./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block SingleStatement --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a881e1073186594f4727f809fbe5d917ff145543 --rcfgbuilder.size.of.a.code.block SingleStatement .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 09:55:26,745 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 09:55:26,747 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 09:55:26,760 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 09:55:26,760 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 09:55:26,761 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 09:55:26,763 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 09:55:26,765 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 09:55:26,766 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 09:55:26,767 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 09:55:26,768 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 09:55:26,769 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 09:55:26,770 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 09:55:26,771 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 09:55:26,772 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 09:55:26,773 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 09:55:26,774 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 09:55:26,776 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 09:55:26,778 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 09:55:26,780 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 09:55:26,781 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 09:55:26,782 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 09:55:26,785 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 09:55:26,786 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 09:55:26,786 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 09:55:26,787 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 09:55:26,788 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 09:55:26,789 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 09:55:26,790 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 09:55:26,791 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 09:55:26,791 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 09:55:26,792 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 09:55:26,792 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 09:55:26,792 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 09:55:26,794 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 09:55:26,795 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 09:55:26,795 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 09:55:26,814 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 09:55:26,815 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 09:55:26,815 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 09:55:26,815 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 09:55:26,816 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 09:55:26,816 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 09:55:26,816 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 09:55:26,816 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 09:55:26,816 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 09:55:26,816 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 09:55:26,817 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 09:55:26,819 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 09:55:26,820 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 09:55:26,820 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 09:55:26,820 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 09:55:26,821 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 09:55:26,821 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 09:55:26,821 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 09:55:26,821 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 09:55:26,821 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 09:55:26,821 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 09:55:26,823 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 09:55:26,824 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 09:55:26,824 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 09:55:26,824 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 09:55:26,824 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 09:55:26,825 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:55:26,825 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 09:55:26,825 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 09:55:26,825 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 09:55:26,826 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 09:55:26,826 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 09:55:26,826 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 09:55:26,826 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 09:55:26,826 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 -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux 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 ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a881e1073186594f4727f809fbe5d917ff145543 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement [2018-10-22 09:55:26,880 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 09:55:26,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 09:55:26,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 09:55:26,900 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 09:55:26,900 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 09:55:26,901 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-22 09:55:26,966 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5d3d931c9/cdc6d8b866c64245abec508612b3708b/FLAGcd10fecc3 [2018-10-22 09:55:27,369 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 09:55:27,370 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-22 09:55:27,375 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5d3d931c9/cdc6d8b866c64245abec508612b3708b/FLAGcd10fecc3 [2018-10-22 09:55:27,390 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5d3d931c9/cdc6d8b866c64245abec508612b3708b [2018-10-22 09:55:27,396 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 09:55:27,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 09:55:27,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 09:55:27,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 09:55:27,403 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 09:55:27,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:55:27" (1/1) ... [2018-10-22 09:55:27,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39751e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27, skipping insertion in model container [2018-10-22 09:55:27,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:55:27" (1/1) ... [2018-10-22 09:55:27,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 09:55:27,450 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 09:55:27,669 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:55:27,673 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 09:55:27,692 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:55:27,709 INFO L193 MainTranslator]: Completed translation [2018-10-22 09:55:27,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27 WrapperNode [2018-10-22 09:55:27,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 09:55:27,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 09:55:27,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 09:55:27,711 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 09:55:27,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27" (1/1) ... [2018-10-22 09:55:27,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27" (1/1) ... [2018-10-22 09:55:27,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 09:55:27,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 09:55:27,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 09:55:27,736 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 09:55:27,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27" (1/1) ... [2018-10-22 09:55:27,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27" (1/1) ... [2018-10-22 09:55:27,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27" (1/1) ... [2018-10-22 09:55:27,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27" (1/1) ... [2018-10-22 09:55:27,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27" (1/1) ... [2018-10-22 09:55:27,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27" (1/1) ... [2018-10-22 09:55:27,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27" (1/1) ... [2018-10-22 09:55:27,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 09:55:27,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 09:55:27,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 09:55:27,762 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 09:55:27,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:27,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 09:55:27,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 09:55:27,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 09:55:27,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 09:55:27,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 09:55:27,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 09:55:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 09:55:27,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 09:55:28,376 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 09:55:28,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:55:28 BoogieIcfgContainer [2018-10-22 09:55:28,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 09:55:28,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 09:55:28,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 09:55:28,386 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 09:55:28,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:55:27" (1/3) ... [2018-10-22 09:55:28,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a7e11d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:55:28, skipping insertion in model container [2018-10-22 09:55:28,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:27" (2/3) ... [2018-10-22 09:55:28,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a7e11d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:55:28, skipping insertion in model container [2018-10-22 09:55:28,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:55:28" (3/3) ... [2018-10-22 09:55:28,389 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call_true-termination.i [2018-10-22 09:55:28,400 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 09:55:28,412 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 09:55:28,430 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 09:55:28,474 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 09:55:28,475 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 09:55:28,475 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 09:55:28,475 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 09:55:28,475 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 09:55:28,475 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 09:55:28,476 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 09:55:28,476 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 09:55:28,476 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 09:55:28,496 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-10-22 09:55:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 09:55:28,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:28,504 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:28,507 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:28,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:28,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1279405655, now seen corresponding path program 1 times [2018-10-22 09:55:28,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:28,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:28,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:28,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:28,559 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:28,640 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:55:28,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 09:55:28,640 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:55:28,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 09:55:28,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 09:55:28,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:55:28,663 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2018-10-22 09:55:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:28,687 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2018-10-22 09:55:28,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 09:55:28,689 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-10-22 09:55:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:28,697 INFO L225 Difference]: With dead ends: 70 [2018-10-22 09:55:28,698 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 09:55:28,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:55:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 09:55:28,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-22 09:55:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 09:55:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-22 09:55:28,745 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 21 [2018-10-22 09:55:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:28,745 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-22 09:55:28,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 09:55:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-22 09:55:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 09:55:28,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:28,748 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:28,748 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:28,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:28,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1908705671, now seen corresponding path program 1 times [2018-10-22 09:55:28,749 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:28,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:28,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:28,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:28,752 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:28,938 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:55:28,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 09:55:28,939 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:55:28,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 09:55:28,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 09:55:28,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 09:55:28,945 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 4 states. [2018-10-22 09:55:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:29,143 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-10-22 09:55:29,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 09:55:29,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-10-22 09:55:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:29,145 INFO L225 Difference]: With dead ends: 53 [2018-10-22 09:55:29,145 INFO L226 Difference]: Without dead ends: 48 [2018-10-22 09:55:29,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 09:55:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-22 09:55:29,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2018-10-22 09:55:29,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-22 09:55:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-22 09:55:29,155 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 22 [2018-10-22 09:55:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:29,155 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-22 09:55:29,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 09:55:29,156 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-22 09:55:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-22 09:55:29,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:29,157 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:29,157 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:29,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:29,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1120909456, now seen corresponding path program 1 times [2018-10-22 09:55:29,158 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:29,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:29,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:29,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:29,159 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:29,256 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:55:29,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 09:55:29,257 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:55:29,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 09:55:29,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 09:55:29,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 09:55:29,258 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 4 states. [2018-10-22 09:55:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:29,407 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2018-10-22 09:55:29,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 09:55:29,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-10-22 09:55:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:29,409 INFO L225 Difference]: With dead ends: 63 [2018-10-22 09:55:29,409 INFO L226 Difference]: Without dead ends: 44 [2018-10-22 09:55:29,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 09:55:29,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-22 09:55:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2018-10-22 09:55:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-22 09:55:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-22 09:55:29,422 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 30 [2018-10-22 09:55:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:29,426 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-22 09:55:29,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 09:55:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-22 09:55:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-22 09:55:29,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:29,427 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:29,428 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:29,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:29,429 INFO L82 PathProgramCache]: Analyzing trace with hash 855816455, now seen corresponding path program 1 times [2018-10-22 09:55:29,429 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:29,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:29,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:29,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:29,430 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:29,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:29,609 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:29,610 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-10-22 09:55:29,612 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [6], [7], [8], [9], [10], [11], [12], [17], [22], [23], [27], [30], [32], [33], [37], [40], [42], [43], [44], [45], [47], [48], [49], [53], [54], [55], [62], [65], [67], [73], [74], [75], [77] [2018-10-22 09:55:29,675 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:55:29,675 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:55:31,185 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 09:55:31,187 INFO L272 AbstractInterpreter]: Visited 36 different actions 1253 times. Merged at 16 different actions 977 times. Widened at 3 different actions 115 times. Found 71 fixpoints after 5 different actions. Largest state had 10 variables. [2018-10-22 09:55:31,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:31,211 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 09:55:31,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:31,211 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:31,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:31,222 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:31,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:31,409 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:31,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:31,632 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:31,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:31,650 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:31,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:31,705 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:31,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:31,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 13 [2018-10-22 09:55:31,759 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:31,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 09:55:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 09:55:31,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-10-22 09:55:31,760 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 9 states. [2018-10-22 09:55:31,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:31,951 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2018-10-22 09:55:31,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 09:55:31,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2018-10-22 09:55:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:31,957 INFO L225 Difference]: With dead ends: 73 [2018-10-22 09:55:31,957 INFO L226 Difference]: Without dead ends: 52 [2018-10-22 09:55:31,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2018-10-22 09:55:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-22 09:55:31,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2018-10-22 09:55:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 09:55:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-22 09:55:31,967 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 38 [2018-10-22 09:55:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:31,968 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-22 09:55:31,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 09:55:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-22 09:55:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 09:55:31,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:31,971 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:31,971 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:31,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:31,971 INFO L82 PathProgramCache]: Analyzing trace with hash 738546302, now seen corresponding path program 2 times [2018-10-22 09:55:31,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:31,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:31,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:31,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:31,974 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 09:55:32,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:32,068 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:32,068 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:55:32,069 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:55:32,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:32,069 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:32,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:55:32,087 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:55:32,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:55:32,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:32,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 09:55:32,269 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 09:55:32,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:32,661 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:32,678 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:55:32,678 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:55:32,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:55:32,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:32,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 09:55:32,719 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 09:55:32,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:32,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 13 [2018-10-22 09:55:32,742 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:32,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 09:55:32,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 09:55:32,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-10-22 09:55:32,744 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 9 states. [2018-10-22 09:55:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:32,858 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2018-10-22 09:55:32,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 09:55:32,860 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2018-10-22 09:55:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:32,861 INFO L225 Difference]: With dead ends: 97 [2018-10-22 09:55:32,861 INFO L226 Difference]: Without dead ends: 92 [2018-10-22 09:55:32,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2018-10-22 09:55:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-22 09:55:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2018-10-22 09:55:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 09:55:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-10-22 09:55:32,871 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 46 [2018-10-22 09:55:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:32,872 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-10-22 09:55:32,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 09:55:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-10-22 09:55:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-22 09:55:32,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:32,874 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:32,875 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:32,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:32,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1441574787, now seen corresponding path program 3 times [2018-10-22 09:55:32,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:32,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:32,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:55:32,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:32,876 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 47 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-10-22 09:55:33,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:33,127 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:33,127 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:55:33,127 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:55:33,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:33,128 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:33,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:55:33,137 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:55:33,200 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 09:55:33,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:33,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 09:55:33,387 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 09:55:33,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:33,584 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:33,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:55:33,612 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:55:33,642 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 09:55:33,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:33,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 09:55:33,666 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-22 09:55:33,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:33,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 20 [2018-10-22 09:55:33,697 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:33,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 09:55:33,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 09:55:33,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2018-10-22 09:55:33,699 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 14 states. [2018-10-22 09:55:34,788 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-22 09:55:35,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:35,060 INFO L93 Difference]: Finished difference Result 202 states and 212 transitions. [2018-10-22 09:55:35,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 09:55:35,061 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2018-10-22 09:55:35,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:35,063 INFO L225 Difference]: With dead ends: 202 [2018-10-22 09:55:35,064 INFO L226 Difference]: Without dead ends: 168 [2018-10-22 09:55:35,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=793, Invalid=2287, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 09:55:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-22 09:55:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2018-10-22 09:55:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-22 09:55:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2018-10-22 09:55:35,081 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 70 [2018-10-22 09:55:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:35,081 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2018-10-22 09:55:35,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 09:55:35,081 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2018-10-22 09:55:35,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-22 09:55:35,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:35,085 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 9, 9, 9, 9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:35,085 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:35,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:35,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1591094803, now seen corresponding path program 4 times [2018-10-22 09:55:35,086 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:35,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:35,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:55:35,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:35,087 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 180 proven. 30 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-10-22 09:55:35,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:35,335 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:35,335 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:55:35,335 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:55:35,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:35,336 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:35,351 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:55:35,352 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:55:35,406 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:55:35,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:35,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 180 proven. 30 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-10-22 09:55:35,674 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 180 proven. 30 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-10-22 09:55:35,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:35,953 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:35,970 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:55:35,970 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:55:36,028 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:55:36,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:36,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 180 proven. 30 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-10-22 09:55:36,053 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 180 proven. 30 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-10-22 09:55:36,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:36,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 25 [2018-10-22 09:55:36,086 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:36,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 09:55:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 09:55:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2018-10-22 09:55:36,088 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 17 states. [2018-10-22 09:55:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:36,389 INFO L93 Difference]: Finished difference Result 232 states and 240 transitions. [2018-10-22 09:55:36,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 09:55:36,392 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 118 [2018-10-22 09:55:36,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:36,395 INFO L225 Difference]: With dead ends: 232 [2018-10-22 09:55:36,397 INFO L226 Difference]: Without dead ends: 158 [2018-10-22 09:55:36,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2018-10-22 09:55:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-22 09:55:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 143. [2018-10-22 09:55:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-22 09:55:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2018-10-22 09:55:36,426 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 118 [2018-10-22 09:55:36,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:36,426 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2018-10-22 09:55:36,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 09:55:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2018-10-22 09:55:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-22 09:55:36,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:36,430 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 12, 12, 12, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:36,431 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:36,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:36,431 INFO L82 PathProgramCache]: Analyzing trace with hash -694716590, now seen corresponding path program 5 times [2018-10-22 09:55:36,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:36,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:36,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:55:36,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:36,433 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2018-10-22 09:55:36,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:36,653 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:36,653 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:55:36,654 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:55:36,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:36,655 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:36,666 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:55:36,666 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:55:36,804 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-22 09:55:36,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:36,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 300 proven. 56 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-10-22 09:55:37,151 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 300 proven. 56 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-10-22 09:55:37,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:37,430 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:37,448 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:55:37,448 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:55:37,556 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-22 09:55:37,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:37,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 300 proven. 56 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-10-22 09:55:37,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 300 proven. 56 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-10-22 09:55:37,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:37,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12, 12, 12] total 30 [2018-10-22 09:55:37,634 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:37,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 09:55:37,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 09:55:37,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2018-10-22 09:55:37,635 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand 20 states. [2018-10-22 09:55:40,145 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-22 09:55:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:40,154 INFO L93 Difference]: Finished difference Result 375 states and 388 transitions. [2018-10-22 09:55:40,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-22 09:55:40,155 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 142 [2018-10-22 09:55:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:40,158 INFO L225 Difference]: With dead ends: 375 [2018-10-22 09:55:40,158 INFO L226 Difference]: Without dead ends: 285 [2018-10-22 09:55:40,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3413 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2786, Invalid=8344, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 09:55:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-22 09:55:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 215. [2018-10-22 09:55:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-22 09:55:40,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 219 transitions. [2018-10-22 09:55:40,180 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 219 transitions. Word has length 142 [2018-10-22 09:55:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:40,180 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 219 transitions. [2018-10-22 09:55:40,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 09:55:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 219 transitions. [2018-10-22 09:55:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-22 09:55:40,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:40,187 INFO L375 BasicCegarLoop]: trace histogram [24, 20, 20, 20, 20, 20, 20, 20, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:40,187 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:40,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:40,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1210906591, now seen corresponding path program 6 times [2018-10-22 09:55:40,188 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:40,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:40,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:55:40,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:40,189 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 677 proven. 90 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2018-10-22 09:55:40,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:40,422 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:40,422 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:55:40,422 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:55:40,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:40,422 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:40,431 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:55:40,431 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:55:40,510 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 09:55:40,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:40,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 1376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-10-22 09:55:40,766 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 1376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-10-22 09:55:41,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:41,034 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:41,051 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:55:41,051 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:55:41,141 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 09:55:41,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:41,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 1376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-10-22 09:55:41,222 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 1376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-10-22 09:55:41,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:41,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12, 12, 12] total 34 [2018-10-22 09:55:41,345 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:41,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 09:55:41,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 09:55:41,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 09:55:41,347 INFO L87 Difference]: Start difference. First operand 215 states and 219 transitions. Second operand 24 states. [2018-10-22 09:55:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:45,581 INFO L93 Difference]: Finished difference Result 540 states and 556 transitions. [2018-10-22 09:55:45,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-22 09:55:45,582 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 214 [2018-10-22 09:55:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:45,584 INFO L225 Difference]: With dead ends: 540 [2018-10-22 09:55:45,584 INFO L226 Difference]: Without dead ends: 386 [2018-10-22 09:55:45,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7087 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4690, Invalid=15902, Unknown=0, NotChecked=0, Total=20592 [2018-10-22 09:55:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-10-22 09:55:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 303. [2018-10-22 09:55:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-10-22 09:55:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 308 transitions. [2018-10-22 09:55:45,610 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 308 transitions. Word has length 214 [2018-10-22 09:55:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:45,611 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 308 transitions. [2018-10-22 09:55:45,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 09:55:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 308 transitions. [2018-10-22 09:55:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-22 09:55:45,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:45,617 INFO L375 BasicCegarLoop]: trace histogram [35, 30, 30, 30, 30, 30, 30, 30, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:45,617 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:45,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:45,618 INFO L82 PathProgramCache]: Analyzing trace with hash 262650846, now seen corresponding path program 7 times [2018-10-22 09:55:45,618 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:45,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:45,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:55:45,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:45,619 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3870 backedges. 0 proven. 3210 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-22 09:55:45,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:45,981 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:45,982 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:55:45,982 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:55:45,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:45,982 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:45,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:45,990 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:46,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3870 backedges. 1270 proven. 132 refuted. 0 times theorem prover too weak. 2468 trivial. 0 not checked. [2018-10-22 09:55:46,357 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3870 backedges. 1270 proven. 132 refuted. 0 times theorem prover too weak. 2468 trivial. 0 not checked. [2018-10-22 09:55:46,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:46,970 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:46,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:46,986 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:47,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3870 backedges. 1270 proven. 132 refuted. 0 times theorem prover too weak. 2468 trivial. 0 not checked. [2018-10-22 09:55:47,194 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3870 backedges. 1270 proven. 132 refuted. 0 times theorem prover too weak. 2468 trivial. 0 not checked. [2018-10-22 09:55:47,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:47,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16, 16, 16] total 42 [2018-10-22 09:55:47,267 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:47,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 09:55:47,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 09:55:47,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 09:55:47,269 INFO L87 Difference]: Start difference. First operand 303 states and 308 transitions. Second operand 28 states. [2018-10-22 09:55:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:53,235 INFO L93 Difference]: Finished difference Result 737 states and 756 transitions. [2018-10-22 09:55:53,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-10-22 09:55:53,236 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 302 [2018-10-22 09:55:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:53,239 INFO L225 Difference]: With dead ends: 737 [2018-10-22 09:55:53,239 INFO L226 Difference]: Without dead ends: 503 [2018-10-22 09:55:53,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1370 GetRequests, 1180 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13053 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8452, Invalid=28220, Unknown=0, NotChecked=0, Total=36672 [2018-10-22 09:55:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2018-10-22 09:55:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 407. [2018-10-22 09:55:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-22 09:55:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 413 transitions. [2018-10-22 09:55:53,267 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 413 transitions. Word has length 302 [2018-10-22 09:55:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:53,268 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 413 transitions. [2018-10-22 09:55:53,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 09:55:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 413 transitions. [2018-10-22 09:55:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-10-22 09:55:53,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:53,274 INFO L375 BasicCegarLoop]: trace histogram [48, 42, 42, 42, 42, 42, 42, 42, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:53,274 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:53,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:53,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1232151689, now seen corresponding path program 8 times [2018-10-22 09:55:53,275 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:53,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:53,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:53,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:53,276 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7524 backedges. 0 proven. 6432 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2018-10-22 09:55:53,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:53,811 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:55:53,811 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:55:53,811 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:55:53,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:53,811 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:55:53,820 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:55:53,820 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:55:53,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:55:53,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:53,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7524 backedges. 2127 proven. 182 refuted. 0 times theorem prover too weak. 5215 trivial. 0 not checked. [2018-10-22 09:55:54,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7524 backedges. 2127 proven. 182 refuted. 0 times theorem prover too weak. 5215 trivial. 0 not checked. [2018-10-22 09:55:54,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:54,826 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:54,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:55:54,844 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:55:55,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:55:55,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:55,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7524 backedges. 2127 proven. 182 refuted. 0 times theorem prover too weak. 5215 trivial. 0 not checked. [2018-10-22 09:55:55,131 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7524 backedges. 2127 proven. 182 refuted. 0 times theorem prover too weak. 5215 trivial. 0 not checked. [2018-10-22 09:55:55,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:55:55,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18, 18, 18] total 48 [2018-10-22 09:55:55,286 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:55,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 09:55:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 09:55:55,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 09:55:55,288 INFO L87 Difference]: Start difference. First operand 407 states and 413 transitions. Second operand 32 states. [2018-10-22 09:56:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:56:03,825 INFO L93 Difference]: Finished difference Result 966 states and 988 transitions. [2018-10-22 09:56:03,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2018-10-22 09:56:03,825 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 406 [2018-10-22 09:56:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:56:03,829 INFO L225 Difference]: With dead ends: 966 [2018-10-22 09:56:03,829 INFO L226 Difference]: Without dead ends: 636 [2018-10-22 09:56:03,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1834 GetRequests, 1592 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22280 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=13126, Invalid=46166, Unknown=0, NotChecked=0, Total=59292 [2018-10-22 09:56:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2018-10-22 09:56:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 527. [2018-10-22 09:56:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-10-22 09:56:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 534 transitions. [2018-10-22 09:56:03,863 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 534 transitions. Word has length 406 [2018-10-22 09:56:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:56:03,864 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 534 transitions. [2018-10-22 09:56:03,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 09:56:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 534 transitions. [2018-10-22 09:56:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2018-10-22 09:56:03,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:56:03,868 INFO L375 BasicCegarLoop]: trace histogram [63, 56, 56, 56, 56, 56, 56, 56, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:56:03,868 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:56:03,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:56:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1985609694, now seen corresponding path program 9 times [2018-10-22 09:56:03,869 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:56:03,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:56:03,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:56:03,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:56:03,870 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:56:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:56:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13286 backedges. 0 proven. 11606 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2018-10-22 09:56:05,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:05,256 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:56:05,256 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:56:05,256 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:56:05,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:05,256 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:56:05,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:56:05,267 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:56:05,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 09:56:05,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:56:05,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:56:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13286 backedges. 3308 proven. 240 refuted. 0 times theorem prover too weak. 9738 trivial. 0 not checked. [2018-10-22 09:56:06,100 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:56:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13286 backedges. 32 proven. 3516 refuted. 0 times theorem prover too weak. 9738 trivial. 0 not checked. [2018-10-22 09:56:06,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:06,769 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:56:06,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:56:06,795 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:56:07,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 09:56:07,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:56:07,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:56:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13286 backedges. 3308 proven. 240 refuted. 0 times theorem prover too weak. 9738 trivial. 0 not checked. [2018-10-22 09:56:07,336 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:56:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13286 backedges. 32 proven. 3516 refuted. 0 times theorem prover too weak. 9738 trivial. 0 not checked. [2018-10-22 09:56:07,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:56:07,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20, 20, 20] total 54 [2018-10-22 09:56:07,765 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:56:07,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 09:56:07,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 09:56:07,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 09:56:07,767 INFO L87 Difference]: Start difference. First operand 527 states and 534 transitions. Second operand 36 states. [2018-10-22 09:56:09,606 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-22 09:56:21,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:56:21,975 INFO L93 Difference]: Finished difference Result 1227 states and 1252 transitions. [2018-10-22 09:56:21,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2018-10-22 09:56:21,976 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 526 [2018-10-22 09:56:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:56:21,980 INFO L225 Difference]: With dead ends: 1227 [2018-10-22 09:56:21,980 INFO L226 Difference]: Without dead ends: 785 [2018-10-22 09:56:21,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2368 GetRequests, 2068 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35690 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=19436, Invalid=71466, Unknown=0, NotChecked=0, Total=90902 [2018-10-22 09:56:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2018-10-22 09:56:22,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 663. [2018-10-22 09:56:22,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2018-10-22 09:56:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 671 transitions. [2018-10-22 09:56:22,022 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 671 transitions. Word has length 526 [2018-10-22 09:56:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:56:22,022 INFO L481 AbstractCegarLoop]: Abstraction has 663 states and 671 transitions. [2018-10-22 09:56:22,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 09:56:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 671 transitions. [2018-10-22 09:56:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2018-10-22 09:56:22,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:56:22,028 INFO L375 BasicCegarLoop]: trace histogram [80, 72, 72, 72, 72, 72, 72, 72, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:56:22,028 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:56:22,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:56:22,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1735145641, now seen corresponding path program 10 times [2018-10-22 09:56:22,029 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:56:22,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:56:22,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:56:22,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:56:22,030 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:56:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:56:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 4825 proven. 306 refuted. 0 times theorem prover too weak. 16709 trivial. 0 not checked. [2018-10-22 09:56:22,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:22,972 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:56:22,972 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:56:22,972 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:56:22,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:22,972 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:56:22,981 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:56:22,981 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:56:23,112 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:56:23,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:56:23,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:56:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 4825 proven. 306 refuted. 0 times theorem prover too weak. 16709 trivial. 0 not checked. [2018-10-22 09:56:24,021 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:56:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 4825 proven. 306 refuted. 0 times theorem prover too weak. 16709 trivial. 0 not checked. [2018-10-22 09:56:24,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:24,442 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:56:24,459 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:56:24,459 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:56:24,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:56:24,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:56:24,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:56:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 4825 proven. 306 refuted. 0 times theorem prover too weak. 16709 trivial. 0 not checked. [2018-10-22 09:56:25,093 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:56:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21840 backedges. 4825 proven. 306 refuted. 0 times theorem prover too weak. 16709 trivial. 0 not checked. [2018-10-22 09:56:25,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:56:25,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 22] total 41 [2018-10-22 09:56:25,586 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:56:25,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 09:56:25,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 09:56:25,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1280, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 09:56:25,588 INFO L87 Difference]: Start difference. First operand 663 states and 671 transitions. Second operand 41 states. [2018-10-22 09:56:26,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:56:26,018 INFO L93 Difference]: Finished difference Result 1337 states and 1360 transitions. [2018-10-22 09:56:26,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 09:56:26,023 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 662 [2018-10-22 09:56:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:56:26,027 INFO L225 Difference]: With dead ends: 1337 [2018-10-22 09:56:26,028 INFO L226 Difference]: Without dead ends: 767 [2018-10-22 09:56:26,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2687 GetRequests, 2589 SyntacticMatches, 40 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=977, Invalid=2563, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 09:56:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-10-22 09:56:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 727. [2018-10-22 09:56:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2018-10-22 09:56:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 735 transitions. [2018-10-22 09:56:26,073 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 735 transitions. Word has length 662 [2018-10-22 09:56:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:56:26,074 INFO L481 AbstractCegarLoop]: Abstraction has 727 states and 735 transitions. [2018-10-22 09:56:26,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 09:56:26,074 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 735 transitions. [2018-10-22 09:56:26,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2018-10-22 09:56:26,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:56:26,082 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 80, 80, 80, 80, 80, 80, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:56:26,082 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:56:26,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:56:26,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1605709921, now seen corresponding path program 11 times [2018-10-22 09:56:26,083 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:56:26,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:56:26,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:56:26,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:56:26,084 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:56:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:56:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 26800 backedges. 0 proven. 23760 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2018-10-22 09:56:27,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:27,364 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:56:27,365 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:56:27,365 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:56:27,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:27,365 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:56:27,373 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:56:27,373 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:56:27,890 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-10-22 09:56:27,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:56:27,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:56:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 26800 backedges. 0 proven. 23760 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2018-10-22 09:56:29,458 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:56:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 26800 backedges. 0 proven. 23760 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2018-10-22 09:56:30,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:30,329 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:56:30,349 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:56:30,349 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:56:32,574 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-10-22 09:56:32,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:56:32,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:56:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 26800 backedges. 0 proven. 23760 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2018-10-22 09:56:33,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:56:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 26800 backedges. 0 proven. 23760 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2018-10-22 09:56:33,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:56:33,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20] total 40 [2018-10-22 09:56:33,969 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:56:33,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 09:56:33,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 09:56:33,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 09:56:33,971 INFO L87 Difference]: Start difference. First operand 727 states and 735 transitions. Second operand 37 states. [2018-10-22 09:56:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:56:34,335 INFO L93 Difference]: Finished difference Result 905 states and 915 transitions. [2018-10-22 09:56:34,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 09:56:34,336 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 726 [2018-10-22 09:56:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:56:34,341 INFO L225 Difference]: With dead ends: 905 [2018-10-22 09:56:34,341 INFO L226 Difference]: Without dead ends: 900 [2018-10-22 09:56:34,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2938 GetRequests, 2854 SyntacticMatches, 30 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2005 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=875, Invalid=2205, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 09:56:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2018-10-22 09:56:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 815. [2018-10-22 09:56:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 815 states. [2018-10-22 09:56:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 824 transitions. [2018-10-22 09:56:34,387 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 824 transitions. Word has length 726 [2018-10-22 09:56:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:56:34,388 INFO L481 AbstractCegarLoop]: Abstraction has 815 states and 824 transitions. [2018-10-22 09:56:34,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 09:56:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 824 transitions. [2018-10-22 09:56:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2018-10-22 09:56:34,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:56:34,395 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 90, 90, 90, 90, 90, 90, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:56:34,396 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:56:34,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:56:34,396 INFO L82 PathProgramCache]: Analyzing trace with hash 519365662, now seen corresponding path program 12 times [2018-10-22 09:56:34,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:56:34,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:56:34,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:56:34,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:56:34,399 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:56:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:56:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 33966 backedges. 0 proven. 30546 refuted. 0 times theorem prover too weak. 3420 trivial. 0 not checked. [2018-10-22 09:56:35,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:35,727 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:56:35,728 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:56:35,728 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:56:35,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:35,728 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:56:35,736 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:56:35,736 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:56:36,062 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-10-22 09:56:36,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:56:36,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:56:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 33966 backedges. 0 proven. 30546 refuted. 0 times theorem prover too weak. 3420 trivial. 0 not checked. [2018-10-22 09:56:37,386 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:56:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 33966 backedges. 0 proven. 30546 refuted. 0 times theorem prover too weak. 3420 trivial. 0 not checked. [2018-10-22 09:56:38,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:56:38,559 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:56:38,574 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:56:38,574 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:56:41,755 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-10-22 09:56:41,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:56:41,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:56:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 33966 backedges. 0 proven. 30546 refuted. 0 times theorem prover too weak. 3420 trivial. 0 not checked. [2018-10-22 09:56:42,713 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:56:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 33966 backedges. 0 proven. 30546 refuted. 0 times theorem prover too weak. 3420 trivial. 0 not checked. [2018-10-22 09:56:45,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:56:45,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 22] total 41 [2018-10-22 09:56:45,223 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:56:45,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 09:56:45,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 09:56:45,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1280, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 09:56:45,225 INFO L87 Difference]: Start difference. First operand 815 states and 824 transitions. Second operand 41 states. [2018-10-22 09:56:45,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:56:45,725 INFO L93 Difference]: Finished difference Result 993 states and 1004 transitions. [2018-10-22 09:56:45,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 09:56:45,726 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 814 [2018-10-22 09:56:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:56:45,731 INFO L225 Difference]: With dead ends: 993 [2018-10-22 09:56:45,731 INFO L226 Difference]: Without dead ends: 988 [2018-10-22 09:56:45,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3295 GetRequests, 3197 SyntacticMatches, 40 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=977, Invalid=2563, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 09:56:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2018-10-22 09:56:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 903. [2018-10-22 09:56:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 903 states. [2018-10-22 09:56:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 913 transitions. [2018-10-22 09:56:45,788 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 913 transitions. Word has length 814 [2018-10-22 09:56:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:56:45,790 INFO L481 AbstractCegarLoop]: Abstraction has 903 states and 913 transitions. [2018-10-22 09:56:45,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 09:56:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 913 transitions. [2018-10-22 09:56:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 903 [2018-10-22 09:56:45,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:56:45,801 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 100, 100, 100, 100, 100, 100, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:56:45,801 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:56:45,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:56:45,803 INFO L82 PathProgramCache]: Analyzing trace with hash -760215333, now seen corresponding path program 13 times [2018-10-22 09:56:45,804 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:56:45,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:56:45,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:56:45,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:56:45,805 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:56:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:57:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 41980 backedges. 41962 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-22 09:57:00,533 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:57:00,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [205] imperfect sequences [] total 205 [2018-10-22 09:57:00,534 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:57:00,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 205 states [2018-10-22 09:57:00,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2018-10-22 09:57:00,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10407, Invalid=31413, Unknown=0, NotChecked=0, Total=41820 [2018-10-22 09:57:00,539 INFO L87 Difference]: Start difference. First operand 903 states and 913 transitions. Second operand 205 states. [2018-10-22 09:57:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:57:17,640 INFO L93 Difference]: Finished difference Result 37445 states and 37905 transitions. [2018-10-22 09:57:17,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 305 states. [2018-10-22 09:57:17,640 INFO L78 Accepts]: Start accepts. Automaton has 205 states. Word has length 902 [2018-10-22 09:57:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:57:17,642 INFO L225 Difference]: With dead ends: 37445 [2018-10-22 09:57:17,643 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 09:57:17,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30200 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=51011, Invalid=113419, Unknown=0, NotChecked=0, Total=164430 [2018-10-22 09:57:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 09:57:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 09:57:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 09:57:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 09:57:17,708 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 902 [2018-10-22 09:57:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:57:17,709 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 09:57:17,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 205 states. [2018-10-22 09:57:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 09:57:17,709 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 09:57:17,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 09:57:26,753 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:26,798 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:26,853 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:29,336 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:29,480 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:29,849 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:29,892 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:30,365 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:30,414 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:32,218 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:32,801 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:32,926 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:33,140 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:37,485 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:38,267 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:40,242 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:45,585 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:46,767 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:57:48,746 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 09:58:00,129 WARN L179 SmtUtils]: Spent 42.38 s on a formula simplification. DAG size of input: 5124 DAG size of output: 1319 [2018-10-22 09:58:01,241 WARN L179 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 687 DAG size of output: 678 [2018-10-22 09:58:35,293 WARN L179 SmtUtils]: Spent 34.03 s on a formula simplification. DAG size of input: 1306 DAG size of output: 354 [2018-10-22 09:58:41,953 WARN L179 SmtUtils]: Spent 6.64 s on a formula simplification. DAG size of input: 678 DAG size of output: 59 [2018-10-22 09:58:41,956 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 09:58:41,956 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:58:41,956 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:58:41,957 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 09:58:41,957 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 09:58:41,957 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 09:58:41,957 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 24) no Hoare annotation was computed. [2018-10-22 09:58:41,957 INFO L425 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2018-10-22 09:58:41,957 INFO L425 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-10-22 09:58:41,957 INFO L425 ceAbstractionStarter]: For program point L19-2(line 19) no Hoare annotation was computed. [2018-10-22 09:58:41,957 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-10-22 09:58:41,957 INFO L425 ceAbstractionStarter]: For program point L15-1(line 15) no Hoare annotation was computed. [2018-10-22 09:58:41,957 INFO L425 ceAbstractionStarter]: For program point L11(line 11) no Hoare annotation was computed. [2018-10-22 09:58:41,957 INFO L425 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-10-22 09:58:41,958 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-10-22 09:58:41,958 INFO L425 ceAbstractionStarter]: For program point L16-1(line 16) no Hoare annotation was computed. [2018-10-22 09:58:41,958 INFO L425 ceAbstractionStarter]: For program point L12(line 12) no Hoare annotation was computed. [2018-10-22 09:58:41,958 INFO L425 ceAbstractionStarter]: For program point L12-1(line 12) no Hoare annotation was computed. [2018-10-22 09:58:41,958 INFO L425 ceAbstractionStarter]: For program point L12-2(line 12) no Hoare annotation was computed. [2018-10-22 09:58:41,958 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-10-22 09:58:41,958 INFO L425 ceAbstractionStarter]: For program point L17-2(lines 17 21) no Hoare annotation was computed. [2018-10-22 09:58:41,958 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-10-22 09:58:41,958 INFO L425 ceAbstractionStarter]: For program point L17-4(lines 17 21) no Hoare annotation was computed. [2018-10-22 09:58:41,958 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 24) no Hoare annotation was computed. [2018-10-22 09:58:41,958 INFO L425 ceAbstractionStarter]: For program point L17-5(line 17) no Hoare annotation was computed. [2018-10-22 09:58:41,959 INFO L425 ceAbstractionStarter]: For program point L17-6(line 17) no Hoare annotation was computed. [2018-10-22 09:58:41,959 INFO L421 ceAbstractionStarter]: At program point L17-7(lines 17 21) the Hoare annotation is: (let ((.cse0 (<= 10 main_~m~0)) (.cse1 (<= 10 main_~n~0))) (or (and .cse0 (<= 100 main_~k~0) .cse1) (and .cse0 (<= 0 main_~k~0) (<= main_~i~0 0) .cse1) (and .cse0 (<= 60 main_~k~0) (<= main_~i~0 6) .cse1) (and (<= 50 main_~k~0) .cse0 (<= main_~i~0 5) .cse1) (and .cse0 (<= 10 main_~k~0) (<= main_~i~0 1) .cse1) (and (<= 80 main_~k~0) .cse0 (<= main_~i~0 8) .cse1) (and (<= 70 main_~k~0) .cse0 (<= main_~i~0 7) .cse1) (and .cse0 (<= 20 main_~k~0) (<= main_~i~0 2) .cse1) (and .cse0 (<= main_~i~0 9) .cse1 (<= 90 main_~k~0)) (and .cse0 (<= 40 main_~k~0) (<= main_~i~0 4) .cse1) (and (<= 30 main_~k~0) (<= main_~i~0 3) .cse0 .cse1))) [2018-10-22 09:58:41,959 INFO L421 ceAbstractionStarter]: At program point L17-8(lines 17 21) the Hoare annotation is: (and (<= 10 main_~m~0) (<= 100 main_~k~0) (<= 10 main_~n~0)) [2018-10-22 09:58:41,959 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 24) the Hoare annotation is: true [2018-10-22 09:58:41,959 INFO L425 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-10-22 09:58:41,959 INFO L425 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-10-22 09:58:41,960 INFO L425 ceAbstractionStarter]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2018-10-22 09:58:41,960 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-22 09:58:41,960 INFO L425 ceAbstractionStarter]: For program point L18-4(lines 18 20) no Hoare annotation was computed. [2018-10-22 09:58:41,960 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-10-22 09:58:41,960 INFO L425 ceAbstractionStarter]: For program point L18-5(line 18) no Hoare annotation was computed. [2018-10-22 09:58:41,960 INFO L425 ceAbstractionStarter]: For program point L18-6(line 18) no Hoare annotation was computed. [2018-10-22 09:58:41,962 INFO L421 ceAbstractionStarter]: At program point L18-7(lines 18 20) the Hoare annotation is: (let ((.cse23 (<= main_~j~0 1)) (.cse0 (<= 10 main_~m~0)) (.cse6 (<= main_~j~0 0)) (.cse3 (<= 10 main_~n~0))) (let ((.cse20 (<= 80 main_~k~0)) (.cse4 (<= 10 main_~k~0)) (.cse31 (<= 30 main_~k~0)) (.cse26 (<= 20 main_~k~0)) (.cse5 (<= main_~i~0 1)) (.cse15 (and .cse0 .cse6 .cse3)) (.cse32 (<= 60 main_~k~0)) (.cse27 (<= 50 main_~k~0)) (.cse14 (<= 70 main_~k~0)) (.cse8 (<= main_~j~0 3)) (.cse9 (<= main_~i~0 7)) (.cse7 (<= main_~j~0 2)) (.cse24 (<= main_~i~0 4)) (.cse30 (<= main_~i~0 3)) (.cse29 (<= 40 main_~k~0)) (.cse18 (<= main_~i~0 6)) (.cse17 (<= main_~j~0 4)) (.cse1 (<= main_~i~0 2)) (.cse13 (<= main_~j~0 6)) (.cse11 (and .cse0 .cse23)) (.cse19 (<= main_~j~0 5)) (.cse16 (<= main_~j~0 9)) (.cse10 (<= main_~i~0 0)) (.cse12 (<= (+ main_~i~0 1) main_~n~0)) (.cse22 (<= main_~j~0 8)) (.cse28 (<= main_~i~0 5)) (.cse2 (<= main_~j~0 7)) (.cse21 (<= main_~i~0 8)) (.cse25 (<= 90 main_~k~0))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 27 main_~k~0)) (and .cse0 .cse4 .cse5 .cse6 .cse3) (and .cse0 .cse5 .cse7 (<= 12 main_~k~0) .cse3) (and .cse0 .cse8 .cse9 .cse3 (<= 73 main_~k~0)) (and .cse0 (<= 0 main_~k~0) .cse6 .cse10 .cse3) (and .cse11 (<= 71 main_~k~0) .cse9 .cse3) (and (and .cse12 .cse0 .cse2 .cse3) (<= 97 main_~k~0)) (and (and .cse12 .cse0 .cse7 .cse3) (<= 92 main_~k~0)) (and (<= 16 main_~k~0) .cse0 .cse5 .cse3 .cse13) (and .cse0 .cse7 .cse9 (<= 72 main_~k~0) .cse3) (and .cse14 .cse9 .cse15) (and (<= 99 main_~k~0) (and .cse12 .cse0 .cse16 .cse3)) (and (<= 74 main_~k~0) .cse0 .cse17 .cse9 .cse3) (and (<= 66 main_~k~0) .cse0 .cse18 .cse3 .cse13) (and .cse19 .cse0 (<= 65 main_~k~0) .cse18 .cse3) (and .cse0 (<= 29 main_~k~0) .cse1 .cse16 .cse3) (and .cse20 .cse21 .cse15) (and .cse19 .cse0 (<= 5 main_~k~0) .cse10 .cse3) (and .cse22 .cse0 (<= 78 main_~k~0) .cse9 .cse3) (and .cse0 .cse8 .cse5 (<= 13 main_~k~0) .cse3) (and (<= 2 main_~k~0) .cse0 .cse7 .cse10 .cse3) (and (and .cse12 .cse22 .cse0 .cse3) (<= 98 main_~k~0)) (and (<= 14 main_~k~0) .cse0 .cse5 .cse17 .cse3) (and .cse0 .cse17 .cse10 (<= 4 main_~k~0) .cse3) (and .cse0 .cse23 .cse24 (<= 41 main_~k~0) .cse3) (and .cse0 .cse23 .cse10 .cse3 (<= 1 main_~k~0)) (and .cse0 .cse5 .cse16 .cse3 (<= 19 main_~k~0)) (and (<= 23 main_~k~0) .cse0 .cse8 .cse1 .cse3) (and .cse0 .cse9 .cse3 .cse13 (<= 76 main_~k~0)) (and (and .cse12 .cse0 .cse8 .cse3) (<= 93 main_~k~0)) (and (and .cse12 .cse15) .cse25) (and .cse22 (<= 28 main_~k~0) .cse0 .cse1 .cse3) (and .cse0 .cse7 (<= 62 main_~k~0) .cse18 .cse3) (and .cse0 .cse26 .cse1 .cse6 .cse3) (and .cse20 .cse0 .cse9 .cse3) (and .cse27 .cse0 .cse28 .cse6 .cse3) (and .cse0 .cse8 (<= 3 main_~k~0) .cse10 .cse3) (and .cse0 .cse29 .cse24 .cse6 .cse3) (and .cse19 .cse0 (<= 25 main_~k~0) .cse1 .cse3) (and .cse11 (<= 81 main_~k~0) .cse21 .cse3) (and .cse0 .cse5 (<= 17 main_~k~0) .cse2 .cse3) (and .cse30 .cse22 .cse0 (<= 38 main_~k~0) .cse3) (and .cse30 .cse0 (<= 36 main_~k~0) .cse3 .cse13) (and .cse0 .cse24 .cse17 (<= 44 main_~k~0) .cse3) (and .cse19 .cse0 (<= 15 main_~k~0) .cse5 .cse3) (and .cse30 .cse0 .cse7 (<= 32 main_~k~0) .cse3) (and .cse0 (<= 56 main_~k~0) .cse28 .cse3 .cse13) (and (<= 37 main_~k~0) .cse30 .cse0 .cse2 .cse3) (and .cse30 .cse0 .cse23 .cse3 (<= 31 main_~k~0)) (and (<= 54 main_~k~0) .cse0 .cse28 .cse17 .cse3) (and (<= 59 main_~k~0) .cse0 .cse28 .cse16 .cse3) (and .cse0 .cse4 .cse10 .cse3) (and .cse0 .cse8 (<= 63 main_~k~0) .cse18 .cse3) (and .cse0 (<= 64 main_~k~0) .cse17 .cse18 .cse3) (and (<= 86 main_~k~0) .cse0 .cse21 .cse3 .cse13) (and .cse31 .cse0 .cse1 .cse3) (and (<= 83 main_~k~0) .cse0 .cse8 .cse21 .cse3) (and .cse19 .cse0 (<= 85 main_~k~0) .cse21 .cse3) (and .cse0 .cse2 .cse9 .cse3 (<= 77 main_~k~0)) (and (<= 11 main_~k~0) .cse0 .cse23 .cse5 .cse3) (and .cse31 .cse30 .cse0 .cse6 .cse3) (and .cse0 .cse26 .cse5 .cse3) (and .cse19 .cse0 (<= 55 main_~k~0) .cse28 .cse3) (and (and .cse12 .cse0 .cse17 .cse3) (<= 94 main_~k~0)) (and .cse30 .cse19 .cse0 (<= 35 main_~k~0) .cse3) (and (<= 89 main_~k~0) .cse0 .cse21 .cse16 .cse3) (and .cse0 (<= 7 main_~k~0) .cse2 .cse10 .cse3) (and .cse22 .cse0 (<= 18 main_~k~0) .cse5 .cse3) (and .cse32 .cse18 .cse15) (and .cse0 .cse28 (<= 52 main_~k~0) .cse7 .cse3) (and .cse0 .cse21 .cse2 (<= 87 main_~k~0) .cse3) (and (<= 53 main_~k~0) .cse0 .cse8 .cse28 .cse3) (and (<= 58 main_~k~0) .cse22 .cse0 .cse28 .cse3) (and .cse22 .cse0 (<= 8 main_~k~0) .cse10 .cse3) (and .cse0 .cse24 (<= 46 main_~k~0) .cse3 .cse13) (and .cse0 (<= 6 main_~k~0) .cse10 .cse3 .cse13) (and .cse22 .cse0 .cse24 (<= 48 main_~k~0) .cse3) (and .cse30 .cse0 .cse17 (<= 34 main_~k~0) .cse3) (and .cse0 .cse32 .cse28 .cse3) (and (<= 96 main_~k~0) (and .cse12 .cse0 .cse3 .cse13)) (and (<= 91 main_~k~0) (and .cse12 .cse11 .cse3)) (and (<= 82 main_~k~0) .cse0 .cse7 .cse21 .cse3) (and .cse27 .cse0 .cse24 .cse3) (and .cse11 .cse18 (<= 61 main_~k~0) .cse3) (and (<= 69 main_~k~0) .cse0 .cse16 .cse18 .cse3) (and (<= 67 main_~k~0) .cse0 .cse2 .cse18 .cse3) (and .cse0 .cse24 (<= 47 main_~k~0) .cse2 .cse3) (and (<= 21 main_~k~0) .cse0 .cse23 .cse1 .cse3) (and .cse0 .cse1 .cse17 .cse3 (<= 24 main_~k~0)) (and .cse14 .cse0 .cse18 .cse3) (and .cse0 .cse24 .cse7 (<= 42 main_~k~0) .cse3) (and .cse0 .cse16 .cse9 .cse3 (<= 79 main_~k~0)) (and .cse0 .cse8 .cse24 (<= 43 main_~k~0) .cse3) (and (<= 33 main_~k~0) .cse30 .cse0 .cse8 .cse3) (and .cse19 .cse0 (<= 45 main_~k~0) .cse24 .cse3) (and .cse19 .cse0 (<= 75 main_~k~0) .cse9 .cse3) (and .cse0 (<= 22 main_~k~0) .cse1 .cse7 .cse3) (and .cse0 .cse24 .cse16 (<= 49 main_~k~0) .cse3) (and .cse30 .cse0 (<= 39 main_~k~0) .cse16 .cse3) (and .cse30 .cse0 .cse29 .cse3) (and .cse22 .cse0 (<= 68 main_~k~0) .cse18 .cse3) (and .cse0 (<= 84 main_~k~0) .cse17 .cse21 .cse3) (and .cse0 (<= 26 main_~k~0) .cse1 .cse3 .cse13) (and .cse11 .cse28 .cse3 (<= 51 main_~k~0)) (and (<= 95 main_~k~0) (and .cse12 .cse19 .cse0 .cse3)) (and .cse0 (<= 9 main_~k~0) .cse16 .cse10 .cse3) (and (and .cse12 .cse0 .cse3) (<= 100 main_~k~0)) (and .cse22 .cse0 .cse21 .cse3 (<= 88 main_~k~0)) (and .cse0 .cse28 .cse2 .cse3 (<= 57 main_~k~0)) (and .cse0 .cse21 .cse3 .cse25)))) [2018-10-22 09:58:41,962 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 09:58:41,962 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:58:41,962 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 09:58:41,962 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 09:58:41,963 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 09:58:41,963 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:58:42,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:58:42 BoogieIcfgContainer [2018-10-22 09:58:42,026 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 09:58:42,026 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 09:58:42,026 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 09:58:42,026 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 09:58:42,027 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:55:28" (3/4) ... [2018-10-22 09:58:42,037 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 09:58:42,049 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 09:58:42,049 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 09:58:42,049 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 09:58:42,062 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2018-10-22 09:58:42,064 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-10-22 09:58:42,064 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 09:58:42,136 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 09:58:42,136 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 09:58:42,137 INFO L168 Benchmark]: Toolchain (without parser) took 194740.71 ms. Allocated memory was 1.0 GB in the beginning and 4.1 GB in the end (delta: 3.1 GB). Free memory was 950.5 MB in the beginning and 3.6 GB in the end (delta: -2.7 GB). Peak memory consumption was 385.8 MB. Max. memory is 11.5 GB. [2018-10-22 09:58:42,141 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:58:42,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.01 ms. Allocated memory is still 1.0 GB. Free memory was 950.5 MB in the beginning and 939.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:58:42,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.72 ms. Allocated memory is still 1.0 GB. Free memory is still 939.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:58:42,146 INFO L168 Benchmark]: Boogie Preprocessor took 24.97 ms. Allocated memory is still 1.0 GB. Free memory is still 939.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:58:42,146 INFO L168 Benchmark]: RCFGBuilder took 621.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.3 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -199.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2018-10-22 09:58:42,147 INFO L168 Benchmark]: TraceAbstraction took 193643.16 ms. Allocated memory was 1.2 GB in the beginning and 4.1 GB in the end (delta: 2.9 GB). Free memory was 1.1 GB in the beginning and 3.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 3.1 GB. Max. memory is 11.5 GB. [2018-10-22 09:58:42,147 INFO L168 Benchmark]: Witness Printer took 110.35 ms. Allocated memory is still 4.1 GB. Free memory was 3.7 GB in the beginning and 3.6 GB in the end (delta: 63.0 MB). Peak memory consumption was 63.0 MB. Max. memory is 11.5 GB. [2018-10-22 09:58:42,150 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 311.01 ms. Allocated memory is still 1.0 GB. Free memory was 950.5 MB in the beginning and 939.8 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 24.72 ms. Allocated memory is still 1.0 GB. Free memory is still 939.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.97 ms. Allocated memory is still 1.0 GB. Free memory is still 939.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 621.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.3 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -199.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 193643.16 ms. Allocated memory was 1.2 GB in the beginning and 4.1 GB in the end (delta: 2.9 GB). Free memory was 1.1 GB in the beginning and 3.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 3.1 GB. Max. memory is 11.5 GB. * Witness Printer took 110.35 ms. Allocated memory is still 4.1 GB. Free memory was 3.7 GB in the beginning and 3.6 GB in the end (delta: 63.0 MB). Peak memory consumption was 63.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((10 <= m && i <= 2) && j <= 7) && 10 <= n) && 27 <= k) || ((((10 <= m && 10 <= k) && i <= 1) && j <= 0) && 10 <= n)) || ((((10 <= m && i <= 1) && j <= 2) && 12 <= k) && 10 <= n)) || ((((10 <= m && j <= 3) && i <= 7) && 10 <= n) && 73 <= k)) || ((((10 <= m && 0 <= k) && j <= 0) && i <= 0) && 10 <= n)) || ((((10 <= m && j <= 1) && 71 <= k) && i <= 7) && 10 <= n)) || ((((i + 1 <= n && 10 <= m) && j <= 7) && 10 <= n) && 97 <= k)) || ((((i + 1 <= n && 10 <= m) && j <= 2) && 10 <= n) && 92 <= k)) || ((((16 <= k && 10 <= m) && i <= 1) && 10 <= n) && j <= 6)) || ((((10 <= m && j <= 2) && i <= 7) && 72 <= k) && 10 <= n)) || ((70 <= k && i <= 7) && (10 <= m && j <= 0) && 10 <= n)) || (99 <= k && ((i + 1 <= n && 10 <= m) && j <= 9) && 10 <= n)) || ((((74 <= k && 10 <= m) && j <= 4) && i <= 7) && 10 <= n)) || ((((66 <= k && 10 <= m) && i <= 6) && 10 <= n) && j <= 6)) || ((((j <= 5 && 10 <= m) && 65 <= k) && i <= 6) && 10 <= n)) || ((((10 <= m && 29 <= k) && i <= 2) && j <= 9) && 10 <= n)) || ((80 <= k && i <= 8) && (10 <= m && j <= 0) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 5 <= k) && i <= 0) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 78 <= k) && i <= 7) && 10 <= n)) || ((((10 <= m && j <= 3) && i <= 1) && 13 <= k) && 10 <= n)) || ((((2 <= k && 10 <= m) && j <= 2) && i <= 0) && 10 <= n)) || ((((i + 1 <= n && j <= 8) && 10 <= m) && 10 <= n) && 98 <= k)) || ((((14 <= k && 10 <= m) && i <= 1) && j <= 4) && 10 <= n)) || ((((10 <= m && j <= 4) && i <= 0) && 4 <= k) && 10 <= n)) || ((((10 <= m && j <= 1) && i <= 4) && 41 <= k) && 10 <= n)) || ((((10 <= m && j <= 1) && i <= 0) && 10 <= n) && 1 <= k)) || ((((10 <= m && i <= 1) && j <= 9) && 10 <= n) && 19 <= k)) || ((((23 <= k && 10 <= m) && j <= 3) && i <= 2) && 10 <= n)) || ((((10 <= m && i <= 7) && 10 <= n) && j <= 6) && 76 <= k)) || ((((i + 1 <= n && 10 <= m) && j <= 3) && 10 <= n) && 93 <= k)) || ((i + 1 <= n && (10 <= m && j <= 0) && 10 <= n) && 90 <= k)) || ((((j <= 8 && 28 <= k) && 10 <= m) && i <= 2) && 10 <= n)) || ((((10 <= m && j <= 2) && 62 <= k) && i <= 6) && 10 <= n)) || ((((10 <= m && 20 <= k) && i <= 2) && j <= 0) && 10 <= n)) || (((80 <= k && 10 <= m) && i <= 7) && 10 <= n)) || ((((50 <= k && 10 <= m) && i <= 5) && j <= 0) && 10 <= n)) || ((((10 <= m && j <= 3) && 3 <= k) && i <= 0) && 10 <= n)) || ((((10 <= m && 40 <= k) && i <= 4) && j <= 0) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 25 <= k) && i <= 2) && 10 <= n)) || ((((10 <= m && j <= 1) && 81 <= k) && i <= 8) && 10 <= n)) || ((((10 <= m && i <= 1) && 17 <= k) && j <= 7) && 10 <= n)) || ((((i <= 3 && j <= 8) && 10 <= m) && 38 <= k) && 10 <= n)) || ((((i <= 3 && 10 <= m) && 36 <= k) && 10 <= n) && j <= 6)) || ((((10 <= m && i <= 4) && j <= 4) && 44 <= k) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 15 <= k) && i <= 1) && 10 <= n)) || ((((i <= 3 && 10 <= m) && j <= 2) && 32 <= k) && 10 <= n)) || ((((10 <= m && 56 <= k) && i <= 5) && 10 <= n) && j <= 6)) || ((((37 <= k && i <= 3) && 10 <= m) && j <= 7) && 10 <= n)) || ((((i <= 3 && 10 <= m) && j <= 1) && 10 <= n) && 31 <= k)) || ((((54 <= k && 10 <= m) && i <= 5) && j <= 4) && 10 <= n)) || ((((59 <= k && 10 <= m) && i <= 5) && j <= 9) && 10 <= n)) || (((10 <= m && 10 <= k) && i <= 0) && 10 <= n)) || ((((10 <= m && j <= 3) && 63 <= k) && i <= 6) && 10 <= n)) || ((((10 <= m && 64 <= k) && j <= 4) && i <= 6) && 10 <= n)) || ((((86 <= k && 10 <= m) && i <= 8) && 10 <= n) && j <= 6)) || (((30 <= k && 10 <= m) && i <= 2) && 10 <= n)) || ((((83 <= k && 10 <= m) && j <= 3) && i <= 8) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 85 <= k) && i <= 8) && 10 <= n)) || ((((10 <= m && j <= 7) && i <= 7) && 10 <= n) && 77 <= k)) || ((((11 <= k && 10 <= m) && j <= 1) && i <= 1) && 10 <= n)) || ((((30 <= k && i <= 3) && 10 <= m) && j <= 0) && 10 <= n)) || (((10 <= m && 20 <= k) && i <= 1) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 55 <= k) && i <= 5) && 10 <= n)) || ((((i + 1 <= n && 10 <= m) && j <= 4) && 10 <= n) && 94 <= k)) || ((((i <= 3 && j <= 5) && 10 <= m) && 35 <= k) && 10 <= n)) || ((((89 <= k && 10 <= m) && i <= 8) && j <= 9) && 10 <= n)) || ((((10 <= m && 7 <= k) && j <= 7) && i <= 0) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 18 <= k) && i <= 1) && 10 <= n)) || ((60 <= k && i <= 6) && (10 <= m && j <= 0) && 10 <= n)) || ((((10 <= m && i <= 5) && 52 <= k) && j <= 2) && 10 <= n)) || ((((10 <= m && i <= 8) && j <= 7) && 87 <= k) && 10 <= n)) || ((((53 <= k && 10 <= m) && j <= 3) && i <= 5) && 10 <= n)) || ((((58 <= k && j <= 8) && 10 <= m) && i <= 5) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 8 <= k) && i <= 0) && 10 <= n)) || ((((10 <= m && i <= 4) && 46 <= k) && 10 <= n) && j <= 6)) || ((((10 <= m && 6 <= k) && i <= 0) && 10 <= n) && j <= 6)) || ((((j <= 8 && 10 <= m) && i <= 4) && 48 <= k) && 10 <= n)) || ((((i <= 3 && 10 <= m) && j <= 4) && 34 <= k) && 10 <= n)) || (((10 <= m && 60 <= k) && i <= 5) && 10 <= n)) || (96 <= k && ((i + 1 <= n && 10 <= m) && 10 <= n) && j <= 6)) || (91 <= k && (i + 1 <= n && 10 <= m && j <= 1) && 10 <= n)) || ((((82 <= k && 10 <= m) && j <= 2) && i <= 8) && 10 <= n)) || (((50 <= k && 10 <= m) && i <= 4) && 10 <= n)) || ((((10 <= m && j <= 1) && i <= 6) && 61 <= k) && 10 <= n)) || ((((69 <= k && 10 <= m) && j <= 9) && i <= 6) && 10 <= n)) || ((((67 <= k && 10 <= m) && j <= 7) && i <= 6) && 10 <= n)) || ((((10 <= m && i <= 4) && 47 <= k) && j <= 7) && 10 <= n)) || ((((21 <= k && 10 <= m) && j <= 1) && i <= 2) && 10 <= n)) || ((((10 <= m && i <= 2) && j <= 4) && 10 <= n) && 24 <= k)) || (((70 <= k && 10 <= m) && i <= 6) && 10 <= n)) || ((((10 <= m && i <= 4) && j <= 2) && 42 <= k) && 10 <= n)) || ((((10 <= m && j <= 9) && i <= 7) && 10 <= n) && 79 <= k)) || ((((10 <= m && j <= 3) && i <= 4) && 43 <= k) && 10 <= n)) || ((((33 <= k && i <= 3) && 10 <= m) && j <= 3) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 45 <= k) && i <= 4) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 75 <= k) && i <= 7) && 10 <= n)) || ((((10 <= m && 22 <= k) && i <= 2) && j <= 2) && 10 <= n)) || ((((10 <= m && i <= 4) && j <= 9) && 49 <= k) && 10 <= n)) || ((((i <= 3 && 10 <= m) && 39 <= k) && j <= 9) && 10 <= n)) || (((i <= 3 && 10 <= m) && 40 <= k) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 68 <= k) && i <= 6) && 10 <= n)) || ((((10 <= m && 84 <= k) && j <= 4) && i <= 8) && 10 <= n)) || ((((10 <= m && 26 <= k) && i <= 2) && 10 <= n) && j <= 6)) || ((((10 <= m && j <= 1) && i <= 5) && 10 <= n) && 51 <= k)) || (95 <= k && ((i + 1 <= n && j <= 5) && 10 <= m) && 10 <= n)) || ((((10 <= m && 9 <= k) && j <= 9) && i <= 0) && 10 <= n)) || (((i + 1 <= n && 10 <= m) && 10 <= n) && 100 <= k)) || ((((j <= 8 && 10 <= m) && i <= 8) && 10 <= n) && 88 <= k)) || ((((10 <= m && i <= 5) && j <= 7) && 10 <= n) && 57 <= k)) || (((10 <= m && i <= 8) && 10 <= n) && 90 <= k) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((((((((((10 <= m && 100 <= k) && 10 <= n) || (((10 <= m && 0 <= k) && i <= 0) && 10 <= n)) || (((10 <= m && 60 <= k) && i <= 6) && 10 <= n)) || (((50 <= k && 10 <= m) && i <= 5) && 10 <= n)) || (((10 <= m && 10 <= k) && i <= 1) && 10 <= n)) || (((80 <= k && 10 <= m) && i <= 8) && 10 <= n)) || (((70 <= k && 10 <= m) && i <= 7) && 10 <= n)) || (((10 <= m && 20 <= k) && i <= 2) && 10 <= n)) || (((10 <= m && i <= 9) && 10 <= n) && 90 <= k)) || (((10 <= m && 40 <= k) && i <= 4) && 10 <= n)) || (((30 <= k && i <= 3) && 10 <= m) && 10 <= n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 44 locations, 1 error locations. SAFE Result, 193.5s OverallTime, 16 OverallIterations, 110 TraceHistogramMax, 56.3s AutomataDifference, 0.0s DeadEndRemovalTime, 84.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 1733 SDtfs, 8866 SDslu, 9028 SDs, 0 SdLazy, 2756 SolverSat, 1256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17696 GetRequests, 15919 SyntacticMatches, 110 SemanticMatches, 1667 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119853 ImplicationChecksByTransitivity, 73.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=903occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.6s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 796 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 5140 NumberOfFragments, 1929 HoareAnnotationTreeSize, 23 FomulaSimplifications, 6119298 FormulaSimplificationTreeSizeReduction, 43.5s HoareSimplificationTime, 8 FomulaSimplificationsInter, 34513 FormulaSimplificationTreeSizeReductionInter, 40.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 8.1s SatisfiabilityAnalysisTime, 38.7s InterpolantComputationTime, 13167 NumberOfCodeBlocks, 12223 NumberOfCodeBlocksAsserted, 362 NumberOfCheckSat, 21231 ConstructedInterpolants, 0 QuantifiedInterpolants, 49179123 SizeOfPredicates, 316 NumberOfNonLiveVariables, 10862 ConjunctsInSsa, 320 ConjunctsInUnsatCore, 64 InterpolantComputations, 4 PerfectInterpolantSequences, 282826/592572 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...