./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-numeric/TwoWay_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/TwoWay_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/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 dd635190a9aa277670265f46b90ecce0c321a2a9 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 05:43:53,254 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 05:43:53,255 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 05:43:53,264 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 05:43:53,264 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 05:43:53,265 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 05:43:53,266 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 05:43:53,268 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 05:43:53,269 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 05:43:53,270 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 05:43:53,271 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 05:43:53,271 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 05:43:53,271 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 05:43:53,272 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 05:43:53,273 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 05:43:53,274 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 05:43:53,274 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 05:43:53,276 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 05:43:53,277 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 05:43:53,279 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 05:43:53,279 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 05:43:53,280 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 05:43:53,282 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 05:43:53,283 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 05:43:53,283 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 05:43:53,284 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 05:43:53,284 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 05:43:53,285 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 05:43:53,286 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 05:43:53,287 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 05:43:53,287 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 05:43:53,287 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 05:43:53,288 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 05:43:53,288 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 05:43:53,288 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 05:43:53,289 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 05:43:53,289 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-10-27 05:43:53,301 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 05:43:53,301 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 05:43:53,302 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 05:43:53,302 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 05:43:53,302 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 05:43:53,302 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 05:43:53,302 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 05:43:53,303 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 05:43:53,303 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 05:43:53,303 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 05:43:53,303 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 05:43:53,303 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 05:43:53,304 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 05:43:53,304 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 05:43:53,304 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 05:43:53,304 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 05:43:53,304 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 05:43:53,304 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 05:43:53,304 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-10-27 05:43:53,305 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 05:43:53,305 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 05:43:53,305 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 05:43:53,305 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 05:43:53,305 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 05:43:53,307 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 05:43:53,307 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 05:43:53,307 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 05:43:53,308 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 05:43:53,308 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 05:43:53,308 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 05:43:53,308 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 05:43:53,308 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 05:43:53,308 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 05:43:53,308 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_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/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 -> dd635190a9aa277670265f46b90ecce0c321a2a9 [2018-10-27 05:43:53,335 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 05:43:53,344 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 05:43:53,347 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 05:43:53,348 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 05:43:53,348 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 05:43:53,349 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/../../sv-benchmarks/c/termination-numeric/TwoWay_true-termination_true-no-overflow.c [2018-10-27 05:43:53,395 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/data/354c7bcfa/6981be0adc37443c8a27c90b89a526ef/FLAG685f1db6e [2018-10-27 05:43:53,762 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 05:43:53,763 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/sv-benchmarks/c/termination-numeric/TwoWay_true-termination_true-no-overflow.c [2018-10-27 05:43:53,769 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/data/354c7bcfa/6981be0adc37443c8a27c90b89a526ef/FLAG685f1db6e [2018-10-27 05:43:53,784 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/data/354c7bcfa/6981be0adc37443c8a27c90b89a526ef [2018-10-27 05:43:53,788 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 05:43:53,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 05:43:53,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 05:43:53,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 05:43:53,793 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 05:43:53,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:43:53" (1/1) ... [2018-10-27 05:43:53,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c4ac005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53, skipping insertion in model container [2018-10-27 05:43:53,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:43:53" (1/1) ... [2018-10-27 05:43:53,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 05:43:53,825 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 05:43:53,927 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:43:53,929 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 05:43:53,940 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:43:53,950 INFO L193 MainTranslator]: Completed translation [2018-10-27 05:43:53,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53 WrapperNode [2018-10-27 05:43:53,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 05:43:53,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 05:43:53,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 05:43:53,951 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 05:43:53,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53" (1/1) ... [2018-10-27 05:43:53,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53" (1/1) ... [2018-10-27 05:43:53,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 05:43:53,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 05:43:53,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 05:43:53,968 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 05:43:53,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53" (1/1) ... [2018-10-27 05:43:53,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53" (1/1) ... [2018-10-27 05:43:53,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53" (1/1) ... [2018-10-27 05:43:53,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53" (1/1) ... [2018-10-27 05:43:53,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53" (1/1) ... [2018-10-27 05:43:53,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53" (1/1) ... [2018-10-27 05:43:53,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53" (1/1) ... [2018-10-27 05:43:53,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 05:43:53,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 05:43:53,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 05:43:53,986 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 05:43:53,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 05:43:54,089 INFO L130 BoogieDeclarations]: Found specification of procedure twoWay [2018-10-27 05:43:54,089 INFO L138 BoogieDeclarations]: Found implementation of procedure twoWay [2018-10-27 05:43:54,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 05:43:54,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 05:43:54,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 05:43:54,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 05:43:54,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 05:43:54,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 05:43:54,499 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 05:43:54,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:43:54 BoogieIcfgContainer [2018-10-27 05:43:54,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 05:43:54,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 05:43:54,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 05:43:54,504 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 05:43:54,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:43:53" (1/3) ... [2018-10-27 05:43:54,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c6cb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:43:54, skipping insertion in model container [2018-10-27 05:43:54,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:43:53" (2/3) ... [2018-10-27 05:43:54,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c6cb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:43:54, skipping insertion in model container [2018-10-27 05:43:54,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:43:54" (3/3) ... [2018-10-27 05:43:54,507 INFO L112 eAbstractionObserver]: Analyzing ICFG TwoWay_true-termination_true-no-overflow.c [2018-10-27 05:43:54,517 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 05:43:54,523 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-10-27 05:43:54,537 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-10-27 05:43:54,564 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 05:43:54,564 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 05:43:54,564 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 05:43:54,564 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 05:43:54,564 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 05:43:54,564 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 05:43:54,564 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 05:43:54,564 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 05:43:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-10-27 05:43:54,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-27 05:43:54,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:43:54,585 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:43:54,587 INFO L424 AbstractCegarLoop]: === Iteration 1 === [twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:43:54,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:43:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1810771843, now seen corresponding path program 1 times [2018-10-27 05:43:54,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:43:54,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:54,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:43:54,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:54,637 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:43:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:43:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:43:54,900 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:43:54,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 05:43:54,900 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:43:54,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 05:43:54,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 05:43:54,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-27 05:43:54,913 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 7 states. [2018-10-27 05:43:55,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:43:55,410 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2018-10-27 05:43:55,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 05:43:55,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-27 05:43:55,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:43:55,424 INFO L225 Difference]: With dead ends: 61 [2018-10-27 05:43:55,425 INFO L226 Difference]: Without dead ends: 55 [2018-10-27 05:43:55,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:43:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-27 05:43:55,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2018-10-27 05:43:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-27 05:43:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2018-10-27 05:43:55,464 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 12 [2018-10-27 05:43:55,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:43:55,464 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2018-10-27 05:43:55,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 05:43:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2018-10-27 05:43:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-27 05:43:55,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:43:55,465 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:43:55,468 INFO L424 AbstractCegarLoop]: === Iteration 2 === [twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:43:55,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:43:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1810772035, now seen corresponding path program 1 times [2018-10-27 05:43:55,469 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:43:55,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:55,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:43:55,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:55,470 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:43:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:43:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:43:55,521 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:43:55,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:43:55,521 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:43:55,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:43:55,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:43:55,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:43:55,523 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 4 states. [2018-10-27 05:43:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:43:55,569 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2018-10-27 05:43:55,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 05:43:55,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-10-27 05:43:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:43:55,571 INFO L225 Difference]: With dead ends: 49 [2018-10-27 05:43:55,571 INFO L226 Difference]: Without dead ends: 22 [2018-10-27 05:43:55,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:43:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-27 05:43:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-27 05:43:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-27 05:43:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-27 05:43:55,578 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2018-10-27 05:43:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:43:55,579 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-27 05:43:55,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:43:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-27 05:43:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-27 05:43:55,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:43:55,579 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:43:55,580 INFO L424 AbstractCegarLoop]: === Iteration 3 === [twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:43:55,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:43:55,580 INFO L82 PathProgramCache]: Analyzing trace with hash 299352326, now seen corresponding path program 1 times [2018-10-27 05:43:55,580 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:43:55,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:55,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:43:55,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:55,581 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:43:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:43:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:43:55,627 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:43:55,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 05:43:55,627 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:43:55,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:43:55,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:43:55,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:43:55,628 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2018-10-27 05:43:55,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:43:55,740 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2018-10-27 05:43:55,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 05:43:55,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-27 05:43:55,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:43:55,742 INFO L225 Difference]: With dead ends: 22 [2018-10-27 05:43:55,742 INFO L226 Difference]: Without dead ends: 21 [2018-10-27 05:43:55,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:43:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-27 05:43:55,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-27 05:43:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-27 05:43:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-27 05:43:55,749 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 13 [2018-10-27 05:43:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:43:55,749 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-27 05:43:55,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:43:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-27 05:43:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-27 05:43:55,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:43:55,750 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:43:55,750 INFO L424 AbstractCegarLoop]: === Iteration 4 === [twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:43:55,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:43:55,751 INFO L82 PathProgramCache]: Analyzing trace with hash -968795783, now seen corresponding path program 1 times [2018-10-27 05:43:55,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:43:55,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:55,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:43:55,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:55,752 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:43:55,767 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 05:43:55,774 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 05:43:55,774 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 05:43:55,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:43:55,781 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 05:43:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:43:55,806 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-10-27 05:43:55,807 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [9], [11], [20], [21], [25], [26], [30], [34], [38], [42], [43], [44], [45], [46], [48] [2018-10-27 05:43:55,841 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:43:55,841 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:43:56,035 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:43:56,036 INFO L272 AbstractInterpreter]: Visited 19 different actions 48 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-10-27 05:43:56,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:43:56,050 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:43:56,152 INFO L227 lantSequenceWeakener]: Weakened 11 states. On average, predicates are now at 67.12% of their original sizes. [2018-10-27 05:43:56,153 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:43:56,518 INFO L415 sIntCurrentIteration]: We unified 19 AI predicates to 19 [2018-10-27 05:43:56,518 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:43:56,519 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:43:56,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-10-27 05:43:56,519 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:43:56,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-27 05:43:56,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 05:43:56,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-10-27 05:43:56,520 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 14 states. [2018-10-27 05:43:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:43:58,109 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2018-10-27 05:43:58,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 05:43:58,109 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2018-10-27 05:43:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:43:58,110 INFO L225 Difference]: With dead ends: 58 [2018-10-27 05:43:58,110 INFO L226 Difference]: Without dead ends: 47 [2018-10-27 05:43:58,111 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2018-10-27 05:43:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-27 05:43:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2018-10-27 05:43:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-27 05:43:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2018-10-27 05:43:58,124 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 20 [2018-10-27 05:43:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:43:58,124 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2018-10-27 05:43:58,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-27 05:43:58,124 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2018-10-27 05:43:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-27 05:43:58,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:43:58,125 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:43:58,125 INFO L424 AbstractCegarLoop]: === Iteration 5 === [twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:43:58,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:43:58,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1010881698, now seen corresponding path program 2 times [2018-10-27 05:43:58,126 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:43:58,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:58,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:43:58,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:58,127 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:43:58,144 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 05:43:58,145 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 05:43:58,145 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 05:43:58,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:43:58,159 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 05:43:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:43:58,181 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:43:58,182 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:43:58,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:43:58,182 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:43:58,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:43:58,188 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:43:58,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-27 05:43:58,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:43:58,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:43:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-27 05:43:58,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:43:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-27 05:43:58,487 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:43:58,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2018-10-27 05:43:58,487 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:43:58,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 05:43:58,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 05:43:58,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-27 05:43:58,488 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 5 states. [2018-10-27 05:43:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:43:58,574 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2018-10-27 05:43:58,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 05:43:58,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2018-10-27 05:43:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:43:58,576 INFO L225 Difference]: With dead ends: 51 [2018-10-27 05:43:58,577 INFO L226 Difference]: Without dead ends: 50 [2018-10-27 05:43:58,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:43:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-27 05:43:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2018-10-27 05:43:58,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-27 05:43:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2018-10-27 05:43:58,589 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 26 [2018-10-27 05:43:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:43:58,590 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2018-10-27 05:43:58,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 05:43:58,590 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2018-10-27 05:43:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-27 05:43:58,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:43:58,591 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:43:58,591 INFO L424 AbstractCegarLoop]: === Iteration 6 === [twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:43:58,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:43:58,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1272561512, now seen corresponding path program 1 times [2018-10-27 05:43:58,592 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:43:58,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:58,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:43:58,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:43:58,593 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:43:58,610 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 05:43:58,612 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 05:43:58,612 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 05:43:58,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:43:58,625 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 05:43:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:43:58,661 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-10-27 05:43:58,662 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [9], [11], [20], [22], [23], [25], [26], [30], [34], [38], [42], [43], [44], [45], [46], [48] [2018-10-27 05:43:58,663 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:43:58,663 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:43:58,702 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:43:58,702 INFO L272 AbstractInterpreter]: Visited 20 different actions 51 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-10-27 05:43:58,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:43:58,742 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:43:58,789 INFO L227 lantSequenceWeakener]: Weakened 17 states. On average, predicates are now at 65.2% of their original sizes. [2018-10-27 05:43:58,790 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:43:59,194 INFO L415 sIntCurrentIteration]: We unified 26 AI predicates to 26 [2018-10-27 05:43:59,194 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:43:59,194 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:43:59,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2018-10-27 05:43:59,195 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:43:59,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-27 05:43:59,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-27 05:43:59,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2018-10-27 05:43:59,196 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 19 states. [2018-10-27 05:44:01,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:44:01,810 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2018-10-27 05:44:01,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-27 05:44:01,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2018-10-27 05:44:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:44:01,811 INFO L225 Difference]: With dead ends: 54 [2018-10-27 05:44:01,811 INFO L226 Difference]: Without dead ends: 53 [2018-10-27 05:44:01,812 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2018-10-27 05:44:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-27 05:44:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-10-27 05:44:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-27 05:44:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2018-10-27 05:44:01,820 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 27 [2018-10-27 05:44:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:44:01,820 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2018-10-27 05:44:01,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-27 05:44:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2018-10-27 05:44:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-27 05:44:01,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:44:01,821 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:44:01,821 INFO L424 AbstractCegarLoop]: === Iteration 7 === [twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:44:01,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:44:01,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1082241716, now seen corresponding path program 1 times [2018-10-27 05:44:01,823 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:44:01,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:44:01,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:44:01,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:44:01,824 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:44:01,833 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 05:44:01,833 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 05:44:01,833 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-27 05:44:01,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:44:01,842 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 05:44:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:44:01,879 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-10-27 05:44:01,879 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [9], [11], [20], [21], [22], [24], [25], [26], [30], [34], [38], [42], [43], [44], [45], [46], [48] [2018-10-27 05:44:01,880 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:44:01,881 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:44:01,938 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:44:01,938 INFO L272 AbstractInterpreter]: Visited 21 different actions 75 times. Merged at 6 different actions 20 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-10-27 05:44:01,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:44:01,977 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:44:01,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:44:01,977 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-27 05:44:01,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:44:01,991 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:44:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:44:02,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:44:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 05:44:02,209 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:44:10,721 WARN L179 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 53 [2018-10-27 05:44:24,820 WARN L179 SmtUtils]: Spent 10.21 s on a formula simplification that was a NOOP. DAG size: 41 [2018-10-27 05:44:24,825 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2018-10-27 05:44:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 05:44:25,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 05:44:25,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-27 05:44:25,250 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:44:25,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-27 05:44:25,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-27 05:44:25,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=310, Unknown=4, NotChecked=0, Total=380 [2018-10-27 05:44:25,251 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 20 states. [2018-10-27 05:44:26,689 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 19 [2018-10-27 05:44:27,727 WARN L179 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 20 [2018-10-27 05:44:27,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:44:27,982 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2018-10-27 05:44:27,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 05:44:27,982 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2018-10-27 05:44:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:44:27,983 INFO L225 Difference]: With dead ends: 74 [2018-10-27 05:44:27,983 INFO L226 Difference]: Without dead ends: 73 [2018-10-27 05:44:27,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=229, Invalid=757, Unknown=6, NotChecked=0, Total=992 [2018-10-27 05:44:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-27 05:44:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2018-10-27 05:44:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-27 05:44:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2018-10-27 05:44:27,991 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 31 [2018-10-27 05:44:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:44:27,991 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2018-10-27 05:44:27,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-27 05:44:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2018-10-27 05:44:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-27 05:44:27,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:44:27,992 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:44:27,992 INFO L424 AbstractCegarLoop]: === Iteration 8 === [twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:44:27,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:44:27,992 INFO L82 PathProgramCache]: Analyzing trace with hash 810245226, now seen corresponding path program 1 times [2018-10-27 05:44:27,993 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:44:27,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:44:27,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:44:27,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:44:27,996 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:44:28,004 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 05:44:28,004 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 05:44:28,004 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 05:44:28,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:44:28,012 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 05:44:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:44:28,034 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-10-27 05:44:28,034 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [9], [11], [20], [22], [23], [24], [25], [26], [30], [34], [38], [42], [43], [44], [45], [46], [48] [2018-10-27 05:44:28,035 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:44:28,035 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:44:28,105 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:44:28,105 INFO L272 AbstractInterpreter]: Visited 21 different actions 75 times. Merged at 5 different actions 19 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-10-27 05:44:28,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:44:28,143 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:44:28,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:44:28,143 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/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 [2018-10-27 05:44:28,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:44:28,154 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:44:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:44:28,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:44:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 05:44:28,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:44:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 05:44:31,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 05:44:31,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2018-10-27 05:44:31,107 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:44:31,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-27 05:44:31,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-27 05:44:31,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=621, Unknown=1, NotChecked=0, Total=702 [2018-10-27 05:44:31,108 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 27 states. [2018-10-27 05:44:31,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:44:31,620 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2018-10-27 05:44:31,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 05:44:31,620 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2018-10-27 05:44:31,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:44:31,621 INFO L225 Difference]: With dead ends: 73 [2018-10-27 05:44:31,621 INFO L226 Difference]: Without dead ends: 64 [2018-10-27 05:44:31,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=215, Invalid=1044, Unknown=1, NotChecked=0, Total=1260 [2018-10-27 05:44:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-27 05:44:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-27 05:44:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-27 05:44:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2018-10-27 05:44:31,628 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 32 [2018-10-27 05:44:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:44:31,628 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2018-10-27 05:44:31,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-27 05:44:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2018-10-27 05:44:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-27 05:44:31,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:44:31,633 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:44:31,634 INFO L424 AbstractCegarLoop]: === Iteration 9 === [twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:44:31,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:44:31,634 INFO L82 PathProgramCache]: Analyzing trace with hash -122263405, now seen corresponding path program 2 times [2018-10-27 05:44:31,634 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:44:31,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:44:31,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:44:31,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:44:31,635 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:44:31,650 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 05:44:31,654 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 05:44:31,654 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 05:44:31,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:44:31,662 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 05:44:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:44:31,685 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:44:31,685 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:44:31,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:44:31,685 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/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 [2018-10-27 05:44:31,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:44:31,692 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:44:31,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-27 05:44:31,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:44:31,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:44:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-27 05:44:32,056 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:44:45,352 WARN L179 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 35 [2018-10-27 05:44:45,354 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-10-27 05:44:52,471 WARN L179 SmtUtils]: Spent 988.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-10-27 05:44:52,475 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-10-27 05:44:57,401 WARN L179 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2018-10-27 05:44:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 1 refuted. 4 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-27 05:44:57,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 05:44:57,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2018-10-27 05:44:57,493 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:44:57,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-27 05:44:57,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-27 05:44:57,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=494, Unknown=13, NotChecked=0, Total=600 [2018-10-27 05:44:57,494 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 25 states. [2018-10-27 05:45:00,099 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_twoWay_~m~0 1))) (and (= c_twoWay_~n |c_twoWay_#in~n|) (<= .cse0 0) (= |c_twoWay_#in~n| .cse0) (forall ((v_twoWay_~m~0_BEFORE_CALL_11 Int) (|v_twoWay_#in~n_BEFORE_CALL_4| Int)) (or (< |c_twoWay_#in~n| v_twoWay_~m~0_BEFORE_CALL_11) (forall ((v_prenex_8 Int)) (>= (* (* (* v_twoWay_~m~0_BEFORE_CALL_11 |c_twoWay_#res|) |v_twoWay_#in~n_BEFORE_CALL_4|) v_prenex_8) (- 2147483648))) (exists ((v_subst_1 Int)) (not (>= (* (* v_twoWay_~m~0_BEFORE_CALL_11 |v_twoWay_#in~n_BEFORE_CALL_4|) v_subst_1) (- 2147483648)))))) (forall ((v_prenex_11 Int) (v_prenex_10 Int) (v_prenex_9 Int)) (or (>= (* (* (* v_prenex_9 |c_twoWay_#res|) v_prenex_10) v_prenex_11) (- 2147483648)) (< |c_twoWay_#in~n| v_prenex_9) (<= (+ v_prenex_9 1) 0))) (<= 0 |c_twoWay_#in~n|) (= 1 |c_twoWay_#t~ret2|))) is different from false [2018-10-27 05:45:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:45:02,881 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2018-10-27 05:45:02,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 05:45:02,882 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2018-10-27 05:45:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:45:02,883 INFO L225 Difference]: With dead ends: 64 [2018-10-27 05:45:02,883 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 05:45:02,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=202, Invalid=908, Unknown=16, NotChecked=64, Total=1190 [2018-10-27 05:45:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 05:45:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 05:45:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 05:45:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 05:45:02,884 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2018-10-27 05:45:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:45:02,884 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 05:45:02,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-27 05:45:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 05:45:02,884 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 05:45:02,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-27 05:45:03,244 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 40 [2018-10-27 05:45:03,257 INFO L425 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-10-27 05:45:03,257 INFO L421 ceAbstractionStarter]: At program point L31-2(lines 31 35) the Hoare annotation is: (and (or (< 4294967294 (* 2 |twoWay_#in~n|)) (< (+ |twoWay_#in~n| 1) |twoWay_#in~terminate|) (not (= |twoWay_#in~terminate| 1)) (and (= twoWay_~n |twoWay_#in~n|) (= |twoWay_#in~n| (+ twoWay_~m~0 1)) (= twoWay_~terminate 1))) (or (and (<= twoWay_~n |twoWay_#in~n|) (<= 0 (* 2 twoWay_~n))) (< 2147483647 |twoWay_#in~n|) (< (+ |twoWay_#in~n| 2) |twoWay_#in~terminate|) (< |twoWay_#in~terminate| 1) (< 2 (* 2 |twoWay_#in~terminate|)))) [2018-10-27 05:45:03,257 INFO L425 ceAbstractionStarter]: For program point L27(lines 27 37) no Hoare annotation was computed. [2018-10-27 05:45:03,257 INFO L425 ceAbstractionStarter]: For program point twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 36) no Hoare annotation was computed. [2018-10-27 05:45:03,257 INFO L425 ceAbstractionStarter]: For program point twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2018-10-27 05:45:03,257 INFO L425 ceAbstractionStarter]: For program point twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2018-10-27 05:45:03,257 INFO L425 ceAbstractionStarter]: For program point twoWayFINAL(lines 26 38) no Hoare annotation was computed. [2018-10-27 05:45:03,257 INFO L425 ceAbstractionStarter]: For program point L36(line 36) no Hoare annotation was computed. [2018-10-27 05:45:03,257 INFO L425 ceAbstractionStarter]: For program point L36-1(line 36) no Hoare annotation was computed. [2018-10-27 05:45:03,258 INFO L425 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-10-27 05:45:03,258 INFO L425 ceAbstractionStarter]: For program point L36-2(line 36) no Hoare annotation was computed. [2018-10-27 05:45:03,258 INFO L425 ceAbstractionStarter]: For program point L34-1(line 34) no Hoare annotation was computed. [2018-10-27 05:45:03,258 INFO L425 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2018-10-27 05:45:03,258 INFO L425 ceAbstractionStarter]: For program point L32-1(line 32) no Hoare annotation was computed. [2018-10-27 05:45:03,258 INFO L428 ceAbstractionStarter]: At program point twoWayENTRY(lines 26 38) the Hoare annotation is: true [2018-10-27 05:45:03,258 INFO L425 ceAbstractionStarter]: For program point twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2018-10-27 05:45:03,258 INFO L425 ceAbstractionStarter]: For program point twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2018-10-27 05:45:03,258 INFO L425 ceAbstractionStarter]: For program point twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 36) no Hoare annotation was computed. [2018-10-27 05:45:03,258 INFO L425 ceAbstractionStarter]: For program point twoWayEXIT(lines 26 38) no Hoare annotation was computed. [2018-10-27 05:45:03,258 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-27 05:45:03,258 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-27 05:45:03,258 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-27 05:45:03,259 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-27 05:45:03,259 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-27 05:45:03,259 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-27 05:45:03,259 INFO L421 ceAbstractionStarter]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (* 2 main_~y~0)) (.cse1 (* 2 main_~x~0))) (and (<= 0 (+ .cse0 4294967296)) (<= .cse0 4294967294) (<= .cse1 4294967294) (<= 0 .cse1))) [2018-10-27 05:45:03,259 INFO L425 ceAbstractionStarter]: For program point L48-1(line 48) no Hoare annotation was computed. [2018-10-27 05:45:03,259 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 40 50) the Hoare annotation is: true [2018-10-27 05:45:03,259 INFO L425 ceAbstractionStarter]: For program point L45(lines 45 46) no Hoare annotation was computed. [2018-10-27 05:45:03,259 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 40 50) no Hoare annotation was computed. [2018-10-27 05:45:03,259 INFO L425 ceAbstractionStarter]: For program point L42(lines 42 43) no Hoare annotation was computed. [2018-10-27 05:45:03,259 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 40 50) no Hoare annotation was computed. [2018-10-27 05:45:03,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 05:45:03 BoogieIcfgContainer [2018-10-27 05:45:03,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 05:45:03,262 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 05:45:03,262 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 05:45:03,262 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 05:45:03,263 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:43:54" (3/4) ... [2018-10-27 05:45:03,267 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-27 05:45:03,272 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure twoWay [2018-10-27 05:45:03,272 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-27 05:45:03,272 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-27 05:45:03,277 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-10-27 05:45:03,277 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-27 05:45:03,277 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-27 05:45:03,320 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c25d3961-4f8b-4ab6-b3bc-05f7fda65563/bin-2019/utaipan/witness.graphml [2018-10-27 05:45:03,323 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 05:45:03,324 INFO L168 Benchmark]: Toolchain (without parser) took 69534.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 191.9 MB). Free memory was 953.1 MB in the beginning and 941.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 203.7 MB. Max. memory is 11.5 GB. [2018-10-27 05:45:03,324 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 05:45:03,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.46 ms. Allocated memory is still 1.0 GB. Free memory was 953.1 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-27 05:45:03,325 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.31 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 05:45:03,325 INFO L168 Benchmark]: Boogie Preprocessor took 16.99 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 MB in the beginning and 939.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 05:45:03,325 INFO L168 Benchmark]: RCFGBuilder took 514.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -197.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2018-10-27 05:45:03,326 INFO L168 Benchmark]: TraceAbstraction took 68761.15 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 40.9 MB). Free memory was 1.1 GB in the beginning and 947.1 MB in the end (delta: 190.0 MB). Peak memory consumption was 230.9 MB. Max. memory is 11.5 GB. [2018-10-27 05:45:03,326 INFO L168 Benchmark]: Witness Printer took 60.71 ms. Allocated memory is still 1.2 GB. Free memory was 947.1 MB in the beginning and 941.3 MB in the end (delta: 5.8 MB). Peak memory consumption was 5.8 MB. Max. memory is 11.5 GB. [2018-10-27 05:45:03,328 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 160.46 ms. Allocated memory is still 1.0 GB. Free memory was 953.1 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.31 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.99 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 MB in the beginning and 939.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 514.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.0 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -197.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 68761.15 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 40.9 MB). Free memory was 1.1 GB in the beginning and 947.1 MB in the end (delta: 190.0 MB). Peak memory consumption was 230.9 MB. Max. memory is 11.5 GB. * Witness Printer took 60.71 ms. Allocated memory is still 1.2 GB. Free memory was 947.1 MB in the beginning and 941.3 MB in the end (delta: 5.8 MB). Peak memory consumption was 5.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 36]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 34]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 34]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 6 error locations. SAFE Result, 68.7s OverallTime, 9 OverallIterations, 4 TraceHistogramMax, 13.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 151 SDtfs, 528 SDslu, 870 SDs, 0 SdLazy, 938 SolverSat, 221 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 380 GetRequests, 200 SyntacticMatches, 10 SemanticMatches, 170 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 57.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 4 AbstIntIterations, 2 AbstIntStrong, 0.889814814814815 AbsIntWeakeningRatio, 0.8666666666666667 AbsIntAvgWeakeningVarsNumRemoved, 30.066666666666666 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 33 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 21 NumberOfFragments, 88 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 763 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 52.4s InterpolantComputationTime, 348 NumberOfCodeBlocks, 336 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 290 ConstructedInterpolants, 58 QuantifiedInterpolants, 66368 SizeOfPredicates, 23 NumberOfNonLiveVariables, 350 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 99/156 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...