./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 8c3fbe1c 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 0.1.23-8c3fbe1 [2018-10-22 15:11:40,659 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:11:40,661 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:11:40,678 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:11:40,679 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:11:40,681 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:11:40,683 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:11:40,685 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:11:40,687 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:11:40,688 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:11:40,689 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:11:40,689 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:11:40,691 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:11:40,692 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:11:40,696 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:11:40,697 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:11:40,698 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:11:40,706 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:11:40,708 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:11:40,712 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:11:40,713 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:11:40,717 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:11:40,721 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 15:11:40,722 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 15:11:40,726 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 15:11:40,727 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 15:11:40,728 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 15:11:40,730 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 15:11:40,733 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 15:11:40,734 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 15:11:40,734 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 15:11:40,735 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 15:11:40,735 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 15:11:40,735 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 15:11:40,736 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 15:11:40,737 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 15:11:40,737 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 15:11:40,758 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:11:40,759 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:11:40,760 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:11:40,760 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 15:11:40,761 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 15:11:40,761 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 15:11:40,761 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 15:11:40,761 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 15:11:40,761 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 15:11:40,761 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 15:11:40,762 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 15:11:40,763 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:11:40,763 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 15:11:40,764 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:11:40,764 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 15:11:40,764 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:11:40,764 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:11:40,764 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:11:40,764 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:11:40,765 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 15:11:40,768 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:11:40,768 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:11:40,768 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:11:40,768 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:11:40,768 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:11:40,769 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:11:40,769 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:11:40,769 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:11:40,769 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:11:40,769 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:11:40,769 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 15:11:40,770 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:11:40,771 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:11:40,772 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:11:40,772 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 [2018-10-22 15:11:40,830 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:11:40,843 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:11:40,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:11:40,848 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:11:40,849 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:11:40,850 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-22 15:11:40,904 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/aa94afbb8/e68b17ac776949abb561facf6b489df8/FLAG9de58cf89 [2018-10-22 15:11:41,338 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:11:41,339 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-22 15:11:41,347 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/aa94afbb8/e68b17ac776949abb561facf6b489df8/FLAG9de58cf89 [2018-10-22 15:11:41,365 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/aa94afbb8/e68b17ac776949abb561facf6b489df8 [2018-10-22 15:11:41,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:11:41,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 15:11:41,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:11:41,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:11:41,378 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:11:41,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:11:41" (1/1) ... [2018-10-22 15:11:41,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434e2571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41, skipping insertion in model container [2018-10-22 15:11:41,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:11:41" (1/1) ... [2018-10-22 15:11:41,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:11:41,424 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:11:41,613 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:11:41,618 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:11:41,642 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:11:41,665 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:11:41,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41 WrapperNode [2018-10-22 15:11:41,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:11:41,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:11:41,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:11:41,667 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:11:41,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41" (1/1) ... [2018-10-22 15:11:41,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41" (1/1) ... [2018-10-22 15:11:41,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:11:41,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:11:41,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:11:41,691 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:11:41,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41" (1/1) ... [2018-10-22 15:11:41,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41" (1/1) ... [2018-10-22 15:11:41,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41" (1/1) ... [2018-10-22 15:11:41,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41" (1/1) ... [2018-10-22 15:11:41,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41" (1/1) ... [2018-10-22 15:11:41,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41" (1/1) ... [2018-10-22 15:11:41,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41" (1/1) ... [2018-10-22 15:11:41,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:11:41,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:11:41,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:11:41,717 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:11:41,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:11:41,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 15:11:41,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 15:11:41,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:11:41,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:11:41,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 15:11:41,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 15:11:41,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:11:41,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:11:42,256 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:11:42,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:11:42 BoogieIcfgContainer [2018-10-22 15:11:42,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:11:42,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:11:42,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:11:42,261 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:11:42,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:11:41" (1/3) ... [2018-10-22 15:11:42,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a66951b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:11:42, skipping insertion in model container [2018-10-22 15:11:42,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:41" (2/3) ... [2018-10-22 15:11:42,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a66951b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:11:42, skipping insertion in model container [2018-10-22 15:11:42,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:11:42" (3/3) ... [2018-10-22 15:11:42,265 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call_true-termination.i [2018-10-22 15:11:42,275 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:11:42,282 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:11:42,299 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:11:42,340 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:11:42,341 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:11:42,341 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:11:42,341 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:11:42,341 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:11:42,341 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:11:42,341 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:11:42,342 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:11:42,343 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:11:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-10-22 15:11:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 15:11:42,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:42,380 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:42,382 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:42,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash -702630595, now seen corresponding path program 1 times [2018-10-22 15:11:42,392 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:42,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:42,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:42,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:42,440 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:42,515 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:11:42,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:11:42,515 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:11:42,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:11:42,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:11:42,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:11:42,536 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-10-22 15:11:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:42,557 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2018-10-22 15:11:42,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:11:42,559 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-22 15:11:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:42,568 INFO L225 Difference]: With dead ends: 43 [2018-10-22 15:11:42,568 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:11:42,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:11:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:11:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 15:11:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:11:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-22 15:11:42,613 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2018-10-22 15:11:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:42,613 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-22 15:11:42,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:11:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-22 15:11:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:11:42,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:42,615 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:42,615 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:42,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:42,616 INFO L82 PathProgramCache]: Analyzing trace with hash -972126638, now seen corresponding path program 1 times [2018-10-22 15:11:42,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:42,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:42,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:42,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:42,618 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:42,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:11:42,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:11:42,713 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:11:42,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:11:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:11:42,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:11:42,716 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2018-10-22 15:11:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:42,801 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-22 15:11:42,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:11:42,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-22 15:11:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:42,803 INFO L225 Difference]: With dead ends: 29 [2018-10-22 15:11:42,803 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 15:11:42,805 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 [2018-10-22 15:11:42,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 15:11:42,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-10-22 15:11:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 15:11:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-22 15:11:42,814 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2018-10-22 15:11:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:42,818 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-22 15:11:42,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:11:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-22 15:11:42,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 15:11:42,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:42,820 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:42,820 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:42,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:42,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1998515670, now seen corresponding path program 1 times [2018-10-22 15:11:42,821 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:42,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:42,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:42,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:42,825 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:42,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:11:42,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:11:42,923 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:11:42,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:11:42,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:11:42,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:11:42,926 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2018-10-22 15:11:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:43,025 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-10-22 15:11:43,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:11:43,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-10-22 15:11:43,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:43,028 INFO L225 Difference]: With dead ends: 34 [2018-10-22 15:11:43,028 INFO L226 Difference]: Without dead ends: 23 [2018-10-22 15:11:43,029 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 [2018-10-22 15:11:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-22 15:11:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-10-22 15:11:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 15:11:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-22 15:11:43,034 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2018-10-22 15:11:43,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:43,035 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-22 15:11:43,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:11:43,035 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-22 15:11:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 15:11:43,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:43,036 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:43,036 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:43,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:43,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1293803971, now seen corresponding path program 1 times [2018-10-22 15:11:43,037 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:43,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:43,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:43,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:43,038 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:43,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:43,157 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:43,158 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-22 15:11:43,160 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [21], [25], [28], [30], [32], [36], [43], [46], [48], [54], [55], [56], [58] [2018-10-22 15:11:43,210 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:11:43,210 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:11:44,360 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:11:44,361 INFO L272 AbstractInterpreter]: Visited 19 different actions 599 times. Merged at 8 different actions 374 times. Widened at 3 different actions 105 times. Found 61 fixpoints after 6 different actions. Largest state had 10 variables. [2018-10-22 15:11:44,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:44,388 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:11:44,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:44,388 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:44,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:44,399 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:11:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:44,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:44,550 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:44,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:44,876 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:44,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:44,895 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:11:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:44,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:44,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:44,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:11:44,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 10 [2018-10-22 15:11:44,945 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:44,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:11:44,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:11:44,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:11:44,947 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2018-10-22 15:11:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:45,044 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-10-22 15:11:45,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:11:45,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-10-22 15:11:45,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:45,047 INFO L225 Difference]: With dead ends: 39 [2018-10-22 15:11:45,047 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:11:45,048 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 [2018-10-22 15:11:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:11:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-22 15:11:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 15:11:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-22 15:11:45,057 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2018-10-22 15:11:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:45,057 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-22 15:11:45,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:11:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-22 15:11:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-22 15:11:45,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:45,059 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:45,059 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:45,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:45,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1379909750, now seen corresponding path program 2 times [2018-10-22 15:11:45,060 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:45,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:45,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:45,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:45,063 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:45,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:45,177 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:45,177 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:45,178 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:45,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:45,178 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:45,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:11:45,193 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:11:45,227 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:11:45,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:45,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 15:11:45,427 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 15:11:45,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:45,551 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:45,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:11:45,568 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:11:45,589 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:11:45,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:45,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 15:11:45,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 15:11:45,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:11:45,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-10-22 15:11:45,624 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:45,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:11:45,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:11:45,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:11:45,625 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2018-10-22 15:11:46,066 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-22 15:11:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:46,337 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2018-10-22 15:11:46,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:11:46,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-10-22 15:11:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:46,341 INFO L225 Difference]: With dead ends: 73 [2018-10-22 15:11:46,341 INFO L226 Difference]: Without dead ends: 57 [2018-10-22 15:11:46,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:11:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-22 15:11:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2018-10-22 15:11:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-22 15:11:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-22 15:11:46,351 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 24 [2018-10-22 15:11:46,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:46,352 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-22 15:11:46,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:11:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-22 15:11:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-22 15:11:46,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:46,353 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:46,354 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:46,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1699386968, now seen corresponding path program 3 times [2018-10-22 15:11:46,354 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:46,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:46,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:46,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:46,356 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 45 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-22 15:11:46,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:46,523 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:46,523 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:46,523 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:46,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:46,525 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:46,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:11:46,544 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:11:46,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 15:11:46,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:46,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-22 15:11:46,730 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-22 15:11:46,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:46,864 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:46,880 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:11:46,880 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:11:46,918 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 15:11:46,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:46,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-22 15:11:46,935 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-22 15:11:46,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:11:46,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 6, 6] total 15 [2018-10-22 15:11:46,957 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:46,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:11:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:11:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:11:46,958 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 11 states. [2018-10-22 15:11:47,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:47,710 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2018-10-22 15:11:47,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:11:47,710 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-10-22 15:11:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:47,712 INFO L225 Difference]: With dead ends: 106 [2018-10-22 15:11:47,712 INFO L226 Difference]: Without dead ends: 84 [2018-10-22 15:11:47,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:11:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-22 15:11:47,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2018-10-22 15:11:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-22 15:11:47,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2018-10-22 15:11:47,726 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 41 [2018-10-22 15:11:47,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:47,726 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2018-10-22 15:11:47,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:11:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2018-10-22 15:11:47,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 15:11:47,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:47,728 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:47,729 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:47,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash -319190378, now seen corresponding path program 4 times [2018-10-22 15:11:47,729 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:47,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:47,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:47,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:47,732 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-22 15:11:47,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:47,946 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:47,947 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:47,947 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:47,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:47,947 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:47,960 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:11:47,960 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:11:48,002 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:11:48,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:48,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-22 15:11:48,235 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-22 15:11:48,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:48,374 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:48,390 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:11:48,390 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:11:48,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:11:48,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:48,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-22 15:11:48,452 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-22 15:11:48,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:11:48,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 19 [2018-10-22 15:11:48,488 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:48,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:11:48,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:11:48,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:11:48,491 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 13 states. [2018-10-22 15:11:48,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:48,603 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2018-10-22 15:11:48,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:11:48,605 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2018-10-22 15:11:48,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:48,608 INFO L225 Difference]: With dead ends: 119 [2018-10-22 15:11:48,608 INFO L226 Difference]: Without dead ends: 77 [2018-10-22 15:11:48,609 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 [2018-10-22 15:11:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-22 15:11:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2018-10-22 15:11:48,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-22 15:11:48,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2018-10-22 15:11:48,632 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 64 [2018-10-22 15:11:48,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:48,632 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2018-10-22 15:11:48,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:11:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2018-10-22 15:11:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-22 15:11:48,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:48,643 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 15, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:48,643 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:48,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:48,644 INFO L82 PathProgramCache]: Analyzing trace with hash 414540755, now seen corresponding path program 5 times [2018-10-22 15:11:48,644 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:48,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:48,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:48,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:48,645 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-22 15:11:48,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:48,798 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:48,798 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:48,798 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:48,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:48,799 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:48,811 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:11:48,811 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:11:48,844 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-22 15:11:48,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:48,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-22 15:11:48,939 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-22 15:11:49,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:49,049 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:49,068 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:11:49,068 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:11:49,208 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-22 15:11:49,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:49,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-22 15:11:49,242 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-22 15:11:49,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:11:49,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 20 [2018-10-22 15:11:49,653 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:49,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:11:49,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:11:49,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:11:49,657 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 15 states. [2018-10-22 15:11:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:49,925 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2018-10-22 15:11:49,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:11:49,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-10-22 15:11:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:49,928 INFO L225 Difference]: With dead ends: 134 [2018-10-22 15:11:49,928 INFO L226 Difference]: Without dead ends: 86 [2018-10-22 15:11:49,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 277 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:11:49,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-22 15:11:49,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2018-10-22 15:11:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 15:11:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2018-10-22 15:11:49,943 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 73 [2018-10-22 15:11:49,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:49,943 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2018-10-22 15:11:49,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:11:49,943 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2018-10-22 15:11:49,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:11:49,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:49,946 INFO L375 BasicCegarLoop]: trace histogram [21, 18, 18, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:49,946 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:49,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:49,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1138844106, now seen corresponding path program 6 times [2018-10-22 15:11:49,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:49,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:49,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:49,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:49,950 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 274 proven. 57 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2018-10-22 15:11:50,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:50,136 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:50,136 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:50,136 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:50,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:50,137 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:50,144 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:11:50,145 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 15:11:50,164 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 15:11:50,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:50,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-22 15:11:50,448 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-22 15:11:50,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:50,586 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:50,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:11:50,619 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 15:11:50,685 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 15:11:50,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:50,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-22 15:11:50,712 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-22 15:11:50,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:11:50,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7, 7, 7] total 20 [2018-10-22 15:11:50,756 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:50,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:11:50,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:11:50,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:11:50,757 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 15 states. [2018-10-22 15:11:51,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:51,993 INFO L93 Difference]: Finished difference Result 201 states and 214 transitions. [2018-10-22 15:11:51,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:11:51,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2018-10-22 15:11:51,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:51,996 INFO L225 Difference]: With dead ends: 201 [2018-10-22 15:11:51,996 INFO L226 Difference]: Without dead ends: 147 [2018-10-22 15:11:51,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1143, Invalid=2397, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 15:11:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-22 15:11:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2018-10-22 15:11:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-22 15:11:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2018-10-22 15:11:52,018 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 82 [2018-10-22 15:11:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:52,018 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2018-10-22 15:11:52,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:11:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2018-10-22 15:11:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-22 15:11:52,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:52,021 INFO L375 BasicCegarLoop]: trace histogram [32, 28, 28, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:52,022 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:52,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash -293632002, now seen corresponding path program 7 times [2018-10-22 15:11:52,022 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:52,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:52,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:52,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:52,023 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-22 15:11:52,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:52,189 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:52,189 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:52,189 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:52,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:52,190 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:52,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:52,198 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:11:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:52,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-22 15:11:52,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-22 15:11:52,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:52,714 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:52,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:52,728 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:11:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:52,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-22 15:11:52,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-22 15:11:52,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:11:52,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 22 [2018-10-22 15:11:52,930 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:52,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:11:52,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:11:52,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:11:52,932 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 19 states. [2018-10-22 15:11:53,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:53,039 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2018-10-22 15:11:53,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:11:53,044 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 117 [2018-10-22 15:11:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:53,046 INFO L225 Difference]: With dead ends: 220 [2018-10-22 15:11:53,046 INFO L226 Difference]: Without dead ends: 134 [2018-10-22 15:11:53,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 445 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:11:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-22 15:11:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-10-22 15:11:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-22 15:11:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2018-10-22 15:11:53,073 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 117 [2018-10-22 15:11:53,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:53,074 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2018-10-22 15:11:53,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:11:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2018-10-22 15:11:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-22 15:11:53,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:53,077 INFO L375 BasicCegarLoop]: trace histogram [36, 32, 32, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:53,078 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:53,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash -210025646, now seen corresponding path program 8 times [2018-10-22 15:11:53,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:53,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:53,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:53,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:53,081 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-22 15:11:53,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:53,261 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:53,261 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:53,261 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:53,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:53,261 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:53,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:11:53,270 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:11:53,318 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:11:53,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:53,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-22 15:11:53,490 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-22 15:11:53,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:53,657 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:53,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:11:53,673 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:11:53,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:11:53,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:53,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-22 15:11:53,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-22 15:11:53,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:11:53,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 23 [2018-10-22 15:11:53,894 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:53,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:11:53,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:11:53,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:11:53,895 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 21 states. [2018-10-22 15:11:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:54,123 INFO L93 Difference]: Finished difference Result 241 states and 252 transitions. [2018-10-22 15:11:54,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:11:54,126 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 129 [2018-10-22 15:11:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:54,127 INFO L225 Difference]: With dead ends: 241 [2018-10-22 15:11:54,127 INFO L226 Difference]: Without dead ends: 146 [2018-10-22 15:11:54,128 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 [2018-10-22 15:11:54,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-22 15:11:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2018-10-22 15:11:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-22 15:11:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2018-10-22 15:11:54,148 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 129 [2018-10-22 15:11:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:54,148 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2018-10-22 15:11:54,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:11:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2018-10-22 15:11:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-22 15:11:54,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:54,153 INFO L375 BasicCegarLoop]: trace histogram [40, 36, 36, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:54,153 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:54,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:54,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1652018178, now seen corresponding path program 9 times [2018-10-22 15:11:54,153 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:54,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:54,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:54,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:54,154 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 851 proven. 126 refuted. 0 times theorem prover too weak. 1239 trivial. 0 not checked. [2018-10-22 15:11:54,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:54,341 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:54,342 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:54,342 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:54,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:54,342 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:54,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:11:54,351 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:11:54,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-22 15:11:54,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:54,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 854 proven. 126 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-22 15:11:54,547 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 11 proven. 969 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-22 15:11:54,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:54,672 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:54,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:11:54,688 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:11:54,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-22 15:11:54,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:54,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 854 proven. 126 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-22 15:11:54,827 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 11 proven. 969 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-22 15:11:54,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:11:54,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 23 [2018-10-22 15:11:54,953 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:54,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:11:54,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:11:54,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:11:54,954 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 23 states. [2018-10-22 15:11:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:55,122 INFO L93 Difference]: Finished difference Result 262 states and 273 transitions. [2018-10-22 15:11:55,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:11:55,122 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 141 [2018-10-22 15:11:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:55,125 INFO L225 Difference]: With dead ends: 262 [2018-10-22 15:11:55,125 INFO L226 Difference]: Without dead ends: 158 [2018-10-22 15:11:55,126 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 [2018-10-22 15:11:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-22 15:11:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-10-22 15:11:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-22 15:11:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2018-10-22 15:11:55,141 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 141 [2018-10-22 15:11:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:55,142 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2018-10-22 15:11:55,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:11:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2018-10-22 15:11:55,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-22 15:11:55,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:55,145 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 40, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:55,146 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:55,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:55,147 INFO L82 PathProgramCache]: Analyzing trace with hash -969563822, now seen corresponding path program 10 times [2018-10-22 15:11:55,147 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:55,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:55,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:55,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:55,149 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-22 15:11:55,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:55,375 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:55,375 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:55,376 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:55,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:55,376 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:55,384 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:11:55,384 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:11:55,428 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:11:55,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:55,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-22 15:11:55,664 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-22 15:11:55,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:55,946 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:55,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:11:55,962 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:11:56,071 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:11:56,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:56,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-22 15:11:56,122 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-22 15:11:56,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:11:56,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 19 [2018-10-22 15:11:56,176 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:56,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:11:56,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:11:56,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:11:56,177 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 13 states. [2018-10-22 15:11:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:56,362 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2018-10-22 15:11:56,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:11:56,363 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2018-10-22 15:11:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:56,365 INFO L225 Difference]: With dead ends: 227 [2018-10-22 15:11:56,365 INFO L226 Difference]: Without dead ends: 222 [2018-10-22 15:11:56,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:11:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-22 15:11:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 189. [2018-10-22 15:11:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-22 15:11:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2018-10-22 15:11:56,385 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 153 [2018-10-22 15:11:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:56,387 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2018-10-22 15:11:56,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:11:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2018-10-22 15:11:56,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-22 15:11:56,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:56,391 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 50, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:56,391 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:56,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:56,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1779605514, now seen corresponding path program 11 times [2018-10-22 15:11:56,393 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:56,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:56,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:56,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:56,395 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-22 15:11:56,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:56,943 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:56,943 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:56,943 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:56,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:56,944 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:56,952 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:11:56,952 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:11:57,032 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-22 15:11:57,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:57,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-22 15:11:57,254 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-22 15:11:57,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:57,542 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:57,557 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:11:57,557 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:11:58,163 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-22 15:11:58,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:58,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-22 15:11:58,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-22 15:11:58,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:11:58,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 20 [2018-10-22 15:11:58,378 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:58,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:11:58,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:11:58,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:11:58,379 INFO L87 Difference]: Start difference. First operand 189 states and 194 transitions. Second operand 15 states. [2018-10-22 15:11:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:58,688 INFO L93 Difference]: Finished difference Result 262 states and 269 transitions. [2018-10-22 15:11:58,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:11:58,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 188 [2018-10-22 15:11:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:58,691 INFO L225 Difference]: With dead ends: 262 [2018-10-22 15:11:58,692 INFO L226 Difference]: Without dead ends: 257 [2018-10-22 15:11:58,693 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 [2018-10-22 15:11:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-10-22 15:11:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 224. [2018-10-22 15:11:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-22 15:11:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 230 transitions. [2018-10-22 15:11:58,713 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 230 transitions. Word has length 188 [2018-10-22 15:11:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:58,713 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 230 transitions. [2018-10-22 15:11:58,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:11:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 230 transitions. [2018-10-22 15:11:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-22 15:11:58,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:58,716 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 60, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:58,716 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:58,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash 388824786, now seen corresponding path program 12 times [2018-10-22 15:11:58,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:58,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:58,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:58,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:58,719 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-22 15:11:58,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:58,976 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:11:58,976 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:58,976 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:58,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:58,977 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:11:58,986 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:11:58,986 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 15:11:59,164 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-22 15:11:59,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:59,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-22 15:11:59,366 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-22 15:11:59,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:59,523 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:59,539 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:11:59,539 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 15:12:00,203 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-22 15:12:00,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:12:00,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:12:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-22 15:12:00,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:12:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-22 15:12:00,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:12:00,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 21 [2018-10-22 15:12:00,396 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:12:00,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:12:00,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:12:00,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:12:00,398 INFO L87 Difference]: Start difference. First operand 224 states and 230 transitions. Second operand 17 states. [2018-10-22 15:12:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:12:00,570 INFO L93 Difference]: Finished difference Result 297 states and 305 transitions. [2018-10-22 15:12:00,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:12:00,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 223 [2018-10-22 15:12:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:12:00,573 INFO L225 Difference]: With dead ends: 297 [2018-10-22 15:12:00,573 INFO L226 Difference]: Without dead ends: 292 [2018-10-22 15:12:00,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 873 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:12:00,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-22 15:12:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 259. [2018-10-22 15:12:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-22 15:12:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 266 transitions. [2018-10-22 15:12:00,596 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 266 transitions. Word has length 223 [2018-10-22 15:12:00,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:12:00,597 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 266 transitions. [2018-10-22 15:12:00,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:12:00,597 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 266 transitions. [2018-10-22 15:12:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-22 15:12:00,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:12:00,602 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 70, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:12:00,602 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:12:00,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:12:00,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1062399370, now seen corresponding path program 13 times [2018-10-22 15:12:00,602 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:12:00,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:12:00,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:12:00,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:12:00,605 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:12:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:12:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-22 15:12:01,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:12:01,523 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:12:01,523 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:12:01,524 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:12:01,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:12:01,524 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 [2018-10-22 15:12:01,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:12:01,542 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:12:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:12:01,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:12:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-22 15:12:02,075 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:12:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-22 15:12:02,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:12:02,332 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 [2018-10-22 15:12:02,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:12:02,348 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:12:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:12:02,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:12:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-22 15:12:02,658 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:12:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-22 15:12:03,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:12:03,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 22 [2018-10-22 15:12:03,577 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:12:03,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:12:03,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:12:03,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:12:03,578 INFO L87 Difference]: Start difference. First operand 259 states and 266 transitions. Second operand 19 states. [2018-10-22 15:12:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:12:03,678 INFO L93 Difference]: Finished difference Result 332 states and 341 transitions. [2018-10-22 15:12:03,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:12:03,679 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 258 [2018-10-22 15:12:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:12:03,681 INFO L225 Difference]: With dead ends: 332 [2018-10-22 15:12:03,681 INFO L226 Difference]: Without dead ends: 327 [2018-10-22 15:12:03,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 1009 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:12:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-22 15:12:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 294. [2018-10-22 15:12:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-22 15:12:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 302 transitions. [2018-10-22 15:12:03,712 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 302 transitions. Word has length 258 [2018-10-22 15:12:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:12:03,712 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 302 transitions. [2018-10-22 15:12:03,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:12:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 302 transitions. [2018-10-22 15:12:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-22 15:12:03,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:12:03,715 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 80, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:12:03,716 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:12:03,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:12:03,717 INFO L82 PathProgramCache]: Analyzing trace with hash -790873006, now seen corresponding path program 14 times [2018-10-22 15:12:03,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:12:03,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:12:03,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:12:03,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:12:03,718 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:12:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:12:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-22 15:12:04,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:12:04,097 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:12:04,097 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:12:04,097 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:12:04,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:12:04,098 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 [2018-10-22 15:12:04,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:12:04,107 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:12:04,202 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:12:04,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:12:04,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:12:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-22 15:12:04,758 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:12:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-22 15:12:04,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:12:04,968 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 [2018-10-22 15:12:04,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:12:04,984 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:12:05,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:12:05,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:12:05,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:12:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-22 15:12:05,365 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:12:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-22 15:12:05,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:12:05,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 23 [2018-10-22 15:12:05,593 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:12:05,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:12:05,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:12:05,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:12:05,595 INFO L87 Difference]: Start difference. First operand 294 states and 302 transitions. Second operand 21 states. [2018-10-22 15:12:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:12:05,713 INFO L93 Difference]: Finished difference Result 367 states and 377 transitions. [2018-10-22 15:12:05,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:12:05,714 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 293 [2018-10-22 15:12:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:12:05,716 INFO L225 Difference]: With dead ends: 367 [2018-10-22 15:12:05,716 INFO L226 Difference]: Without dead ends: 362 [2018-10-22 15:12:05,717 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 [2018-10-22 15:12:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-22 15:12:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 329. [2018-10-22 15:12:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-10-22 15:12:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 338 transitions. [2018-10-22 15:12:05,753 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 338 transitions. Word has length 293 [2018-10-22 15:12:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:12:05,753 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 338 transitions. [2018-10-22 15:12:05,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:12:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 338 transitions. [2018-10-22 15:12:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-10-22 15:12:05,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:12:05,757 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 90, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:12:05,757 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:12:05,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:12:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash 547939574, now seen corresponding path program 15 times [2018-10-22 15:12:05,757 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:12:05,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:12:05,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:12:05,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:12:05,761 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:12:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:12:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-22 15:12:06,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:12:06,209 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:12:06,209 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:12:06,209 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:12:06,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:12:06,209 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 [2018-10-22 15:12:06,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:12:06,217 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:12:06,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-22 15:12:06,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:12:06,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:12:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-22 15:12:06,846 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:12:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-22 15:12:07,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:12:07,075 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 [2018-10-22 15:12:07,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:12:07,090 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:12:08,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-22 15:12:08,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:12:08,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:12:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-22 15:12:09,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:12:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-22 15:12:09,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:12:09,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 23 [2018-10-22 15:12:09,302 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:12:09,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:12:09,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:12:09,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:12:09,304 INFO L87 Difference]: Start difference. First operand 329 states and 338 transitions. Second operand 23 states. [2018-10-22 15:12:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:12:10,096 INFO L93 Difference]: Finished difference Result 402 states and 413 transitions. [2018-10-22 15:12:10,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:12:10,098 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 328 [2018-10-22 15:12:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:12:10,101 INFO L225 Difference]: With dead ends: 402 [2018-10-22 15:12:10,101 INFO L226 Difference]: Without dead ends: 397 [2018-10-22 15:12:10,103 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 [2018-10-22 15:12:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2018-10-22 15:12:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 364. [2018-10-22 15:12:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-22 15:12:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 374 transitions. [2018-10-22 15:12:10,155 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 374 transitions. Word has length 328 [2018-10-22 15:12:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:12:10,157 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 374 transitions. [2018-10-22 15:12:10,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:12:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 374 transitions. [2018-10-22 15:12:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-22 15:12:10,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:12:10,162 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 100, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:12:10,162 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:12:10,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:12:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1390107090, now seen corresponding path program 16 times [2018-10-22 15:12:10,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:12:10,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:12:10,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:12:10,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:12:10,166 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:12:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:12:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17095 backedges. 17077 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-22 15:12:16,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:12:16,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2018-10-22 15:12:16,471 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:12:16,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-22 15:12:16,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-22 15:12:16,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5257, Invalid=5663, Unknown=0, NotChecked=0, Total=10920 [2018-10-22 15:12:16,476 INFO L87 Difference]: Start difference. First operand 364 states and 374 transitions. Second operand 105 states. [2018-10-22 15:12:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:12:19,455 INFO L93 Difference]: Finished difference Result 14899 states and 15359 transitions. [2018-10-22 15:12:19,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-22 15:12:19,456 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 363 [2018-10-22 15:12:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:12:19,458 INFO L225 Difference]: With dead ends: 14899 [2018-10-22 15:12:19,458 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 15:12:19,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 15:12:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 15:12:19,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 15:12:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 15:12:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 15:12:19,485 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 363 [2018-10-22 15:12:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:12:19,485 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 15:12:19,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-22 15:12:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 15:12:19,486 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 15:12:19,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 15:12:21,727 WARN L179 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-22 15:12:27,600 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:27,629 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:27,640 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:27,655 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:27,672 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:27,767 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:27,793 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:27,837 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:27,984 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,086 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,147 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,187 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,212 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,247 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,371 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,381 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,502 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,513 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,529 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,657 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,800 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,824 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,841 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,848 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:28,854 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:29,037 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:29,122 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:29,142 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:29,225 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:29,638 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:29,659 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:29,935 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:29,983 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:30,441 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:30,548 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:30,601 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:30,672 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:30,760 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:30,800 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:30,842 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:31,098 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:31,365 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:31,532 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:31,576 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:31,711 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:31,782 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:31,953 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:31,974 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:32,208 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:32,310 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:32,353 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:32,413 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:32,544 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:32,620 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:32,893 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,046 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,070 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,089 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,249 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,307 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,370 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,402 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,412 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,505 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,709 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,727 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,855 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,976 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:33,996 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:34,433 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:34,490 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:34,507 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:34,707 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:34,717 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:34,734 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:34,990 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:35,048 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:35,198 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:35,226 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:35,295 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:35,630 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:35,884 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:36,286 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:36,305 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:36,324 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:36,397 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:36,590 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:36,711 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:36,832 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:36,985 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:37,312 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:37,520 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:37,625 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:37,687 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:37,791 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:37,844 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:38,148 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:38,185 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:38,487 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:38,499 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:38,817 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:38,855 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:39,049 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:39,396 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:39,430 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:40,043 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:41,705 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:42,287 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:42,309 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:42,404 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:42,722 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:43,043 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:43,160 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:43,354 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:43,694 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:43,915 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:44,596 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:45,063 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:45,449 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:46,924 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:46,974 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:47,684 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:47,966 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:47,991 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:48,522 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:49,136 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:50,054 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:51,588 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:51,898 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:53,728 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:54,942 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:12:59,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:00,021 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:03,537 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:04,454 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:06,555 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:06,975 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:09,336 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:12,767 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:13,536 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:14,358 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:18,481 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:21,169 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:13:26,186 WARN L179 SmtUtils]: Spent 1.07 m on a formula simplification. DAG size of input: 5154 DAG size of output: 1799 [2018-10-22 15:13:32,781 WARN L179 SmtUtils]: Spent 6.57 s on a formula simplification. DAG size of input: 664 DAG size of output: 59 [2018-10-22 15:14:35,465 WARN L179 SmtUtils]: Spent 1.04 m on a formula simplification. DAG size of input: 1775 DAG size of output: 363 [2018-10-22 15:14:35,470 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 15:14:35,470 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:14:35,470 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:14:35,470 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 15:14:35,470 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 15:14:35,470 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 15:14:35,471 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 24) no Hoare annotation was computed. [2018-10-22 15:14:35,471 INFO L425 ceAbstractionStarter]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2018-10-22 15:14:35,471 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-10-22 15:14:35,471 INFO L425 ceAbstractionStarter]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2018-10-22 15:14:35,471 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))) [2018-10-22 15:14:35,471 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 24) no Hoare annotation was computed. [2018-10-22 15:14:35,471 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)) [2018-10-22 15:14:35,472 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 24) the Hoare annotation is: true [2018-10-22 15:14:35,472 INFO L425 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-10-22 15:14:35,472 INFO L425 ceAbstractionStarter]: For program point L18-1(lines 18 20) no Hoare annotation was computed. [2018-10-22 15:14:35,472 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-10-22 15:14:35,472 INFO L425 ceAbstractionStarter]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2018-10-22 15:14:35,473 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))))) [2018-10-22 15:14:35,474 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 15:14:35,474 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 15:14:35,474 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 15:14:35,474 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 15:14:35,474 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 15:14:35,474 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 15:14:35,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:14:35 BoogieIcfgContainer [2018-10-22 15:14:35,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:14:35,509 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 15:14:35,509 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 15:14:35,509 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 15:14:35,509 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:11:42" (3/4) ... [2018-10-22 15:14:35,515 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 15:14:35,527 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 15:14:35,528 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 15:14:35,528 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 15:14:35,537 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2018-10-22 15:14:35,539 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-10-22 15:14:35,539 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 15:14:35,597 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 15:14:35,597 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 15:14:35,598 INFO L168 Benchmark]: Toolchain (without parser) took 174227.01 ms. Allocated memory was 1.0 GB in the beginning and 4.9 GB in the end (delta: 3.9 GB). Free memory was 953.2 MB in the beginning and 1.8 GB in the end (delta: -877.5 MB). Peak memory consumption was 3.0 GB. Max. memory is 11.5 GB. [2018-10-22 15:14:35,598 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:14:35,603 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.86 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 15:14:35,603 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.18 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:14:35,604 INFO L168 Benchmark]: Boogie Preprocessor took 26.04 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:14:35,604 INFO L168 Benchmark]: RCFGBuilder took 539.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -187.6 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. [2018-10-22 15:14:35,607 INFO L168 Benchmark]: TraceAbstraction took 173250.71 ms. Allocated memory was 1.2 GB in the beginning and 4.9 GB in the end (delta: 3.7 GB). Free memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: -700.6 MB). Peak memory consumption was 4.1 GB. Max. memory is 11.5 GB. [2018-10-22 15:14:35,608 INFO L168 Benchmark]: Witness Printer took 88.27 ms. Allocated memory is still 4.9 GB. Free memory is still 1.8 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:14:35,612 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 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 292.86 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.18 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.04 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 539.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -187.6 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 173250.71 ms. Allocated memory was 1.2 GB in the beginning and 4.9 GB in the end (delta: 3.7 GB). Free memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: -700.6 MB). Peak memory consumption was 4.1 GB. Max. memory is 11.5 GB. * Witness Printer took 88.27 ms. Allocated memory is still 4.9 GB. Free memory is still 1.8 GB. 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, 173.1s OverallTime, 19 OverallIterations, 110 TraceHistogramMax, 8.6s AutomataDifference, 0.0s DeadEndRemovalTime, 135.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 867 SDtfs, 1725 SDslu, 3360 SDs, 0 SdLazy, 1186 SolverSat, 324 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8846 GetRequests, 8284 SyntacticMatches, 116 SemanticMatches, 446 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 17.6s 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, 1.2s 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, 66.6s HoareSimplificationTime, 8 FomulaSimplificationsInter, 72380 FormulaSimplificationTreeSizeReductionInter, 69.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 19.5s 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...