./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d28857c86a3c83fc75b1b8cf8125f1c52a370911 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 09:56:39,445 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 09:56:39,446 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 09:56:39,453 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 09:56:39,454 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 09:56:39,454 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 09:56:39,455 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 09:56:39,456 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 09:56:39,457 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 09:56:39,458 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 09:56:39,459 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 09:56:39,459 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 09:56:39,459 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 09:56:39,460 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 09:56:39,461 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 09:56:39,461 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 09:56:39,462 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 09:56:39,463 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 09:56:39,464 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 09:56:39,466 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 09:56:39,466 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 09:56:39,467 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 09:56:39,469 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 09:56:39,469 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 09:56:39,469 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 09:56:39,470 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 09:56:39,471 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 09:56:39,471 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 09:56:39,472 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 09:56:39,472 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 09:56:39,473 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 09:56:39,473 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 09:56:39,473 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 09:56:39,473 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 09:56:39,474 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 09:56:39,475 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 09:56:39,475 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-11-10 09:56:39,485 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 09:56:39,485 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 09:56:39,486 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 09:56:39,486 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 09:56:39,486 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 09:56:39,486 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 09:56:39,486 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 09:56:39,486 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 09:56:39,487 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 09:56:39,487 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 09:56:39,487 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 09:56:39,487 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 09:56:39,487 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-10 09:56:39,488 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 09:56:39,488 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 09:56:39,488 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 09:56:39,488 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 09:56:39,488 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 09:56:39,488 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-10 09:56:39,488 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 09:56:39,489 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 09:56:39,489 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 09:56:39,489 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 09:56:39,489 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 09:56:39,489 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 09:56:39,489 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 09:56:39,490 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 09:56:39,490 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 09:56:39,490 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 09:56:39,490 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 09:56:39,490 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 09:56:39,490 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 09:56:39,490 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 09:56:39,490 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_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d28857c86a3c83fc75b1b8cf8125f1c52a370911 [2018-11-10 09:56:39,512 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 09:56:39,520 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 09:56:39,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 09:56:39,523 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 09:56:39,523 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 09:56:39,523 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/../../sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c [2018-11-10 09:56:39,559 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/data/1b9ecda09/aaff94862ceb461c8271c63300563f10/FLAG2509b2184 [2018-11-10 09:56:39,943 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 09:56:39,944 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c [2018-11-10 09:56:39,947 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/data/1b9ecda09/aaff94862ceb461c8271c63300563f10/FLAG2509b2184 [2018-11-10 09:56:39,956 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/data/1b9ecda09/aaff94862ceb461c8271c63300563f10 [2018-11-10 09:56:39,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 09:56:39,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 09:56:39,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 09:56:39,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 09:56:39,961 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 09:56:39,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 09:56:39" (1/1) ... [2018-11-10 09:56:39,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b7c96dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:39, skipping insertion in model container [2018-11-10 09:56:39,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 09:56:39" (1/1) ... [2018-11-10 09:56:39,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 09:56:39,981 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 09:56:40,074 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 09:56:40,076 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 09:56:40,083 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 09:56:40,091 INFO L193 MainTranslator]: Completed translation [2018-11-10 09:56:40,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40 WrapperNode [2018-11-10 09:56:40,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 09:56:40,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 09:56:40,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 09:56:40,092 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 09:56:40,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40" (1/1) ... [2018-11-10 09:56:40,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40" (1/1) ... [2018-11-10 09:56:40,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 09:56:40,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 09:56:40,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 09:56:40,105 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 09:56:40,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40" (1/1) ... [2018-11-10 09:56:40,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40" (1/1) ... [2018-11-10 09:56:40,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40" (1/1) ... [2018-11-10 09:56:40,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40" (1/1) ... [2018-11-10 09:56:40,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40" (1/1) ... [2018-11-10 09:56:40,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40" (1/1) ... [2018-11-10 09:56:40,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40" (1/1) ... [2018-11-10 09:56:40,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 09:56:40,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 09:56:40,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 09:56:40,122 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 09:56:40,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 09:56:40,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 09:56:40,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 09:56:40,207 INFO L130 BoogieDeclarations]: Found specification of procedure mlog [2018-11-10 09:56:40,207 INFO L138 BoogieDeclarations]: Found implementation of procedure mlog [2018-11-10 09:56:40,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 09:56:40,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 09:56:40,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 09:56:40,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 09:56:40,321 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 09:56:40,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 09:56:40 BoogieIcfgContainer [2018-11-10 09:56:40,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 09:56:40,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 09:56:40,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 09:56:40,325 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 09:56:40,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 09:56:39" (1/3) ... [2018-11-10 09:56:40,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c87356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 09:56:40, skipping insertion in model container [2018-11-10 09:56:40,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 09:56:40" (2/3) ... [2018-11-10 09:56:40,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c87356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 09:56:40, skipping insertion in model container [2018-11-10 09:56:40,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 09:56:40" (3/3) ... [2018-11-10 09:56:40,327 INFO L112 eAbstractionObserver]: Analyzing ICFG java_LogBuiltIn_true-termination_true-no-overflow.c [2018-11-10 09:56:40,333 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 09:56:40,338 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-11-10 09:56:40,348 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-11-10 09:56:40,368 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 09:56:40,368 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 09:56:40,368 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 09:56:40,368 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 09:56:40,368 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 09:56:40,368 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 09:56:40,369 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 09:56:40,369 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 09:56:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-11-10 09:56:40,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 09:56:40,384 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:40,384 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:40,386 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:40,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1166998001, now seen corresponding path program 1 times [2018-11-10 09:56:40,392 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:40,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:40,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:40,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:40,423 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:40,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 09:56:40,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 09:56:40,554 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 09:56:40,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 09:56:40,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 09:56:40,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-10 09:56:40,566 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2018-11-10 09:56:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:40,628 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-11-10 09:56:40,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 09:56:40,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-11-10 09:56:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:40,634 INFO L225 Difference]: With dead ends: 33 [2018-11-10 09:56:40,634 INFO L226 Difference]: Without dead ends: 15 [2018-11-10 09:56:40,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-10 09:56:40,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-10 09:56:40,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-10 09:56:40,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-10 09:56:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-10 09:56:40,663 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-11-10 09:56:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:40,663 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-10 09:56:40,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 09:56:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-10 09:56:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-10 09:56:40,664 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:40,664 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:40,664 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:40,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:40,664 INFO L82 PathProgramCache]: Analyzing trace with hash -498613263, now seen corresponding path program 1 times [2018-11-10 09:56:40,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:40,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:40,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:40,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:40,666 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:40,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 09:56:40,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 09:56:40,708 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 09:56:40,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 09:56:40,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 09:56:40,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 09:56:40,709 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2018-11-10 09:56:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:40,739 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-10 09:56:40,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 09:56:40,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-11-10 09:56:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:40,740 INFO L225 Difference]: With dead ends: 23 [2018-11-10 09:56:40,740 INFO L226 Difference]: Without dead ends: 22 [2018-11-10 09:56:40,741 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 [2018-11-10 09:56:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-10 09:56:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-11-10 09:56:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-10 09:56:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-10 09:56:40,744 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 12 [2018-11-10 09:56:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:40,744 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-10 09:56:40,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 09:56:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-10 09:56:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 09:56:40,745 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:40,745 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:40,745 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:40,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:40,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1722858080, now seen corresponding path program 1 times [2018-11-10 09:56:40,745 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:40,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:40,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:40,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:40,746 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:40,778 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 09:56:40,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 09:56:40,778 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 09:56:40,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 09:56:40,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 09:56:40,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 09:56:40,779 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 4 states. [2018-11-10 09:56:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:40,803 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-10 09:56:40,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 09:56:40,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-11-10 09:56:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:40,805 INFO L225 Difference]: With dead ends: 20 [2018-11-10 09:56:40,805 INFO L226 Difference]: Without dead ends: 19 [2018-11-10 09:56:40,805 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 [2018-11-10 09:56:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-10 09:56:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-10 09:56:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-10 09:56:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-11-10 09:56:40,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 13 [2018-11-10 09:56:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:40,810 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-11-10 09:56:40,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 09:56:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-11-10 09:56:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-10 09:56:40,810 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:40,811 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:40,811 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:40,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:40,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1384465031, now seen corresponding path program 1 times [2018-11-10 09:56:40,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:40,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:40,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:40,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:40,812 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:40,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:40,867 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:40,867 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-11-10 09:56:40,869 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [16], [17], [19], [28], [32], [33], [34], [36] [2018-11-10 09:56:40,902 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 09:56:40,902 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 09:56:40,978 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 09:56:41,178 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 09:56:41,183 INFO L272 AbstractInterpreter]: Visited 14 different actions 69 times. Merged at 7 different actions 48 times. Widened at 1 different actions 4 times. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-10 09:56:41,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:41,202 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 09:56:41,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:41,203 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:41,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:41,208 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 09:56:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:41,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:41,237 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:41,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:41,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-11-10 09:56:41,284 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:41,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 09:56:41,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 09:56:41,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-11-10 09:56:41,285 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-11-10 09:56:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:41,310 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-11-10 09:56:41,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 09:56:41,311 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-11-10 09:56:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:41,311 INFO L225 Difference]: With dead ends: 27 [2018-11-10 09:56:41,311 INFO L226 Difference]: Without dead ends: 26 [2018-11-10 09:56:41,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-10 09:56:41,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-10 09:56:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-11-10 09:56:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-10 09:56:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-11-10 09:56:41,315 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 18 [2018-11-10 09:56:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:41,315 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-11-10 09:56:41,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 09:56:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-11-10 09:56:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-10 09:56:41,316 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:41,316 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:41,316 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:41,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:41,317 INFO L82 PathProgramCache]: Analyzing trace with hash 823326877, now seen corresponding path program 2 times [2018-11-10 09:56:41,317 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:41,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:41,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:41,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:41,318 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:41,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:41,391 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:41,391 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:41,391 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:41,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:41,391 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:41,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 09:56:41,406 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 09:56:41,416 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-10 09:56:41,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:41,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:41,423 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:41,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:41,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-11-10 09:56:41,512 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:41,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 09:56:41,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 09:56:41,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-11-10 09:56:41,513 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 8 states. [2018-11-10 09:56:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:41,553 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-11-10 09:56:41,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 09:56:41,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2018-11-10 09:56:41,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:41,554 INFO L225 Difference]: With dead ends: 33 [2018-11-10 09:56:41,554 INFO L226 Difference]: Without dead ends: 32 [2018-11-10 09:56:41,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-11-10 09:56:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-10 09:56:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-11-10 09:56:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-10 09:56:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-11-10 09:56:41,559 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2018-11-10 09:56:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:41,559 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-11-10 09:56:41,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 09:56:41,559 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-11-10 09:56:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-10 09:56:41,560 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:41,560 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:41,560 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:41,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:41,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1808352819, now seen corresponding path program 3 times [2018-11-10 09:56:41,561 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:41,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:41,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:41,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:41,562 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:41,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:41,647 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:41,648 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:41,648 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:41,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:41,648 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:41,659 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 09:56:41,659 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 09:56:41,670 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 09:56:41,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:41,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:41,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:41,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:41,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-11-10 09:56:41,787 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:41,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 09:56:41,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 09:56:41,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-11-10 09:56:41,788 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 10 states. [2018-11-10 09:56:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:41,836 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-11-10 09:56:41,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 09:56:41,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-11-10 09:56:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:41,838 INFO L225 Difference]: With dead ends: 39 [2018-11-10 09:56:41,838 INFO L226 Difference]: Without dead ends: 38 [2018-11-10 09:56:41,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2018-11-10 09:56:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-10 09:56:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-11-10 09:56:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-10 09:56:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-11-10 09:56:41,845 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 30 [2018-11-10 09:56:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:41,845 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-11-10 09:56:41,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 09:56:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-11-10 09:56:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-10 09:56:41,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:41,846 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:41,846 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:41,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:41,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2068280503, now seen corresponding path program 4 times [2018-11-10 09:56:41,847 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:41,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:41,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:41,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:41,848 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:41,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:41,948 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:41,948 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:41,948 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:41,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:41,948 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:41,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:41,958 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 09:56:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:41,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:41,977 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:42,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:42,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-11-10 09:56:42,079 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:42,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 09:56:42,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 09:56:42,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-11-10 09:56:42,080 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2018-11-10 09:56:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:42,134 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-11-10 09:56:42,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 09:56:42,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2018-11-10 09:56:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:42,135 INFO L225 Difference]: With dead ends: 45 [2018-11-10 09:56:42,135 INFO L226 Difference]: Without dead ends: 44 [2018-11-10 09:56:42,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2018-11-10 09:56:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-10 09:56:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-11-10 09:56:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-10 09:56:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-11-10 09:56:42,139 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 36 [2018-11-10 09:56:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:42,140 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-11-10 09:56:42,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 09:56:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-11-10 09:56:42,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-10 09:56:42,140 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:42,141 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:42,141 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:42,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:42,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2010568737, now seen corresponding path program 5 times [2018-11-10 09:56:42,141 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:42,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:42,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:42,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:42,142 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:42,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:42,249 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:42,249 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:42,249 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:42,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:42,250 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:42,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 09:56:42,262 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 09:56:42,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-10 09:56:42,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:42,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:42,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:42,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:42,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2018-11-10 09:56:42,426 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:42,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 09:56:42,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 09:56:42,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-11-10 09:56:42,427 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 14 states. [2018-11-10 09:56:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:42,502 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-11-10 09:56:42,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 09:56:42,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2018-11-10 09:56:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:42,503 INFO L225 Difference]: With dead ends: 51 [2018-11-10 09:56:42,503 INFO L226 Difference]: Without dead ends: 50 [2018-11-10 09:56:42,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2018-11-10 09:56:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-10 09:56:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-11-10 09:56:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-10 09:56:42,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-11-10 09:56:42,508 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 42 [2018-11-10 09:56:42,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:42,508 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-11-10 09:56:42,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 09:56:42,509 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-11-10 09:56:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-10 09:56:42,509 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:42,509 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:42,509 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:42,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:42,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2103739403, now seen corresponding path program 6 times [2018-11-10 09:56:42,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:42,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:42,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:42,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:42,514 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:42,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:42,617 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:42,617 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:42,617 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:42,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:42,617 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:42,622 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 09:56:42,623 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 09:56:42,633 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 09:56:42,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:42,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:42,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:42,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:42,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2018-11-10 09:56:42,840 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:42,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 09:56:42,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 09:56:42,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-11-10 09:56:42,841 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 16 states. [2018-11-10 09:56:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:42,921 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-11-10 09:56:42,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 09:56:42,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2018-11-10 09:56:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:42,922 INFO L225 Difference]: With dead ends: 57 [2018-11-10 09:56:42,922 INFO L226 Difference]: Without dead ends: 56 [2018-11-10 09:56:42,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=428, Invalid=904, Unknown=0, NotChecked=0, Total=1332 [2018-11-10 09:56:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-10 09:56:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2018-11-10 09:56:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-10 09:56:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-11-10 09:56:42,927 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 48 [2018-11-10 09:56:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:42,928 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-11-10 09:56:42,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 09:56:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-11-10 09:56:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-10 09:56:42,929 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:42,929 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:42,929 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:42,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1992812427, now seen corresponding path program 7 times [2018-11-10 09:56:42,929 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:42,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:42,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:42,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:42,930 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:43,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:43,075 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:43,075 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:43,075 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:43,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:43,075 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:43,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:43,081 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 09:56:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:43,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:43,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:43,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:43,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2018-11-10 09:56:43,289 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:43,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 09:56:43,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 09:56:43,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-11-10 09:56:43,290 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 18 states. [2018-11-10 09:56:43,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:43,361 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-11-10 09:56:43,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 09:56:43,362 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2018-11-10 09:56:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:43,362 INFO L225 Difference]: With dead ends: 63 [2018-11-10 09:56:43,362 INFO L226 Difference]: Without dead ends: 62 [2018-11-10 09:56:43,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=549, Invalid=1173, Unknown=0, NotChecked=0, Total=1722 [2018-11-10 09:56:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-10 09:56:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2018-11-10 09:56:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-10 09:56:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-11-10 09:56:43,367 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 54 [2018-11-10 09:56:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:43,368 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-11-10 09:56:43,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 09:56:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-11-10 09:56:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-10 09:56:43,369 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:43,369 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:43,369 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:43,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:43,369 INFO L82 PathProgramCache]: Analyzing trace with hash -744568159, now seen corresponding path program 8 times [2018-11-10 09:56:43,369 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:43,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:43,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:43,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:43,370 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:43,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:43,568 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:43,569 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:43,569 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:43,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:43,569 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:43,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 09:56:43,575 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 09:56:43,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-10 09:56:43,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:43,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:43,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:43,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:43,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2018-11-10 09:56:43,857 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:43,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-10 09:56:43,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-10 09:56:43,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-11-10 09:56:43,859 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 20 states. [2018-11-10 09:56:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:43,949 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-11-10 09:56:43,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 09:56:43,949 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-11-10 09:56:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:43,950 INFO L225 Difference]: With dead ends: 69 [2018-11-10 09:56:43,950 INFO L226 Difference]: Without dead ends: 68 [2018-11-10 09:56:43,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=685, Invalid=1477, Unknown=0, NotChecked=0, Total=2162 [2018-11-10 09:56:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-10 09:56:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2018-11-10 09:56:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-10 09:56:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-11-10 09:56:43,955 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 60 [2018-11-10 09:56:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:43,955 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-11-10 09:56:43,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-10 09:56:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-11-10 09:56:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-10 09:56:43,956 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:43,956 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:43,956 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:43,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:43,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1783137591, now seen corresponding path program 9 times [2018-11-10 09:56:43,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:43,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:43,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:43,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:43,958 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:44,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:44,113 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:44,113 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:44,113 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:44,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:44,113 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:44,120 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 09:56:44,121 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 09:56:44,132 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 09:56:44,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:44,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:44,145 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:44,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:44,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2018-11-10 09:56:44,397 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:44,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 09:56:44,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 09:56:44,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-11-10 09:56:44,398 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 22 states. [2018-11-10 09:56:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:44,497 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-11-10 09:56:44,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-10 09:56:44,498 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 66 [2018-11-10 09:56:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:44,498 INFO L225 Difference]: With dead ends: 75 [2018-11-10 09:56:44,499 INFO L226 Difference]: Without dead ends: 74 [2018-11-10 09:56:44,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=836, Invalid=1816, Unknown=0, NotChecked=0, Total=2652 [2018-11-10 09:56:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-10 09:56:44,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-11-10 09:56:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-10 09:56:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-11-10 09:56:44,504 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 66 [2018-11-10 09:56:44,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:44,504 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-11-10 09:56:44,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 09:56:44,505 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-11-10 09:56:44,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 09:56:44,505 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:44,505 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:44,506 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:44,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash -467306675, now seen corresponding path program 10 times [2018-11-10 09:56:44,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:44,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:44,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:44,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:44,507 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:44,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:44,670 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:44,670 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:44,670 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:44,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:44,670 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:44,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:44,676 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 09:56:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:44,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:44,700 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:45,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:45,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2018-11-10 09:56:45,013 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:45,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 09:56:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 09:56:45,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-11-10 09:56:45,014 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 24 states. [2018-11-10 09:56:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:45,161 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-11-10 09:56:45,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-10 09:56:45,161 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2018-11-10 09:56:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:45,162 INFO L225 Difference]: With dead ends: 81 [2018-11-10 09:56:45,162 INFO L226 Difference]: Without dead ends: 80 [2018-11-10 09:56:45,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1002, Invalid=2190, Unknown=0, NotChecked=0, Total=3192 [2018-11-10 09:56:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-10 09:56:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2018-11-10 09:56:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-10 09:56:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-11-10 09:56:45,167 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 72 [2018-11-10 09:56:45,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:45,167 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-11-10 09:56:45,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 09:56:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-11-10 09:56:45,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-11-10 09:56:45,168 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:45,168 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:45,168 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:45,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:45,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1194458909, now seen corresponding path program 11 times [2018-11-10 09:56:45,169 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:45,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:45,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:45,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:45,170 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:45,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:45,379 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:45,379 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:45,379 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:45,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:45,379 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:45,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 09:56:45,385 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 09:56:45,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-10 09:56:45,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:45,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:45,421 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:45,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:45,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2018-11-10 09:56:45,792 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:45,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 09:56:45,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 09:56:45,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-11-10 09:56:45,793 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 26 states. [2018-11-10 09:56:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:45,927 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-11-10 09:56:45,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-10 09:56:45,927 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 78 [2018-11-10 09:56:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:45,928 INFO L225 Difference]: With dead ends: 87 [2018-11-10 09:56:45,928 INFO L226 Difference]: Without dead ends: 86 [2018-11-10 09:56:45,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1183, Invalid=2599, Unknown=0, NotChecked=0, Total=3782 [2018-11-10 09:56:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-10 09:56:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2018-11-10 09:56:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-10 09:56:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-11-10 09:56:45,933 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 78 [2018-11-10 09:56:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:45,933 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-11-10 09:56:45,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 09:56:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-11-10 09:56:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-11-10 09:56:45,934 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:45,934 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:45,935 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:45,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:45,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1542290951, now seen corresponding path program 12 times [2018-11-10 09:56:45,935 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:45,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:45,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:45,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:45,936 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:46,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:46,138 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:46,138 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:46,138 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:46,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:46,138 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:46,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 09:56:46,145 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 09:56:46,160 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 09:56:46,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:46,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:46,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:46,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:46,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2018-11-10 09:56:46,548 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:46,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-10 09:56:46,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-10 09:56:46,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-11-10 09:56:46,549 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 28 states. [2018-11-10 09:56:46,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:46,720 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-11-10 09:56:46,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-10 09:56:46,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 84 [2018-11-10 09:56:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:46,721 INFO L225 Difference]: With dead ends: 93 [2018-11-10 09:56:46,721 INFO L226 Difference]: Without dead ends: 92 [2018-11-10 09:56:46,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1379, Invalid=3043, Unknown=0, NotChecked=0, Total=4422 [2018-11-10 09:56:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-10 09:56:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2018-11-10 09:56:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-10 09:56:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-11-10 09:56:46,725 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 84 [2018-11-10 09:56:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:46,725 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-11-10 09:56:46,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-10 09:56:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-11-10 09:56:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-11-10 09:56:46,726 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:46,726 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:46,726 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:46,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:46,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1678026097, now seen corresponding path program 13 times [2018-11-10 09:56:46,727 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:46,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:46,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:46,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:46,728 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:46,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:46,989 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:46,989 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:46,989 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:46,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:46,990 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:46,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:46,999 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 09:56:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:47,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:47,027 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:47,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:47,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2018-11-10 09:56:47,459 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:47,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-10 09:56:47,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-10 09:56:47,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-11-10 09:56:47,460 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 30 states. [2018-11-10 09:56:47,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:47,615 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-11-10 09:56:47,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-10 09:56:47,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 90 [2018-11-10 09:56:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:47,616 INFO L225 Difference]: With dead ends: 99 [2018-11-10 09:56:47,616 INFO L226 Difference]: Without dead ends: 98 [2018-11-10 09:56:47,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2018-11-10 09:56:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-11-10 09:56:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-11-10 09:56:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-10 09:56:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-11-10 09:56:47,621 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 90 [2018-11-10 09:56:47,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:47,621 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-11-10 09:56:47,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-10 09:56:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-11-10 09:56:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-10 09:56:47,622 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:47,622 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:47,623 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:47,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:47,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1187572389, now seen corresponding path program 14 times [2018-11-10 09:56:47,623 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:47,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:47,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:47,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:47,624 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:47,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:47,921 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:47,922 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:47,922 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:47,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:47,922 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:47,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 09:56:47,927 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 09:56:47,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-11-10 09:56:47,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:47,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:47,974 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:48,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:48,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2018-11-10 09:56:48,462 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:48,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-10 09:56:48,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-10 09:56:48,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-11-10 09:56:48,463 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 32 states. [2018-11-10 09:56:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:48,621 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-11-10 09:56:48,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-10 09:56:48,622 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 96 [2018-11-10 09:56:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:48,622 INFO L225 Difference]: With dead ends: 105 [2018-11-10 09:56:48,622 INFO L226 Difference]: Without dead ends: 104 [2018-11-10 09:56:48,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1816, Invalid=4036, Unknown=0, NotChecked=0, Total=5852 [2018-11-10 09:56:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-11-10 09:56:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2018-11-10 09:56:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-11-10 09:56:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-11-10 09:56:48,626 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 96 [2018-11-10 09:56:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:48,627 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-11-10 09:56:48,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-10 09:56:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-11-10 09:56:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-10 09:56:48,627 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:48,627 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:48,628 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:48,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:48,628 INFO L82 PathProgramCache]: Analyzing trace with hash -252472773, now seen corresponding path program 15 times [2018-11-10 09:56:48,628 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:48,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:48,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:48,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:48,629 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:48,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:48,907 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:48,907 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:48,907 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:48,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:48,907 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:48,912 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 09:56:48,912 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 09:56:48,930 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 09:56:48,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:48,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:48,940 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:49,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:49,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2018-11-10 09:56:49,460 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:49,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-10 09:56:49,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-10 09:56:49,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-11-10 09:56:49,461 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 34 states. [2018-11-10 09:56:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:49,622 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-11-10 09:56:49,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-10 09:56:49,623 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 102 [2018-11-10 09:56:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:49,623 INFO L225 Difference]: With dead ends: 111 [2018-11-10 09:56:49,623 INFO L226 Difference]: Without dead ends: 110 [2018-11-10 09:56:49,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2057, Invalid=4585, Unknown=0, NotChecked=0, Total=6642 [2018-11-10 09:56:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-11-10 09:56:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2018-11-10 09:56:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-10 09:56:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-11-10 09:56:49,627 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 102 [2018-11-10 09:56:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:49,627 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-11-10 09:56:49,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-10 09:56:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-11-10 09:56:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-10 09:56:49,628 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:49,628 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:49,628 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:49,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash 53195089, now seen corresponding path program 16 times [2018-11-10 09:56:49,629 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:49,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:49,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:49,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:49,630 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:50,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:50,018 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:50,018 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:50,018 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:50,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:50,018 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:50,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:50,029 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 09:56:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:50,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:50,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:50,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:50,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2018-11-10 09:56:50,801 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:50,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-10 09:56:50,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-10 09:56:50,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-11-10 09:56:50,802 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 36 states. [2018-11-10 09:56:50,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:50,982 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-11-10 09:56:50,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-10 09:56:50,983 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 108 [2018-11-10 09:56:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:50,983 INFO L225 Difference]: With dead ends: 117 [2018-11-10 09:56:50,983 INFO L226 Difference]: Without dead ends: 116 [2018-11-10 09:56:50,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2313, Invalid=5169, Unknown=0, NotChecked=0, Total=7482 [2018-11-10 09:56:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-11-10 09:56:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2018-11-10 09:56:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-11-10 09:56:50,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-11-10 09:56:50,986 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 108 [2018-11-10 09:56:50,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:50,986 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-11-10 09:56:50,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-10 09:56:50,987 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-11-10 09:56:50,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-11-10 09:56:50,987 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:50,987 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:50,987 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:50,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:50,988 INFO L82 PathProgramCache]: Analyzing trace with hash -128342041, now seen corresponding path program 17 times [2018-11-10 09:56:50,988 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:50,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:50,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:50,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:50,989 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:51,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:51,345 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:51,345 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:51,345 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:51,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:51,345 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:51,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 09:56:51,350 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 09:56:51,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-10 09:56:51,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:51,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:51,410 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:52,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:52,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2018-11-10 09:56:52,056 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:52,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-10 09:56:52,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-10 09:56:52,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-11-10 09:56:52,057 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 38 states. [2018-11-10 09:56:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:52,262 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-11-10 09:56:52,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-10 09:56:52,262 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 114 [2018-11-10 09:56:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:52,263 INFO L225 Difference]: With dead ends: 123 [2018-11-10 09:56:52,263 INFO L226 Difference]: Without dead ends: 122 [2018-11-10 09:56:52,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2584, Invalid=5788, Unknown=0, NotChecked=0, Total=8372 [2018-11-10 09:56:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-11-10 09:56:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-11-10 09:56:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-10 09:56:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-11-10 09:56:52,267 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 114 [2018-11-10 09:56:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:52,267 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-11-10 09:56:52,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-10 09:56:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-11-10 09:56:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-11-10 09:56:52,268 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:52,268 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:52,268 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:52,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:52,268 INFO L82 PathProgramCache]: Analyzing trace with hash -744630787, now seen corresponding path program 18 times [2018-11-10 09:56:52,268 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:52,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:52,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:52,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:52,269 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:52,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:52,633 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:52,633 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:52,633 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:52,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:52,634 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:52,640 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 09:56:52,640 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 09:56:52,662 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 09:56:52,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:52,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:52,681 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:53,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:53,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 77 [2018-11-10 09:56:53,465 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:53,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-10 09:56:53,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-10 09:56:53,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-11-10 09:56:53,466 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 40 states. [2018-11-10 09:56:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:53,716 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-11-10 09:56:53,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-10 09:56:53,716 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 120 [2018-11-10 09:56:53,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:53,716 INFO L225 Difference]: With dead ends: 129 [2018-11-10 09:56:53,716 INFO L226 Difference]: Without dead ends: 128 [2018-11-10 09:56:53,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2870, Invalid=6442, Unknown=0, NotChecked=0, Total=9312 [2018-11-10 09:56:53,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-11-10 09:56:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2018-11-10 09:56:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-10 09:56:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-11-10 09:56:53,719 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 120 [2018-11-10 09:56:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:53,719 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-11-10 09:56:53,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-10 09:56:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-11-10 09:56:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-10 09:56:53,720 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:53,720 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:53,720 INFO L424 AbstractCegarLoop]: === Iteration 22 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:53,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:53,720 INFO L82 PathProgramCache]: Analyzing trace with hash 374381459, now seen corresponding path program 19 times [2018-11-10 09:56:53,720 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:53,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:53,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:53,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:53,721 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:54,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:54,108 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:54,108 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:54,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:54,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:54,108 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:54,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:54,116 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 09:56:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:54,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:54,163 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:54,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:54,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2018-11-10 09:56:54,964 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:54,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-10 09:56:54,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-10 09:56:54,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-11-10 09:56:54,966 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 42 states. [2018-11-10 09:56:55,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:55,245 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-11-10 09:56:55,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-10 09:56:55,245 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 126 [2018-11-10 09:56:55,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:55,245 INFO L225 Difference]: With dead ends: 135 [2018-11-10 09:56:55,246 INFO L226 Difference]: Without dead ends: 134 [2018-11-10 09:56:55,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3171, Invalid=7131, Unknown=0, NotChecked=0, Total=10302 [2018-11-10 09:56:55,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-10 09:56:55,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2018-11-10 09:56:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-10 09:56:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-11-10 09:56:55,250 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 126 [2018-11-10 09:56:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:55,250 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-11-10 09:56:55,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-10 09:56:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-11-10 09:56:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-10 09:56:55,251 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:55,251 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:55,251 INFO L424 AbstractCegarLoop]: === Iteration 23 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:55,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:55,252 INFO L82 PathProgramCache]: Analyzing trace with hash 906123433, now seen corresponding path program 20 times [2018-11-10 09:56:55,252 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:55,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:55,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:55,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:55,252 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:55,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:55,634 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:55,634 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:55,634 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:55,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:55,634 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:55,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 09:56:55,639 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 09:56:55,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-11-10 09:56:55,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:55,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:55,707 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:56,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:56,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 85 [2018-11-10 09:56:56,570 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:56,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-10 09:56:56,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-10 09:56:56,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-11-10 09:56:56,571 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 44 states. [2018-11-10 09:56:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:56,847 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-11-10 09:56:56,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-10 09:56:56,848 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 132 [2018-11-10 09:56:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:56,848 INFO L225 Difference]: With dead ends: 141 [2018-11-10 09:56:56,848 INFO L226 Difference]: Without dead ends: 140 [2018-11-10 09:56:56,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3487, Invalid=7855, Unknown=0, NotChecked=0, Total=11342 [2018-11-10 09:56:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-11-10 09:56:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2018-11-10 09:56:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-10 09:56:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-11-10 09:56:56,852 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 132 [2018-11-10 09:56:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:56,853 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-11-10 09:56:56,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-10 09:56:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-11-10 09:56:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-11-10 09:56:56,854 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:56,854 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:56,854 INFO L424 AbstractCegarLoop]: === Iteration 24 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:56,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:56,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1837404865, now seen corresponding path program 21 times [2018-11-10 09:56:56,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:56,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:56,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:56,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:56,855 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:57,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:57,271 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:57,271 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:57,271 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:57,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:57,271 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:57,276 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 09:56:57,276 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 09:56:57,296 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 09:56:57,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:56:57,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:57,311 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:56:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:58,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:56:58,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 89 [2018-11-10 09:56:58,259 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:56:58,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-10 09:56:58,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-10 09:56:58,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-11-10 09:56:58,259 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 46 states. [2018-11-10 09:56:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:56:58,546 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-11-10 09:56:58,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-10 09:56:58,546 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 138 [2018-11-10 09:56:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:56:58,547 INFO L225 Difference]: With dead ends: 147 [2018-11-10 09:56:58,547 INFO L226 Difference]: Without dead ends: 146 [2018-11-10 09:56:58,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3818, Invalid=8614, Unknown=0, NotChecked=0, Total=12432 [2018-11-10 09:56:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-11-10 09:56:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-11-10 09:56:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-11-10 09:56:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-11-10 09:56:58,550 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 138 [2018-11-10 09:56:58,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:56:58,550 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-11-10 09:56:58,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-10 09:56:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-11-10 09:56:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-11-10 09:56:58,553 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:56:58,554 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:56:58,554 INFO L424 AbstractCegarLoop]: === Iteration 25 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:56:58,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:56:58,554 INFO L82 PathProgramCache]: Analyzing trace with hash -339986091, now seen corresponding path program 22 times [2018-11-10 09:56:58,554 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:56:58,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:58,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:56:58,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:56:58,555 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:56:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:59,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:59,055 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:56:59,055 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:56:59,056 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:56:59,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:56:59,056 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:56:59,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:56:59,064 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 09:56:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:56:59,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:56:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:56:59,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:57:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:00,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:57:00,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2018-11-10 09:57:00,126 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:57:00,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-10 09:57:00,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-10 09:57:00,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-11-10 09:57:00,127 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 48 states. [2018-11-10 09:57:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:57:00,435 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-11-10 09:57:00,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-10 09:57:00,435 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 144 [2018-11-10 09:57:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:57:00,436 INFO L225 Difference]: With dead ends: 153 [2018-11-10 09:57:00,436 INFO L226 Difference]: Without dead ends: 152 [2018-11-10 09:57:00,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4164, Invalid=9408, Unknown=0, NotChecked=0, Total=13572 [2018-11-10 09:57:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-11-10 09:57:00,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2018-11-10 09:57:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-11-10 09:57:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-11-10 09:57:00,441 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 144 [2018-11-10 09:57:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:57:00,441 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-11-10 09:57:00,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-10 09:57:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-11-10 09:57:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-10 09:57:00,442 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:57:00,442 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:57:00,442 INFO L424 AbstractCegarLoop]: === Iteration 26 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:57:00,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:57:00,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1476205803, now seen corresponding path program 23 times [2018-11-10 09:57:00,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:57:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:00,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:57:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:00,444 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:57:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:57:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 0 proven. 1633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:00,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:00,957 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:57:00,957 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:57:00,957 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:57:00,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:00,957 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:57:00,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 09:57:00,964 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 09:57:01,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-11-10 09:57:01,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:57:01,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:57:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 0 proven. 1633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:01,054 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:57:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 0 proven. 1633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:02,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:57:02,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2018-11-10 09:57:02,159 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:57:02,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-10 09:57:02,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-10 09:57:02,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-11-10 09:57:02,160 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 50 states. [2018-11-10 09:57:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:57:02,502 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-11-10 09:57:02,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-10 09:57:02,502 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 150 [2018-11-10 09:57:02,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:57:02,503 INFO L225 Difference]: With dead ends: 159 [2018-11-10 09:57:02,503 INFO L226 Difference]: Without dead ends: 158 [2018-11-10 09:57:02,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4525, Invalid=10237, Unknown=0, NotChecked=0, Total=14762 [2018-11-10 09:57:02,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-11-10 09:57:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2018-11-10 09:57:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-11-10 09:57:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-11-10 09:57:02,507 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 150 [2018-11-10 09:57:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:57:02,507 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-11-10 09:57:02,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-10 09:57:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-11-10 09:57:02,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-11-10 09:57:02,508 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:57:02,508 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:57:02,508 INFO L424 AbstractCegarLoop]: === Iteration 27 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:57:02,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:57:02,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1179748351, now seen corresponding path program 24 times [2018-11-10 09:57:02,509 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:57:02,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:02,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:57:02,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:02,510 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:57:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:57:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:03,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:03,031 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:57:03,032 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:57:03,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:57:03,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:03,032 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:57:03,038 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 09:57:03,038 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 09:57:03,060 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 09:57:03,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:57:03,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:57:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:03,085 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:57:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:04,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:57:04,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2018-11-10 09:57:04,320 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:57:04,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-10 09:57:04,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-10 09:57:04,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-11-10 09:57:04,320 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 52 states. [2018-11-10 09:57:04,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:57:04,678 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-11-10 09:57:04,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-10 09:57:04,678 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 156 [2018-11-10 09:57:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:57:04,679 INFO L225 Difference]: With dead ends: 165 [2018-11-10 09:57:04,679 INFO L226 Difference]: Without dead ends: 164 [2018-11-10 09:57:04,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3277 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4901, Invalid=11101, Unknown=0, NotChecked=0, Total=16002 [2018-11-10 09:57:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-11-10 09:57:04,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2018-11-10 09:57:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-11-10 09:57:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-11-10 09:57:04,684 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 156 [2018-11-10 09:57:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:57:04,685 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-11-10 09:57:04,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-10 09:57:04,685 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-11-10 09:57:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-11-10 09:57:04,686 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:57:04,686 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:57:04,686 INFO L424 AbstractCegarLoop]: === Iteration 28 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:57:04,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:57:04,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1250383209, now seen corresponding path program 25 times [2018-11-10 09:57:04,686 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:57:04,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:04,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:57:04,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:04,687 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:57:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:57:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 0 proven. 1925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:05,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:05,277 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:57:05,277 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:57:05,278 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:57:05,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:05,278 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:57:05,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:57:05,284 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 09:57:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:57:05,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:57:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 0 proven. 1925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:05,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:57:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 0 proven. 1925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:06,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:57:06,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2018-11-10 09:57:06,697 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:57:06,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-11-10 09:57:06,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-11-10 09:57:06,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-11-10 09:57:06,699 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 54 states. [2018-11-10 09:57:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:57:07,062 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-11-10 09:57:07,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-10 09:57:07,062 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 162 [2018-11-10 09:57:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:57:07,063 INFO L225 Difference]: With dead ends: 171 [2018-11-10 09:57:07,063 INFO L226 Difference]: Without dead ends: 170 [2018-11-10 09:57:07,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5292, Invalid=12000, Unknown=0, NotChecked=0, Total=17292 [2018-11-10 09:57:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-11-10 09:57:07,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2018-11-10 09:57:07,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-11-10 09:57:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-11-10 09:57:07,067 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 162 [2018-11-10 09:57:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:57:07,067 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-11-10 09:57:07,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-11-10 09:57:07,067 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-11-10 09:57:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-11-10 09:57:07,068 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:57:07,068 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:57:07,068 INFO L424 AbstractCegarLoop]: === Iteration 29 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:57:07,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:57:07,069 INFO L82 PathProgramCache]: Analyzing trace with hash 675026093, now seen corresponding path program 26 times [2018-11-10 09:57:07,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:57:07,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:07,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:57:07,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:07,069 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:57:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:57:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:07,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:07,741 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:57:07,741 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:57:07,741 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:57:07,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:07,741 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:57:07,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 09:57:07,753 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 09:57:07,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-11-10 09:57:07,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:57:07,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:57:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:07,860 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:57:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:09,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:57:09,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 109 [2018-11-10 09:57:09,298 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:57:09,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-10 09:57:09,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-10 09:57:09,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-11-10 09:57:09,299 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 56 states. [2018-11-10 09:57:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:57:09,712 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-11-10 09:57:09,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-10 09:57:09,712 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 168 [2018-11-10 09:57:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:57:09,713 INFO L225 Difference]: With dead ends: 177 [2018-11-10 09:57:09,713 INFO L226 Difference]: Without dead ends: 176 [2018-11-10 09:57:09,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3836 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5698, Invalid=12934, Unknown=0, NotChecked=0, Total=18632 [2018-11-10 09:57:09,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-11-10 09:57:09,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2018-11-10 09:57:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-11-10 09:57:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-11-10 09:57:09,716 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 168 [2018-11-10 09:57:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:57:09,717 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-11-10 09:57:09,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-10 09:57:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-11-10 09:57:09,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-10 09:57:09,717 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:57:09,718 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:57:09,718 INFO L424 AbstractCegarLoop]: === Iteration 30 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:57:09,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:57:09,718 INFO L82 PathProgramCache]: Analyzing trace with hash 487659075, now seen corresponding path program 27 times [2018-11-10 09:57:09,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:57:09,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:09,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:57:09,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:09,719 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:57:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:57:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 0 proven. 2241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:10,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:10,403 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:57:10,403 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:57:10,403 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:57:10,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:10,403 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:57:10,408 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 09:57:10,408 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 09:57:10,449 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 09:57:10,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:57:10,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:57:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 0 proven. 2241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:10,483 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:57:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 0 proven. 2241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:11,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:57:11,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 113 [2018-11-10 09:57:11,993 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:57:11,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-11-10 09:57:11,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-11-10 09:57:11,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-11-10 09:57:11,994 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 58 states. [2018-11-10 09:57:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:57:12,454 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-11-10 09:57:12,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-10 09:57:12,454 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 174 [2018-11-10 09:57:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:57:12,455 INFO L225 Difference]: With dead ends: 183 [2018-11-10 09:57:12,455 INFO L226 Difference]: Without dead ends: 182 [2018-11-10 09:57:12,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6119, Invalid=13903, Unknown=0, NotChecked=0, Total=20022 [2018-11-10 09:57:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-11-10 09:57:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2018-11-10 09:57:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-11-10 09:57:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-11-10 09:57:12,460 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 174 [2018-11-10 09:57:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:57:12,460 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-11-10 09:57:12,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-11-10 09:57:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-11-10 09:57:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-11-10 09:57:12,461 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:57:12,461 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:57:12,461 INFO L424 AbstractCegarLoop]: === Iteration 31 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:57:12,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:57:12,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1128795993, now seen corresponding path program 28 times [2018-11-10 09:57:12,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:57:12,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:12,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:57:12,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:12,463 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:57:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:57:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:13,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:13,212 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:57:13,212 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:57:13,212 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:57:13,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:13,212 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:57:13,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:57:13,219 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 09:57:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:57:13,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:57:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:13,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:57:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:14,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:57:14,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 117 [2018-11-10 09:57:14,878 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:57:14,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-10 09:57:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-10 09:57:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-11-10 09:57:14,880 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 60 states. [2018-11-10 09:57:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:57:15,342 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-11-10 09:57:15,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-10 09:57:15,342 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 180 [2018-11-10 09:57:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:57:15,343 INFO L225 Difference]: With dead ends: 189 [2018-11-10 09:57:15,343 INFO L226 Difference]: Without dead ends: 188 [2018-11-10 09:57:15,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4439 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6555, Invalid=14907, Unknown=0, NotChecked=0, Total=21462 [2018-11-10 09:57:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-11-10 09:57:15,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2018-11-10 09:57:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-11-10 09:57:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-11-10 09:57:15,348 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 180 [2018-11-10 09:57:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:57:15,349 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-11-10 09:57:15,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-10 09:57:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-11-10 09:57:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-10 09:57:15,350 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:57:15,350 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:57:15,350 INFO L424 AbstractCegarLoop]: === Iteration 32 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:57:15,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:57:15,350 INFO L82 PathProgramCache]: Analyzing trace with hash -462856209, now seen corresponding path program 29 times [2018-11-10 09:57:15,350 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:57:15,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:15,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 09:57:15,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:15,351 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:57:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:57:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 0 proven. 2581 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:16,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:16,280 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 09:57:16,281 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 09:57:16,281 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 09:57:16,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 09:57:16,281 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 09:57:16,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 09:57:16,288 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 09:57:16,394 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-11-10 09:57:16,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 09:57:16,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 09:57:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 0 proven. 2581 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:16,417 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 09:57:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 0 proven. 2581 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:18,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 09:57:18,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 121 [2018-11-10 09:57:18,107 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 09:57:18,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-10 09:57:18,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-10 09:57:18,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-11-10 09:57:18,108 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 62 states. [2018-11-10 09:57:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:57:18,585 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-11-10 09:57:18,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-11-10 09:57:18,585 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 186 [2018-11-10 09:57:18,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:57:18,586 INFO L225 Difference]: With dead ends: 195 [2018-11-10 09:57:18,586 INFO L226 Difference]: Without dead ends: 194 [2018-11-10 09:57:18,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4757 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7006, Invalid=15946, Unknown=0, NotChecked=0, Total=22952 [2018-11-10 09:57:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-11-10 09:57:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2018-11-10 09:57:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-11-10 09:57:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-11-10 09:57:18,592 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 186 [2018-11-10 09:57:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:57:18,592 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-11-10 09:57:18,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-10 09:57:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-11-10 09:57:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-11-10 09:57:18,593 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 09:57:18,593 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 09:57:18,593 INFO L424 AbstractCegarLoop]: === Iteration 33 === [mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-10 09:57:18,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 09:57:18,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1513449477, now seen corresponding path program 30 times [2018-11-10 09:57:18,593 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 09:57:18,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:18,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 09:57:18,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 09:57:18,594 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 09:57:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 09:57:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 2760 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 09:57:20,862 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 09:57:20,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2018-11-10 09:57:20,862 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 09:57:20,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-11-10 09:57:20,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-11-10 09:57:20,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=6013, Unknown=0, NotChecked=0, Total=8930 [2018-11-10 09:57:20,863 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 95 states. [2018-11-10 09:57:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 09:57:21,641 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-11-10 09:57:21,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-11-10 09:57:21,641 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 192 [2018-11-10 09:57:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 09:57:21,641 INFO L225 Difference]: With dead ends: 196 [2018-11-10 09:57:21,641 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 09:57:21,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6614 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6850, Invalid=17330, Unknown=0, NotChecked=0, Total=24180 [2018-11-10 09:57:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 09:57:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 09:57:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 09:57:21,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 09:57:21,643 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 192 [2018-11-10 09:57:21,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 09:57:21,643 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 09:57:21,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-11-10 09:57:21,643 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 09:57:21,643 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 09:57:21,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 09:57:22,012 WARN L179 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 158 [2018-11-10 09:57:22,016 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 09:57:22,016 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 09:57:22,016 INFO L425 ceAbstractionStarter]: For program point mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 9) no Hoare annotation was computed. [2018-11-10 09:57:22,016 INFO L425 ceAbstractionStarter]: For program point mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 9) no Hoare annotation was computed. [2018-11-10 09:57:22,016 INFO L425 ceAbstractionStarter]: For program point mlogFINAL(lines 3 16) no Hoare annotation was computed. [2018-11-10 09:57:22,016 INFO L425 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-11-10 09:57:22,017 INFO L425 ceAbstractionStarter]: For program point L9(line 9) no Hoare annotation was computed. [2018-11-10 09:57:22,017 INFO L425 ceAbstractionStarter]: For program point mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2018-11-10 09:57:22,017 INFO L425 ceAbstractionStarter]: For program point L10-1(line 10) no Hoare annotation was computed. [2018-11-10 09:57:22,017 INFO L425 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2018-11-10 09:57:22,017 INFO L425 ceAbstractionStarter]: For program point mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2018-11-10 09:57:22,017 INFO L425 ceAbstractionStarter]: For program point L7-1(lines 7 12) no Hoare annotation was computed. [2018-11-10 09:57:22,017 INFO L425 ceAbstractionStarter]: For program point mlogEXIT(lines 3 16) no Hoare annotation was computed. [2018-11-10 09:57:22,018 INFO L421 ceAbstractionStarter]: At program point L7-3(lines 7 12) the Hoare annotation is: (let ((.cse1 (div mlog_~x 2)) (.cse0 (< 0 (+ mlog_~x 1))) (.cse2 (<= 0 mlog_~res~0))) (or (and (<= mlog_~res~0 22) .cse0 (<= .cse1 255) .cse2) (and (<= mlog_~res~0 19) .cse0 (<= .cse1 2047) .cse2) (and (<= .cse1 16777215) .cse0 (<= mlog_~res~0 6) .cse2) (< 2147483647 |mlog_#in~x|) (and (<= mlog_~x 2147483647) (<= mlog_~res~0 0) .cse2) (and (<= .cse1 7) .cse0 (<= mlog_~res~0 27) .cse2) (and .cse0 (<= mlog_~res~0 8) (<= .cse1 4194303) .cse2) (and (<= mlog_~res~0 18) .cse0 .cse2 (<= .cse1 4095)) (and .cse0 (<= mlog_~res~0 13) (<= .cse1 131071) .cse2) (and (<= mlog_~res~0 20) .cse0 .cse2 (<= .cse1 1023)) (and (<= mlog_~res~0 28) .cse0 (<= .cse1 3) .cse2) (and (<= mlog_~res~0 1) .cse0 (<= .cse1 536870911) .cse2) (and .cse0 (<= mlog_~res~0 26) (<= .cse1 15) .cse2) (and .cse0 (<= mlog_~res~0 15) (<= .cse1 32767) .cse2) (and .cse0 (<= mlog_~res~0 24) .cse2 (<= .cse1 63)) (and (<= .cse1 33554431) .cse0 (<= mlog_~res~0 5) .cse2) (and (<= mlog_~res~0 3) .cse0 (<= .cse1 134217727) .cse2) (and .cse0 (<= mlog_~res~0 11) (<= .cse1 524287) .cse2) (and (<= .cse1 1048575) (<= mlog_~res~0 10) .cse0 .cse2) (and .cse0 (<= .cse1 8388607) .cse2 (<= mlog_~res~0 7)) (and .cse0 (<= .cse1 2097151) .cse2 (<= mlog_~res~0 9)) (and (<= mlog_~res~0 23) .cse0 (<= .cse1 127) .cse2) (and .cse0 (<= .cse1 67108863) (<= mlog_~res~0 4) .cse2) (and (<= mlog_~res~0 21) (<= .cse1 511) .cse0 .cse2) (and (<= mlog_~res~0 16) .cse0 .cse2 (<= .cse1 16383)) (and (<= mlog_~res~0 2) .cse0 .cse2 (<= .cse1 268435455)) (and .cse0 (<= .cse1 8191) (<= mlog_~res~0 17) .cse2) (and (<= .cse1 1) (<= mlog_~res~0 29) .cse0 .cse2) (and .cse0 .cse2 (<= mlog_~x 1)) (and (<= mlog_~res~0 25) .cse0 .cse2 (<= .cse1 31)) (and (<= .cse1 65535) .cse0 .cse2 (<= mlog_~res~0 14)) (and (<= .cse1 262143) .cse0 (<= mlog_~res~0 12) .cse2))) [2018-11-10 09:57:22,018 INFO L425 ceAbstractionStarter]: For program point L7-4(lines 7 12) no Hoare annotation was computed. [2018-11-10 09:57:22,018 INFO L428 ceAbstractionStarter]: At program point mlogENTRY(lines 3 16) the Hoare annotation is: true [2018-11-10 09:57:22,018 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 09:57:22,018 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 09:57:22,018 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 09:57:22,018 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 09:57:22,018 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 18 20) the Hoare annotation is: true [2018-11-10 09:57:22,018 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 18 20) no Hoare annotation was computed. [2018-11-10 09:57:22,018 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 18 20) no Hoare annotation was computed. [2018-11-10 09:57:22,018 INFO L421 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (<= |main_#t~nondet1| 2147483647) [2018-11-10 09:57:22,019 INFO L425 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-11-10 09:57:22,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 09:57:22 BoogieIcfgContainer [2018-11-10 09:57:22,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 09:57:22,035 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 09:57:22,035 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 09:57:22,037 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 09:57:22,038 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 09:56:40" (3/4) ... [2018-11-10 09:57:22,042 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 09:57:22,047 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 09:57:22,047 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure mlog [2018-11-10 09:57:22,048 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 09:57:22,051 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-10 09:57:22,051 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-10 09:57:22,051 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 09:57:22,074 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((((((((((((((((((((res <= 22 && 0 < x + 1) && x / 2 <= 255) && 0 <= res) || (((res <= 19 && 0 < x + 1) && x / 2 <= 2047) && 0 <= res)) || (((x / 2 <= 16777215 && 0 < x + 1) && res <= 6) && 0 <= res)) || 2147483647 < \old(x)) || ((x <= 2147483647 && res <= 0) && 0 <= res)) || (((x / 2 <= 7 && 0 < x + 1) && res <= 27) && 0 <= res)) || (((0 < x + 1 && res <= 8) && x / 2 <= 4194303) && 0 <= res)) || (((res <= 18 && 0 < x + 1) && 0 <= res) && x / 2 <= 4095)) || (((0 < x + 1 && res <= 13) && x / 2 <= 131071) && 0 <= res)) || (((res <= 20 && 0 < x + 1) && 0 <= res) && x / 2 <= 1023)) || (((res <= 28 && 0 < x + 1) && x / 2 <= 3) && 0 <= res)) || (((res <= 1 && 0 < x + 1) && x / 2 <= 536870911) && 0 <= res)) || (((0 < x + 1 && res <= 26) && x / 2 <= 15) && 0 <= res)) || (((0 < x + 1 && res <= 15) && x / 2 <= 32767) && 0 <= res)) || (((0 < x + 1 && res <= 24) && 0 <= res) && x / 2 <= 63)) || (((x / 2 <= 33554431 && 0 < x + 1) && res <= 5) && 0 <= res)) || (((res <= 3 && 0 < x + 1) && x / 2 <= 134217727) && 0 <= res)) || (((0 < x + 1 && res <= 11) && x / 2 <= 524287) && 0 <= res)) || (((x / 2 <= 1048575 && res <= 10) && 0 < x + 1) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 8388607) && 0 <= res) && res <= 7)) || (((0 < x + 1 && x / 2 <= 2097151) && 0 <= res) && res <= 9)) || (((res <= 23 && 0 < x + 1) && x / 2 <= 127) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 67108863) && res <= 4) && 0 <= res)) || (((res <= 21 && x / 2 <= 511) && 0 < x + 1) && 0 <= res)) || (((res <= 16 && 0 < x + 1) && 0 <= res) && x / 2 <= 16383)) || (((res <= 2 && 0 < x + 1) && 0 <= res) && x / 2 <= 268435455)) || (((0 < x + 1 && x / 2 <= 8191) && res <= 17) && 0 <= res)) || (((x / 2 <= 1 && res <= 29) && 0 < x + 1) && 0 <= res)) || ((0 < x + 1 && 0 <= res) && x <= 1)) || (((res <= 25 && 0 < x + 1) && 0 <= res) && x / 2 <= 31)) || (((x / 2 <= 65535 && 0 < x + 1) && 0 <= res) && res <= 14)) || (((x / 2 <= 262143 && 0 < x + 1) && res <= 12) && 0 <= res) [2018-11-10 09:57:22,082 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b5dfde72-0ad2-41e8-a4a5-c10c77b4954c/bin-2019/utaipan/witness.graphml [2018-11-10 09:57:22,083 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 09:57:22,083 INFO L168 Benchmark]: Toolchain (without parser) took 42125.18 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 645.4 MB). Free memory was 959.2 MB in the beginning and 1.4 GB in the end (delta: -444.3 MB). Peak memory consumption was 201.1 MB. Max. memory is 11.5 GB. [2018-11-10 09:57:22,084 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 09:57:22,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 132.71 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-10 09:57:22,084 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.63 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 09:57:22,084 INFO L168 Benchmark]: Boogie Preprocessor took 16.32 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 09:57:22,085 INFO L168 Benchmark]: RCFGBuilder took 200.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.3 MB). Free memory was 948.4 MB in the beginning and 1.2 GB in the end (delta: -216.0 MB). Peak memory consumption was 22.6 MB. Max. memory is 11.5 GB. [2018-11-10 09:57:22,085 INFO L168 Benchmark]: TraceAbstraction took 41711.81 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 467.1 MB). Free memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: -254.9 MB). Peak memory consumption was 212.2 MB. Max. memory is 11.5 GB. [2018-11-10 09:57:22,085 INFO L168 Benchmark]: Witness Printer took 47.77 ms. Allocated memory is still 1.7 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 11.5 GB. [2018-11-10 09:57:22,087 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 132.71 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.63 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.32 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 200.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.3 MB). Free memory was 948.4 MB in the beginning and 1.2 GB in the end (delta: -216.0 MB). Peak memory consumption was 22.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 41711.81 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 467.1 MB). Free memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: -254.9 MB). Peak memory consumption was 212.2 MB. Max. memory is 11.5 GB. * Witness Printer took 47.77 ms. Allocated memory is still 1.7 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 10]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 10]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 9]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((res <= 22 && 0 < x + 1) && x / 2 <= 255) && 0 <= res) || (((res <= 19 && 0 < x + 1) && x / 2 <= 2047) && 0 <= res)) || (((x / 2 <= 16777215 && 0 < x + 1) && res <= 6) && 0 <= res)) || 2147483647 < \old(x)) || ((x <= 2147483647 && res <= 0) && 0 <= res)) || (((x / 2 <= 7 && 0 < x + 1) && res <= 27) && 0 <= res)) || (((0 < x + 1 && res <= 8) && x / 2 <= 4194303) && 0 <= res)) || (((res <= 18 && 0 < x + 1) && 0 <= res) && x / 2 <= 4095)) || (((0 < x + 1 && res <= 13) && x / 2 <= 131071) && 0 <= res)) || (((res <= 20 && 0 < x + 1) && 0 <= res) && x / 2 <= 1023)) || (((res <= 28 && 0 < x + 1) && x / 2 <= 3) && 0 <= res)) || (((res <= 1 && 0 < x + 1) && x / 2 <= 536870911) && 0 <= res)) || (((0 < x + 1 && res <= 26) && x / 2 <= 15) && 0 <= res)) || (((0 < x + 1 && res <= 15) && x / 2 <= 32767) && 0 <= res)) || (((0 < x + 1 && res <= 24) && 0 <= res) && x / 2 <= 63)) || (((x / 2 <= 33554431 && 0 < x + 1) && res <= 5) && 0 <= res)) || (((res <= 3 && 0 < x + 1) && x / 2 <= 134217727) && 0 <= res)) || (((0 < x + 1 && res <= 11) && x / 2 <= 524287) && 0 <= res)) || (((x / 2 <= 1048575 && res <= 10) && 0 < x + 1) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 8388607) && 0 <= res) && res <= 7)) || (((0 < x + 1 && x / 2 <= 2097151) && 0 <= res) && res <= 9)) || (((res <= 23 && 0 < x + 1) && x / 2 <= 127) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 67108863) && res <= 4) && 0 <= res)) || (((res <= 21 && x / 2 <= 511) && 0 < x + 1) && 0 <= res)) || (((res <= 16 && 0 < x + 1) && 0 <= res) && x / 2 <= 16383)) || (((res <= 2 && 0 < x + 1) && 0 <= res) && x / 2 <= 268435455)) || (((0 < x + 1 && x / 2 <= 8191) && res <= 17) && 0 <= res)) || (((x / 2 <= 1 && res <= 29) && 0 < x + 1) && 0 <= res)) || ((0 < x + 1 && 0 <= res) && x <= 1)) || (((res <= 25 && 0 < x + 1) && 0 <= res) && x / 2 <= 31)) || (((x / 2 <= 65535 && 0 < x + 1) && 0 <= res) && res <= 14)) || (((x / 2 <= 262143 && 0 < x + 1) && res <= 12) && 0 <= res) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 4 error locations. SAFE Result, 41.6s OverallTime, 33 OverallIterations, 31 TraceHistogramMax, 7.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 454 SDtfs, 1859 SDslu, 7845 SDs, 0 SdLazy, 3430 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7479 GetRequests, 4993 SyntacticMatches, 0 SemanticMatches, 2486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55653 ImplicationChecksByTransitivity, 34.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=193occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 33 MinimizatonAttempts, 31 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 38 NumberOfFragments, 528 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 183 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 31.2s InterpolantComputationTime, 6143 NumberOfCodeBlocks, 6143 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 9010 ConstructedInterpolants, 0 QuantifiedInterpolants, 3390992 SizeOfPredicates, 464 NumberOfNonLiveVariables, 6061 ConjunctsInSsa, 957 ConjunctsInUnsatCore, 91 InterpolantComputations, 4 PerfectInterpolantSequences, 2760/82365 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...