./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination4_false-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_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination4_false-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 94b61e96441ca10668b436b4ef10dfd9464f0863 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 05:49:14,681 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 05:49:14,683 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 05:49:14,693 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 05:49:14,693 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 05:49:14,694 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 05:49:14,695 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 05:49:14,696 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 05:49:14,698 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 05:49:14,699 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 05:49:14,700 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 05:49:14,700 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 05:49:14,701 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 05:49:14,702 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 05:49:14,702 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 05:49:14,703 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 05:49:14,705 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 05:49:14,706 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 05:49:14,708 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 05:49:14,709 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 05:49:14,710 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 05:49:14,712 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 05:49:14,714 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 05:49:14,714 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 05:49:14,714 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 05:49:14,715 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 05:49:14,716 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 05:49:14,717 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 05:49:14,718 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 05:49:14,718 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 05:49:14,719 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 05:49:14,719 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 05:49:14,720 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 05:49:14,720 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 05:49:14,721 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 05:49:14,722 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 05:49:14,722 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-10-27 05:49:14,734 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 05:49:14,734 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 05:49:14,735 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 05:49:14,736 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 05:49:14,736 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 05:49:14,736 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 05:49:14,736 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 05:49:14,736 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 05:49:14,736 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 05:49:14,737 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 05:49:14,737 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 05:49:14,737 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 05:49:14,737 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 05:49:14,738 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 05:49:14,738 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 05:49:14,738 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 05:49:14,738 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 05:49:14,738 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 05:49:14,738 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-10-27 05:49:14,738 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 05:49:14,739 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 05:49:14,739 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 05:49:14,739 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 05:49:14,741 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 05:49:14,741 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 05:49:14,742 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 05:49:14,742 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 05:49:14,742 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 05:49:14,742 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 05:49:14,742 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 05:49:14,742 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 05:49:14,743 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 05:49:14,743 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 05:49:14,743 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_f22fb2dd-72a7-427f-b692-930703479c9f/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 -> 94b61e96441ca10668b436b4ef10dfd9464f0863 [2018-10-27 05:49:14,773 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 05:49:14,783 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 05:49:14,786 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 05:49:14,788 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 05:49:14,788 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 05:49:14,789 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted/NonTermination4_false-no-overflow.c [2018-10-27 05:49:14,843 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/data/554d9e5c8/5cb2bfd184564fbd99e43df4a3f5bd5d/FLAG05f17654e [2018-10-27 05:49:15,229 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 05:49:15,230 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/sv-benchmarks/c/termination-crafted/NonTermination4_false-no-overflow.c [2018-10-27 05:49:15,235 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/data/554d9e5c8/5cb2bfd184564fbd99e43df4a3f5bd5d/FLAG05f17654e [2018-10-27 05:49:15,247 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/data/554d9e5c8/5cb2bfd184564fbd99e43df4a3f5bd5d [2018-10-27 05:49:15,250 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 05:49:15,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 05:49:15,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 05:49:15,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 05:49:15,257 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 05:49:15,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:49:15" (1/1) ... [2018-10-27 05:49:15,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67ed68ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15, skipping insertion in model container [2018-10-27 05:49:15,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:49:15" (1/1) ... [2018-10-27 05:49:15,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 05:49:15,293 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 05:49:15,410 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:49:15,412 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 05:49:15,420 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:49:15,428 INFO L193 MainTranslator]: Completed translation [2018-10-27 05:49:15,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15 WrapperNode [2018-10-27 05:49:15,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 05:49:15,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 05:49:15,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 05:49:15,430 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 05:49:15,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15" (1/1) ... [2018-10-27 05:49:15,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15" (1/1) ... [2018-10-27 05:49:15,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 05:49:15,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 05:49:15,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 05:49:15,447 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 05:49:15,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15" (1/1) ... [2018-10-27 05:49:15,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15" (1/1) ... [2018-10-27 05:49:15,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15" (1/1) ... [2018-10-27 05:49:15,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15" (1/1) ... [2018-10-27 05:49:15,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15" (1/1) ... [2018-10-27 05:49:15,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15" (1/1) ... [2018-10-27 05:49:15,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15" (1/1) ... [2018-10-27 05:49:15,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 05:49:15,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 05:49:15,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 05:49:15,462 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 05:49:15,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 05:49:15,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 05:49:15,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 05:49:15,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 05:49:15,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 05:49:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 05:49:15,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 05:49:15,869 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 05:49:15,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:49:15 BoogieIcfgContainer [2018-10-27 05:49:15,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 05:49:15,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 05:49:15,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 05:49:15,873 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 05:49:15,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:49:15" (1/3) ... [2018-10-27 05:49:15,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ae493e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:49:15, skipping insertion in model container [2018-10-27 05:49:15,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:49:15" (2/3) ... [2018-10-27 05:49:15,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ae493e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:49:15, skipping insertion in model container [2018-10-27 05:49:15,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:49:15" (3/3) ... [2018-10-27 05:49:15,876 INFO L112 eAbstractionObserver]: Analyzing ICFG NonTermination4_false-no-overflow.c [2018-10-27 05:49:15,883 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 05:49:15,890 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-10-27 05:49:15,903 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-10-27 05:49:15,932 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 05:49:15,932 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 05:49:15,932 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 05:49:15,933 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 05:49:15,933 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 05:49:15,933 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 05:49:15,933 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 05:49:15,933 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 05:49:15,950 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-27 05:49:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-27 05:49:15,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:15,960 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:15,962 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:15,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:15,969 INFO L82 PathProgramCache]: Analyzing trace with hash 604672971, now seen corresponding path program 1 times [2018-10-27 05:49:15,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:16,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:16,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:16,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:16,021 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:16,134 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:49:16,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 05:49:16,135 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:49:16,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 05:49:16,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 05:49:16,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:49:16,153 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2018-10-27 05:49:16,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:16,313 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-27 05:49:16,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 05:49:16,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-10-27 05:49:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:16,325 INFO L225 Difference]: With dead ends: 30 [2018-10-27 05:49:16,325 INFO L226 Difference]: Without dead ends: 19 [2018-10-27 05:49:16,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:49:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-27 05:49:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-10-27 05:49:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-27 05:49:16,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-27 05:49:16,361 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2018-10-27 05:49:16,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:16,361 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-27 05:49:16,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 05:49:16,362 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-27 05:49:16,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-27 05:49:16,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:16,363 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:16,363 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:16,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:16,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1564992965, now seen corresponding path program 1 times [2018-10-27 05:49:16,363 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:16,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:16,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:16,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:16,365 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:16,417 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:49:16,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 05:49:16,417 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:49:16,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 05:49:16,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 05:49:16,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:49:16,419 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-10-27 05:49:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:16,447 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-27 05:49:16,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 05:49:16,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-27 05:49:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:16,448 INFO L225 Difference]: With dead ends: 18 [2018-10-27 05:49:16,449 INFO L226 Difference]: Without dead ends: 17 [2018-10-27 05:49:16,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:49:16,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-27 05:49:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-27 05:49:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-27 05:49:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-27 05:49:16,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 9 [2018-10-27 05:49:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:16,452 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-27 05:49:16,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 05:49:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-27 05:49:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-27 05:49:16,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:16,452 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:16,453 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:16,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1270141709, now seen corresponding path program 1 times [2018-10-27 05:49:16,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:16,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:16,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:16,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:16,455 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:16,478 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:49:16,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 05:49:16,478 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:49:16,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 05:49:16,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 05:49:16,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:49:16,479 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2018-10-27 05:49:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:16,516 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-27 05:49:16,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 05:49:16,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-10-27 05:49:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:16,519 INFO L225 Difference]: With dead ends: 21 [2018-10-27 05:49:16,519 INFO L226 Difference]: Without dead ends: 20 [2018-10-27 05:49:16,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:49:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-27 05:49:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-10-27 05:49:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-27 05:49:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-27 05:49:16,523 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2018-10-27 05:49:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:16,523 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-27 05:49:16,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 05:49:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-27 05:49:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-27 05:49:16,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:16,524 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:16,524 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:16,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:16,525 INFO L82 PathProgramCache]: Analyzing trace with hash 719687367, now seen corresponding path program 1 times [2018-10-27 05:49:16,525 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:16,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:16,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:16,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:16,526 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:16,567 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:49:16,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 05:49:16,567 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:49:16,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 05:49:16,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 05:49:16,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:49:16,568 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 3 states. [2018-10-27 05:49:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:16,580 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-27 05:49:16,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 05:49:16,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-27 05:49:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:16,581 INFO L225 Difference]: With dead ends: 19 [2018-10-27 05:49:16,581 INFO L226 Difference]: Without dead ends: 18 [2018-10-27 05:49:16,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:49:16,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-27 05:49:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-27 05:49:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-27 05:49:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-27 05:49:16,584 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2018-10-27 05:49:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:16,585 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-27 05:49:16,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 05:49:16,585 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-27 05:49:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-27 05:49:16,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:16,585 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:16,586 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:16,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:16,586 INFO L82 PathProgramCache]: Analyzing trace with hash -270353407, now seen corresponding path program 1 times [2018-10-27 05:49:16,586 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:16,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:16,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:16,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:16,588 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:16,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:16,645 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:16,646 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-10-27 05:49:16,647 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [14], [15], [16], [18], [20], [22], [28], [29], [30] [2018-10-27 05:49:16,692 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:49:16,692 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:49:16,896 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:49:16,897 INFO L272 AbstractInterpreter]: Visited 12 different actions 61 times. Merged at 7 different actions 43 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-10-27 05:49:16,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:16,912 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:49:16,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:16,913 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:49:16,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:16,924 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:49:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:16,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:16,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:17,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:17,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-10-27 05:49:17,092 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:17,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:49:17,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:49:17,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:49:17,093 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 4 states. [2018-10-27 05:49:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:17,184 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-27 05:49:17,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 05:49:17,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-10-27 05:49:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:17,185 INFO L225 Difference]: With dead ends: 24 [2018-10-27 05:49:17,185 INFO L226 Difference]: Without dead ends: 23 [2018-10-27 05:49:17,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:49:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-27 05:49:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-10-27 05:49:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-27 05:49:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-27 05:49:17,189 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 14 [2018-10-27 05:49:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:17,189 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-27 05:49:17,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:49:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-27 05:49:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-27 05:49:17,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:17,190 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:17,190 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:17,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:17,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2111584829, now seen corresponding path program 1 times [2018-10-27 05:49:17,191 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:17,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:17,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:17,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:17,195 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:17,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:17,345 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:17,345 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-27 05:49:17,345 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [14], [16], [18], [19], [20], [22], [28], [29], [30] [2018-10-27 05:49:17,346 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:49:17,346 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:49:17,452 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:49:17,454 INFO L272 AbstractInterpreter]: Visited 12 different actions 61 times. Merged at 7 different actions 47 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-10-27 05:49:17,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:17,464 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:49:17,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:17,464 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:49:17,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:17,471 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:49:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:17,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:17,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:17,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:17,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-10-27 05:49:17,730 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:17,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:49:17,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:49:17,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:49:17,731 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 4 states. [2018-10-27 05:49:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:17,763 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-27 05:49:17,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 05:49:17,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-10-27 05:49:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:17,765 INFO L225 Difference]: With dead ends: 26 [2018-10-27 05:49:17,765 INFO L226 Difference]: Without dead ends: 25 [2018-10-27 05:49:17,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:49:17,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-27 05:49:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-10-27 05:49:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-27 05:49:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-27 05:49:17,770 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 16 [2018-10-27 05:49:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:17,771 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-27 05:49:17,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:49:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-27 05:49:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-27 05:49:17,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:17,772 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:17,772 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:17,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:17,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1685232713, now seen corresponding path program 2 times [2018-10-27 05:49:17,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:17,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:17,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:17,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:17,774 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:17,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:17,880 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:17,880 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:17,880 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:17,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:17,880 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:49:17,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:49:17,888 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:49:17,911 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-27 05:49:17,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:17,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:17,975 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:18,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:18,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-10-27 05:49:18,100 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:18,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 05:49:18,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 05:49:18,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-27 05:49:18,101 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 5 states. [2018-10-27 05:49:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:18,188 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-27 05:49:18,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 05:49:18,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-27 05:49:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:18,190 INFO L225 Difference]: With dead ends: 30 [2018-10-27 05:49:18,191 INFO L226 Difference]: Without dead ends: 29 [2018-10-27 05:49:18,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-27 05:49:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-27 05:49:18,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-10-27 05:49:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-27 05:49:18,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-27 05:49:18,196 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 20 [2018-10-27 05:49:18,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:18,197 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-27 05:49:18,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 05:49:18,197 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-27 05:49:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-27 05:49:18,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:18,198 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:18,198 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:18,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:18,199 INFO L82 PathProgramCache]: Analyzing trace with hash -305965063, now seen corresponding path program 2 times [2018-10-27 05:49:18,199 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:18,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:18,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:18,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:18,200 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:18,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:18,281 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:18,281 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:18,281 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:18,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:18,281 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:18,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:49:18,289 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:49:18,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-27 05:49:18,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:18,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:18,323 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:18,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:18,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-10-27 05:49:18,406 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:18,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 05:49:18,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 05:49:18,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-27 05:49:18,407 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 5 states. [2018-10-27 05:49:18,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:18,431 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-27 05:49:18,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 05:49:18,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-10-27 05:49:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:18,432 INFO L225 Difference]: With dead ends: 32 [2018-10-27 05:49:18,433 INFO L226 Difference]: Without dead ends: 31 [2018-10-27 05:49:18,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-27 05:49:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-27 05:49:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-10-27 05:49:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-27 05:49:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-27 05:49:18,436 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 22 [2018-10-27 05:49:18,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:18,437 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-27 05:49:18,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 05:49:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-27 05:49:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-27 05:49:18,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:18,439 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:18,439 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:18,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash 739044077, now seen corresponding path program 3 times [2018-10-27 05:49:18,440 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:18,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:18,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:18,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:18,441 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:18,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:18,510 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:18,510 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:18,510 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:18,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:18,511 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:18,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:49:18,518 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:49:18,530 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:49:18,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:18,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:18,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:19,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:19,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-10-27 05:49:19,006 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:19,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:49:19,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:49:19,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:49:19,007 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 6 states. [2018-10-27 05:49:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:19,047 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-27 05:49:19,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 05:49:19,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-10-27 05:49:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:19,048 INFO L225 Difference]: With dead ends: 36 [2018-10-27 05:49:19,048 INFO L226 Difference]: Without dead ends: 35 [2018-10-27 05:49:19,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:49:19,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-27 05:49:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-10-27 05:49:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-27 05:49:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-27 05:49:19,053 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 26 [2018-10-27 05:49:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:19,053 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-27 05:49:19,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 05:49:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-27 05:49:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-27 05:49:19,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:19,054 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:19,054 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:19,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:19,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1551755695, now seen corresponding path program 3 times [2018-10-27 05:49:19,055 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:19,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:19,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:19,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:19,056 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:19,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:19,156 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:19,156 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:19,157 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:19,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:19,157 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:19,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:49:19,165 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:49:19,178 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:49:19,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:19,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:19,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:19,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:19,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-10-27 05:49:19,430 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:19,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:49:19,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:49:19,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:49:19,432 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 6 states. [2018-10-27 05:49:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:19,453 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-27 05:49:19,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 05:49:19,454 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-10-27 05:49:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:19,455 INFO L225 Difference]: With dead ends: 38 [2018-10-27 05:49:19,455 INFO L226 Difference]: Without dead ends: 37 [2018-10-27 05:49:19,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:49:19,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-27 05:49:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-10-27 05:49:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-27 05:49:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-27 05:49:19,458 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 28 [2018-10-27 05:49:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:19,458 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-27 05:49:19,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 05:49:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-27 05:49:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-27 05:49:19,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:19,459 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:19,463 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:19,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:19,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1290030685, now seen corresponding path program 4 times [2018-10-27 05:49:19,463 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:19,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:19,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:19,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:19,465 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:19,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:19,566 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:19,566 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:19,566 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:19,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:19,566 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:19,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:19,575 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:49:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:19,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:19,652 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:19,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:19,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-10-27 05:49:19,766 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:19,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 05:49:19,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 05:49:19,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-27 05:49:19,767 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 7 states. [2018-10-27 05:49:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:19,795 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-27 05:49:19,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 05:49:19,795 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2018-10-27 05:49:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:19,796 INFO L225 Difference]: With dead ends: 42 [2018-10-27 05:49:19,796 INFO L226 Difference]: Without dead ends: 41 [2018-10-27 05:49:19,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-27 05:49:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-27 05:49:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-10-27 05:49:19,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-27 05:49:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-27 05:49:19,800 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 32 [2018-10-27 05:49:19,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:19,801 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-27 05:49:19,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 05:49:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-27 05:49:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-27 05:49:19,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:19,802 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:19,802 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:19,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:19,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1526061797, now seen corresponding path program 4 times [2018-10-27 05:49:19,802 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:19,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:19,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:19,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:19,808 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:19,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:19,861 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:19,861 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:19,861 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:19,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:19,862 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:49:19,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:19,868 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:49:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:19,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:19,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:20,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:20,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-10-27 05:49:20,120 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:20,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 05:49:20,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 05:49:20,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-27 05:49:20,121 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 7 states. [2018-10-27 05:49:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:20,157 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-27 05:49:20,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 05:49:20,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2018-10-27 05:49:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:20,159 INFO L225 Difference]: With dead ends: 44 [2018-10-27 05:49:20,159 INFO L226 Difference]: Without dead ends: 43 [2018-10-27 05:49:20,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-27 05:49:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-27 05:49:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-10-27 05:49:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-27 05:49:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-27 05:49:20,164 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 34 [2018-10-27 05:49:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:20,164 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-27 05:49:20,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 05:49:20,164 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-27 05:49:20,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-27 05:49:20,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:20,165 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:20,166 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:20,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:20,166 INFO L82 PathProgramCache]: Analyzing trace with hash -450095143, now seen corresponding path program 5 times [2018-10-27 05:49:20,166 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:20,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:20,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:20,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:20,170 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:20,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:20,262 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:20,262 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:20,262 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:20,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:20,263 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:20,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:49:20,270 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:49:20,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-27 05:49:20,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:20,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:20,415 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:20,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:20,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-10-27 05:49:20,536 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:20,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 05:49:20,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 05:49:20,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-27 05:49:20,537 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 8 states. [2018-10-27 05:49:20,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:20,570 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-27 05:49:20,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 05:49:20,571 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2018-10-27 05:49:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:20,572 INFO L225 Difference]: With dead ends: 48 [2018-10-27 05:49:20,572 INFO L226 Difference]: Without dead ends: 47 [2018-10-27 05:49:20,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-27 05:49:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-27 05:49:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2018-10-27 05:49:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-27 05:49:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-27 05:49:20,576 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 38 [2018-10-27 05:49:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:20,576 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-27 05:49:20,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 05:49:20,576 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-27 05:49:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-27 05:49:20,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:20,577 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:20,577 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:20,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:20,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1250266011, now seen corresponding path program 5 times [2018-10-27 05:49:20,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:20,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:20,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:20,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:20,579 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:20,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:20,679 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:20,679 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:20,679 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:20,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:20,679 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:49:20,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:49:20,687 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:49:20,701 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-27 05:49:20,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:20,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:20,882 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:21,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:21,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-10-27 05:49:21,236 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:21,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 05:49:21,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 05:49:21,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-27 05:49:21,237 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 8 states. [2018-10-27 05:49:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:21,345 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-27 05:49:21,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 05:49:21,345 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-10-27 05:49:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:21,346 INFO L225 Difference]: With dead ends: 50 [2018-10-27 05:49:21,346 INFO L226 Difference]: Without dead ends: 49 [2018-10-27 05:49:21,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-27 05:49:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-27 05:49:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-10-27 05:49:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-27 05:49:21,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-27 05:49:21,351 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 40 [2018-10-27 05:49:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:21,351 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-27 05:49:21,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 05:49:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-27 05:49:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-27 05:49:21,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:21,352 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:21,352 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:21,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash 795377039, now seen corresponding path program 6 times [2018-10-27 05:49:21,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:21,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:21,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:21,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:21,354 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:21,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:21,452 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:21,452 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:21,452 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:21,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:21,452 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:21,459 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:49:21,459 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:49:21,467 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:49:21,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:21,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:21,542 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:21,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:21,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-10-27 05:49:21,633 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:21,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 05:49:21,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 05:49:21,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-27 05:49:21,633 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 9 states. [2018-10-27 05:49:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:21,664 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-27 05:49:21,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 05:49:21,665 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2018-10-27 05:49:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:21,666 INFO L225 Difference]: With dead ends: 54 [2018-10-27 05:49:21,666 INFO L226 Difference]: Without dead ends: 53 [2018-10-27 05:49:21,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-27 05:49:21,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-27 05:49:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2018-10-27 05:49:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-27 05:49:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-27 05:49:21,670 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 44 [2018-10-27 05:49:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:21,670 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-27 05:49:21,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 05:49:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-27 05:49:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-27 05:49:21,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:21,671 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:21,671 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:21,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:21,672 INFO L82 PathProgramCache]: Analyzing trace with hash -146842671, now seen corresponding path program 6 times [2018-10-27 05:49:21,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:21,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:21,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:21,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:21,673 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:21,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:21,903 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:21,903 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:21,903 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:21,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:21,903 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:21,912 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:49:21,912 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:49:21,921 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:49:21,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:21,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:21,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:22,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:22,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-10-27 05:49:22,316 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:22,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 05:49:22,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 05:49:22,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-27 05:49:22,316 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 9 states. [2018-10-27 05:49:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:22,335 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-27 05:49:22,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 05:49:22,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2018-10-27 05:49:22,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:22,337 INFO L225 Difference]: With dead ends: 56 [2018-10-27 05:49:22,337 INFO L226 Difference]: Without dead ends: 55 [2018-10-27 05:49:22,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-27 05:49:22,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-27 05:49:22,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-10-27 05:49:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-27 05:49:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-27 05:49:22,341 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 46 [2018-10-27 05:49:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:22,342 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-27 05:49:22,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 05:49:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-27 05:49:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-27 05:49:22,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:22,343 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:22,346 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:22,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:22,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1303593669, now seen corresponding path program 7 times [2018-10-27 05:49:22,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:22,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:22,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:22,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:22,348 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:22,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:22,469 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:22,469 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:22,469 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:22,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:22,469 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:22,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:22,479 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:49:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:22,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:22,563 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:22,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:22,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-10-27 05:49:22,729 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:22,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 05:49:22,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 05:49:22,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-27 05:49:22,730 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 10 states. [2018-10-27 05:49:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:22,766 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-27 05:49:22,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 05:49:22,767 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2018-10-27 05:49:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:22,767 INFO L225 Difference]: With dead ends: 60 [2018-10-27 05:49:22,767 INFO L226 Difference]: Without dead ends: 59 [2018-10-27 05:49:22,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-27 05:49:22,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-27 05:49:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2018-10-27 05:49:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-27 05:49:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-27 05:49:22,771 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 50 [2018-10-27 05:49:22,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:22,775 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-27 05:49:22,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 05:49:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-27 05:49:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-27 05:49:22,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:22,776 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:22,777 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:22,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:22,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1376932985, now seen corresponding path program 7 times [2018-10-27 05:49:22,777 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:22,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:22,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:22,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:22,781 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:22,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:22,865 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:22,865 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:22,865 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:22,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:22,866 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:22,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:22,873 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:49:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:22,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:23,113 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 155 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:26,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:26,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-10-27 05:49:26,156 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:26,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 05:49:26,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 05:49:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=152, Unknown=1, NotChecked=0, Total=306 [2018-10-27 05:49:26,157 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 10 states. [2018-10-27 05:49:26,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:26,197 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-27 05:49:26,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 05:49:26,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2018-10-27 05:49:26,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:26,198 INFO L225 Difference]: With dead ends: 62 [2018-10-27 05:49:26,198 INFO L226 Difference]: Without dead ends: 61 [2018-10-27 05:49:26,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=153, Invalid=152, Unknown=1, NotChecked=0, Total=306 [2018-10-27 05:49:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-27 05:49:26,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2018-10-27 05:49:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-27 05:49:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-27 05:49:26,203 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 52 [2018-10-27 05:49:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:26,203 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-27 05:49:26,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 05:49:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-27 05:49:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-27 05:49:26,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:26,204 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:26,204 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:26,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:26,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1621542779, now seen corresponding path program 8 times [2018-10-27 05:49:26,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:26,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:26,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:26,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:26,206 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:27,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:27,083 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:27,083 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:27,083 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:27,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:27,083 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:27,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:49:27,090 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:49:27,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-27 05:49:27,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:27,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:27,235 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:27,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:27,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-10-27 05:49:27,344 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:27,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-27 05:49:27,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-27 05:49:27,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-27 05:49:27,345 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 11 states. [2018-10-27 05:49:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:27,383 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-27 05:49:27,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 05:49:27,383 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-10-27 05:49:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:27,384 INFO L225 Difference]: With dead ends: 66 [2018-10-27 05:49:27,384 INFO L226 Difference]: Without dead ends: 65 [2018-10-27 05:49:27,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-27 05:49:27,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-27 05:49:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2018-10-27 05:49:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-27 05:49:27,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-27 05:49:27,391 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 56 [2018-10-27 05:49:27,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:27,391 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-27 05:49:27,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-27 05:49:27,392 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-27 05:49:27,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-27 05:49:27,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:27,392 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:27,393 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:27,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash -770516291, now seen corresponding path program 8 times [2018-10-27 05:49:27,393 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:27,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:27,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:27,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:27,394 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:27,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:27,511 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:27,512 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:27,512 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:27,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:27,512 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:27,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:49:27,527 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:49:27,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-27 05:49:27,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:27,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:27,616 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:34,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:34,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-10-27 05:49:34,139 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:34,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-27 05:49:34,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-27 05:49:34,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=190, Unknown=1, NotChecked=0, Total=380 [2018-10-27 05:49:34,140 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 11 states. [2018-10-27 05:49:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:34,189 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-27 05:49:34,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 05:49:34,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2018-10-27 05:49:34,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:34,190 INFO L225 Difference]: With dead ends: 68 [2018-10-27 05:49:34,190 INFO L226 Difference]: Without dead ends: 67 [2018-10-27 05:49:34,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=189, Invalid=190, Unknown=1, NotChecked=0, Total=380 [2018-10-27 05:49:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-27 05:49:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2018-10-27 05:49:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-27 05:49:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-27 05:49:34,194 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 58 [2018-10-27 05:49:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:34,194 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-27 05:49:34,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-27 05:49:34,195 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-27 05:49:34,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-27 05:49:34,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:34,200 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:34,200 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:34,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:34,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2087359567, now seen corresponding path program 9 times [2018-10-27 05:49:34,200 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:34,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:34,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:34,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:34,201 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:34,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:34,312 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:34,313 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:34,313 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:34,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:34,313 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:34,321 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:49:34,321 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:49:34,332 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:49:34,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:34,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:34,452 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:34,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:34,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-10-27 05:49:34,649 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:34,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 05:49:34,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 05:49:34,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-27 05:49:34,650 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 12 states. [2018-10-27 05:49:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:34,688 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-27 05:49:34,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 05:49:34,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2018-10-27 05:49:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:34,689 INFO L225 Difference]: With dead ends: 72 [2018-10-27 05:49:34,690 INFO L226 Difference]: Without dead ends: 71 [2018-10-27 05:49:34,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-27 05:49:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-27 05:49:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2018-10-27 05:49:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-27 05:49:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-27 05:49:34,693 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 62 [2018-10-27 05:49:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:34,693 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-27 05:49:34,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 05:49:34,694 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-27 05:49:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-27 05:49:34,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:34,694 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:34,695 INFO L424 AbstractCegarLoop]: === Iteration 22 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:34,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:34,695 INFO L82 PathProgramCache]: Analyzing trace with hash -202815117, now seen corresponding path program 9 times [2018-10-27 05:49:34,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:34,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:34,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:34,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:34,697 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:34,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:34,769 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:34,769 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:34,770 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:34,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:34,770 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:34,778 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:49:34,778 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:49:34,787 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:49:34,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:34,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:34,872 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 249 refuted. 12 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:42,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:42,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-10-27 05:49:42,829 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:42,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 05:49:42,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 05:49:42,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=229, Unknown=2, NotChecked=0, Total=462 [2018-10-27 05:49:42,830 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 12 states. [2018-10-27 05:49:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:42,872 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-27 05:49:42,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 05:49:42,877 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2018-10-27 05:49:42,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:42,877 INFO L225 Difference]: With dead ends: 74 [2018-10-27 05:49:42,877 INFO L226 Difference]: Without dead ends: 73 [2018-10-27 05:49:42,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 109 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=231, Invalid=229, Unknown=2, NotChecked=0, Total=462 [2018-10-27 05:49:42,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-27 05:49:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2018-10-27 05:49:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-27 05:49:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-27 05:49:42,881 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 64 [2018-10-27 05:49:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:42,881 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-27 05:49:42,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 05:49:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-27 05:49:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-27 05:49:42,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:42,882 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:42,882 INFO L424 AbstractCegarLoop]: === Iteration 23 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:42,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:42,882 INFO L82 PathProgramCache]: Analyzing trace with hash -494301337, now seen corresponding path program 10 times [2018-10-27 05:49:42,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:42,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:42,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:42,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:42,888 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:43,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:43,217 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:43,217 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:43,217 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:43,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:43,217 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:43,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:43,229 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:49:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:43,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:43,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:43,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:43,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-10-27 05:49:43,485 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:43,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 05:49:43,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 05:49:43,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-27 05:49:43,486 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 13 states. [2018-10-27 05:49:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:43,516 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-27 05:49:43,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 05:49:43,517 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2018-10-27 05:49:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:43,518 INFO L225 Difference]: With dead ends: 78 [2018-10-27 05:49:43,518 INFO L226 Difference]: Without dead ends: 77 [2018-10-27 05:49:43,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 115 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-27 05:49:43,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-27 05:49:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-10-27 05:49:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-27 05:49:43,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-27 05:49:43,521 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 68 [2018-10-27 05:49:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:43,521 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-27 05:49:43,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 05:49:43,521 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-27 05:49:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-27 05:49:43,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:43,522 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:43,522 INFO L424 AbstractCegarLoop]: === Iteration 24 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:43,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1717786537, now seen corresponding path program 10 times [2018-10-27 05:49:43,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:43,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:43,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:43,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:43,523 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:43,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:43,744 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:43,744 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:43,744 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:43,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:43,744 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:43,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:43,754 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:49:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:43,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:43,870 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 314 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:52,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:52,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-10-27 05:49:52,243 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:52,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 05:49:52,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 05:49:52,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=275, Unknown=3, NotChecked=0, Total=552 [2018-10-27 05:49:52,243 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 13 states. [2018-10-27 05:49:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:52,343 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-27 05:49:52,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 05:49:52,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2018-10-27 05:49:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:52,344 INFO L225 Difference]: With dead ends: 80 [2018-10-27 05:49:52,344 INFO L226 Difference]: Without dead ends: 79 [2018-10-27 05:49:52,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=274, Invalid=275, Unknown=3, NotChecked=0, Total=552 [2018-10-27 05:49:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-27 05:49:52,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2018-10-27 05:49:52,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-27 05:49:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-27 05:49:52,347 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 70 [2018-10-27 05:49:52,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:52,347 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-27 05:49:52,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 05:49:52,347 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-27 05:49:52,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-27 05:49:52,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:52,348 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:52,348 INFO L424 AbstractCegarLoop]: === Iteration 25 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:52,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:52,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1346736797, now seen corresponding path program 11 times [2018-10-27 05:49:52,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:52,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:52,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:52,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:52,349 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:52,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:52,483 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:52,483 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:52,483 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:52,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:52,484 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:52,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:49:52,492 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:49:52,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-27 05:49:52,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:52,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:52,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:52,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:52,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2018-10-27 05:49:52,757 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:52,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-27 05:49:52,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 05:49:52,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-27 05:49:52,758 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 14 states. [2018-10-27 05:49:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:52,804 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-27 05:49:52,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 05:49:52,805 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-10-27 05:49:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:52,806 INFO L225 Difference]: With dead ends: 84 [2018-10-27 05:49:52,806 INFO L226 Difference]: Without dead ends: 83 [2018-10-27 05:49:52,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 125 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-27 05:49:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-27 05:49:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-10-27 05:49:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-27 05:49:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-27 05:49:52,809 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 74 [2018-10-27 05:49:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:52,809 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-27 05:49:52,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-27 05:49:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-27 05:49:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-27 05:49:52,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:52,810 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:52,810 INFO L424 AbstractCegarLoop]: === Iteration 26 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:52,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:52,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1428907359, now seen corresponding path program 11 times [2018-10-27 05:49:52,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:52,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:52,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:52,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:52,813 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:52,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:52,900 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:52,900 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:52,900 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:52,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:52,901 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:52,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:49:52,909 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:49:52,972 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-27 05:49:52,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:52,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:53,073 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:54,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:54,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2018-10-27 05:49:54,048 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:54,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-27 05:49:54,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 05:49:54,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-27 05:49:54,049 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 14 states. [2018-10-27 05:49:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:54,094 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-27 05:49:54,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 05:49:54,098 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2018-10-27 05:49:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:54,099 INFO L225 Difference]: With dead ends: 86 [2018-10-27 05:49:54,099 INFO L226 Difference]: Without dead ends: 85 [2018-10-27 05:49:54,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 129 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-27 05:49:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-27 05:49:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2018-10-27 05:49:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-27 05:49:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-27 05:49:54,103 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 76 [2018-10-27 05:49:54,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:54,103 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-27 05:49:54,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-27 05:49:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-27 05:49:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-27 05:49:54,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:54,104 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:54,104 INFO L424 AbstractCegarLoop]: === Iteration 27 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:54,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:54,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1547949395, now seen corresponding path program 12 times [2018-10-27 05:49:54,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:54,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:54,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:54,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:54,106 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:54,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:54,358 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:54,358 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:54,358 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:54,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:54,358 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:54,367 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:49:54,367 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:49:54,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:49:54,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:54,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:54,829 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:55,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:55,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2018-10-27 05:49:55,034 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:55,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 05:49:55,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 05:49:55,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-27 05:49:55,035 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 15 states. [2018-10-27 05:49:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:55,079 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-27 05:49:55,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 05:49:55,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2018-10-27 05:49:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:55,081 INFO L225 Difference]: With dead ends: 90 [2018-10-27 05:49:55,081 INFO L226 Difference]: Without dead ends: 89 [2018-10-27 05:49:55,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-27 05:49:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-27 05:49:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2018-10-27 05:49:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-27 05:49:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-27 05:49:55,084 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 80 [2018-10-27 05:49:55,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:55,085 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-27 05:49:55,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 05:49:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-27 05:49:55,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-27 05:49:55,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:55,085 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:55,086 INFO L424 AbstractCegarLoop]: === Iteration 28 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:55,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1520685717, now seen corresponding path program 12 times [2018-10-27 05:49:55,086 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:55,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:55,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:55,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:55,089 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:55,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:55,308 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:55,309 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:55,309 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:55,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:55,309 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:55,318 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:49:55,318 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:49:55,332 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:49:55,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:55,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:55,466 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:57,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:57,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2018-10-27 05:49:57,345 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:57,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 05:49:57,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 05:49:57,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-27 05:49:57,346 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 15 states. [2018-10-27 05:49:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:57,418 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-27 05:49:57,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 05:49:57,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2018-10-27 05:49:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:57,420 INFO L225 Difference]: With dead ends: 92 [2018-10-27 05:49:57,420 INFO L226 Difference]: Without dead ends: 91 [2018-10-27 05:49:57,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-27 05:49:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-27 05:49:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2018-10-27 05:49:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-27 05:49:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-27 05:49:57,423 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 82 [2018-10-27 05:49:57,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:57,424 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-27 05:49:57,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 05:49:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-27 05:49:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-27 05:49:57,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:57,425 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:57,426 INFO L424 AbstractCegarLoop]: === Iteration 29 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:57,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:57,426 INFO L82 PathProgramCache]: Analyzing trace with hash -390678647, now seen corresponding path program 13 times [2018-10-27 05:49:57,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:57,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:57,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:57,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:57,427 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:57,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:57,911 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:57,911 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:57,911 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:57,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:57,911 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:57,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:57,921 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:49:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:57,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:58,140 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:58,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:58,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2018-10-27 05:49:58,662 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:58,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-27 05:49:58,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-27 05:49:58,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-27 05:49:58,662 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 16 states. [2018-10-27 05:49:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:58,710 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-27 05:49:58,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 05:49:58,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2018-10-27 05:49:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:58,712 INFO L225 Difference]: With dead ends: 96 [2018-10-27 05:49:58,712 INFO L226 Difference]: Without dead ends: 95 [2018-10-27 05:49:58,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 145 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-27 05:49:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-27 05:49:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2018-10-27 05:49:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-27 05:49:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-27 05:49:58,716 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 86 [2018-10-27 05:49:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:58,716 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-27 05:49:58,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-27 05:49:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-27 05:49:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-27 05:49:58,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:58,717 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:58,717 INFO L424 AbstractCegarLoop]: === Iteration 30 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:58,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1780023477, now seen corresponding path program 13 times [2018-10-27 05:49:58,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:58,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:58,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:58,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:58,718 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:58,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:58,882 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:58,882 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:58,882 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:58,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:58,882 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:49:58,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:58,891 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:49:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:58,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:59,032 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:49:59,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:59,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2018-10-27 05:49:59,564 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:59,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-27 05:49:59,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-27 05:49:59,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-27 05:49:59,565 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 16 states. [2018-10-27 05:49:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:59,618 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-27 05:49:59,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 05:49:59,619 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2018-10-27 05:49:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:59,619 INFO L225 Difference]: With dead ends: 98 [2018-10-27 05:49:59,620 INFO L226 Difference]: Without dead ends: 97 [2018-10-27 05:49:59,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 149 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-27 05:49:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-27 05:49:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2018-10-27 05:49:59,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-27 05:49:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-27 05:49:59,623 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 88 [2018-10-27 05:49:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:59,624 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-27 05:49:59,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-27 05:49:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-27 05:49:59,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-27 05:49:59,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:59,624 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:59,624 INFO L424 AbstractCegarLoop]: === Iteration 31 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:59,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:59,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1082693951, now seen corresponding path program 14 times [2018-10-27 05:49:59,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:59,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:59,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:49:59,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:59,625 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:00,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:00,210 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:50:00,210 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:50:00,210 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:50:00,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:00,210 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:50:00,230 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:50:00,230 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:50:00,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-27 05:50:00,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:50:00,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:50:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:00,448 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:50:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:00,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:50:00,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2018-10-27 05:50:00,687 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:50:00,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 05:50:00,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 05:50:00,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-27 05:50:00,687 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 17 states. [2018-10-27 05:50:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:50:00,756 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-27 05:50:00,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-27 05:50:00,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2018-10-27 05:50:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:50:00,758 INFO L225 Difference]: With dead ends: 102 [2018-10-27 05:50:00,758 INFO L226 Difference]: Without dead ends: 101 [2018-10-27 05:50:00,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 155 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-27 05:50:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-27 05:50:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2018-10-27 05:50:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-27 05:50:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-27 05:50:00,761 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 92 [2018-10-27 05:50:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:50:00,762 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-27 05:50:00,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 05:50:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-27 05:50:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-27 05:50:00,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:50:00,762 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-27 05:50:00,763 INFO L424 AbstractCegarLoop]: === Iteration 32 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:50:00,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:50:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1086802817, now seen corresponding path program 14 times [2018-10-27 05:50:00,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:50:00,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:00,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:50:00,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:00,764 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:50:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:01,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:01,049 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:50:01,049 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:50:01,049 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:50:01,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:01,049 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:50:01,058 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:50:01,058 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:50:01,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-27 05:50:01,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:50:01,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:50:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:01,225 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:50:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:01,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:50:01,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2018-10-27 05:50:01,912 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:50:01,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 05:50:01,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 05:50:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-27 05:50:01,913 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 17 states. [2018-10-27 05:50:01,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:50:01,946 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-27 05:50:01,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-27 05:50:01,947 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2018-10-27 05:50:01,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:50:01,947 INFO L225 Difference]: With dead ends: 104 [2018-10-27 05:50:01,948 INFO L226 Difference]: Without dead ends: 103 [2018-10-27 05:50:01,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 159 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-27 05:50:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-27 05:50:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2018-10-27 05:50:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-27 05:50:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-27 05:50:01,950 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 94 [2018-10-27 05:50:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:50:01,951 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-27 05:50:01,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 05:50:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-27 05:50:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-27 05:50:01,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:50:01,955 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-27 05:50:01,955 INFO L424 AbstractCegarLoop]: === Iteration 33 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:50:01,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:50:01,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1386489227, now seen corresponding path program 15 times [2018-10-27 05:50:01,955 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:50:01,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:01,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:50:01,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:01,956 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:50:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:02,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:02,151 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:50:02,151 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:50:02,151 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:50:02,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:02,151 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/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 [2018-10-27 05:50:02,162 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:50:02,162 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:50:02,178 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:50:02,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:50:02,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:50:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:02,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:50:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:02,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:50:02,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2018-10-27 05:50:02,646 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:50:02,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-27 05:50:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-27 05:50:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-27 05:50:02,646 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 18 states. [2018-10-27 05:50:02,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:50:02,706 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-27 05:50:02,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-27 05:50:02,707 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 98 [2018-10-27 05:50:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:50:02,708 INFO L225 Difference]: With dead ends: 108 [2018-10-27 05:50:02,708 INFO L226 Difference]: Without dead ends: 107 [2018-10-27 05:50:02,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 165 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-27 05:50:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-27 05:50:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-10-27 05:50:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-27 05:50:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-27 05:50:02,712 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 98 [2018-10-27 05:50:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:50:02,713 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-27 05:50:02,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-27 05:50:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-27 05:50:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-27 05:50:02,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:50:02,714 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-27 05:50:02,714 INFO L424 AbstractCegarLoop]: === Iteration 34 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:50:02,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:50:02,714 INFO L82 PathProgramCache]: Analyzing trace with hash -976283849, now seen corresponding path program 15 times [2018-10-27 05:50:02,714 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:50:02,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:02,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:50:02,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:02,715 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:50:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:03,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:03,359 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:50:03,359 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:50:03,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:50:03,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:03,359 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:50:03,367 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:50:03,367 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:50:03,395 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:50:03,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:50:03,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:50:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:03,563 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:50:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:04,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:50:04,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2018-10-27 05:50:04,531 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:50:04,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-27 05:50:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-27 05:50:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-27 05:50:04,532 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 18 states. [2018-10-27 05:50:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:50:04,569 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-27 05:50:04,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-27 05:50:04,570 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 100 [2018-10-27 05:50:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:50:04,571 INFO L225 Difference]: With dead ends: 110 [2018-10-27 05:50:04,571 INFO L226 Difference]: Without dead ends: 109 [2018-10-27 05:50:04,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 169 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-27 05:50:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-27 05:50:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2018-10-27 05:50:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-27 05:50:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-27 05:50:04,574 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 100 [2018-10-27 05:50:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:50:04,574 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-27 05:50:04,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-27 05:50:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-27 05:50:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-27 05:50:04,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:50:04,575 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-27 05:50:04,575 INFO L424 AbstractCegarLoop]: === Iteration 35 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:50:04,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:50:04,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1920279765, now seen corresponding path program 16 times [2018-10-27 05:50:04,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:50:04,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:04,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:50:04,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:04,580 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:50:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:04,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:04,790 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:50:04,790 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:50:04,791 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:50:04,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:04,791 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:50:04,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:50:04,799 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:50:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:04,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:50:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:05,006 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:50:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:05,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:50:05,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2018-10-27 05:50:05,288 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:50:05,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-27 05:50:05,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-27 05:50:05,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-27 05:50:05,289 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 19 states. [2018-10-27 05:50:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:50:05,345 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-27 05:50:05,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-27 05:50:05,346 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2018-10-27 05:50:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:50:05,347 INFO L225 Difference]: With dead ends: 114 [2018-10-27 05:50:05,347 INFO L226 Difference]: Without dead ends: 113 [2018-10-27 05:50:05,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-27 05:50:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-27 05:50:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2018-10-27 05:50:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-27 05:50:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-27 05:50:05,351 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 104 [2018-10-27 05:50:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:50:05,351 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-27 05:50:05,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-27 05:50:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-27 05:50:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-27 05:50:05,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:50:05,352 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-27 05:50:05,352 INFO L424 AbstractCegarLoop]: === Iteration 36 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:50:05,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:50:05,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1447084653, now seen corresponding path program 16 times [2018-10-27 05:50:05,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:50:05,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:05,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:50:05,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:05,354 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:50:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:05,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:05,539 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:50:05,539 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:50:05,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:50:05,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:05,539 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:50:05,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:50:05,547 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:50:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:05,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:50:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:05,760 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:50:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:06,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:50:06,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2018-10-27 05:50:06,245 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:50:06,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-27 05:50:06,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-27 05:50:06,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-27 05:50:06,246 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 19 states. [2018-10-27 05:50:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:50:06,332 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-10-27 05:50:06,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-27 05:50:06,333 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2018-10-27 05:50:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:50:06,334 INFO L225 Difference]: With dead ends: 116 [2018-10-27 05:50:06,334 INFO L226 Difference]: Without dead ends: 115 [2018-10-27 05:50:06,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 179 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-27 05:50:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-27 05:50:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2018-10-27 05:50:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-27 05:50:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-27 05:50:06,338 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 106 [2018-10-27 05:50:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:50:06,339 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-27 05:50:06,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-27 05:50:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-27 05:50:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-27 05:50:06,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:50:06,340 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-27 05:50:06,340 INFO L424 AbstractCegarLoop]: === Iteration 37 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:50:06,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:50:06,340 INFO L82 PathProgramCache]: Analyzing trace with hash -366478495, now seen corresponding path program 17 times [2018-10-27 05:50:06,340 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:50:06,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:06,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:50:06,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:06,341 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:50:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:06,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:06,599 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:50:06,599 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:50:06,599 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:50:06,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:06,599 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:50:06,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:50:06,608 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:50:06,629 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-27 05:50:06,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:50:06,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:50:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:06,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:50:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:07,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:50:07,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2018-10-27 05:50:07,096 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:50:07,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-27 05:50:07,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-27 05:50:07,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-27 05:50:07,097 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 20 states. [2018-10-27 05:50:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:50:07,146 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-10-27 05:50:07,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-27 05:50:07,147 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2018-10-27 05:50:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:50:07,148 INFO L225 Difference]: With dead ends: 120 [2018-10-27 05:50:07,148 INFO L226 Difference]: Without dead ends: 119 [2018-10-27 05:50:07,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 185 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-27 05:50:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-27 05:50:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2018-10-27 05:50:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-27 05:50:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-27 05:50:07,152 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 110 [2018-10-27 05:50:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:50:07,152 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-27 05:50:07,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-27 05:50:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-27 05:50:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-27 05:50:07,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:50:07,153 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-27 05:50:07,153 INFO L424 AbstractCegarLoop]: === Iteration 38 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:50:07,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:50:07,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1486115, now seen corresponding path program 17 times [2018-10-27 05:50:07,153 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:50:07,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:07,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:50:07,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:07,154 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:50:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:07,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:07,360 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:50:07,360 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:50:07,360 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:50:07,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:07,360 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:50:07,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:50:07,369 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:50:07,389 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-27 05:50:07,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:50:07,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:50:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:07,675 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:50:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:08,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:50:08,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2018-10-27 05:50:08,698 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:50:08,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-27 05:50:08,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-27 05:50:08,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-27 05:50:08,699 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 20 states. [2018-10-27 05:50:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:50:08,772 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-27 05:50:08,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-27 05:50:08,773 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 112 [2018-10-27 05:50:08,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:50:08,774 INFO L225 Difference]: With dead ends: 122 [2018-10-27 05:50:08,774 INFO L226 Difference]: Without dead ends: 121 [2018-10-27 05:50:08,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 189 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-27 05:50:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-27 05:50:08,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2018-10-27 05:50:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-27 05:50:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-27 05:50:08,779 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 112 [2018-10-27 05:50:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:50:08,779 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-27 05:50:08,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-27 05:50:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-27 05:50:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-27 05:50:08,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:50:08,780 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-27 05:50:08,780 INFO L424 AbstractCegarLoop]: === Iteration 39 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:50:08,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:50:08,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1929536745, now seen corresponding path program 18 times [2018-10-27 05:50:08,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:50:08,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:08,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:50:08,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:08,782 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:50:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:09,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:09,021 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:50:09,021 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:50:09,021 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:50:09,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:09,021 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:50:09,030 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:50:09,030 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:50:09,045 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:50:09,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:50:09,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:50:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:09,271 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:50:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:09,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:50:09,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2018-10-27 05:50:09,545 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:50:09,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-27 05:50:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-27 05:50:09,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-27 05:50:09,546 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 21 states. [2018-10-27 05:50:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:50:09,598 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-10-27 05:50:09,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-27 05:50:09,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2018-10-27 05:50:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:50:09,599 INFO L225 Difference]: With dead ends: 126 [2018-10-27 05:50:09,599 INFO L226 Difference]: Without dead ends: 125 [2018-10-27 05:50:09,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 195 SyntacticMatches, 18 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-27 05:50:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-27 05:50:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2018-10-27 05:50:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-27 05:50:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-27 05:50:09,603 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 116 [2018-10-27 05:50:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:50:09,603 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-27 05:50:09,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-27 05:50:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-27 05:50:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-27 05:50:09,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:50:09,604 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-27 05:50:09,604 INFO L424 AbstractCegarLoop]: === Iteration 40 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:50:09,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:50:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1141061465, now seen corresponding path program 18 times [2018-10-27 05:50:09,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:50:09,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:09,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:50:09,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:09,605 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:50:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:09,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:09,869 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:50:09,869 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:50:09,870 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:50:09,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:09,870 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:50:09,880 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:50:09,880 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:50:09,897 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:50:09,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:50:09,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:50:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:10,116 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:50:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:10,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:50:10,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 38 [2018-10-27 05:50:10,701 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:50:10,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-27 05:50:10,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-27 05:50:10,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-27 05:50:10,702 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 21 states. [2018-10-27 05:50:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:50:10,759 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-10-27 05:50:10,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-27 05:50:10,760 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 118 [2018-10-27 05:50:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:50:10,761 INFO L225 Difference]: With dead ends: 128 [2018-10-27 05:50:10,761 INFO L226 Difference]: Without dead ends: 127 [2018-10-27 05:50:10,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 199 SyntacticMatches, 19 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-27 05:50:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-27 05:50:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2018-10-27 05:50:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-27 05:50:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-27 05:50:10,765 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 118 [2018-10-27 05:50:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:50:10,765 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-27 05:50:10,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-27 05:50:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-27 05:50:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-27 05:50:10,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:50:10,766 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-27 05:50:10,766 INFO L424 AbstractCegarLoop]: === Iteration 41 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:50:10,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:50:10,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1769072051, now seen corresponding path program 19 times [2018-10-27 05:50:10,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:50:10,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:10,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:50:10,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:10,775 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:50:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:11,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:11,845 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:50:11,845 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:50:11,846 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:50:11,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:50:11,846 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:50:11,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:50:11,856 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:50:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:50:11,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:50:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:12,124 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:50:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:50:12,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:50:12,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2018-10-27 05:50:12,588 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:50:12,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-27 05:50:12,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-27 05:50:12,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-27 05:50:12,589 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 22 states. [2018-10-27 05:50:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:50:12,649 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-10-27 05:50:12,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-27 05:50:12,650 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 122 [2018-10-27 05:50:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:50:12,651 INFO L225 Difference]: With dead ends: 132 [2018-10-27 05:50:12,651 INFO L226 Difference]: Without dead ends: 131 [2018-10-27 05:50:12,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 205 SyntacticMatches, 19 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-27 05:50:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-27 05:50:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2018-10-27 05:50:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-27 05:50:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-27 05:50:12,655 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 122 [2018-10-27 05:50:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:50:12,655 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-27 05:50:12,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-27 05:50:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-27 05:50:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-27 05:50:12,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:50:12,660 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-27 05:50:12,660 INFO L424 AbstractCegarLoop]: === Iteration 42 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:50:12,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:50:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash 728809743, now seen corresponding path program 19 times [2018-10-27 05:50:12,661 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:50:12,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:12,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:50:12,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:50:12,662 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:50:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 05:50:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 05:50:12,706 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-27 05:50:12,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 05:50:12 BoogieIcfgContainer [2018-10-27 05:50:12,754 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 05:50:12,755 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 05:50:12,755 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 05:50:12,755 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 05:50:12,757 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:49:15" (3/4) ... [2018-10-27 05:50:12,759 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-27 05:50:12,823 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f22fb2dd-72a7-427f-b692-930703479c9f/bin-2019/utaipan/witness.graphml [2018-10-27 05:50:12,823 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 05:50:12,824 INFO L168 Benchmark]: Toolchain (without parser) took 57572.98 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 432.0 MB). Free memory was 954.4 MB in the beginning and 1.4 GB in the end (delta: -417.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-10-27 05:50:12,825 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 05:50:12,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.54 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-27 05:50:12,825 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.81 ms. Allocated memory is still 1.0 GB. Free memory is still 943.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 05:50:12,826 INFO L168 Benchmark]: Boogie Preprocessor took 15.25 ms. Allocated memory is still 1.0 GB. Free memory is still 943.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 05:50:12,826 INFO L168 Benchmark]: RCFGBuilder took 407.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 943.7 MB in the beginning and 1.1 GB in the end (delta: -176.2 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2018-10-27 05:50:12,826 INFO L168 Benchmark]: TraceAbstraction took 56884.73 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 293.6 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -252.1 MB). Peak memory consumption was 41.5 MB. Max. memory is 11.5 GB. [2018-10-27 05:50:12,829 INFO L168 Benchmark]: Witness Printer took 68.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 05:50:12,831 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 176.54 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.81 ms. Allocated memory is still 1.0 GB. Free memory is still 943.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.25 ms. Allocated memory is still 1.0 GB. Free memory is still 943.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 407.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 943.7 MB in the beginning and 1.1 GB in the end (delta: -176.2 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 56884.73 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 293.6 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -252.1 MB). Peak memory consumption was 41.5 MB. Max. memory is 11.5 GB. * Witness Printer took 68.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int x, y; [L16] x = 1 [L17] y = 1 VAL [x=1, y=1] [L18] COND TRUE x >= 0 VAL [x=1, y=1] [L19] EXPR 2*x [L19] x = 2*x VAL [x=2, y=1] [L20] EXPR 3*y [L20] y = 3*y VAL [x=2, y=3] [L18] COND TRUE x >= 0 VAL [x=2, y=3] [L19] EXPR 2*x [L19] x = 2*x VAL [x=4, y=3] [L20] EXPR 3*y [L20] y = 3*y VAL [x=4, y=9] [L18] COND TRUE x >= 0 VAL [x=4, y=9] [L19] EXPR 2*x [L19] x = 2*x VAL [x=8, y=9] [L20] EXPR 3*y [L20] y = 3*y VAL [x=8, y=27] [L18] COND TRUE x >= 0 VAL [x=8, y=27] [L19] EXPR 2*x [L19] x = 2*x VAL [x=16, y=27] [L20] EXPR 3*y [L20] y = 3*y VAL [x=16, y=81] [L18] COND TRUE x >= 0 VAL [x=16, y=81] [L19] EXPR 2*x [L19] x = 2*x VAL [x=32, y=81] [L20] EXPR 3*y [L20] y = 3*y VAL [x=32, y=243] [L18] COND TRUE x >= 0 VAL [x=32, y=243] [L19] EXPR 2*x [L19] x = 2*x VAL [x=64, y=243] [L20] EXPR 3*y [L20] y = 3*y VAL [x=64, y=729] [L18] COND TRUE x >= 0 VAL [x=64, y=729] [L19] EXPR 2*x [L19] x = 2*x VAL [x=128, y=729] [L20] EXPR 3*y [L20] y = 3*y VAL [x=128, y=2187] [L18] COND TRUE x >= 0 VAL [x=128, y=2187] [L19] EXPR 2*x [L19] x = 2*x VAL [x=256, y=2187] [L20] EXPR 3*y [L20] y = 3*y VAL [x=256, y=6561] [L18] COND TRUE x >= 0 VAL [x=256, y=6561] [L19] EXPR 2*x [L19] x = 2*x VAL [x=512, y=6561] [L20] EXPR 3*y [L20] y = 3*y VAL [x=512, y=19683] [L18] COND TRUE x >= 0 VAL [x=512, y=19683] [L19] EXPR 2*x [L19] x = 2*x VAL [x=1024, y=19683] [L20] EXPR 3*y [L20] y = 3*y VAL [x=1024, y=59049] [L18] COND TRUE x >= 0 VAL [x=1024, y=59049] [L19] EXPR 2*x [L19] x = 2*x VAL [x=2048, y=59049] [L20] EXPR 3*y [L20] y = 3*y VAL [x=2048, y=177147] [L18] COND TRUE x >= 0 VAL [x=2048, y=177147] [L19] EXPR 2*x [L19] x = 2*x VAL [x=4096, y=177147] [L20] EXPR 3*y [L20] y = 3*y VAL [x=4096, y=531441] [L18] COND TRUE x >= 0 VAL [x=4096, y=531441] [L19] EXPR 2*x [L19] x = 2*x VAL [x=8192, y=531441] [L20] EXPR 3*y [L20] y = 3*y VAL [x=8192, y=1594323] [L18] COND TRUE x >= 0 VAL [x=8192, y=1594323] [L19] EXPR 2*x [L19] x = 2*x VAL [x=16384, y=1594323] [L20] EXPR 3*y [L20] y = 3*y VAL [x=16384, y=4782969] [L18] COND TRUE x >= 0 VAL [x=16384, y=4782969] [L19] EXPR 2*x [L19] x = 2*x VAL [x=32768, y=4782969] [L20] EXPR 3*y [L20] y = 3*y VAL [x=32768, y=14348907] [L18] COND TRUE x >= 0 VAL [x=32768, y=14348907] [L19] EXPR 2*x [L19] x = 2*x VAL [x=65536, y=14348907] [L20] EXPR 3*y [L20] y = 3*y VAL [x=65536, y=43046721] [L18] COND TRUE x >= 0 VAL [x=65536, y=43046721] [L19] EXPR 2*x [L19] x = 2*x VAL [x=131072, y=43046721] [L20] EXPR 3*y [L20] y = 3*y VAL [x=131072, y=129140163] [L18] COND TRUE x >= 0 VAL [x=131072, y=129140163] [L19] EXPR 2*x [L19] x = 2*x VAL [x=262144, y=129140163] [L20] EXPR 3*y [L20] y = 3*y VAL [x=262144, y=387420489] [L18] COND TRUE x >= 0 VAL [x=262144, y=387420489] [L19] EXPR 2*x [L19] x = 2*x VAL [x=524288, y=387420489] [L20] EXPR 3*y [L20] y = 3*y VAL [x=524288, y=1162261467] [L18] COND TRUE x >= 0 VAL [x=524288, y=1162261467] [L19] EXPR 2*x [L19] x = 2*x VAL [x=1048576, y=1162261467] [L20] 3*y VAL [x=1048576, y=1162261467] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 4 error locations. UNSAFE Result, 56.8s OverallTime, 42 OverallIterations, 20 TraceHistogramMax, 2.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 434 SDtfs, 412 SDslu, 3061 SDs, 0 SdLazy, 1450 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5402 GetRequests, 4241 SyntacticMatches, 362 SemanticMatches, 799 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5725 ImplicationChecksByTransitivity, 48.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 41 MinimizatonAttempts, 39 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 51.4s InterpolantComputationTime, 5158 NumberOfCodeBlocks, 5158 NumberOfCodeBlocksAsserted, 205 NumberOfCheckSat, 7417 ConstructedInterpolants, 1020 QuantifiedInterpolants, 5373757 SizeOfPredicates, 0 NumberOfNonLiveVariables, 4311 ConjunctsInSsa, 435 ConjunctsInUnsatCore, 115 InterpolantComputations, 4 PerfectInterpolantSequences, 0/42237 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...