./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i --full-output --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 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-21 12:39:13,684 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-21 12:39:13,687 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-21 12:39:13,701 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-21 12:39:13,701 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-21 12:39:13,703 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-21 12:39:13,704 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-21 12:39:13,709 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-21 12:39:13,711 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-21 12:39:13,712 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-21 12:39:13,713 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-21 12:39:13,713 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-21 12:39:13,714 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-21 12:39:13,716 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-21 12:39:13,717 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-21 12:39:13,718 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-21 12:39:13,719 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-21 12:39:13,721 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-21 12:39:13,723 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-21 12:39:13,725 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-21 12:39:13,726 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-21 12:39:13,727 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-21 12:39:13,730 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-21 12:39:13,730 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-21 12:39:13,731 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-21 12:39:13,732 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-21 12:39:13,733 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-21 12:39:13,734 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-21 12:39:13,735 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-21 12:39:13,736 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-21 12:39:13,736 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-21 12:39:13,737 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-21 12:39:13,737 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-21 12:39:13,738 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-21 12:39:13,739 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-21 12:39:13,740 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-21 12:39:13,740 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-21 12:39:13,762 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-21 12:39:13,764 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-21 12:39:13,765 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-21 12:39:13,765 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-21 12:39:13,765 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-21 12:39:13,765 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-21 12:39:13,765 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-21 12:39:13,765 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-21 12:39:13,766 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-21 12:39:13,766 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-21 12:39:13,766 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-21 12:39:13,767 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-21 12:39:13,769 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-21 12:39:13,769 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-21 12:39:13,769 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-21 12:39:13,769 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-21 12:39:13,770 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-21 12:39:13,770 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-21 12:39:13,770 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-21 12:39:13,770 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-21 12:39:13,770 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-21 12:39:13,770 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-21 12:39:13,771 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-21 12:39:13,771 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-21 12:39:13,771 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-21 12:39:13,771 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-21 12:39:13,771 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-21 12:39:13,772 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-21 12:39:13,775 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-21 12:39:13,775 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-21 12:39:13,775 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-21 12:39:13,776 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-21 12:39:13,776 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-21 12:39:13,776 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-21 12:39:13,777 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 [2018-10-21 12:39:13,850 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-21 12:39:13,872 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-21 12:39:13,877 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-21 12:39:13,879 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-21 12:39:13,879 INFO L276 PluginConnector]: CDTParser initialized [2018-10-21 12:39:13,880 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-21 12:39:13,946 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/293cd5ca0/f375072856964631a6d2614e11995b4c/FLAG3cba6fee3 [2018-10-21 12:39:14,386 INFO L298 CDTParser]: Found 1 translation units. [2018-10-21 12:39:14,389 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-21 12:39:14,400 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/293cd5ca0/f375072856964631a6d2614e11995b4c/FLAG3cba6fee3 [2018-10-21 12:39:14,421 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/293cd5ca0/f375072856964631a6d2614e11995b4c [2018-10-21 12:39:14,427 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-21 12:39:14,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-21 12:39:14,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-21 12:39:14,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-21 12:39:14,440 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-21 12:39:14,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:39:14" (1/1) ... [2018-10-21 12:39:14,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@594b1b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14, skipping insertion in model container [2018-10-21 12:39:14,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:39:14" (1/1) ... [2018-10-21 12:39:14,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-21 12:39:14,483 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-21 12:39:14,669 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:39:14,673 INFO L189 MainTranslator]: Completed pre-run [2018-10-21 12:39:14,691 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:39:14,706 INFO L193 MainTranslator]: Completed translation [2018-10-21 12:39:14,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14 WrapperNode [2018-10-21 12:39:14,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-21 12:39:14,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-21 12:39:14,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-21 12:39:14,708 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-21 12:39:14,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14" (1/1) ... [2018-10-21 12:39:14,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14" (1/1) ... [2018-10-21 12:39:14,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-21 12:39:14,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-21 12:39:14,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-21 12:39:14,726 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-21 12:39:14,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14" (1/1) ... [2018-10-21 12:39:14,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14" (1/1) ... [2018-10-21 12:39:14,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14" (1/1) ... [2018-10-21 12:39:14,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14" (1/1) ... [2018-10-21 12:39:14,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14" (1/1) ... [2018-10-21 12:39:14,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14" (1/1) ... [2018-10-21 12:39:14,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14" (1/1) ... [2018-10-21 12:39:14,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-21 12:39:14,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-21 12:39:14,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-21 12:39:14,747 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-21 12:39:14,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14" (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 [2018-10-21 12:39:14,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-21 12:39:14,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-21 12:39:14,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-21 12:39:14,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-21 12:39:14,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-21 12:39:14,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-21 12:39:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-21 12:39:14,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-21 12:39:15,399 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-21 12:39:15,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:39:15 BoogieIcfgContainer [2018-10-21 12:39:15,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-21 12:39:15,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-21 12:39:15,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-21 12:39:15,405 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-21 12:39:15,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 12:39:14" (1/3) ... [2018-10-21 12:39:15,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b8f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:39:15, skipping insertion in model container [2018-10-21 12:39:15,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:39:14" (2/3) ... [2018-10-21 12:39:15,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b8f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:39:15, skipping insertion in model container [2018-10-21 12:39:15,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:39:15" (3/3) ... [2018-10-21 12:39:15,411 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call_true-termination.i [2018-10-21 12:39:15,423 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-21 12:39:15,434 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-21 12:39:15,450 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-21 12:39:15,485 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-21 12:39:15,486 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-21 12:39:15,486 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-21 12:39:15,486 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-21 12:39:15,487 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-21 12:39:15,487 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-21 12:39:15,487 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-21 12:39:15,487 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-21 12:39:15,487 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-21 12:39:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-10-21 12:39:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-21 12:39:15,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:15,515 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:15,518 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:15,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:15,524 INFO L82 PathProgramCache]: Analyzing trace with hash -702630595, now seen corresponding path program 1 times [2018-10-21 12:39:15,526 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:15,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:15,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:15,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:15,576 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:39:15,643 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:39:15,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-21 12:39:15,643 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:39:15,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-21 12:39:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-21 12:39:15,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-21 12:39:15,667 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-10-21 12:39:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:15,692 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2018-10-21 12:39:15,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-21 12:39:15,693 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-21 12:39:15,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:15,703 INFO L225 Difference]: With dead ends: 43 [2018-10-21 12:39:15,703 INFO L226 Difference]: Without dead ends: 18 [2018-10-21 12:39:15,707 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 [2018-10-21 12:39:15,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-21 12:39:15,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-21 12:39:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-21 12:39:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-21 12:39:15,747 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2018-10-21 12:39:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:15,748 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-21 12:39:15,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-21 12:39:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-21 12:39:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-21 12:39:15,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:15,749 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:15,749 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:15,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:15,750 INFO L82 PathProgramCache]: Analyzing trace with hash -972126638, now seen corresponding path program 1 times [2018-10-21 12:39:15,750 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:15,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:15,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:15,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:15,752 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:39:15,940 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:39:15,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-21 12:39:15,941 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:39:15,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-21 12:39:15,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-21 12:39:15,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-21 12:39:15,944 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2018-10-21 12:39:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:16,139 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-21 12:39:16,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-21 12:39:16,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-21 12:39:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:16,141 INFO L225 Difference]: With dead ends: 29 [2018-10-21 12:39:16,141 INFO L226 Difference]: Without dead ends: 24 [2018-10-21 12:39:16,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-21 12:39:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-21 12:39:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-10-21 12:39:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-21 12:39:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-21 12:39:16,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2018-10-21 12:39:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:16,155 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-21 12:39:16,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-21 12:39:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-21 12:39:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-21 12:39:16,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:16,156 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:16,157 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:16,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:16,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1998515670, now seen corresponding path program 1 times [2018-10-21 12:39:16,157 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:16,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:16,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:16,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:16,160 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:39:16,256 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:39:16,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-21 12:39:16,257 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:39:16,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-21 12:39:16,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-21 12:39:16,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-21 12:39:16,259 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2018-10-21 12:39:16,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:16,343 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-10-21 12:39:16,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-21 12:39:16,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-10-21 12:39:16,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:16,346 INFO L225 Difference]: With dead ends: 34 [2018-10-21 12:39:16,346 INFO L226 Difference]: Without dead ends: 23 [2018-10-21 12:39:16,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-21 12:39:16,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-21 12:39:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-10-21 12:39:16,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-21 12:39:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-21 12:39:16,358 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2018-10-21 12:39:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:16,363 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-21 12:39:16,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-21 12:39:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-21 12:39:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-21 12:39:16,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:16,364 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:16,365 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:16,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1293803971, now seen corresponding path program 1 times [2018-10-21 12:39:16,365 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:16,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:16,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:16,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:16,369 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:39:16,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:16,490 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:16,490 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-21 12:39:16,493 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [21], [25], [28], [30], [32], [36], [43], [46], [48], [54], [55], [56], [58] [2018-10-21 12:39:16,543 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-21 12:39:16,544 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-21 12:39:17,828 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-21 12:39:17,830 INFO L272 AbstractInterpreter]: Visited 19 different actions 642 times. Merged at 8 different actions 400 times. Widened at 3 different actions 113 times. Found 66 fixpoints after 6 different actions. Largest state had 10 variables. [2018-10-21 12:39:17,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:17,858 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-21 12:39:17,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:17,859 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 [2018-10-21 12:39:17,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:17,873 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:39:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:17,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:39:18,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:39:18,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:18,392 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 [2018-10-21 12:39:18,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:18,409 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:39:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:18,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:39:18,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:39:18,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:18,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 10 [2018-10-21 12:39:18,496 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:18,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-21 12:39:18,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-21 12:39:18,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-21 12:39:18,497 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2018-10-21 12:39:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:18,581 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-10-21 12:39:18,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-21 12:39:18,582 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-10-21 12:39:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:18,583 INFO L225 Difference]: With dead ends: 39 [2018-10-21 12:39:18,583 INFO L226 Difference]: Without dead ends: 26 [2018-10-21 12:39:18,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-21 12:39:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-21 12:39:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-21 12:39:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-21 12:39:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-21 12:39:18,591 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2018-10-21 12:39:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:18,592 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-21 12:39:18,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-21 12:39:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-21 12:39:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-21 12:39:18,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:18,594 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:18,595 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:18,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:18,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1379909750, now seen corresponding path program 2 times [2018-10-21 12:39:18,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:18,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:18,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:18,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:18,597 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:39:18,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:18,709 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:18,709 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:18,709 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:18,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:18,709 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 [2018-10-21 12:39:18,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:39:18,737 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:39:18,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:39:18,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:18,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-21 12:39:18,920 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-21 12:39:19,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:19,121 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 [2018-10-21 12:39:19,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:39:19,137 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:39:19,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:39:19,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:19,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-21 12:39:19,176 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-21 12:39:19,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:19,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-10-21 12:39:19,204 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:19,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-21 12:39:19,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-21 12:39:19,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-10-21 12:39:19,205 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2018-10-21 12:39:19,598 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-21 12:39:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:19,917 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2018-10-21 12:39:19,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-21 12:39:19,918 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-10-21 12:39:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:19,920 INFO L225 Difference]: With dead ends: 73 [2018-10-21 12:39:19,920 INFO L226 Difference]: Without dead ends: 57 [2018-10-21 12:39:19,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2018-10-21 12:39:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-21 12:39:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2018-10-21 12:39:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-21 12:39:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-21 12:39:19,929 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 24 [2018-10-21 12:39:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:19,930 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-21 12:39:19,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-21 12:39:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-21 12:39:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-21 12:39:19,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:19,932 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:19,932 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:19,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:19,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1699386968, now seen corresponding path program 3 times [2018-10-21 12:39:19,932 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:19,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:19,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:19,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:19,934 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 45 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-21 12:39:20,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:20,052 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:20,052 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:20,053 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:20,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:20,053 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 [2018-10-21 12:39:20,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-21 12:39:20,074 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-21 12:39:20,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-21 12:39:20,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:20,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-21 12:39:20,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-21 12:39:20,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:20,345 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 [2018-10-21 12:39:20,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-21 12:39:20,361 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-21 12:39:20,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-21 12:39:20,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:20,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-21 12:39:20,405 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-21 12:39:20,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:20,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 6, 6] total 15 [2018-10-21 12:39:20,428 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:20,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-21 12:39:20,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-21 12:39:20,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-10-21 12:39:20,431 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 11 states. [2018-10-21 12:39:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:21,212 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2018-10-21 12:39:21,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-21 12:39:21,213 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-10-21 12:39:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:21,215 INFO L225 Difference]: With dead ends: 106 [2018-10-21 12:39:21,215 INFO L226 Difference]: Without dead ends: 84 [2018-10-21 12:39:21,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2018-10-21 12:39:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-21 12:39:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2018-10-21 12:39:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-21 12:39:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2018-10-21 12:39:21,239 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 41 [2018-10-21 12:39:21,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:21,239 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2018-10-21 12:39:21,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-21 12:39:21,239 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2018-10-21 12:39:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-21 12:39:21,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:21,243 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:21,243 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:21,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:21,244 INFO L82 PathProgramCache]: Analyzing trace with hash -319190378, now seen corresponding path program 4 times [2018-10-21 12:39:21,244 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:21,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:21,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:21,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:21,246 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-21 12:39:21,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:21,453 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:21,453 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:21,453 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:21,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:21,453 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 [2018-10-21 12:39:21,461 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-21 12:39:21,461 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-21 12:39:21,489 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-21 12:39:21,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:21,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-21 12:39:21,767 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-21 12:39:21,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:21,870 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 [2018-10-21 12:39:21,886 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-21 12:39:21,886 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-21 12:39:21,934 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-21 12:39:21,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:21,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-21 12:39:21,948 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-21 12:39:21,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:21,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 19 [2018-10-21 12:39:21,977 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:21,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-21 12:39:21,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-21 12:39:21,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-21 12:39:21,982 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 13 states. [2018-10-21 12:39:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:22,043 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2018-10-21 12:39:22,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-21 12:39:22,045 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2018-10-21 12:39:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:22,046 INFO L225 Difference]: With dead ends: 119 [2018-10-21 12:39:22,046 INFO L226 Difference]: Without dead ends: 77 [2018-10-21 12:39:22,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-21 12:39:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-21 12:39:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2018-10-21 12:39:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-21 12:39:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2018-10-21 12:39:22,065 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 64 [2018-10-21 12:39:22,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:22,065 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2018-10-21 12:39:22,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-21 12:39:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2018-10-21 12:39:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-21 12:39:22,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:22,074 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 15, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:22,074 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:22,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:22,074 INFO L82 PathProgramCache]: Analyzing trace with hash 414540755, now seen corresponding path program 5 times [2018-10-21 12:39:22,075 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:22,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:22,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:22,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:22,076 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-21 12:39:22,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:22,323 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:22,323 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:22,323 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:22,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:22,324 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 [2018-10-21 12:39:22,335 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-21 12:39:22,335 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:39:22,366 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-21 12:39:22,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:22,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-21 12:39:22,493 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-21 12:39:22,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:22,615 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 [2018-10-21 12:39:22,633 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-21 12:39:22,634 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:39:22,743 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-21 12:39:22,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:22,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-21 12:39:22,761 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-21 12:39:22,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:22,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 20 [2018-10-21 12:39:22,908 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:22,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-21 12:39:22,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-21 12:39:22,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-21 12:39:22,912 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 15 states. [2018-10-21 12:39:22,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:22,986 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2018-10-21 12:39:22,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-21 12:39:22,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-10-21 12:39:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:22,988 INFO L225 Difference]: With dead ends: 134 [2018-10-21 12:39:22,989 INFO L226 Difference]: Without dead ends: 86 [2018-10-21 12:39:22,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 277 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-21 12:39:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-21 12:39:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2018-10-21 12:39:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-21 12:39:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2018-10-21 12:39:23,003 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 73 [2018-10-21 12:39:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:23,004 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2018-10-21 12:39:23,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-21 12:39:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2018-10-21 12:39:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-21 12:39:23,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:23,007 INFO L375 BasicCegarLoop]: trace histogram [21, 18, 18, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:23,007 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:23,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:23,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1138844106, now seen corresponding path program 6 times [2018-10-21 12:39:23,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:23,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:23,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:23,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:23,010 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 274 proven. 57 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2018-10-21 12:39:23,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:23,150 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:23,150 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:23,151 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:23,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:23,151 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 [2018-10-21 12:39:23,159 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-21 12:39:23,159 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-21 12:39:23,275 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-21 12:39:23,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:23,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-21 12:39:23,521 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-21 12:39:23,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:23,682 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 [2018-10-21 12:39:23,706 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-21 12:39:23,706 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-21 12:39:23,772 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-21 12:39:23,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:23,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-21 12:39:23,797 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-21 12:39:23,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:23,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7, 7, 7] total 20 [2018-10-21 12:39:23,830 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:23,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-21 12:39:23,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-21 12:39:23,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2018-10-21 12:39:23,832 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 15 states. [2018-10-21 12:39:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:25,204 INFO L93 Difference]: Finished difference Result 201 states and 214 transitions. [2018-10-21 12:39:25,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-21 12:39:25,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2018-10-21 12:39:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:25,207 INFO L225 Difference]: With dead ends: 201 [2018-10-21 12:39:25,208 INFO L226 Difference]: Without dead ends: 147 [2018-10-21 12:39:25,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1143, Invalid=2397, Unknown=0, NotChecked=0, Total=3540 [2018-10-21 12:39:25,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-21 12:39:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2018-10-21 12:39:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-21 12:39:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2018-10-21 12:39:25,226 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 82 [2018-10-21 12:39:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:25,226 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2018-10-21 12:39:25,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-21 12:39:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2018-10-21 12:39:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-21 12:39:25,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:25,228 INFO L375 BasicCegarLoop]: trace histogram [32, 28, 28, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:25,229 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:25,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:25,229 INFO L82 PathProgramCache]: Analyzing trace with hash -293632002, now seen corresponding path program 7 times [2018-10-21 12:39:25,229 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:25,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:25,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:25,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:25,230 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-21 12:39:25,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:25,374 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:25,374 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:25,374 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:25,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:25,375 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 [2018-10-21 12:39:25,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:25,385 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:39:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:25,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-21 12:39:25,571 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-21 12:39:25,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:25,717 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 [2018-10-21 12:39:25,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:25,733 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:39:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:25,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-21 12:39:25,829 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-21 12:39:25,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:25,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 22 [2018-10-21 12:39:25,910 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:25,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-21 12:39:25,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-21 12:39:25,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-21 12:39:25,911 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 19 states. [2018-10-21 12:39:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:26,017 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2018-10-21 12:39:26,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-21 12:39:26,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 117 [2018-10-21 12:39:26,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:26,021 INFO L225 Difference]: With dead ends: 220 [2018-10-21 12:39:26,021 INFO L226 Difference]: Without dead ends: 134 [2018-10-21 12:39:26,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 445 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-21 12:39:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-21 12:39:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-10-21 12:39:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-21 12:39:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2018-10-21 12:39:26,059 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 117 [2018-10-21 12:39:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:26,060 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2018-10-21 12:39:26,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-21 12:39:26,060 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2018-10-21 12:39:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-21 12:39:26,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:26,068 INFO L375 BasicCegarLoop]: trace histogram [36, 32, 32, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:26,068 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:26,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -210025646, now seen corresponding path program 8 times [2018-10-21 12:39:26,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:26,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:26,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:26,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:26,076 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-21 12:39:26,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:26,293 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:26,293 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:26,293 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:26,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:26,293 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 [2018-10-21 12:39:26,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:39:26,302 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:39:26,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:39:26,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:26,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-21 12:39:26,510 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-21 12:39:26,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:26,654 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 [2018-10-21 12:39:26,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:39:26,671 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:39:26,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:39:26,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:26,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-21 12:39:26,781 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-21 12:39:26,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:26,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 23 [2018-10-21 12:39:26,902 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:26,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-21 12:39:26,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-21 12:39:26,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-21 12:39:26,904 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 21 states. [2018-10-21 12:39:26,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:26,987 INFO L93 Difference]: Finished difference Result 241 states and 252 transitions. [2018-10-21 12:39:26,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-21 12:39:26,988 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 129 [2018-10-21 12:39:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:26,989 INFO L225 Difference]: With dead ends: 241 [2018-10-21 12:39:26,989 INFO L226 Difference]: Without dead ends: 146 [2018-10-21 12:39:26,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 489 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-21 12:39:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-21 12:39:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2018-10-21 12:39:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-21 12:39:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2018-10-21 12:39:27,013 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 129 [2018-10-21 12:39:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:27,013 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2018-10-21 12:39:27,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-21 12:39:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2018-10-21 12:39:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-21 12:39:27,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:27,017 INFO L375 BasicCegarLoop]: trace histogram [40, 36, 36, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:27,017 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:27,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:27,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1652018178, now seen corresponding path program 9 times [2018-10-21 12:39:27,018 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:27,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:27,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:27,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:27,019 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 851 proven. 126 refuted. 0 times theorem prover too weak. 1239 trivial. 0 not checked. [2018-10-21 12:39:27,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:27,232 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:27,232 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:27,232 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:27,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:27,233 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 [2018-10-21 12:39:27,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-21 12:39:27,242 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-21 12:39:27,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-21 12:39:27,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:27,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 854 proven. 126 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-21 12:39:27,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 11 proven. 969 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-21 12:39:27,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:27,563 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 [2018-10-21 12:39:27,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-21 12:39:27,579 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-21 12:39:27,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-21 12:39:27,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:27,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 854 proven. 126 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-21 12:39:27,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 11 proven. 969 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-21 12:39:27,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:27,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 23 [2018-10-21 12:39:27,837 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:27,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-21 12:39:27,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-21 12:39:27,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-21 12:39:27,839 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 23 states. [2018-10-21 12:39:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:27,989 INFO L93 Difference]: Finished difference Result 262 states and 273 transitions. [2018-10-21 12:39:27,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-21 12:39:27,989 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 141 [2018-10-21 12:39:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:27,991 INFO L225 Difference]: With dead ends: 262 [2018-10-21 12:39:27,991 INFO L226 Difference]: Without dead ends: 158 [2018-10-21 12:39:27,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 532 SyntacticMatches, 22 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2018-10-21 12:39:27,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-21 12:39:28,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-10-21 12:39:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-21 12:39:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2018-10-21 12:39:28,008 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 141 [2018-10-21 12:39:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:28,008 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2018-10-21 12:39:28,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-21 12:39:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2018-10-21 12:39:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-21 12:39:28,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:28,012 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 40, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:28,012 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:28,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:28,012 INFO L82 PathProgramCache]: Analyzing trace with hash -969563822, now seen corresponding path program 10 times [2018-10-21 12:39:28,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:28,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:28,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:28,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:28,016 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-21 12:39:28,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:28,199 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:28,199 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:28,199 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:28,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:28,199 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 [2018-10-21 12:39:28,209 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-21 12:39:28,209 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-21 12:39:28,252 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-21 12:39:28,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:28,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-21 12:39:28,435 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-21 12:39:28,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:28,711 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 [2018-10-21 12:39:28,727 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-21 12:39:28,727 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-21 12:39:28,840 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-21 12:39:28,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:28,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-21 12:39:28,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-21 12:39:28,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:28,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 19 [2018-10-21 12:39:28,990 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:28,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-21 12:39:28,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-21 12:39:28,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-21 12:39:28,991 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 13 states. [2018-10-21 12:39:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:29,128 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2018-10-21 12:39:29,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-21 12:39:29,129 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2018-10-21 12:39:29,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:29,131 INFO L225 Difference]: With dead ends: 227 [2018-10-21 12:39:29,131 INFO L226 Difference]: Without dead ends: 222 [2018-10-21 12:39:29,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-21 12:39:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-21 12:39:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 189. [2018-10-21 12:39:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-21 12:39:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2018-10-21 12:39:29,151 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 153 [2018-10-21 12:39:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:29,152 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2018-10-21 12:39:29,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-21 12:39:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2018-10-21 12:39:29,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-21 12:39:29,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:29,157 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 50, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:29,157 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:29,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1779605514, now seen corresponding path program 11 times [2018-10-21 12:39:29,157 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:29,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:29,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:29,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:29,161 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-21 12:39:29,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:29,745 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:29,745 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:29,745 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:29,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:29,745 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 [2018-10-21 12:39:29,754 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-21 12:39:29,754 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:39:29,837 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-21 12:39:29,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:29,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-21 12:39:29,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-21 12:39:30,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:30,336 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 [2018-10-21 12:39:30,353 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-21 12:39:30,353 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:39:30,998 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-21 12:39:30,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:31,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-21 12:39:31,115 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (23)] Exception during sending of exit command (exit): Broken pipe [2018-10-21 12:39:31,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:31,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 20 [2018-10-21 12:39:31,233 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:31,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-21 12:39:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-21 12:39:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-21 12:39:31,234 INFO L87 Difference]: Start difference. First operand 189 states and 194 transitions. Second operand 15 states. [2018-10-21 12:39:31,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:31,542 INFO L93 Difference]: Finished difference Result 262 states and 269 transitions. [2018-10-21 12:39:31,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-21 12:39:31,544 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 188 [2018-10-21 12:39:31,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:31,547 INFO L225 Difference]: With dead ends: 262 [2018-10-21 12:39:31,547 INFO L226 Difference]: Without dead ends: 257 [2018-10-21 12:39:31,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 737 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-21 12:39:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-10-21 12:39:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 224. [2018-10-21 12:39:31,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-21 12:39:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 230 transitions. [2018-10-21 12:39:31,569 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 230 transitions. Word has length 188 [2018-10-21 12:39:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:31,570 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 230 transitions. [2018-10-21 12:39:31,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-21 12:39:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 230 transitions. [2018-10-21 12:39:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-21 12:39:31,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:31,575 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 60, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:31,575 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:31,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:31,576 INFO L82 PathProgramCache]: Analyzing trace with hash 388824786, now seen corresponding path program 12 times [2018-10-21 12:39:31,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:31,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:31,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:31,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:31,577 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-21 12:39:32,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:32,734 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:32,734 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:32,735 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:32,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:32,735 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 [2018-10-21 12:39:32,744 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-21 12:39:32,744 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-21 12:39:32,952 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-21 12:39:32,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:32,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-21 12:39:33,164 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-21 12:39:33,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:33,325 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 [2018-10-21 12:39:33,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-21 12:39:33,341 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-21 12:39:34,049 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-21 12:39:34,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:34,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-21 12:39:34,144 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-21 12:39:34,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:34,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 21 [2018-10-21 12:39:34,295 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:34,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-21 12:39:34,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-21 12:39:34,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-21 12:39:34,298 INFO L87 Difference]: Start difference. First operand 224 states and 230 transitions. Second operand 17 states. [2018-10-21 12:39:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:34,479 INFO L93 Difference]: Finished difference Result 297 states and 305 transitions. [2018-10-21 12:39:34,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-21 12:39:34,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 223 [2018-10-21 12:39:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:34,482 INFO L225 Difference]: With dead ends: 297 [2018-10-21 12:39:34,482 INFO L226 Difference]: Without dead ends: 292 [2018-10-21 12:39:34,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 873 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-21 12:39:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-21 12:39:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 259. [2018-10-21 12:39:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-21 12:39:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 266 transitions. [2018-10-21 12:39:34,508 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 266 transitions. Word has length 223 [2018-10-21 12:39:34,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:34,509 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 266 transitions. [2018-10-21 12:39:34,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-21 12:39:34,509 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 266 transitions. [2018-10-21 12:39:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-21 12:39:34,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:34,514 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 70, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:34,514 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:34,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:34,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1062399370, now seen corresponding path program 13 times [2018-10-21 12:39:34,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:34,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:34,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:34,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:34,518 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-21 12:39:34,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:34,815 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:34,816 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:34,816 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:34,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:34,816 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-21 12:39:34,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:34,837 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:39:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:34,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-21 12:39:35,355 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-21 12:39:35,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:35,624 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 27 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 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-21 12:39:35,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:35,640 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:39:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:35,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-21 12:39:35,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-21 12:39:37,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:37,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 22 [2018-10-21 12:39:37,114 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:37,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-21 12:39:37,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-21 12:39:37,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-21 12:39:37,115 INFO L87 Difference]: Start difference. First operand 259 states and 266 transitions. Second operand 19 states. [2018-10-21 12:39:37,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:37,221 INFO L93 Difference]: Finished difference Result 332 states and 341 transitions. [2018-10-21 12:39:37,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-21 12:39:37,222 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 258 [2018-10-21 12:39:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:37,224 INFO L225 Difference]: With dead ends: 332 [2018-10-21 12:39:37,224 INFO L226 Difference]: Without dead ends: 327 [2018-10-21 12:39:37,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 1009 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-21 12:39:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-21 12:39:37,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 294. [2018-10-21 12:39:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-21 12:39:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 302 transitions. [2018-10-21 12:39:37,256 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 302 transitions. Word has length 258 [2018-10-21 12:39:37,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:37,258 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 302 transitions. [2018-10-21 12:39:37,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-21 12:39:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 302 transitions. [2018-10-21 12:39:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-21 12:39:37,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:37,262 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 80, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:37,262 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:37,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:37,262 INFO L82 PathProgramCache]: Analyzing trace with hash -790873006, now seen corresponding path program 14 times [2018-10-21 12:39:37,262 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:37,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:37,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:39:37,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:37,266 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-21 12:39:37,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:37,682 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:37,683 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:37,684 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:37,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:37,684 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-21 12:39:37,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:39:37,702 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:39:37,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:39:37,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:37,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-21 12:39:38,336 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-21 12:39:38,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:38,544 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 29 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-21 12:39:38,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:39:38,560 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:39:38,739 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:39:38,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:38,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-21 12:39:38,883 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-21 12:39:39,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:39,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 23 [2018-10-21 12:39:39,107 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:39,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-21 12:39:39,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-21 12:39:39,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-21 12:39:39,109 INFO L87 Difference]: Start difference. First operand 294 states and 302 transitions. Second operand 21 states. [2018-10-21 12:39:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:39,228 INFO L93 Difference]: Finished difference Result 367 states and 377 transitions. [2018-10-21 12:39:39,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-21 12:39:39,230 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 293 [2018-10-21 12:39:39,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:39,231 INFO L225 Difference]: With dead ends: 367 [2018-10-21 12:39:39,232 INFO L226 Difference]: Without dead ends: 362 [2018-10-21 12:39:39,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1145 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-21 12:39:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-21 12:39:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 329. [2018-10-21 12:39:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-10-21 12:39:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 338 transitions. [2018-10-21 12:39:39,264 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 338 transitions. Word has length 293 [2018-10-21 12:39:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:39,264 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 338 transitions. [2018-10-21 12:39:39,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-21 12:39:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 338 transitions. [2018-10-21 12:39:39,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-10-21 12:39:39,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:39,269 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 90, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:39,269 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:39,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:39,270 INFO L82 PathProgramCache]: Analyzing trace with hash 547939574, now seen corresponding path program 15 times [2018-10-21 12:39:39,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:39,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:39,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:39,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:39,273 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-21 12:39:39,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:39,787 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:39:39,788 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:39:39,788 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:39:39,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:39,788 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-21 12:39:39,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-21 12:39:39,797 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-21 12:39:39,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-21 12:39:39,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:39,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-21 12:39:40,262 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-21 12:39:40,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:39:40,499 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 31 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 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-21 12:39:40,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-21 12:39:40,514 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-21 12:39:42,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-21 12:39:42,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:39:42,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:39:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-21 12:39:42,667 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:39:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-21 12:39:42,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:39:42,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 23 [2018-10-21 12:39:42,870 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:39:42,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-21 12:39:42,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-21 12:39:42,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-21 12:39:42,872 INFO L87 Difference]: Start difference. First operand 329 states and 338 transitions. Second operand 23 states. [2018-10-21 12:39:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:43,574 INFO L93 Difference]: Finished difference Result 402 states and 413 transitions. [2018-10-21 12:39:43,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-21 12:39:43,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 328 [2018-10-21 12:39:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:43,580 INFO L225 Difference]: With dead ends: 402 [2018-10-21 12:39:43,580 INFO L226 Difference]: Without dead ends: 397 [2018-10-21 12:39:43,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1324 GetRequests, 1280 SyntacticMatches, 22 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2018-10-21 12:39:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2018-10-21 12:39:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 364. [2018-10-21 12:39:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-21 12:39:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 374 transitions. [2018-10-21 12:39:43,638 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 374 transitions. Word has length 328 [2018-10-21 12:39:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:43,641 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 374 transitions. [2018-10-21 12:39:43,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-21 12:39:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 374 transitions. [2018-10-21 12:39:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-21 12:39:43,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:39:43,645 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 100, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:39:43,645 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:39:43,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:39:43,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1390107090, now seen corresponding path program 16 times [2018-10-21 12:39:43,646 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:39:43,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:43,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:39:43,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:39:43,649 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:39:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:39:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17095 backedges. 17077 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-21 12:39:49,441 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:39:49,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2018-10-21 12:39:49,441 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:39:49,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-21 12:39:49,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-21 12:39:49,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5257, Invalid=5663, Unknown=0, NotChecked=0, Total=10920 [2018-10-21 12:39:49,446 INFO L87 Difference]: Start difference. First operand 364 states and 374 transitions. Second operand 105 states. [2018-10-21 12:39:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:39:52,257 INFO L93 Difference]: Finished difference Result 14899 states and 15359 transitions. [2018-10-21 12:39:52,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-21 12:39:52,257 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 363 [2018-10-21 12:39:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:39:52,259 INFO L225 Difference]: With dead ends: 14899 [2018-10-21 12:39:52,259 INFO L226 Difference]: Without dead ends: 0 [2018-10-21 12:39:52,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2018-10-21 12:39:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-21 12:39:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-21 12:39:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-21 12:39:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-21 12:39:52,286 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 363 [2018-10-21 12:39:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:39:52,286 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-21 12:39:52,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-21 12:39:52,286 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-21 12:39:52,287 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-21 12:39:52,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-21 12:39:54,547 WARN L179 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-21 12:40:00,957 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:00,977 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:00,984 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:00,997 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,012 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,115 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,145 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,195 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,353 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,452 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,517 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,561 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,586 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,622 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,752 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,762 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,893 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,905 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:01,922 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,054 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,205 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,229 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,248 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,255 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,263 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,462 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,554 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,572 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,650 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,902 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:02,919 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:03,269 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:03,319 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:03,770 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:03,881 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:03,936 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:04,013 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:04,105 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:04,147 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:04,190 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:04,453 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:04,740 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:04,949 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:05,031 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:05,221 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:05,315 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:05,594 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:05,626 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:05,887 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:06,199 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:06,281 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:06,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:06,638 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:06,739 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,039 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,200 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,226 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,246 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,410 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,473 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,538 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,571 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,582 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,647 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,826 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,846 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:07,976 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:08,022 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:08,042 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:08,567 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:08,620 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:08,636 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:08,826 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:08,834 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:08,850 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:09,087 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:09,138 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:09,321 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:09,346 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:09,410 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:09,720 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:09,940 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:10,324 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:10,341 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:10,358 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:10,426 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:10,612 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:10,755 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:10,897 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:11,057 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:11,415 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:11,634 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:11,741 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:11,803 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:11,909 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:11,963 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:12,284 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:12,322 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:12,616 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:12,627 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:12,936 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:12,981 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:13,208 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:13,557 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:13,589 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:14,159 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:15,845 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:16,463 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:16,486 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:16,588 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:17,050 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:17,289 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:17,426 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:17,631 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:17,989 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:18,203 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:18,846 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:19,299 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:19,821 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:21,220 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:21,272 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:22,022 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:22,398 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:22,424 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:22,902 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:23,566 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:24,528 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:26,085 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:26,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:28,352 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:29,541 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:34,426 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:34,776 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:38,442 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:39,175 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:41,368 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:41,792 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:44,280 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:47,934 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:48,745 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:49,597 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:53,869 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:40:56,624 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-21 12:41:01,727 WARN L179 SmtUtils]: Spent 1.12 m on a formula simplification. DAG size of input: 5154 DAG size of output: 1799 [2018-10-21 12:41:08,751 WARN L179 SmtUtils]: Spent 7.00 s on a formula simplification. DAG size of input: 664 DAG size of output: 59 [2018-10-21 12:42:09,240 WARN L179 SmtUtils]: Spent 1.01 m on a formula simplification. DAG size of input: 1775 DAG size of output: 363 [2018-10-21 12:42:09,244 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-21 12:42:09,244 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:42:09,244 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:42:09,244 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-21 12:42:09,244 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-21 12:42:09,244 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-21 12:42:09,244 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 24) no Hoare annotation was computed. [2018-10-21 12:42:09,244 INFO L425 ceAbstractionStarter]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2018-10-21 12:42:09,244 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-10-21 12:42:09,244 INFO L425 ceAbstractionStarter]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2018-10-21 12:42:09,245 INFO L421 ceAbstractionStarter]: At program point L17-4(lines 17 21) the Hoare annotation is: (let ((.cse0 (<= 10 main_~m~0)) (.cse1 (<= 10 main_~n~0))) (or (and (<= 30 main_~k~0) (<= main_~i~0 3) .cse0 .cse1) (and .cse0 (<= 100 main_~k~0) .cse1) (and .cse0 (<= 40 main_~k~0) (<= main_~i~0 4) .cse1) (and .cse0 (<= 0 main_~k~0) (<= main_~i~0 0) .cse1) (and .cse0 (<= 60 main_~k~0) (<= main_~i~0 6) .cse1) (and .cse0 (<= 10 main_~k~0) (<= main_~i~0 1) .cse1) (and (<= 80 main_~k~0) .cse0 (<= main_~i~0 8) .cse1) (and (<= 50 main_~k~0) .cse0 (<= main_~i~0 5) .cse1) (and .cse0 (<= main_~i~0 9) .cse1 (<= 90 main_~k~0)) (and (<= 70 main_~k~0) .cse0 (<= main_~i~0 7) .cse1) (and .cse0 (<= 20 main_~k~0) (<= main_~i~0 2) .cse1))) [2018-10-21 12:42:09,245 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 24) no Hoare annotation was computed. [2018-10-21 12:42:09,245 INFO L421 ceAbstractionStarter]: At program point L17-5(lines 17 21) the Hoare annotation is: (and (<= 10 main_~m~0) (<= 100 main_~k~0) (<= 10 main_~n~0)) [2018-10-21 12:42:09,245 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 24) the Hoare annotation is: true [2018-10-21 12:42:09,245 INFO L425 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-10-21 12:42:09,245 INFO L425 ceAbstractionStarter]: For program point L18-1(lines 18 20) no Hoare annotation was computed. [2018-10-21 12:42:09,245 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-10-21 12:42:09,246 INFO L425 ceAbstractionStarter]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2018-10-21 12:42:09,247 INFO L421 ceAbstractionStarter]: At program point L18-4(lines 18 20) the Hoare annotation is: (let ((.cse4 (<= main_~j~0 5)) (.cse0 (<= 10 main_~m~0)) (.cse32 (<= main_~j~0 6))) (let ((.cse14 (<= main_~j~0 8)) (.cse21 (<= main_~j~0 2)) (.cse25 (<= main_~j~0 3)) (.cse2 (<= main_~j~0 9)) (.cse38 (<= main_~j~0 1)) (.cse18 (<= main_~j~0 4)) (.cse11 (<= main_~j~0 0)) (.cse40 (and .cse0 .cse32)) (.cse36 (and .cse4 .cse0)) (.cse3 (<= 10 main_~n~0))) (let ((.cse30 (<= 80 main_~k~0)) (.cse22 (<= 70 main_~k~0)) (.cse28 (and .cse36 .cse3)) (.cse16 (and .cse40 .cse3)) (.cse27 (<= 60 main_~k~0)) (.cse31 (and .cse0 .cse11)) (.cse37 (<= 20 main_~k~0)) (.cse29 (and .cse0 .cse18)) (.cse23 (<= main_~i~0 5)) (.cse13 (and .cse0 .cse38 .cse3)) (.cse12 (<= main_~i~0 8)) (.cse39 (<= 90 main_~k~0)) (.cse9 (<= 10 main_~k~0)) (.cse35 (<= 50 main_~k~0)) (.cse17 (<= main_~i~0 7)) (.cse26 (and .cse0 .cse2)) (.cse33 (and .cse0 .cse25 .cse3)) (.cse34 (<= 30 main_~k~0)) (.cse19 (<= main_~i~0 0)) (.cse20 (<= main_~i~0 3)) (.cse5 (and .cse0 .cse21 .cse3)) (.cse10 (<= main_~i~0 1)) (.cse1 (<= main_~i~0 2)) (.cse8 (<= main_~j~0 7)) (.cse24 (and .cse14 .cse0)) (.cse6 (<= main_~i~0 6)) (.cse7 (<= (+ main_~i~0 1) main_~n~0)) (.cse41 (<= 40 main_~k~0)) (.cse15 (<= main_~i~0 4))) (or (and .cse0 (<= 29 main_~k~0) .cse1 .cse2 .cse3) (and .cse4 .cse0 (<= 25 main_~k~0) .cse1 .cse3) (and (<= 62 main_~k~0) .cse5 .cse6) (and (and .cse7 .cse0 .cse8 .cse3) (<= 97 main_~k~0)) (and .cse0 .cse9 .cse10 .cse11 .cse3) (and (<= 81 main_~k~0) .cse12 .cse13) (and .cse5 (<= 82 main_~k~0) .cse12) (and .cse14 .cse0 .cse15 (<= 48 main_~k~0) .cse3) (and .cse16 .cse17 (<= 76 main_~k~0)) (and .cse0 .cse15 .cse18 (<= 44 main_~k~0) .cse3) (and .cse0 (<= 7 main_~k~0) .cse8 .cse19 .cse3) (and .cse4 .cse0 (<= 45 main_~k~0) .cse15 .cse3) (and .cse20 .cse0 .cse21 (<= 32 main_~k~0) .cse3) (and .cse22 .cse0 .cse6 .cse3) (and (<= 2 main_~k~0) .cse0 .cse21 .cse19 .cse3) (and .cse23 .cse13 (<= 51 main_~k~0)) (and (<= 58 main_~k~0) .cse23 .cse3 .cse24) (and .cse0 .cse25 .cse15 (<= 43 main_~k~0) .cse3) (and (<= 89 main_~k~0) .cse26 .cse12 .cse3) (and (<= 66 main_~k~0) .cse16 .cse6) (and .cse0 .cse27 .cse23 .cse3) (and (<= 95 main_~k~0) (and .cse7 .cse28)) (and .cse0 .cse10 (<= 17 main_~k~0) .cse8 .cse3) (and (<= 33 main_~k~0) .cse20 .cse0 .cse25 .cse3) (and .cse29 (<= 74 main_~k~0) .cse17 .cse3) (and .cse30 .cse31 .cse12 .cse3) (and .cse0 .cse1 .cse18 .cse3 (<= 24 main_~k~0)) (and .cse14 .cse0 (<= 8 main_~k~0) .cse19 .cse3) (and (<= 23 main_~k~0) .cse0 .cse25 .cse1 .cse3) (and .cse0 .cse15 .cse2 (<= 49 main_~k~0) .cse3) (and (<= 86 main_~k~0) .cse16 .cse12) (and .cse5 .cse17 (<= 72 main_~k~0)) (and .cse12 .cse3 .cse24 (<= 88 main_~k~0)) (and .cse0 (<= 26 main_~k~0) .cse1 .cse3 .cse32) (and (and .cse29 .cse7 .cse3) (<= 94 main_~k~0)) (and .cse13 .cse15 (<= 41 main_~k~0)) (and .cse33 .cse17 (<= 73 main_~k~0)) (and .cse0 .cse25 (<= 3 main_~k~0) .cse19 .cse3) (and .cse34 .cse0 .cse1 .cse3) (and .cse30 .cse0 .cse17 .cse3) (and .cse0 .cse18 .cse19 (<= 4 main_~k~0) .cse3) (and .cse26 .cse17 (<= 79 main_~k~0) .cse3) (and (<= 37 main_~k~0) .cse20 .cse0 .cse8 .cse3) (and .cse0 .cse23 .cse8 .cse3 (<= 57 main_~k~0)) (and (<= 93 main_~k~0) (and .cse7 .cse33)) (and .cse20 .cse0 (<= 36 main_~k~0) .cse3 .cse32) (and (<= 64 main_~k~0) .cse29 .cse6 .cse3) (and .cse35 .cse23 .cse3 .cse31) (and .cse22 .cse31 .cse17 .cse3) (and .cse0 .cse15 (<= 46 main_~k~0) .cse3 .cse32) (and (<= 85 main_~k~0) .cse12 .cse28) (and (<= 16 main_~k~0) .cse0 .cse10 .cse3 .cse32) (and (<= 59 main_~k~0) .cse23 .cse26 .cse3) (and .cse0 (<= 0 main_~k~0) .cse11 .cse19 .cse3) (and (<= 75 main_~k~0) .cse36 .cse17 .cse3) (and .cse20 .cse0 .cse18 (<= 34 main_~k~0) .cse3) (and .cse0 .cse10 .cse21 (<= 12 main_~k~0) .cse3) (and (<= 96 main_~k~0) (and .cse7 .cse16)) (and .cse0 .cse37 .cse1 .cse11 .cse3) (and .cse6 .cse13 (<= 61 main_~k~0)) (and (<= 54 main_~k~0) .cse0 .cse23 .cse18 .cse3) (and (<= 91 main_~k~0) (and .cse7 .cse13)) (and .cse14 (<= 28 main_~k~0) .cse0 .cse1 .cse3) (and .cse0 (<= 6 main_~k~0) .cse19 .cse3 .cse32) (and .cse20 .cse4 .cse0 (<= 35 main_~k~0) .cse3) (and .cse23 (<= 52 main_~k~0) .cse5) (and .cse0 .cse10 .cse2 .cse3 (<= 19 main_~k~0)) (and .cse4 .cse0 (<= 15 main_~k~0) .cse10 .cse3) (and (<= 53 main_~k~0) .cse0 .cse25 .cse23 .cse3) (and .cse0 (<= 9 main_~k~0) .cse2 .cse19 .cse3) (and (<= 21 main_~k~0) .cse0 .cse38 .cse1 .cse3) (and .cse27 .cse6 .cse3 .cse31) (and .cse20 .cse0 (<= 39 main_~k~0) .cse2 .cse3) (and (and .cse7 .cse31 .cse3) .cse39) (and (<= 83 main_~k~0) .cse33 .cse12) (and .cse0 .cse12 .cse8 (<= 87 main_~k~0) .cse3) (and .cse0 .cse25 .cse10 (<= 13 main_~k~0) .cse3) (and .cse0 .cse37 .cse10 .cse3) (and .cse0 .cse15 (<= 47 main_~k~0) .cse8 .cse3) (and (<= 69 main_~k~0) .cse26 .cse6 .cse3) (and .cse36 (<= 55 main_~k~0) .cse23 .cse3) (and .cse29 (<= 84 main_~k~0) .cse12 .cse3) (and (<= 56 main_~k~0) .cse23 .cse40 .cse3) (and .cse0 .cse15 .cse21 (<= 42 main_~k~0) .cse3) (and (<= 67 main_~k~0) .cse0 .cse8 .cse6 .cse3) (and (<= 71 main_~k~0) .cse13 .cse17) (and .cse0 .cse12 .cse3 .cse39) (and .cse20 .cse0 .cse41 .cse3) (and .cse14 .cse0 (<= 18 main_~k~0) .cse10 .cse3) (and .cse0 .cse9 .cse19 .cse3) (and .cse0 .cse8 .cse17 (<= 77 main_~k~0) .cse3) (and .cse35 .cse0 .cse15 .cse3) (and (<= 78 main_~k~0) .cse17 .cse3 .cse24) (and (<= 99 main_~k~0) (and .cse7 .cse26 .cse3)) (and .cse0 .cse38 .cse19 .cse3 (<= 1 main_~k~0)) (and .cse20 .cse0 .cse38 .cse3 (<= 31 main_~k~0)) (and .cse0 (<= 22 main_~k~0) .cse1 .cse21 .cse3) (and .cse33 (<= 63 main_~k~0) .cse6) (and (<= 68 main_~k~0) .cse6 .cse3 .cse24) (and (<= 11 main_~k~0) .cse0 .cse38 .cse10 .cse3) (and .cse34 .cse20 .cse0 .cse11 .cse3) (and .cse4 .cse0 (<= 5 main_~k~0) .cse19 .cse3) (and .cse20 .cse14 .cse0 (<= 38 main_~k~0) .cse3) (and (and .cse5 .cse7) (<= 92 main_~k~0)) (and (<= 14 main_~k~0) .cse0 .cse10 .cse18 .cse3) (and .cse0 .cse1 .cse8 .cse3 (<= 27 main_~k~0)) (and (and .cse7 .cse3 .cse24) (<= 98 main_~k~0)) (and .cse36 (<= 65 main_~k~0) .cse6 .cse3) (and (and .cse7 .cse0 .cse3) (<= 100 main_~k~0)) (and .cse0 .cse41 .cse15 .cse11 .cse3))))) [2018-10-21 12:42:09,247 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-21 12:42:09,248 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-21 12:42:09,248 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:42:09,248 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-21 12:42:09,248 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-21 12:42:09,248 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:42:09,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 12:42:09 BoogieIcfgContainer [2018-10-21 12:42:09,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-21 12:42:09,287 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-21 12:42:09,287 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-21 12:42:09,287 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-21 12:42:09,288 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:39:15" (3/4) ... [2018-10-21 12:42:09,293 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-21 12:42:09,300 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-21 12:42:09,301 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-21 12:42:09,301 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-21 12:42:09,306 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2018-10-21 12:42:09,307 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-10-21 12:42:09,307 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-21 12:42:09,361 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-21 12:42:09,361 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-21 12:42:09,362 INFO L168 Benchmark]: Toolchain (without parser) took 174933.69 ms. Allocated memory was 1.0 GB in the beginning and 4.8 GB in the end (delta: 3.8 GB). Free memory was 954.5 MB in the beginning and 906.1 MB in the end (delta: 48.5 MB). Peak memory consumption was 3.8 GB. Max. memory is 11.5 GB. [2018-10-21 12:42:09,364 INFO L168 Benchmark]: CDTParser took 0.70 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. [2018-10-21 12:42:09,364 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.16 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 943.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-21 12:42:09,365 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.76 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:42:09,365 INFO L168 Benchmark]: Boogie Preprocessor took 20.97 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:42:09,367 INFO L168 Benchmark]: RCFGBuilder took 652.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 78.1 MB). Free memory was 943.8 MB in the beginning and 1.1 GB in the end (delta: -112.8 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. [2018-10-21 12:42:09,368 INFO L168 Benchmark]: TraceAbstraction took 173885.43 ms. Allocated memory was 1.1 GB in the beginning and 4.8 GB in the end (delta: 3.7 GB). Free memory was 1.1 GB in the beginning and 906.1 MB in the end (delta: 150.5 MB). Peak memory consumption was 4.1 GB. Max. memory is 11.5 GB. [2018-10-21 12:42:09,369 INFO L168 Benchmark]: Witness Printer took 73.90 ms. Allocated memory is still 4.8 GB. Free memory is still 906.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:42:09,373 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 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 276.16 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 943.8 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 17.76 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.97 ms. Allocated memory is still 1.0 GB. Free memory is still 943.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 652.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 78.1 MB). Free memory was 943.8 MB in the beginning and 1.1 GB in the end (delta: -112.8 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 173885.43 ms. Allocated memory was 1.1 GB in the beginning and 4.8 GB in the end (delta: 3.7 GB). Free memory was 1.1 GB in the beginning and 906.1 MB in the end (delta: 150.5 MB). Peak memory consumption was 4.1 GB. Max. memory is 11.5 GB. * Witness Printer took 73.90 ms. Allocated memory is still 4.8 GB. Free memory is still 906.1 MB. There was no memory consumed. 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: 17]: Loop Invariant Derived loop invariant: ((((((((((((30 <= k && i <= 3) && 10 <= m) && 10 <= n) || ((10 <= m && 100 <= k) && 10 <= n)) || (((10 <= m && 40 <= k) && i <= 4) && 10 <= n)) || (((10 <= m && 0 <= k) && i <= 0) && 10 <= n)) || (((10 <= m && 60 <= k) && i <= 6) && 10 <= n)) || (((10 <= m && 10 <= k) && i <= 1) && 10 <= n)) || (((80 <= k && 10 <= m) && i <= 8) && 10 <= n)) || (((50 <= k && 10 <= m) && i <= 5) && 10 <= n)) || (((10 <= m && i <= 9) && 10 <= n) && 90 <= k)) || (((70 <= k && 10 <= m) && i <= 7) && 10 <= n)) || (((10 <= m && 20 <= k) && i <= 2) && 10 <= n) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((10 <= m && 29 <= k) && i <= 2) && j <= 9) && 10 <= n) || ((((j <= 5 && 10 <= m) && 25 <= k) && i <= 2) && 10 <= n)) || ((62 <= k && (10 <= m && j <= 2) && 10 <= n) && i <= 6)) || ((((i + 1 <= n && 10 <= m) && j <= 7) && 10 <= n) && 97 <= k)) || ((((10 <= m && 10 <= k) && i <= 1) && j <= 0) && 10 <= n)) || ((81 <= k && i <= 8) && (10 <= m && j <= 1) && 10 <= n)) || ((((10 <= m && j <= 2) && 10 <= n) && 82 <= k) && i <= 8)) || ((((j <= 8 && 10 <= m) && i <= 4) && 48 <= k) && 10 <= n)) || ((((10 <= m && j <= 6) && 10 <= n) && i <= 7) && 76 <= k)) || ((((10 <= m && i <= 4) && j <= 4) && 44 <= k) && 10 <= n)) || ((((10 <= m && 7 <= k) && j <= 7) && i <= 0) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 45 <= k) && i <= 4) && 10 <= n)) || ((((i <= 3 && 10 <= m) && j <= 2) && 32 <= k) && 10 <= n)) || (((70 <= k && 10 <= m) && i <= 6) && 10 <= n)) || ((((2 <= k && 10 <= m) && j <= 2) && i <= 0) && 10 <= n)) || ((i <= 5 && (10 <= m && j <= 1) && 10 <= n) && 51 <= k)) || (((58 <= k && i <= 5) && 10 <= n) && j <= 8 && 10 <= m)) || ((((10 <= m && j <= 3) && i <= 4) && 43 <= k) && 10 <= n)) || (((89 <= k && 10 <= m && j <= 9) && i <= 8) && 10 <= n)) || ((66 <= k && (10 <= m && j <= 6) && 10 <= n) && i <= 6)) || (((10 <= m && 60 <= k) && i <= 5) && 10 <= n)) || (95 <= k && i + 1 <= n && (j <= 5 && 10 <= m) && 10 <= n)) || ((((10 <= m && i <= 1) && 17 <= k) && j <= 7) && 10 <= n)) || ((((33 <= k && i <= 3) && 10 <= m) && j <= 3) && 10 <= n)) || ((((10 <= m && j <= 4) && 74 <= k) && i <= 7) && 10 <= n)) || (((80 <= k && 10 <= m && j <= 0) && i <= 8) && 10 <= n)) || ((((10 <= m && i <= 2) && j <= 4) && 10 <= n) && 24 <= k)) || ((((j <= 8 && 10 <= m) && 8 <= k) && i <= 0) && 10 <= n)) || ((((23 <= k && 10 <= m) && j <= 3) && i <= 2) && 10 <= n)) || ((((10 <= m && i <= 4) && j <= 9) && 49 <= k) && 10 <= n)) || ((86 <= k && (10 <= m && j <= 6) && 10 <= n) && i <= 8)) || ((((10 <= m && j <= 2) && 10 <= n) && i <= 7) && 72 <= k)) || (((i <= 8 && 10 <= n) && j <= 8 && 10 <= m) && 88 <= k)) || ((((10 <= m && 26 <= k) && i <= 2) && 10 <= n) && j <= 6)) || ((((10 <= m && j <= 4) && i + 1 <= n) && 10 <= n) && 94 <= k)) || ((((10 <= m && j <= 1) && 10 <= n) && i <= 4) && 41 <= k)) || ((((10 <= m && j <= 3) && 10 <= n) && i <= 7) && 73 <= k)) || ((((10 <= m && j <= 3) && 3 <= k) && i <= 0) && 10 <= n)) || (((30 <= k && 10 <= m) && i <= 2) && 10 <= n)) || (((80 <= k && 10 <= m) && i <= 7) && 10 <= n)) || ((((10 <= m && j <= 4) && i <= 0) && 4 <= k) && 10 <= n)) || ((((10 <= m && j <= 9) && i <= 7) && 79 <= k) && 10 <= n)) || ((((37 <= k && i <= 3) && 10 <= m) && j <= 7) && 10 <= n)) || ((((10 <= m && i <= 5) && j <= 7) && 10 <= n) && 57 <= k)) || (93 <= k && i + 1 <= n && (10 <= m && j <= 3) && 10 <= n)) || ((((i <= 3 && 10 <= m) && 36 <= k) && 10 <= n) && j <= 6)) || (((64 <= k && 10 <= m && j <= 4) && i <= 6) && 10 <= n)) || (((50 <= k && i <= 5) && 10 <= n) && 10 <= m && j <= 0)) || (((70 <= k && 10 <= m && j <= 0) && i <= 7) && 10 <= n)) || ((((10 <= m && i <= 4) && 46 <= k) && 10 <= n) && j <= 6)) || ((85 <= k && i <= 8) && (j <= 5 && 10 <= m) && 10 <= n)) || ((((16 <= k && 10 <= m) && i <= 1) && 10 <= n) && j <= 6)) || (((59 <= k && i <= 5) && 10 <= m && j <= 9) && 10 <= n)) || ((((10 <= m && 0 <= k) && j <= 0) && i <= 0) && 10 <= n)) || (((75 <= k && j <= 5 && 10 <= m) && i <= 7) && 10 <= n)) || ((((i <= 3 && 10 <= m) && j <= 4) && 34 <= k) && 10 <= n)) || ((((10 <= m && i <= 1) && j <= 2) && 12 <= k) && 10 <= n)) || (96 <= k && i + 1 <= n && (10 <= m && j <= 6) && 10 <= n)) || ((((10 <= m && 20 <= k) && i <= 2) && j <= 0) && 10 <= n)) || ((i <= 6 && (10 <= m && j <= 1) && 10 <= n) && 61 <= k)) || ((((54 <= k && 10 <= m) && i <= 5) && j <= 4) && 10 <= n)) || (91 <= k && i + 1 <= n && (10 <= m && j <= 1) && 10 <= n)) || ((((j <= 8 && 28 <= k) && 10 <= m) && i <= 2) && 10 <= n)) || ((((10 <= m && 6 <= k) && i <= 0) && 10 <= n) && j <= 6)) || ((((i <= 3 && j <= 5) && 10 <= m) && 35 <= k) && 10 <= n)) || ((i <= 5 && 52 <= k) && (10 <= m && j <= 2) && 10 <= n)) || ((((10 <= m && i <= 1) && j <= 9) && 10 <= n) && 19 <= k)) || ((((j <= 5 && 10 <= m) && 15 <= k) && i <= 1) && 10 <= n)) || ((((53 <= k && 10 <= m) && j <= 3) && i <= 5) && 10 <= n)) || ((((10 <= m && 9 <= k) && j <= 9) && i <= 0) && 10 <= n)) || ((((21 <= k && 10 <= m) && j <= 1) && i <= 2) && 10 <= n)) || (((60 <= k && i <= 6) && 10 <= n) && 10 <= m && j <= 0)) || ((((i <= 3 && 10 <= m) && 39 <= k) && j <= 9) && 10 <= n)) || (((i + 1 <= n && 10 <= m && j <= 0) && 10 <= n) && 90 <= k)) || ((83 <= k && (10 <= m && j <= 3) && 10 <= n) && i <= 8)) || ((((10 <= m && i <= 8) && j <= 7) && 87 <= k) && 10 <= n)) || ((((10 <= m && j <= 3) && i <= 1) && 13 <= k) && 10 <= n)) || (((10 <= m && 20 <= k) && i <= 1) && 10 <= n)) || ((((10 <= m && i <= 4) && 47 <= k) && j <= 7) && 10 <= n)) || (((69 <= k && 10 <= m && j <= 9) && i <= 6) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 55 <= k) && i <= 5) && 10 <= n)) || ((((10 <= m && j <= 4) && 84 <= k) && i <= 8) && 10 <= n)) || (((56 <= k && i <= 5) && 10 <= m && j <= 6) && 10 <= n)) || ((((10 <= m && i <= 4) && j <= 2) && 42 <= k) && 10 <= n)) || ((((67 <= k && 10 <= m) && j <= 7) && i <= 6) && 10 <= n)) || ((71 <= k && (10 <= m && j <= 1) && 10 <= n) && i <= 7)) || (((10 <= m && i <= 8) && 10 <= n) && 90 <= k)) || (((i <= 3 && 10 <= m) && 40 <= k) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 18 <= k) && i <= 1) && 10 <= n)) || (((10 <= m && 10 <= k) && i <= 0) && 10 <= n)) || ((((10 <= m && j <= 7) && i <= 7) && 77 <= k) && 10 <= n)) || (((50 <= k && 10 <= m) && i <= 4) && 10 <= n)) || (((78 <= k && i <= 7) && 10 <= n) && j <= 8 && 10 <= m)) || (99 <= k && (i + 1 <= n && 10 <= m && j <= 9) && 10 <= n)) || ((((10 <= m && j <= 1) && i <= 0) && 10 <= n) && 1 <= k)) || ((((i <= 3 && 10 <= m) && j <= 1) && 10 <= n) && 31 <= k)) || ((((10 <= m && 22 <= k) && i <= 2) && j <= 2) && 10 <= n)) || ((((10 <= m && j <= 3) && 10 <= n) && 63 <= k) && i <= 6)) || (((68 <= k && i <= 6) && 10 <= n) && j <= 8 && 10 <= m)) || ((((11 <= k && 10 <= m) && j <= 1) && i <= 1) && 10 <= n)) || ((((30 <= k && i <= 3) && 10 <= m) && j <= 0) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 5 <= k) && i <= 0) && 10 <= n)) || ((((i <= 3 && j <= 8) && 10 <= m) && 38 <= k) && 10 <= n)) || ((((10 <= m && j <= 2) && 10 <= n) && i + 1 <= n) && 92 <= k)) || ((((14 <= k && 10 <= m) && i <= 1) && j <= 4) && 10 <= n)) || ((((10 <= m && i <= 2) && j <= 7) && 10 <= n) && 27 <= k)) || (((i + 1 <= n && 10 <= n) && j <= 8 && 10 <= m) && 98 <= k)) || ((((j <= 5 && 10 <= m) && 65 <= k) && i <= 6) && 10 <= n)) || (((i + 1 <= n && 10 <= m) && 10 <= n) && 100 <= k)) || ((((10 <= m && 40 <= k) && i <= 4) && j <= 0) && 10 <= n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. SAFE Result, 173.7s OverallTime, 19 OverallIterations, 110 TraceHistogramMax, 8.2s AutomataDifference, 0.0s DeadEndRemovalTime, 136.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 867 SDtfs, 1725 SDslu, 3360 SDs, 0 SdLazy, 1186 SolverSat, 324 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8846 GetRequests, 8284 SyntacticMatches, 116 SemanticMatches, 446 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 17.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=364occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 285 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 26 PreInvPairs, 5143 NumberOfFragments, 1970 HoareAnnotationTreeSize, 26 FomulaSimplifications, 6246897 FormulaSimplificationTreeSizeReduction, 69.4s HoareSimplificationTime, 8 FomulaSimplificationsInter, 72380 FormulaSimplificationTreeSizeReductionInter, 67.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 5.4s SatisfiabilityAnalysisTime, 19.2s InterpolantComputationTime, 6811 NumberOfCodeBlocks, 6515 NumberOfCodeBlocksAsserted, 421 NumberOfCheckSat, 11002 ConstructedInterpolants, 0 QuantifiedInterpolants, 11555734 SizeOfPredicates, 86 NumberOfNonLiveVariables, 8030 ConjunctsInSsa, 248 ConjunctsInUnsatCore, 79 InterpolantComputations, 4 PerfectInterpolantSequences, 75784/281762 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...