,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:27,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:27,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:27,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:27,832 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:28,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:28,064 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:28,064 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:28,064 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:28,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:28,064 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:28,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 14:23:28,074 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 14:23:28,128 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-11-18 14:23:28,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:28,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:28,139 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:28,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:28,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2018-11-18 14:23:28,673 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:28,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-18 14:23:28,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-18 14:23:28,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-11-18 14:23:28,674 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 32 states. [2018-11-18 14:23:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:28,829 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-11-18 14:23:28,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-18 14:23:28,829 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 96 [2018-11-18 14:23:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:28,830 INFO L225 Difference]: With dead ends: 105 [2018-11-18 14:23:28,830 INFO L226 Difference]: Without dead ends: 104 [2018-11-18 14:23:28,831 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1816, Invalid=4036, Unknown=0, NotChecked=0, Total=5852 [2018-11-18 14:23:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-11-18 14:23:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2018-11-18 14:23:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-11-18 14:23:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-11-18 14:23:28,835 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 96 [2018-11-18 14:23:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:28,835 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-11-18 14:23:28,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-18 14:23:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-11-18 14:23:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-18 14:23:28,836 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:28,836 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:28,836 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:28,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:28,836 INFO L82 PathProgramCache]: Analyzing trace with hash -252472773, now seen corresponding path program 15 times [2018-11-18 14:23:28,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:28,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:28,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:28,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:28,837 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:29,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:29,122 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:29,122 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:29,122 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:29,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:29,122 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:29,129 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 14:23:29,129 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 14:23:29,146 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 14:23:29,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:29,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:29,156 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:29,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:29,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2018-11-18 14:23:29,699 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:29,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-18 14:23:29,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-18 14:23:29,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-11-18 14:23:29,700 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 34 states. [2018-11-18 14:23:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:29,858 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-11-18 14:23:29,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-18 14:23:29,858 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 102 [2018-11-18 14:23:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:29,859 INFO L225 Difference]: With dead ends: 111 [2018-11-18 14:23:29,859 INFO L226 Difference]: Without dead ends: 110 [2018-11-18 14:23:29,860 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2057, Invalid=4585, Unknown=0, NotChecked=0, Total=6642 [2018-11-18 14:23:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-11-18 14:23:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2018-11-18 14:23:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-18 14:23:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-11-18 14:23:29,862 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 102 [2018-11-18 14:23:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:29,862 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-11-18 14:23:29,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-18 14:23:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-11-18 14:23:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-18 14:23:29,863 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:29,863 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:29,863 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:29,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:29,863 INFO L82 PathProgramCache]: Analyzing trace with hash 53195089, now seen corresponding path program 16 times [2018-11-18 14:23:29,863 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:29,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:29,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:29,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:29,864 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:30,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:30,154 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:30,154 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:30,154 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:30,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:30,154 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:30,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:30,160 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 14:23:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:30,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:30,186 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:30,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:30,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2018-11-18 14:23:30,754 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:30,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-18 14:23:30,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-18 14:23:30,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-11-18 14:23:30,755 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 36 states. [2018-11-18 14:23:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:30,933 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-11-18 14:23:30,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-18 14:23:30,933 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 108 [2018-11-18 14:23:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:30,934 INFO L225 Difference]: With dead ends: 117 [2018-11-18 14:23:30,934 INFO L226 Difference]: Without dead ends: 116 [2018-11-18 14:23:30,935 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2313, Invalid=5169, Unknown=0, NotChecked=0, Total=7482 [2018-11-18 14:23:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-11-18 14:23:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2018-11-18 14:23:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-11-18 14:23:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-11-18 14:23:30,938 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 108 [2018-11-18 14:23:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:30,939 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-11-18 14:23:30,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-18 14:23:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-11-18 14:23:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-11-18 14:23:30,939 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:30,939 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:30,940 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:30,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:30,940 INFO L82 PathProgramCache]: Analyzing trace with hash -128342041, now seen corresponding path program 17 times [2018-11-18 14:23:30,940 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:30,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:30,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:30,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:30,941 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:31,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:31,271 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:31,271 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:31,271 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:31,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:31,271 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:31,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 14:23:31,278 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 14:23:31,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-18 14:23:31,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:31,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:31,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:31,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:31,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2018-11-18 14:23:31,999 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:31,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-18 14:23:32,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-18 14:23:32,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-11-18 14:23:32,000 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 38 states. [2018-11-18 14:23:32,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:32,196 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-11-18 14:23:32,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-18 14:23:32,196 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 114 [2018-11-18 14:23:32,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:32,196 INFO L225 Difference]: With dead ends: 123 [2018-11-18 14:23:32,196 INFO L226 Difference]: Without dead ends: 122 [2018-11-18 14:23:32,197 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2584, Invalid=5788, Unknown=0, NotChecked=0, Total=8372 [2018-11-18 14:23:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-11-18 14:23:32,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-11-18 14:23:32,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-18 14:23:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-11-18 14:23:32,200 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 114 [2018-11-18 14:23:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:32,200 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-11-18 14:23:32,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-18 14:23:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-11-18 14:23:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-11-18 14:23:32,200 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:32,200 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:32,200 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:32,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash -744630787, now seen corresponding path program 18 times [2018-11-18 14:23:32,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:32,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:32,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:32,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:32,201 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:32,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:32,519 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:32,519 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:32,519 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:32,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:32,519 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:32,526 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 14:23:32,526 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 14:23:32,546 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 14:23:32,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:32,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:32,559 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:33,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:33,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 77 [2018-11-18 14:23:33,333 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:33,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-18 14:23:33,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-18 14:23:33,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-11-18 14:23:33,334 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 40 states. [2018-11-18 14:23:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:33,561 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-11-18 14:23:33,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-18 14:23:33,561 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 120 [2018-11-18 14:23:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:33,562 INFO L225 Difference]: With dead ends: 129 [2018-11-18 14:23:33,562 INFO L226 Difference]: Without dead ends: 128 [2018-11-18 14:23:33,563 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2870, Invalid=6442, Unknown=0, NotChecked=0, Total=9312 [2018-11-18 14:23:33,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-11-18 14:23:33,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2018-11-18 14:23:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-18 14:23:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-11-18 14:23:33,568 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 120 [2018-11-18 14:23:33,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:33,568 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-11-18 14:23:33,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-18 14:23:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-11-18 14:23:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-18 14:23:33,569 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:33,569 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:33,569 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:33,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:33,569 INFO L82 PathProgramCache]: Analyzing trace with hash 374381459, now seen corresponding path program 19 times [2018-11-18 14:23:33,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:33,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:33,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:33,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:33,570 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:33,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:33,926 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:33,926 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:33,927 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:33,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:33,927 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:33,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:33,934 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 14:23:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:33,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:33,967 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:34,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:34,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2018-11-18 14:23:34,769 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:34,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-18 14:23:34,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-18 14:23:34,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-11-18 14:23:34,770 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 42 states. [2018-11-18 14:23:35,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:35,028 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-11-18 14:23:35,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-18 14:23:35,028 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 126 [2018-11-18 14:23:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:35,029 INFO L225 Difference]: With dead ends: 135 [2018-11-18 14:23:35,029 INFO L226 Difference]: Without dead ends: 134 [2018-11-18 14:23:35,030 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3171, Invalid=7131, Unknown=0, NotChecked=0, Total=10302 [2018-11-18 14:23:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-18 14:23:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2018-11-18 14:23:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-18 14:23:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-11-18 14:23:35,032 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 126 [2018-11-18 14:23:35,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:35,032 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-11-18 14:23:35,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-18 14:23:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-11-18 14:23:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-18 14:23:35,032 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:35,032 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:35,033 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:35,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:35,033 INFO L82 PathProgramCache]: Analyzing trace with hash 906123433, now seen corresponding path program 20 times [2018-11-18 14:23:35,033 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:35,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:35,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:35,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:35,034 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:35,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:35,455 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:35,455 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:35,455 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:35,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:35,455 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:35,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 14:23:35,462 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 14:23:35,513 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-11-18 14:23:35,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:35,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:35,527 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:36,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:36,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 85 [2018-11-18 14:23:36,373 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:36,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-18 14:23:36,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-18 14:23:36,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-11-18 14:23:36,374 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 44 states. [2018-11-18 14:23:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:36,654 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-11-18 14:23:36,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-18 14:23:36,655 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 132 [2018-11-18 14:23:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:36,655 INFO L225 Difference]: With dead ends: 141 [2018-11-18 14:23:36,655 INFO L226 Difference]: Without dead ends: 140 [2018-11-18 14:23:36,656 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3487, Invalid=7855, Unknown=0, NotChecked=0, Total=11342 [2018-11-18 14:23:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-11-18 14:23:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2018-11-18 14:23:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-18 14:23:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-11-18 14:23:36,659 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 132 [2018-11-18 14:23:36,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:36,659 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-11-18 14:23:36,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-18 14:23:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-11-18 14:23:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-11-18 14:23:36,660 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:36,660 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:36,660 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:36,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:36,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1837404865, now seen corresponding path program 21 times [2018-11-18 14:23:36,660 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:36,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:36,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:36,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:36,661 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:37,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:37,110 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:37,111 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:37,111 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:37,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:37,111 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:37,117 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 14:23:37,117 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 14:23:37,137 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 14:23:37,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:37,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:37,151 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:38,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:38,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 89 [2018-11-18 14:23:38,075 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:38,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-18 14:23:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-18 14:23:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-11-18 14:23:38,076 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 46 states. [2018-11-18 14:23:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:38,370 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-11-18 14:23:38,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-18 14:23:38,371 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 138 [2018-11-18 14:23:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:38,371 INFO L225 Difference]: With dead ends: 147 [2018-11-18 14:23:38,371 INFO L226 Difference]: Without dead ends: 146 [2018-11-18 14:23:38,372 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3818, Invalid=8614, Unknown=0, NotChecked=0, Total=12432 [2018-11-18 14:23:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-11-18 14:23:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-11-18 14:23:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-11-18 14:23:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-11-18 14:23:38,376 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 138 [2018-11-18 14:23:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:38,376 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-11-18 14:23:38,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-18 14:23:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-11-18 14:23:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-11-18 14:23:38,377 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:38,377 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:38,377 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:38,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:38,378 INFO L82 PathProgramCache]: Analyzing trace with hash -339986091, now seen corresponding path program 22 times [2018-11-18 14:23:38,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:38,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:38,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:38,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:38,378 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:38,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:38,842 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:38,843 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:38,843 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:38,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:38,843 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:38,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:38,850 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 14:23:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:38,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:38,885 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:39,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:39,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2018-11-18 14:23:39,883 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:39,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-18 14:23:39,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-18 14:23:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-11-18 14:23:39,884 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 48 states. [2018-11-18 14:23:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:40,182 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-11-18 14:23:40,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-18 14:23:40,183 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 144 [2018-11-18 14:23:40,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:40,183 INFO L225 Difference]: With dead ends: 153 [2018-11-18 14:23:40,183 INFO L226 Difference]: Without dead ends: 152 [2018-11-18 14:23:40,184 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4164, Invalid=9408, Unknown=0, NotChecked=0, Total=13572 [2018-11-18 14:23:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-11-18 14:23:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2018-11-18 14:23:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-11-18 14:23:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-11-18 14:23:40,188 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 144 [2018-11-18 14:23:40,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:40,188 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-11-18 14:23:40,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-18 14:23:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-11-18 14:23:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-18 14:23:40,189 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:40,189 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:40,190 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:40,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:40,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1476205803, now seen corresponding path program 23 times [2018-11-18 14:23:40,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:40,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:40,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:40,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:40,191 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 0 proven. 1633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:40,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:40,661 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:40,661 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:40,661 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:40,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:40,661 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:40,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 14:23:40,669 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 14:23:40,728 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-11-18 14:23:40,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:40,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 0 proven. 1633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:40,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 0 proven. 1633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:41,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:41,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2018-11-18 14:23:41,833 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:41,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-18 14:23:41,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-18 14:23:41,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-11-18 14:23:41,834 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 50 states. [2018-11-18 14:23:42,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:42,171 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-11-18 14:23:42,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-18 14:23:42,171 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 150 [2018-11-18 14:23:42,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:42,172 INFO L225 Difference]: With dead ends: 159 [2018-11-18 14:23:42,172 INFO L226 Difference]: Without dead ends: 158 [2018-11-18 14:23:42,173 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4525, Invalid=10237, Unknown=0, NotChecked=0, Total=14762 [2018-11-18 14:23:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-11-18 14:23:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2018-11-18 14:23:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-11-18 14:23:42,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-11-18 14:23:42,176 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 150 [2018-11-18 14:23:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:42,176 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-11-18 14:23:42,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-18 14:23:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-11-18 14:23:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-11-18 14:23:42,177 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:42,177 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:42,177 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:42,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:42,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1179748351, now seen corresponding path program 24 times [2018-11-18 14:23:42,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:42,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:42,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:42,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:42,178 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:42,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:42,706 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:42,706 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:42,706 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:42,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:42,706 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:42,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 14:23:42,712 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 14:23:42,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 14:23:42,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:42,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:42,752 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:43,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:43,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2018-11-18 14:23:43,924 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:43,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-18 14:23:43,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-18 14:23:43,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-11-18 14:23:43,925 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 52 states. [2018-11-18 14:23:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:44,281 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-11-18 14:23:44,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-18 14:23:44,281 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 156 [2018-11-18 14:23:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:44,282 INFO L225 Difference]: With dead ends: 165 [2018-11-18 14:23:44,282 INFO L226 Difference]: Without dead ends: 164 [2018-11-18 14:23:44,283 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3277 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4901, Invalid=11101, Unknown=0, NotChecked=0, Total=16002 [2018-11-18 14:23:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-11-18 14:23:44,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2018-11-18 14:23:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-11-18 14:23:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-11-18 14:23:44,285 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 156 [2018-11-18 14:23:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:44,285 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-11-18 14:23:44,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-18 14:23:44,286 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-11-18 14:23:44,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-11-18 14:23:44,286 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:44,286 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:44,286 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:44,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:44,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1250383209, now seen corresponding path program 25 times [2018-11-18 14:23:44,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:44,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:44,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:44,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:44,287 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 0 proven. 1925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:44,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:44,869 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:44,869 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:44,869 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:44,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:44,869 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:44,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:44,876 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 14:23:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:44,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 0 proven. 1925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:44,917 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 0 proven. 1925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:46,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:46,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2018-11-18 14:23:46,229 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:46,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-11-18 14:23:46,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-11-18 14:23:46,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-11-18 14:23:46,230 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 54 states. [2018-11-18 14:23:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:46,596 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-11-18 14:23:46,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-18 14:23:46,596 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 162 [2018-11-18 14:23:46,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:46,597 INFO L225 Difference]: With dead ends: 171 [2018-11-18 14:23:46,597 INFO L226 Difference]: Without dead ends: 170 [2018-11-18 14:23:46,597 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5292, Invalid=12000, Unknown=0, NotChecked=0, Total=17292 [2018-11-18 14:23:46,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-11-18 14:23:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2018-11-18 14:23:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-11-18 14:23:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-11-18 14:23:46,600 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 162 [2018-11-18 14:23:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:46,600 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-11-18 14:23:46,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-11-18 14:23:46,600 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-11-18 14:23:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-11-18 14:23:46,601 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:46,601 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:46,601 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:46,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:46,601 INFO L82 PathProgramCache]: Analyzing trace with hash 675026093, now seen corresponding path program 26 times [2018-11-18 14:23:46,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:46,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:46,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:46,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:46,601 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:47,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:47,196 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:47,196 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:47,196 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:47,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:47,196 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:47,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 14:23:47,203 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 14:23:47,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-11-18 14:23:47,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:47,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:47,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:48,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:48,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 109 [2018-11-18 14:23:48,853 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:48,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-18 14:23:48,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-18 14:23:48,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-11-18 14:23:48,854 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 56 states. [2018-11-18 14:23:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:49,251 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-11-18 14:23:49,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-18 14:23:49,251 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 168 [2018-11-18 14:23:49,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:49,252 INFO L225 Difference]: With dead ends: 177 [2018-11-18 14:23:49,252 INFO L226 Difference]: Without dead ends: 176 [2018-11-18 14:23:49,253 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3836 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5698, Invalid=12934, Unknown=0, NotChecked=0, Total=18632 [2018-11-18 14:23:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-11-18 14:23:49,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2018-11-18 14:23:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-11-18 14:23:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-11-18 14:23:49,257 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 168 [2018-11-18 14:23:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:49,257 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-11-18 14:23:49,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-18 14:23:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-11-18 14:23:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-18 14:23:49,258 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:49,258 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:49,258 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:49,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash 487659075, now seen corresponding path program 27 times [2018-11-18 14:23:49,258 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:49,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:49,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:49,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:49,259 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 0 proven. 2241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:49,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:49,901 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:49,901 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:49,901 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:49,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:49,901 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:49,908 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 14:23:49,908 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 14:23:49,948 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 14:23:49,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:49,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 0 proven. 2241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:49,978 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 0 proven. 2241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:51,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:51,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 113 [2018-11-18 14:23:51,415 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:51,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-11-18 14:23:51,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-11-18 14:23:51,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-11-18 14:23:51,417 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 58 states. [2018-11-18 14:23:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:51,947 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-11-18 14:23:51,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-18 14:23:51,948 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 174 [2018-11-18 14:23:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:51,949 INFO L225 Difference]: With dead ends: 183 [2018-11-18 14:23:51,949 INFO L226 Difference]: Without dead ends: 182 [2018-11-18 14:23:51,949 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6119, Invalid=13903, Unknown=0, NotChecked=0, Total=20022 [2018-11-18 14:23:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-11-18 14:23:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2018-11-18 14:23:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-11-18 14:23:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-11-18 14:23:51,955 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 174 [2018-11-18 14:23:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:51,956 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-11-18 14:23:51,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-11-18 14:23:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-11-18 14:23:51,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-11-18 14:23:51,956 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:51,957 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:51,957 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:51,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:51,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1128795993, now seen corresponding path program 28 times [2018-11-18 14:23:51,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:51,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:51,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:51,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:51,958 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:52,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:52,753 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:52,754 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:52,754 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:52,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:52,754 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:52,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:52,761 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 14:23:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:52,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:52,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:54,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:54,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 117 [2018-11-18 14:23:54,414 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:54,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-18 14:23:54,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-18 14:23:54,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-11-18 14:23:54,415 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 60 states. [2018-11-18 14:23:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:54,880 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-11-18 14:23:54,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-18 14:23:54,880 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 180 [2018-11-18 14:23:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:54,881 INFO L225 Difference]: With dead ends: 189 [2018-11-18 14:23:54,881 INFO L226 Difference]: Without dead ends: 188 [2018-11-18 14:23:54,882 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4439 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6555, Invalid=14907, Unknown=0, NotChecked=0, Total=21462 [2018-11-18 14:23:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-11-18 14:23:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2018-11-18 14:23:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-11-18 14:23:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-11-18 14:23:54,886 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 180 [2018-11-18 14:23:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:54,886 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-11-18 14:23:54,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-18 14:23:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-11-18 14:23:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-18 14:23:54,887 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:54,887 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:54,887 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:54,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:54,888 INFO L82 PathProgramCache]: Analyzing trace with hash -462856209, now seen corresponding path program 29 times [2018-11-18 14:23:54,888 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:54,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:54,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:23:54,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:54,889 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 0 proven. 2581 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:55,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:55,729 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:23:55,729 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:23:55,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:23:55,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:23:55,729 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:23:55,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 14:23:55,737 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 14:23:55,830 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-11-18 14:23:55,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:23:55,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:23:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 0 proven. 2581 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:55,852 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:23:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 0 proven. 2581 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:57,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:23:57,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 121 [2018-11-18 14:23:57,509 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:23:57,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-18 14:23:57,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-18 14:23:57,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-11-18 14:23:57,510 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 62 states. [2018-11-18 14:23:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:23:57,981 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-11-18 14:23:57,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-11-18 14:23:57,981 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 186 [2018-11-18 14:23:57,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:23:57,982 INFO L225 Difference]: With dead ends: 195 [2018-11-18 14:23:57,982 INFO L226 Difference]: Without dead ends: 194 [2018-11-18 14:23:57,983 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4757 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7006, Invalid=15946, Unknown=0, NotChecked=0, Total=22952 [2018-11-18 14:23:57,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-11-18 14:23:57,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2018-11-18 14:23:57,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-11-18 14:23:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-11-18 14:23:57,987 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 186 [2018-11-18 14:23:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:23:57,988 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-11-18 14:23:57,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-18 14:23:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-11-18 14:23:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-11-18 14:23:57,989 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:23:57,989 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:23:57,989 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 14:23:57,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:23:57,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1513449477, now seen corresponding path program 30 times [2018-11-18 14:23:57,989 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:23:57,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:57,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:23:57,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:23:57,990 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:23:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:23:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 2760 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:23:59,860 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 14:23:59,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2018-11-18 14:23:59,860 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 14:23:59,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-11-18 14:23:59,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-11-18 14:23:59,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=6013, Unknown=0, NotChecked=0, Total=8930 [2018-11-18 14:23:59,861 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 95 states. [2018-11-18 14:24:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:24:00,622 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-11-18 14:24:00,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-11-18 14:24:00,622 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 192 [2018-11-18 14:24:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:24:00,623 INFO L225 Difference]: With dead ends: 196 [2018-11-18 14:24:00,623 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 14:24:00,625 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6614 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6850, Invalid=17330, Unknown=0, NotChecked=0, Total=24180 [2018-11-18 14:24:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 14:24:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 14:24:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 14:24:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 14:24:00,625 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 192 [2018-11-18 14:24:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:24:00,625 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 14:24:00,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-11-18 14:24:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 14:24:00,625 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 14:24:00,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 14:24:00,994 WARN L180 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 158 [2018-11-18 14:24:00,998 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 14:24:00,998 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 14:24:00,998 INFO L425 ceAbstractionStarter]: For program point mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2018-11-18 14:24:00,998 INFO L425 ceAbstractionStarter]: For program point mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2018-11-18 14:24:00,998 INFO L425 ceAbstractionStarter]: For program point mlogFINAL(lines 3 16) no Hoare annotation was computed. [2018-11-18 14:24:00,998 INFO L425 ceAbstractionStarter]: For program point mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 9) no Hoare annotation was computed. [2018-11-18 14:24:00,998 INFO L425 ceAbstractionStarter]: For program point mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 9) no Hoare annotation was computed. [2018-11-18 14:24:00,998 INFO L425 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-11-18 14:24:00,999 INFO L425 ceAbstractionStarter]: For program point L9(line 9) no Hoare annotation was computed. [2018-11-18 14:24:00,999 INFO L425 ceAbstractionStarter]: For program point L10-1(line 10) no Hoare annotation was computed. [2018-11-18 14:24:00,999 INFO L425 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2018-11-18 14:24:00,999 INFO L425 ceAbstractionStarter]: For program point L7-1(lines 7 12) no Hoare annotation was computed. [2018-11-18 14:24:00,999 INFO L425 ceAbstractionStarter]: For program point mlogEXIT(lines 3 16) no Hoare annotation was computed. [2018-11-18 14:24:00,999 INFO L421 ceAbstractionStarter]: At program point L7-3(lines 7 12) the Hoare annotation is: (let ((.cse1 (div mlog_~x 2)) (.cse0 (< 0 (+ mlog_~x 1))) (.cse2 (<= 0 mlog_~res~0))) (or (and (<= mlog_~res~0 22) .cse0 (<= .cse1 255) .cse2) (and (<= mlog_~res~0 19) .cse0 (<= .cse1 2047) .cse2) (and (<= .cse1 16777215) .cse0 (<= mlog_~res~0 6) .cse2) (< 2147483647 |mlog_#in~x|) (and (<= mlog_~x 2147483647) (<= mlog_~res~0 0) .cse2) (and (<= .cse1 7) .cse0 (<= mlog_~res~0 27) .cse2) (and .cse0 (<= mlog_~res~0 8) (<= .cse1 4194303) .cse2) (and (<= mlog_~res~0 18) .cse0 .cse2 (<= .cse1 4095)) (and .cse0 (<= mlog_~res~0 13) (<= .cse1 131071) .cse2) (and (<= mlog_~res~0 20) .cse0 .cse2 (<= .cse1 1023)) (and (<= mlog_~res~0 28) .cse0 (<= .cse1 3) .cse2) (and (<= mlog_~res~0 1) .cse0 (<= .cse1 536870911) .cse2) (and .cse0 (<= mlog_~res~0 26) (<= .cse1 15) .cse2) (and .cse0 (<= mlog_~res~0 15) (<= .cse1 32767) .cse2) (and .cse0 (<= mlog_~res~0 24) .cse2 (<= .cse1 63)) (and (<= .cse1 33554431) .cse0 (<= mlog_~res~0 5) .cse2) (and (<= mlog_~res~0 3) .cse0 (<= .cse1 134217727) .cse2) (and .cse0 (<= mlog_~res~0 11) (<= .cse1 524287) .cse2) (and (<= .cse1 1048575) (<= mlog_~res~0 10) .cse0 .cse2) (and .cse0 (<= .cse1 8388607) .cse2 (<= mlog_~res~0 7)) (and .cse0 (<= .cse1 2097151) .cse2 (<= mlog_~res~0 9)) (and (<= mlog_~res~0 23) .cse0 (<= .cse1 127) .cse2) (and .cse0 (<= .cse1 67108863) (<= mlog_~res~0 4) .cse2) (and (<= mlog_~res~0 21) (<= .cse1 511) .cse0 .cse2) (and (<= mlog_~res~0 16) .cse0 .cse2 (<= .cse1 16383)) (and (<= mlog_~res~0 2) .cse0 .cse2 (<= .cse1 268435455)) (and .cse0 (<= .cse1 8191) (<= mlog_~res~0 17) .cse2) (and (<= .cse1 1) (<= mlog_~res~0 29) .cse0 .cse2) (and .cse0 .cse2 (<= mlog_~x 1)) (and (<= mlog_~res~0 25) .cse0 .cse2 (<= .cse1 31)) (and (<= .cse1 65535) .cse0 .cse2 (<= mlog_~res~0 14)) (and (<= .cse1 262143) .cse0 (<= mlog_~res~0 12) .cse2))) [2018-11-18 14:24:00,999 INFO L425 ceAbstractionStarter]: For program point L7-4(lines 7 12) no Hoare annotation was computed. [2018-11-18 14:24:01,000 INFO L428 ceAbstractionStarter]: At program point mlogENTRY(lines 3 16) the Hoare annotation is: true [2018-11-18 14:24:01,000 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 14:24:01,000 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 14:24:01,000 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 14:24:01,000 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 14:24:01,000 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 18 20) the Hoare annotation is: true [2018-11-18 14:24:01,000 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 18 20) no Hoare annotation was computed. [2018-11-18 14:24:01,000 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 18 20) no Hoare annotation was computed. [2018-11-18 14:24:01,000 INFO L421 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (<= |main_#t~nondet1| 2147483647) [2018-11-18 14:24:01,000 INFO L425 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-11-18 14:24:01,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 02:24:01 BoogieIcfgContainer [2018-11-18 14:24:01,021 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 14:24:01,022 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 14:24:01,022 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 14:24:01,022 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 14:24:01,022 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:23:20" (3/4) ... [2018-11-18 14:24:01,033 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 14:24:01,037 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 14:24:01,037 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure mlog [2018-11-18 14:24:01,037 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 14:24:01,040 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-18 14:24:01,040 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 14:24:01,040 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 14:24:01,059 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((((((((((((((((((((res <= 22 && 0 < x + 1) && x / 2 <= 255) && 0 <= res) || (((res <= 19 && 0 < x + 1) && x / 2 <= 2047) && 0 <= res)) || (((x / 2 <= 16777215 && 0 < x + 1) && res <= 6) && 0 <= res)) || 2147483647 < \old(x)) || ((x <= 2147483647 && res <= 0) && 0 <= res)) || (((x / 2 <= 7 && 0 < x + 1) && res <= 27) && 0 <= res)) || (((0 < x + 1 && res <= 8) && x / 2 <= 4194303) && 0 <= res)) || (((res <= 18 && 0 < x + 1) && 0 <= res) && x / 2 <= 4095)) || (((0 < x + 1 && res <= 13) && x / 2 <= 131071) && 0 <= res)) || (((res <= 20 && 0 < x + 1) && 0 <= res) && x / 2 <= 1023)) || (((res <= 28 && 0 < x + 1) && x / 2 <= 3) && 0 <= res)) || (((res <= 1 && 0 < x + 1) && x / 2 <= 536870911) && 0 <= res)) || (((0 < x + 1 && res <= 26) && x / 2 <= 15) && 0 <= res)) || (((0 < x + 1 && res <= 15) && x / 2 <= 32767) && 0 <= res)) || (((0 < x + 1 && res <= 24) && 0 <= res) && x / 2 <= 63)) || (((x / 2 <= 33554431 && 0 < x + 1) && res <= 5) && 0 <= res)) || (((res <= 3 && 0 < x + 1) && x / 2 <= 134217727) && 0 <= res)) || (((0 < x + 1 && res <= 11) && x / 2 <= 524287) && 0 <= res)) || (((x / 2 <= 1048575 && res <= 10) && 0 < x + 1) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 8388607) && 0 <= res) && res <= 7)) || (((0 < x + 1 && x / 2 <= 2097151) && 0 <= res) && res <= 9)) || (((res <= 23 && 0 < x + 1) && x / 2 <= 127) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 67108863) && res <= 4) && 0 <= res)) || (((res <= 21 && x / 2 <= 511) && 0 < x + 1) && 0 <= res)) || (((res <= 16 && 0 < x + 1) && 0 <= res) && x / 2 <= 16383)) || (((res <= 2 && 0 < x + 1) && 0 <= res) && x / 2 <= 268435455)) || (((0 < x + 1 && x / 2 <= 8191) && res <= 17) && 0 <= res)) || (((x / 2 <= 1 && res <= 29) && 0 < x + 1) && 0 <= res)) || ((0 < x + 1 && 0 <= res) && x <= 1)) || (((res <= 25 && 0 < x + 1) && 0 <= res) && x / 2 <= 31)) || (((x / 2 <= 65535 && 0 < x + 1) && 0 <= res) && res <= 14)) || (((x / 2 <= 262143 && 0 < x + 1) && res <= 12) && 0 <= res) [2018-11-18 14:24:01,068 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_fc93009e-9404-45e1-9abc-8a2514c58ce2/bin-2019/utaipan/witness.graphml [2018-11-18 14:24:01,068 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 14:24:01,069 INFO L168 Benchmark]: Toolchain (without parser) took 40765.73 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 758.1 MB). Free memory was 960.2 MB in the beginning and 897.6 MB in the end (delta: 62.6 MB). Peak memory consumption was 820.7 MB. Max. memory is 11.5 GB. [2018-11-18 14:24:01,069 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 14:24:01,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 135.20 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-18 14:24:01,070 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.97 ms. Allocated memory is still 1.0 GB. Free memory is still 949.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 14:24:01,070 INFO L168 Benchmark]: Boogie Preprocessor took 16.69 ms. Allocated memory is still 1.0 GB. Free memory was 949.4 MB in the beginning and 946.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 14:24:01,070 INFO L168 Benchmark]: RCFGBuilder took 183.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 946.7 MB in the beginning and 1.1 GB in the end (delta: -169.1 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 14:24:01,071 INFO L168 Benchmark]: TraceAbstraction took 40367.12 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 625.0 MB). Free memory was 1.1 GB in the beginning and 916.4 MB in the end (delta: 199.4 MB). Peak memory consumption was 824.3 MB. Max. memory is 11.5 GB. [2018-11-18 14:24:01,071 INFO L168 Benchmark]: Witness Printer took 46.27 ms. Allocated memory is still 1.8 GB. Free memory was 916.4 MB in the beginning and 897.6 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 11.5 GB. [2018-11-18 14:24:01,073 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 135.20 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.97 ms. Allocated memory is still 1.0 GB. Free memory is still 949.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.69 ms. Allocated memory is still 1.0 GB. Free memory was 949.4 MB in the beginning and 946.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 183.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 946.7 MB in the beginning and 1.1 GB in the end (delta: -169.1 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 40367.12 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 625.0 MB). Free memory was 1.1 GB in the beginning and 916.4 MB in the end (delta: 199.4 MB). Peak memory consumption was 824.3 MB. Max. memory is 11.5 GB. * Witness Printer took 46.27 ms. Allocated memory is still 1.8 GB. Free memory was 916.4 MB in the beginning and 897.6 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 10]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 9]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 9]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((res <= 22 && 0 < x + 1) && x / 2 <= 255) && 0 <= res) || (((res <= 19 && 0 < x + 1) && x / 2 <= 2047) && 0 <= res)) || (((x / 2 <= 16777215 && 0 < x + 1) && res <= 6) && 0 <= res)) || 2147483647 < \old(x)) || ((x <= 2147483647 && res <= 0) && 0 <= res)) || (((x / 2 <= 7 && 0 < x + 1) && res <= 27) && 0 <= res)) || (((0 < x + 1 && res <= 8) && x / 2 <= 4194303) && 0 <= res)) || (((res <= 18 && 0 < x + 1) && 0 <= res) && x / 2 <= 4095)) || (((0 < x + 1 && res <= 13) && x / 2 <= 131071) && 0 <= res)) || (((res <= 20 && 0 < x + 1) && 0 <= res) && x / 2 <= 1023)) || (((res <= 28 && 0 < x + 1) && x / 2 <= 3) && 0 <= res)) || (((res <= 1 && 0 < x + 1) && x / 2 <= 536870911) && 0 <= res)) || (((0 < x + 1 && res <= 26) && x / 2 <= 15) && 0 <= res)) || (((0 < x + 1 && res <= 15) && x / 2 <= 32767) && 0 <= res)) || (((0 < x + 1 && res <= 24) && 0 <= res) && x / 2 <= 63)) || (((x / 2 <= 33554431 && 0 < x + 1) && res <= 5) && 0 <= res)) || (((res <= 3 && 0 < x + 1) && x / 2 <= 134217727) && 0 <= res)) || (((0 < x + 1 && res <= 11) && x / 2 <= 524287) && 0 <= res)) || (((x / 2 <= 1048575 && res <= 10) && 0 < x + 1) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 8388607) && 0 <= res) && res <= 7)) || (((0 < x + 1 && x / 2 <= 2097151) && 0 <= res) && res <= 9)) || (((res <= 23 && 0 < x + 1) && x / 2 <= 127) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 67108863) && res <= 4) && 0 <= res)) || (((res <= 21 && x / 2 <= 511) && 0 < x + 1) && 0 <= res)) || (((res <= 16 && 0 < x + 1) && 0 <= res) && x / 2 <= 16383)) || (((res <= 2 && 0 < x + 1) && 0 <= res) && x / 2 <= 268435455)) || (((0 < x + 1 && x / 2 <= 8191) && res <= 17) && 0 <= res)) || (((x / 2 <= 1 && res <= 29) && 0 < x + 1) && 0 <= res)) || ((0 < x + 1 && 0 <= res) && x <= 1)) || (((res <= 25 && 0 < x + 1) && 0 <= res) && x / 2 <= 31)) || (((x / 2 <= 65535 && 0 < x + 1) && 0 <= res) && res <= 14)) || (((x / 2 <= 262143 && 0 < x + 1) && res <= 12) && 0 <= res) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 4 error locations. SAFE Result, 40.3s OverallTime, 33 OverallIterations, 31 TraceHistogramMax, 7.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 454 SDtfs, 1859 SDslu, 7845 SDs, 0 SdLazy, 3430 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7479 GetRequests, 4993 SyntacticMatches, 0 SemanticMatches, 2486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55653 ImplicationChecksByTransitivity, 33.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=193occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 33 MinimizatonAttempts, 31 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 38 NumberOfFragments, 528 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 183 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 30.0s InterpolantComputationTime, 6143 NumberOfCodeBlocks, 6143 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 9010 ConstructedInterpolants, 0 QuantifiedInterpolants, 3390992 SizeOfPredicates, 464 NumberOfNonLiveVariables, 6061 ConjunctsInSsa, 957 ConjunctsInUnsatCore, 91 InterpolantComputations, 4 PerfectInterpolantSequences, 2760/82365 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...