./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block LoopFreeBlock --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a881e1073186594f4727f809fbe5d917ff145543 --rcfgbuilder.size.of.a.code.block LoopFreeBlock ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 10:19:10,625 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 10:19:10,627 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 10:19:10,639 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 10:19:10,639 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 10:19:10,641 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 10:19:10,642 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 10:19:10,644 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 10:19:10,646 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 10:19:10,647 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 10:19:10,648 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 10:19:10,648 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 10:19:10,650 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 10:19:10,651 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 10:19:10,652 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 10:19:10,653 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 10:19:10,653 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 10:19:10,655 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 10:19:10,658 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 10:19:10,659 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 10:19:10,660 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 10:19:10,662 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 10:19:10,664 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 10:19:10,665 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 10:19:10,665 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 10:19:10,666 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 10:19:10,667 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 10:19:10,668 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 10:19:10,669 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 10:19:10,672 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 10:19:10,672 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 10:19:10,673 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 10:19:10,673 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 10:19:10,673 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 10:19:10,674 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 10:19:10,676 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 10:19:10,677 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 10:19:10,702 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 10:19:10,703 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 10:19:10,706 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 10:19:10,706 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 10:19:10,706 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 10:19:10,707 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 10:19:10,707 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 10:19:10,707 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 10:19:10,707 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 10:19:10,707 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 10:19:10,707 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 10:19:10,710 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 10:19:10,711 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 10:19:10,711 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 10:19:10,711 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 10:19:10,711 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 10:19:10,711 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 10:19:10,712 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 10:19:10,712 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 10:19:10,712 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 10:19:10,712 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 10:19:10,712 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 10:19:10,712 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 10:19:10,713 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 10:19:10,713 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 10:19:10,713 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 10:19:10,713 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 10:19:10,713 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 10:19:10,714 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 10:19:10,717 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 10:19:10,717 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 10:19:10,717 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 10:19:10,717 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 10:19:10,718 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 10:19:10,718 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a881e1073186594f4727f809fbe5d917ff145543 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock [2018-10-22 10:19:10,788 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 10:19:10,802 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 10:19:10,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 10:19:10,807 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 10:19:10,808 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 10:19:10,809 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-22 10:19:10,868 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/89198c634/a2bb702b70834d00bc853033e154860b/FLAG656767933 [2018-10-22 10:19:11,303 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 10:19:11,306 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-22 10:19:11,313 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/89198c634/a2bb702b70834d00bc853033e154860b/FLAG656767933 [2018-10-22 10:19:11,335 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/89198c634/a2bb702b70834d00bc853033e154860b [2018-10-22 10:19:11,340 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 10:19:11,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 10:19:11,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 10:19:11,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 10:19:11,349 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 10:19:11,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:19:11" (1/1) ... [2018-10-22 10:19:11,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2889e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11, skipping insertion in model container [2018-10-22 10:19:11,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:19:11" (1/1) ... [2018-10-22 10:19:11,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 10:19:11,390 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 10:19:11,579 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:19:11,584 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 10:19:11,604 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:19:11,618 INFO L193 MainTranslator]: Completed translation [2018-10-22 10:19:11,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11 WrapperNode [2018-10-22 10:19:11,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 10:19:11,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 10:19:11,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 10:19:11,620 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 10:19:11,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11" (1/1) ... [2018-10-22 10:19:11,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11" (1/1) ... [2018-10-22 10:19:11,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 10:19:11,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 10:19:11,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 10:19:11,639 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 10:19:11,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11" (1/1) ... [2018-10-22 10:19:11,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11" (1/1) ... [2018-10-22 10:19:11,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11" (1/1) ... [2018-10-22 10:19:11,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11" (1/1) ... [2018-10-22 10:19:11,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11" (1/1) ... [2018-10-22 10:19:11,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11" (1/1) ... [2018-10-22 10:19:11,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11" (1/1) ... [2018-10-22 10:19:11,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 10:19:11,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 10:19:11,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 10:19:11,661 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 10:19:11,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11" (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 10:19:11,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 10:19:11,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 10:19:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 10:19:11,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 10:19:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 10:19:11,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 10:19:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 10:19:11,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 10:19:12,226 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 10:19:12,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:19:12 BoogieIcfgContainer [2018-10-22 10:19:12,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 10:19:12,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 10:19:12,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 10:19:12,237 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 10:19:12,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 10:19:11" (1/3) ... [2018-10-22 10:19:12,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4330c881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:19:12, skipping insertion in model container [2018-10-22 10:19:12,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:19:11" (2/3) ... [2018-10-22 10:19:12,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4330c881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:19:12, skipping insertion in model container [2018-10-22 10:19:12,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:19:12" (3/3) ... [2018-10-22 10:19:12,240 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call_true-termination.i [2018-10-22 10:19:12,248 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 10:19:12,256 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 10:19:12,273 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 10:19:12,312 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 10:19:12,313 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 10:19:12,313 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 10:19:12,313 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 10:19:12,313 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 10:19:12,314 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 10:19:12,314 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 10:19:12,314 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 10:19:12,314 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 10:19:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-10-22 10:19:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 10:19:12,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:12,337 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:12,339 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:12,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:12,344 INFO L82 PathProgramCache]: Analyzing trace with hash -702630595, now seen corresponding path program 1 times [2018-10-22 10:19:12,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:12,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:12,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:12,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:12,397 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:12,471 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 10:19:12,473 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:19:12,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 10:19:12,473 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:19:12,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 10:19:12,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 10:19:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 10:19:12,497 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2018-10-22 10:19:12,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:12,521 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2018-10-22 10:19:12,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 10:19:12,523 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-22 10:19:12,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:12,532 INFO L225 Difference]: With dead ends: 41 [2018-10-22 10:19:12,532 INFO L226 Difference]: Without dead ends: 17 [2018-10-22 10:19:12,536 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 10:19:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-22 10:19:12,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-22 10:19:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 10:19:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-22 10:19:12,572 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2018-10-22 10:19:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:12,572 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-22 10:19:12,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 10:19:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-22 10:19:12,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 10:19:12,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:12,574 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:12,574 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:12,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:12,574 INFO L82 PathProgramCache]: Analyzing trace with hash -972126638, now seen corresponding path program 1 times [2018-10-22 10:19:12,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:12,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:12,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:12,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:12,576 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:12,656 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 10:19:12,657 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:19:12,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 10:19:12,657 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:19:12,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 10:19:12,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 10:19:12,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 10:19:12,659 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-10-22 10:19:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:12,761 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-22 10:19:12,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 10:19:12,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-22 10:19:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:12,763 INFO L225 Difference]: With dead ends: 27 [2018-10-22 10:19:12,763 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 10:19:12,765 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 10:19:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 10:19:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2018-10-22 10:19:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-22 10:19:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-22 10:19:12,771 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2018-10-22 10:19:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:12,772 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-22 10:19:12,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 10:19:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-22 10:19:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 10:19:12,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:12,774 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 10:19:12,775 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:12,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1998515670, now seen corresponding path program 1 times [2018-10-22 10:19:12,775 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:12,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:12,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:12,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:12,778 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:12,871 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 10:19:12,871 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:19:12,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 10:19:12,872 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:19:12,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 10:19:12,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 10:19:12,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 10:19:12,876 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2018-10-22 10:19:12,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:12,918 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-10-22 10:19:12,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 10:19:12,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-10-22 10:19:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:12,920 INFO L225 Difference]: With dead ends: 31 [2018-10-22 10:19:12,920 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 10:19:12,922 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 10:19:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 10:19:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-22 10:19:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 10:19:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-22 10:19:12,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-22 10:19:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:12,928 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-22 10:19:12,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 10:19:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-22 10:19:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 10:19:12,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:12,930 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:12,931 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:12,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:12,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1849156147, now seen corresponding path program 1 times [2018-10-22 10:19:12,932 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:12,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:12,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:12,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:12,934 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:13,035 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 10:19:13,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:13,036 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:13,037 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-10-22 10:19:13,039 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [21], [25], [28], [36], [43], [46], [48], [54], [55], [56], [58], [60] [2018-10-22 10:19:13,090 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 10:19:13,091 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 10:19:14,389 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 10:19:14,391 INFO L272 AbstractInterpreter]: Visited 18 different actions 590 times. Merged at 7 different actions 351 times. Widened at 3 different actions 122 times. Found 71 fixpoints after 5 different actions. Largest state had 10 variables. [2018-10-22 10:19:14,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:14,408 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 10:19:14,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:14,409 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 10:19:14,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:14,417 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:19:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:14,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:14,605 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 10:19:14,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:14,896 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 10:19:14,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:14,917 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 10:19:14,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:14,935 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:19:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:14,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:14,963 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 10:19:14,963 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:14,990 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 10:19:14,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:14,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 10 [2018-10-22 10:19:14,993 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:14,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 10:19:14,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 10:19:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:19:14,995 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-10-22 10:19:15,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:15,071 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-10-22 10:19:15,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 10:19:15,072 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-10-22 10:19:15,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:15,073 INFO L225 Difference]: With dead ends: 35 [2018-10-22 10:19:15,073 INFO L226 Difference]: Without dead ends: 23 [2018-10-22 10:19:15,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 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 10:19:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-22 10:19:15,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-22 10:19:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 10:19:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-22 10:19:15,081 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-22 10:19:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:15,082 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-22 10:19:15,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 10:19:15,082 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-22 10:19:15,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 10:19:15,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:15,083 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:15,083 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:15,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:15,085 INFO L82 PathProgramCache]: Analyzing trace with hash 48575312, now seen corresponding path program 2 times [2018-10-22 10:19:15,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:15,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:15,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:15,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:15,087 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:19:15,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:15,206 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:15,206 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:15,207 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:15,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:15,207 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 10:19:15,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:19:15,225 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:19:15,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:19:15,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:15,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:19:15,382 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:19:15,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:15,539 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 10:19:15,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:19:15,555 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:19:15,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:19:15,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:15,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 10:19:15,664 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 10:19:16,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:16,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 5, 5] total 19 [2018-10-22 10:19:16,018 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:16,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 10:19:16,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 10:19:16,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2018-10-22 10:19:16,020 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2018-10-22 10:19:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:16,060 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-10-22 10:19:16,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 10:19:16,061 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-10-22 10:19:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:16,061 INFO L225 Difference]: With dead ends: 39 [2018-10-22 10:19:16,062 INFO L226 Difference]: Without dead ends: 25 [2018-10-22 10:19:16,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2018-10-22 10:19:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-22 10:19:16,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-22 10:19:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 10:19:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-22 10:19:16,067 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-22 10:19:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:16,067 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-22 10:19:16,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 10:19:16,068 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-22 10:19:16,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-22 10:19:16,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:16,069 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:16,069 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:16,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:16,069 INFO L82 PathProgramCache]: Analyzing trace with hash 562213165, now seen corresponding path program 3 times [2018-10-22 10:19:16,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:16,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:16,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:16,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:16,070 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:19:16,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:16,162 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:16,162 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:16,162 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:16,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:16,163 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 10:19:16,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:19:16,172 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:19:16,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-22 10:19:16,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:16,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 10:19:16,303 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 10:19:16,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:16,384 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 10:19:16,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:19:16,402 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:19:16,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-22 10:19:16,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:16,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 10:19:16,429 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 10:19:16,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:16,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 13 [2018-10-22 10:19:16,439 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:16,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 10:19:16,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 10:19:16,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-10-22 10:19:16,440 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 10 states. [2018-10-22 10:19:16,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:16,963 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2018-10-22 10:19:16,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 10:19:16,964 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-10-22 10:19:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:16,966 INFO L225 Difference]: With dead ends: 67 [2018-10-22 10:19:16,966 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 10:19:16,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2018-10-22 10:19:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 10:19:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2018-10-22 10:19:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-22 10:19:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-22 10:19:16,975 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2018-10-22 10:19:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:16,975 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-22 10:19:16,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 10:19:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-22 10:19:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-22 10:19:16,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:16,976 INFO L375 BasicCegarLoop]: trace histogram [10, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:16,977 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:16,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:16,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1281808046, now seen corresponding path program 4 times [2018-10-22 10:19:16,977 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:16,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:16,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:16,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:16,978 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-22 10:19:17,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:17,073 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:17,073 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:17,073 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:17,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:17,073 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 10:19:17,082 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:19:17,082 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:19:17,100 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:19:17,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:17,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-22 10:19:17,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-22 10:19:17,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:17,290 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 10:19:17,306 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:19:17,306 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:19:17,339 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:19:17,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:17,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-22 10:19:17,352 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-22 10:19:17,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:17,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 19 [2018-10-22 10:19:17,408 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:17,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 10:19:17,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 10:19:17,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 10:19:17,410 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 13 states. [2018-10-22 10:19:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:17,593 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-10-22 10:19:17,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 10:19:17,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2018-10-22 10:19:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:17,595 INFO L225 Difference]: With dead ends: 65 [2018-10-22 10:19:17,595 INFO L226 Difference]: Without dead ends: 44 [2018-10-22 10:19:17,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 10:19:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-22 10:19:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-22 10:19:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 10:19:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-10-22 10:19:17,606 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2018-10-22 10:19:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:17,606 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-10-22 10:19:17,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 10:19:17,607 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-10-22 10:19:17,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 10:19:17,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:17,610 INFO L375 BasicCegarLoop]: trace histogram [12, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:17,610 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:17,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:17,611 INFO L82 PathProgramCache]: Analyzing trace with hash 196518322, now seen corresponding path program 5 times [2018-10-22 10:19:17,611 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:17,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:17,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:17,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:17,612 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-22 10:19:17,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:17,747 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:17,747 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:17,747 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:17,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:17,748 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 10:19:17,757 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 10:19:17,758 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:19:17,787 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-22 10:19:17,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:17,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-22 10:19:17,954 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-22 10:19:18,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:18,055 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 10:19:18,072 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 10:19:18,072 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:19:18,149 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-22 10:19:18,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:18,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-22 10:19:18,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-22 10:19:18,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:18,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 20 [2018-10-22 10:19:18,214 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:18,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 10:19:18,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 10:19:18,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-22 10:19:18,216 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 15 states. [2018-10-22 10:19:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:18,499 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2018-10-22 10:19:18,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 10:19:18,500 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-10-22 10:19:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:18,502 INFO L225 Difference]: With dead ends: 71 [2018-10-22 10:19:18,502 INFO L226 Difference]: Without dead ends: 48 [2018-10-22 10:19:18,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-22 10:19:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-22 10:19:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-22 10:19:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-22 10:19:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-10-22 10:19:18,513 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2018-10-22 10:19:18,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:18,513 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-10-22 10:19:18,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 10:19:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-10-22 10:19:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-22 10:19:18,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:18,520 INFO L375 BasicCegarLoop]: trace histogram [14, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:18,520 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:18,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:18,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1284524178, now seen corresponding path program 6 times [2018-10-22 10:19:18,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:18,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:18,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:18,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:18,523 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 102 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-22 10:19:18,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:18,674 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:18,674 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:18,674 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:18,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:18,675 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 10:19:18,684 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 10:19:18,684 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 10:19:18,699 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-22 10:19:18,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:18,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-22 10:19:18,816 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-22 10:19:18,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:18,928 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 10:19:18,946 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 10:19:18,946 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 10:19:18,989 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-22 10:19:18,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:18,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-22 10:19:19,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-22 10:19:19,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:19,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6, 6, 6] total 18 [2018-10-22 10:19:19,080 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:19,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 10:19:19,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 10:19:19,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2018-10-22 10:19:19,082 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 14 states. [2018-10-22 10:19:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:20,401 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2018-10-22 10:19:20,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 10:19:20,402 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2018-10-22 10:19:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:20,404 INFO L225 Difference]: With dead ends: 113 [2018-10-22 10:19:20,404 INFO L226 Difference]: Without dead ends: 88 [2018-10-22 10:19:20,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=796, Invalid=1654, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 10:19:20,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-22 10:19:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2018-10-22 10:19:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 10:19:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2018-10-22 10:19:20,419 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 47 [2018-10-22 10:19:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:20,419 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2018-10-22 10:19:20,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 10:19:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2018-10-22 10:19:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-22 10:19:20,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:20,421 INFO L375 BasicCegarLoop]: trace histogram [24, 21, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:20,421 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:20,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:20,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1886352255, now seen corresponding path program 7 times [2018-10-22 10:19:20,421 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:20,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:20,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:20,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:20,423 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 262 proven. 56 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-10-22 10:19:20,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:20,539 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:20,539 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:20,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:20,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:20,540 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 10:19:20,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:20,548 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:19:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:20,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 262 proven. 56 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-10-22 10:19:20,963 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 262 proven. 56 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-10-22 10:19:21,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:21,124 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 10:19:21,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:21,140 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:19:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:21,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 262 proven. 56 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-10-22 10:19:21,209 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 262 proven. 56 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-10-22 10:19:21,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:21,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 22 [2018-10-22 10:19:21,293 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:21,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 10:19:21,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 10:19:21,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 10:19:21,294 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 19 states. [2018-10-22 10:19:21,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:21,367 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2018-10-22 10:19:21,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 10:19:21,369 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-10-22 10:19:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:21,370 INFO L225 Difference]: With dead ends: 123 [2018-10-22 10:19:21,370 INFO L226 Difference]: Without dead ends: 77 [2018-10-22 10:19:21,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 257 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 10:19:21,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-22 10:19:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-22 10:19:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-22 10:19:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2018-10-22 10:19:21,394 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2018-10-22 10:19:21,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:21,395 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2018-10-22 10:19:21,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 10:19:21,395 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2018-10-22 10:19:21,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-22 10:19:21,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:21,396 INFO L375 BasicCegarLoop]: trace histogram [27, 24, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:21,399 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:21,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash 451693118, now seen corresponding path program 8 times [2018-10-22 10:19:21,399 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:21,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:21,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:21,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:21,401 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 330 proven. 72 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-10-22 10:19:21,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:21,582 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:21,582 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:21,582 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:21,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:21,582 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 10:19:21,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:19:21,591 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:19:21,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:19:21,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:21,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 330 proven. 72 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-10-22 10:19:21,795 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 330 proven. 72 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-10-22 10:19:21,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:21,911 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 10:19:21,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:19:21,927 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:19:21,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:19:21,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:21,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 330 proven. 72 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-10-22 10:19:22,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 330 proven. 72 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-10-22 10:19:22,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:22,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 23 [2018-10-22 10:19:22,155 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:22,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 10:19:22,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 10:19:22,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-22 10:19:22,157 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 21 states. [2018-10-22 10:19:22,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:22,216 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2018-10-22 10:19:22,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 10:19:22,225 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2018-10-22 10:19:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:22,227 INFO L225 Difference]: With dead ends: 133 [2018-10-22 10:19:22,227 INFO L226 Difference]: Without dead ends: 83 [2018-10-22 10:19:22,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 277 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 10:19:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-22 10:19:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-22 10:19:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 10:19:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2018-10-22 10:19:22,245 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2018-10-22 10:19:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:22,245 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2018-10-22 10:19:22,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 10:19:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2018-10-22 10:19:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 10:19:22,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:22,247 INFO L375 BasicCegarLoop]: trace histogram [30, 27, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:22,247 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:22,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:22,247 INFO L82 PathProgramCache]: Analyzing trace with hash 854337083, now seen corresponding path program 9 times [2018-10-22 10:19:22,247 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:22,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:22,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:22,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:22,248 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 406 proven. 90 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2018-10-22 10:19:22,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:22,394 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:22,394 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:22,394 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:22,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:22,395 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 10:19:22,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:19:22,405 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:19:22,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-22 10:19:22,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:22,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 408 proven. 90 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-10-22 10:19:22,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 8 proven. 490 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-10-22 10:19:22,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:22,717 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 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 10:19:22,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:19:22,735 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:19:22,855 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-22 10:19:22,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:22,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 408 proven. 90 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-10-22 10:19:22,880 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 8 proven. 490 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-10-22 10:19:23,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:23,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 23 [2018-10-22 10:19:23,006 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:23,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 10:19:23,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 10:19:23,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-22 10:19:23,008 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 23 states. [2018-10-22 10:19:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:23,067 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2018-10-22 10:19:23,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 10:19:23,068 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 82 [2018-10-22 10:19:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:23,071 INFO L225 Difference]: With dead ends: 143 [2018-10-22 10:19:23,071 INFO L226 Difference]: Without dead ends: 89 [2018-10-22 10:19:23,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 296 SyntacticMatches, 22 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-22 10:19:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-22 10:19:23,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-22 10:19:23,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 10:19:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2018-10-22 10:19:23,100 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2018-10-22 10:19:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:23,100 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2018-10-22 10:19:23,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 10:19:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2018-10-22 10:19:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-22 10:19:23,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:23,102 INFO L375 BasicCegarLoop]: trace histogram [33, 30, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:23,102 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:23,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:23,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1030508424, now seen corresponding path program 10 times [2018-10-22 10:19:23,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:23,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:23,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:23,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:23,104 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-10-22 10:19:23,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:23,265 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:23,265 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:23,265 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:23,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:23,265 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 10:19:23,275 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:19:23,275 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:19:23,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:19:23,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:23,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-10-22 10:19:23,376 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-10-22 10:19:23,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:23,478 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 10:19:23,494 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:19:23,495 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:19:23,587 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:19:23,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:23,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-10-22 10:19:23,609 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-10-22 10:19:23,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:23,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 16 [2018-10-22 10:19:23,678 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:23,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 10:19:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 10:19:23,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-10-22 10:19:23,679 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 11 states. [2018-10-22 10:19:23,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:23,986 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2018-10-22 10:19:23,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 10:19:23,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 88 [2018-10-22 10:19:23,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:23,988 INFO L225 Difference]: With dead ends: 142 [2018-10-22 10:19:23,988 INFO L226 Difference]: Without dead ends: 137 [2018-10-22 10:19:23,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-10-22 10:19:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-22 10:19:24,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2018-10-22 10:19:24,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-22 10:19:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2018-10-22 10:19:24,003 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 88 [2018-10-22 10:19:24,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:24,004 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2018-10-22 10:19:24,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 10:19:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2018-10-22 10:19:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-22 10:19:24,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:24,006 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:24,006 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:24,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:24,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1215384622, now seen corresponding path program 11 times [2018-10-22 10:19:24,006 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:24,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:24,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:24,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:24,007 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1478 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-22 10:19:24,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:24,279 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:24,279 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:24,279 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:24,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:24,279 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 10:19:24,289 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 10:19:24,289 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:19:24,361 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2018-10-22 10:19:24,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:24,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1478 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-22 10:19:24,463 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1478 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-22 10:19:24,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:24,619 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 10:19:24,640 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 10:19:24,640 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:19:25,058 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2018-10-22 10:19:25,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:25,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1478 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-22 10:19:25,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1478 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-22 10:19:25,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:25,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 19 [2018-10-22 10:19:25,132 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:25,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 10:19:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 10:19:25,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 10:19:25,133 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 13 states. [2018-10-22 10:19:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:25,220 INFO L93 Difference]: Finished difference Result 167 states and 173 transitions. [2018-10-22 10:19:25,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 10:19:25,221 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 113 [2018-10-22 10:19:25,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:25,222 INFO L225 Difference]: With dead ends: 167 [2018-10-22 10:19:25,222 INFO L226 Difference]: Without dead ends: 162 [2018-10-22 10:19:25,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 10:19:25,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-22 10:19:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 139. [2018-10-22 10:19:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-22 10:19:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2018-10-22 10:19:25,242 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 113 [2018-10-22 10:19:25,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:25,243 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2018-10-22 10:19:25,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 10:19:25,243 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2018-10-22 10:19:25,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-22 10:19:25,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:25,244 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:25,245 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:25,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:25,245 INFO L82 PathProgramCache]: Analyzing trace with hash -179025480, now seen corresponding path program 12 times [2018-10-22 10:19:25,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:25,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:25,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:25,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:25,246 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-22 10:19:25,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:25,899 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:25,899 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:25,899 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:25,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:25,899 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 10:19:25,908 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 10:19:25,908 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 10:19:25,972 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-22 10:19:25,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:25,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-22 10:19:26,096 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-22 10:19:26,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:26,336 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 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 10:19:26,354 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 10:19:26,354 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 10:19:26,784 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-22 10:19:26,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:26,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-22 10:19:26,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-22 10:19:26,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:26,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 20 [2018-10-22 10:19:26,946 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:26,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 10:19:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 10:19:26,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-22 10:19:26,947 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand 15 states. [2018-10-22 10:19:27,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:27,159 INFO L93 Difference]: Finished difference Result 192 states and 199 transitions. [2018-10-22 10:19:27,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 10:19:27,161 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 138 [2018-10-22 10:19:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:27,164 INFO L225 Difference]: With dead ends: 192 [2018-10-22 10:19:27,164 INFO L226 Difference]: Without dead ends: 187 [2018-10-22 10:19:27,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 537 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-22 10:19:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-22 10:19:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 164. [2018-10-22 10:19:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-22 10:19:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 170 transitions. [2018-10-22 10:19:27,196 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 170 transitions. Word has length 138 [2018-10-22 10:19:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:27,199 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 170 transitions. [2018-10-22 10:19:27,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 10:19:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 170 transitions. [2018-10-22 10:19:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-22 10:19:27,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:27,202 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:27,202 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:27,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:27,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1976631954, now seen corresponding path program 13 times [2018-10-22 10:19:27,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:27,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:27,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:27,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:27,204 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 3687 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-22 10:19:27,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:27,496 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:27,496 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:27,496 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:27,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:27,496 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 10:19:27,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:27,505 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:19:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:27,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 3687 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-22 10:19:27,752 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 3687 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-22 10:19:27,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:27,945 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 10:19:27,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:27,961 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:19:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:28,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 3687 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-22 10:19:28,153 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 3687 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-22 10:19:28,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:28,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 21 [2018-10-22 10:19:28,275 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:28,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 10:19:28,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 10:19:28,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-22 10:19:28,276 INFO L87 Difference]: Start difference. First operand 164 states and 170 transitions. Second operand 17 states. [2018-10-22 10:19:28,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:28,702 INFO L93 Difference]: Finished difference Result 217 states and 225 transitions. [2018-10-22 10:19:28,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 10:19:28,703 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 163 [2018-10-22 10:19:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:28,704 INFO L225 Difference]: With dead ends: 217 [2018-10-22 10:19:28,705 INFO L226 Difference]: Without dead ends: 212 [2018-10-22 10:19:28,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 633 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-22 10:19:28,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-22 10:19:28,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 189. [2018-10-22 10:19:28,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-22 10:19:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 196 transitions. [2018-10-22 10:19:28,739 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 196 transitions. Word has length 163 [2018-10-22 10:19:28,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:28,740 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 196 transitions. [2018-10-22 10:19:28,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 10:19:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 196 transitions. [2018-10-22 10:19:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-22 10:19:28,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:28,743 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:28,743 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:28,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash -6024456, now seen corresponding path program 14 times [2018-10-22 10:19:28,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:28,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:28,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:19:28,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:28,745 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5159 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-22 10:19:29,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:29,564 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:29,565 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:29,565 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:29,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:29,565 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 10:19:29,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:19:29,583 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:19:29,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:19:29,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:29,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5159 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-22 10:19:29,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5159 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-22 10:19:30,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:30,183 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 10:19:30,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:19:30,199 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:19:30,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:19:30,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:30,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:30,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5159 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-22 10:19:30,428 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5159 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-22 10:19:30,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:30,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 22 [2018-10-22 10:19:30,536 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:30,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 10:19:30,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 10:19:30,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 10:19:30,537 INFO L87 Difference]: Start difference. First operand 189 states and 196 transitions. Second operand 19 states. [2018-10-22 10:19:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:30,652 INFO L93 Difference]: Finished difference Result 242 states and 251 transitions. [2018-10-22 10:19:30,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 10:19:30,653 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 188 [2018-10-22 10:19:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:30,654 INFO L225 Difference]: With dead ends: 242 [2018-10-22 10:19:30,654 INFO L226 Difference]: Without dead ends: 237 [2018-10-22 10:19:30,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 729 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 10:19:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-22 10:19:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 214. [2018-10-22 10:19:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-22 10:19:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 222 transitions. [2018-10-22 10:19:30,679 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 222 transitions. Word has length 188 [2018-10-22 10:19:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:30,681 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 222 transitions. [2018-10-22 10:19:30,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 10:19:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 222 transitions. [2018-10-22 10:19:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-22 10:19:30,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:30,683 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:30,683 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:30,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:30,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1794777426, now seen corresponding path program 15 times [2018-10-22 10:19:30,684 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:30,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:30,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:30,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:30,685 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 6876 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-22 10:19:30,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:30,982 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:30,982 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:30,982 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:30,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:30,982 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-22 10:19:30,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:19:30,999 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:19:31,178 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2018-10-22 10:19:31,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:31,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 6876 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-22 10:19:31,365 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 6876 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-22 10:19:31,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:31,604 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 10:19:31,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:19:31,619 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:19:32,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2018-10-22 10:19:32,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:32,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 6876 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-22 10:19:32,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 6876 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-22 10:19:33,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:33,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 23 [2018-10-22 10:19:33,280 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:33,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 10:19:33,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 10:19:33,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-22 10:19:33,281 INFO L87 Difference]: Start difference. First operand 214 states and 222 transitions. Second operand 21 states. [2018-10-22 10:19:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:33,387 INFO L93 Difference]: Finished difference Result 267 states and 277 transitions. [2018-10-22 10:19:33,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 10:19:33,388 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 213 [2018-10-22 10:19:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:33,389 INFO L225 Difference]: With dead ends: 267 [2018-10-22 10:19:33,390 INFO L226 Difference]: Without dead ends: 262 [2018-10-22 10:19:33,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 825 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-22 10:19:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-10-22 10:19:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 239. [2018-10-22 10:19:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-22 10:19:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 248 transitions. [2018-10-22 10:19:33,419 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 248 transitions. Word has length 213 [2018-10-22 10:19:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:33,419 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 248 transitions. [2018-10-22 10:19:33,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 10:19:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 248 transitions. [2018-10-22 10:19:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-22 10:19:33,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:33,421 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:33,421 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:33,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:33,422 INFO L82 PathProgramCache]: Analyzing trace with hash -715715528, now seen corresponding path program 16 times [2018-10-22 10:19:33,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:33,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:33,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:33,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:33,423 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 8838 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-22 10:19:33,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:33,822 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:19:33,822 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:19:33,822 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:19:33,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:33,823 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:19:33,835 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:19:33,835 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:19:33,932 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:19:33,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:33,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 8838 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-22 10:19:35,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 8838 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-22 10:19:35,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:19:35,876 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 33 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 33 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:19:35,895 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:19:35,895 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:19:36,145 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:19:36,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:19:36,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:19:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 8838 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-22 10:19:36,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:19:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 8838 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-22 10:19:36,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:19:36,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 23 [2018-10-22 10:19:36,449 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:19:36,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 10:19:36,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 10:19:36,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-22 10:19:36,450 INFO L87 Difference]: Start difference. First operand 239 states and 248 transitions. Second operand 23 states. [2018-10-22 10:19:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:36,609 INFO L93 Difference]: Finished difference Result 292 states and 303 transitions. [2018-10-22 10:19:36,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 10:19:36,610 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 238 [2018-10-22 10:19:36,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:36,612 INFO L225 Difference]: With dead ends: 292 [2018-10-22 10:19:36,612 INFO L226 Difference]: Without dead ends: 287 [2018-10-22 10:19:36,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 920 SyntacticMatches, 22 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2018-10-22 10:19:36,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-10-22 10:19:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 264. [2018-10-22 10:19:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-10-22 10:19:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 274 transitions. [2018-10-22 10:19:36,650 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 274 transitions. Word has length 238 [2018-10-22 10:19:36,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:36,651 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 274 transitions. [2018-10-22 10:19:36,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 10:19:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 274 transitions. [2018-10-22 10:19:36,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-22 10:19:36,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:19:36,653 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:19:36,653 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:19:36,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:19:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash -642379758, now seen corresponding path program 17 times [2018-10-22 10:19:36,654 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:19:36,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:36,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:19:36,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:19:36,655 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:19:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:19:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 12127 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-22 10:19:42,064 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:19:42,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2018-10-22 10:19:42,064 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:19:42,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-22 10:19:42,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-22 10:19:42,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5257, Invalid=5663, Unknown=0, NotChecked=0, Total=10920 [2018-10-22 10:19:42,068 INFO L87 Difference]: Start difference. First operand 264 states and 274 transitions. Second operand 105 states. [2018-10-22 10:19:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:19:46,732 INFO L93 Difference]: Finished difference Result 10704 states and 11164 transitions. [2018-10-22 10:19:46,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-22 10:19:46,732 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 263 [2018-10-22 10:19:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:19:46,733 INFO L225 Difference]: With dead ends: 10704 [2018-10-22 10:19:46,733 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 10:19:46,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 10:19:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 10:19:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 10:19:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 10:19:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 10:19:46,762 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 263 [2018-10-22 10:19:46,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:19:46,762 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 10:19:46,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-22 10:19:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 10:19:46,762 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 10:19:46,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 10:19:48,993 WARN L179 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-22 10:19:53,197 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,499 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,501 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,522 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,543 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,554 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,567 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,571 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,591 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,630 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,656 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,737 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,788 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,804 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,822 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,870 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,891 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,903 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,926 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,940 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:55,981 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,020 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,035 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,051 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,070 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,178 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,215 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,220 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,225 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,262 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,525 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,551 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,629 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,689 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,737 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,817 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,828 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,845 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,934 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,941 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:56,995 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,118 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,192 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,249 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,258 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,390 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,438 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,486 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,596 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,696 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,807 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,885 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:57,912 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:58,304 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:58,322 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:58,426 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:58,481 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:58,529 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:58,870 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:58,976 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,047 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,122 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,167 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,365 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,372 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,428 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,463 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,536 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,594 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,648 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,669 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:19:59,986 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,147 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,190 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,366 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,375 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,448 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,457 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,465 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,585 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,786 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,799 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,853 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,862 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,871 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:00,938 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:01,105 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:01,134 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:01,202 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:01,319 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:01,479 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:01,580 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:01,664 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:01,732 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:01,979 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:02,202 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:02,284 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:02,306 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:02,390 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:02,723 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:03,105 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:03,230 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:03,261 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:03,319 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:03,338 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:03,433 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:03,585 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:03,761 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:03,784 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:03,905 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:04,579 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:04,650 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:04,913 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:04,976 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:05,031 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:05,169 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:05,660 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:05,773 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:05,824 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:06,102 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:06,256 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:06,280 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:06,461 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:06,562 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:06,802 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:07,000 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:07,035 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:07,319 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:07,401 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:07,425 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:07,580 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:07,781 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:07,946 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:08,141 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:08,745 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:09,919 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:09,948 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:10,141 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:10,383 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:10,590 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:10,655 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:11,120 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:11,258 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:11,380 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:11,762 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:12,217 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:13,217 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:13,244 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:13,595 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:13,626 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:13,749 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:13,875 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:14,050 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:14,083 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:14,285 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:14,372 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:14,400 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:14,954 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:15,464 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:15,635 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:15,693 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:15,709 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:15,852 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:16,066 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:16,773 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:16,983 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:17,014 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:17,575 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:17,830 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:17,999 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:18,871 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:19,573 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:19,606 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:19,717 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:20,439 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:21,468 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:21,677 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:22,511 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:22,745 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:22,831 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:23,222 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:23,278 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:23,318 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:23,800 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:25,087 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:25,834 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:26,734 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:26,928 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:27,345 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:28,352 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:28,716 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:28,915 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:29,117 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:29,224 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:29,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:30,411 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:32,042 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:32,471 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:33,509 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:34,262 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:35,163 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:37,788 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:37,994 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:38,040 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:38,440 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:38,608 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:38,830 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:39,054 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:39,570 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:40,852 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:41,541 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:42,570 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:48,065 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:51,644 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:54,271 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:54,635 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:56,615 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:56,783 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:56,898 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:57,011 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:57,337 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:20:58,473 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:21:01,002 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:21:06,301 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 10:21:15,800 WARN L179 SmtUtils]: Spent 1.45 m on a formula simplification. DAG size of input: 5175 DAG size of output: 2149 [2018-10-22 10:21:22,758 WARN L179 SmtUtils]: Spent 6.93 s on a formula simplification. DAG size of input: 664 DAG size of output: 59 [2018-10-22 10:22:52,668 WARN L179 SmtUtils]: Spent 1.50 m on a formula simplification. DAG size of input: 2124 DAG size of output: 363 [2018-10-22 10:22:52,672 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 10:22:52,672 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:22:52,672 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:22:52,673 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 10:22:52,673 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 10:22:52,673 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 10:22:52,673 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 24) no Hoare annotation was computed. [2018-10-22 10:22:52,673 INFO L425 ceAbstractionStarter]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2018-10-22 10:22:52,673 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-10-22 10:22:52,673 INFO L425 ceAbstractionStarter]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2018-10-22 10:22:52,674 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 10:22:52,674 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 24) no Hoare annotation was computed. [2018-10-22 10:22:52,674 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 10:22:52,674 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 24) the Hoare annotation is: true [2018-10-22 10:22:52,674 INFO L425 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-10-22 10:22:52,674 INFO L425 ceAbstractionStarter]: For program point L18-1(lines 18 20) no Hoare annotation was computed. [2018-10-22 10:22:52,674 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-10-22 10:22:52,674 INFO L425 ceAbstractionStarter]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2018-10-22 10:22:52,676 INFO L421 ceAbstractionStarter]: At program point L18-4(lines 18 20) the Hoare annotation is: (let ((.cse6 (<= 10 main_~m~0)) (.cse39 (<= main_~j~0 2))) (let ((.cse29 (<= main_~j~0 4)) (.cse10 (<= main_~j~0 0)) (.cse24 (<= main_~j~0 3)) (.cse33 (<= main_~j~0 1)) (.cse32 (<= main_~j~0 9)) (.cse14 (<= main_~j~0 7)) (.cse16 (<= main_~j~0 8)) (.cse11 (<= main_~j~0 5)) (.cse23 (<= main_~j~0 6)) (.cse30 (and .cse6 .cse39)) (.cse2 (<= 10 main_~n~0))) (let ((.cse7 (and .cse30 .cse2)) (.cse38 (<= 10 main_~k~0)) (.cse27 (and .cse6 .cse2 .cse23)) (.cse0 (and .cse11 .cse6)) (.cse40 (<= 30 main_~k~0)) (.cse17 (<= main_~i~0 0)) (.cse26 (<= 70 main_~k~0)) (.cse9 (<= 60 main_~k~0)) (.cse37 (<= 90 main_~k~0)) (.cse34 (<= 20 main_~k~0)) (.cse25 (and .cse16 .cse6 .cse2)) (.cse8 (and .cse6 .cse14 .cse2)) (.cse31 (<= 50 main_~k~0)) (.cse21 (and .cse6 .cse32)) (.cse20 (<= main_~i~0 7)) (.cse15 (<= main_~i~0 5)) (.cse3 (and .cse6 .cse33 .cse2)) (.cse19 (and .cse6 .cse24)) (.cse41 (<= 80 main_~k~0)) (.cse1 (<= main_~i~0 8)) (.cse36 (and .cse6 .cse10 .cse2)) (.cse28 (<= main_~i~0 3)) (.cse4 (<= main_~i~0 6)) (.cse13 (<= main_~i~0 1)) (.cse22 (<= main_~i~0 2)) (.cse5 (<= (+ main_~i~0 1) main_~n~0)) (.cse18 (and .cse6 .cse29)) (.cse35 (<= 40 main_~k~0)) (.cse12 (<= main_~i~0 4))) (or (and (<= 85 main_~k~0) .cse0 .cse1 .cse2) (and .cse3 .cse4 (<= 61 main_~k~0)) (and (<= 100 main_~k~0) (and .cse5 .cse6 .cse2)) (and (and .cse5 .cse7) (<= 92 main_~k~0)) (and .cse1 .cse8 (<= 87 main_~k~0)) (and .cse6 .cse9 .cse10 .cse4 .cse2) (and .cse11 .cse6 (<= 45 main_~k~0) .cse12 .cse2) (and .cse6 .cse13 (<= 17 main_~k~0) .cse14 .cse2) (and .cse15 .cse3 (<= 51 main_~k~0)) (and .cse16 .cse6 (<= 8 main_~k~0) .cse17 .cse2) (and (<= 64 main_~k~0) .cse4 .cse2 .cse18) (and .cse19 .cse20 .cse2 (<= 73 main_~k~0)) (and (<= 99 main_~k~0) (and .cse5 .cse21 .cse2)) (and .cse6 (<= 26 main_~k~0) .cse22 .cse2 .cse23) (and .cse11 .cse6 (<= 55 main_~k~0) .cse15 .cse2) (and (<= 89 main_~k~0) .cse21 .cse1 .cse2) (and (<= 69 main_~k~0) .cse21 .cse4 .cse2) (and .cse6 .cse24 (<= 3 main_~k~0) .cse17 .cse2) (and .cse25 .cse1 (<= 88 main_~k~0)) (and .cse26 .cse6 .cse10 .cse20 .cse2) (and (<= 66 main_~k~0) .cse27 .cse4) (and (<= 16 main_~k~0) .cse6 .cse13 .cse2 .cse23) (and .cse6 (<= 0 main_~k~0) .cse10 .cse17 .cse2) (and .cse28 .cse6 .cse29 (<= 34 main_~k~0) .cse2) (and .cse27 (<= 56 main_~k~0) .cse15) (and .cse16 (<= 28 main_~k~0) .cse6 .cse22 .cse2) (and .cse6 (<= 6 main_~k~0) .cse17 .cse2 .cse23) (and .cse15 (<= 52 main_~k~0) .cse30 .cse2) (and (and .cse5 .cse27) (<= 96 main_~k~0)) (and .cse31 .cse12 .cse6 .cse2) (and .cse6 (<= 9 main_~k~0) .cse32 .cse17 .cse2) (and (<= 21 main_~k~0) .cse6 .cse33 .cse22 .cse2) (and .cse12 .cse27 (<= 46 main_~k~0)) (and .cse28 .cse6 (<= 39 main_~k~0) .cse32 .cse2) (and .cse30 .cse20 (<= 72 main_~k~0) .cse2) (and (<= 67 main_~k~0) .cse8 .cse4) (and .cse12 .cse30 (<= 42 main_~k~0) .cse2) (and .cse6 .cse24 .cse13 (<= 13 main_~k~0) .cse2) (and .cse6 .cse34 .cse13 .cse2) (and (<= 33 main_~k~0) .cse28 .cse19 .cse2) (and .cse11 .cse6 (<= 65 main_~k~0) .cse4 .cse2) (and (<= 97 main_~k~0) (and .cse5 .cse8)) (and .cse28 (<= 32 main_~k~0) .cse30 .cse2) (and (<= 82 main_~k~0) .cse7 .cse1) (and (<= 58 main_~k~0) .cse15 .cse25) (and .cse28 .cse6 .cse35 .cse2) (and (and .cse5 .cse36) .cse37) (and .cse6 .cse38 .cse17 .cse2) (and .cse6 .cse33 .cse17 .cse2 (<= 1 main_~k~0)) (and .cse6 (<= 22 main_~k~0) .cse22 .cse39 .cse2) (and (<= 11 main_~k~0) .cse6 .cse33 .cse13 .cse2) (and .cse40 .cse28 .cse6 .cse10 .cse2) (and .cse41 .cse6 .cse20 .cse2) (and .cse11 .cse6 (<= 5 main_~k~0) .cse17 .cse2) (and (<= 83 main_~k~0) .cse1 .cse2 .cse19) (and .cse6 (<= 29 main_~k~0) .cse22 .cse32 .cse2) (and .cse11 .cse6 (<= 25 main_~k~0) .cse22 .cse2) (and .cse6 .cse38 .cse13 .cse10 .cse2) (and .cse28 .cse3 (<= 31 main_~k~0)) (and .cse6 .cse12 .cse29 (<= 44 main_~k~0) .cse2) (and .cse6 (<= 7 main_~k~0) .cse14 .cse17 .cse2) (and (<= 86 main_~k~0) .cse27 .cse1) (and .cse12 .cse8 (<= 47 main_~k~0)) (and (<= 2 main_~k~0) .cse6 .cse39 .cse17 .cse2) (and (and .cse5 .cse2 .cse19) (<= 93 main_~k~0)) (and .cse27 .cse20 (<= 76 main_~k~0)) (and .cse12 .cse19 (<= 43 main_~k~0) .cse2) (and (<= 95 main_~k~0) (and .cse5 .cse0 .cse2)) (and (<= 23 main_~k~0) .cse6 .cse24 .cse22 .cse2) (and (<= 78 main_~k~0) .cse25 .cse20) (and .cse6 .cse12 .cse32 (<= 49 main_~k~0) .cse2) (and .cse6 .cse22 .cse29 .cse2 (<= 24 main_~k~0)) (and .cse11 (<= 75 main_~k~0) .cse6 .cse20 .cse2) (and (<= 84 main_~k~0) .cse1 .cse2 .cse18) (and .cse40 .cse6 .cse22 .cse2) (and .cse6 .cse29 .cse17 (<= 4 main_~k~0) .cse2) (and .cse26 .cse6 .cse4 .cse2) (and (<= 37 main_~k~0) .cse28 .cse6 .cse14 .cse2) (and .cse15 .cse8 (<= 57 main_~k~0)) (and .cse28 .cse6 (<= 36 main_~k~0) .cse2 .cse23) (and .cse3 (<= 81 main_~k~0) .cse1) (and (<= 68 main_~k~0) .cse25 .cse4) (and .cse9 .cse6 .cse15 .cse2) (and .cse25 .cse12 (<= 48 main_~k~0)) (and (<= 59 main_~k~0) .cse15 .cse21 .cse2) (and .cse1 .cse6 .cse2 .cse37) (and .cse6 .cse13 .cse39 (<= 12 main_~k~0) .cse2) (and .cse28 .cse11 .cse6 (<= 35 main_~k~0) .cse2) (and .cse6 .cse34 .cse22 .cse10 .cse2) (and (and .cse5 .cse25) (<= 98 main_~k~0)) (and .cse8 .cse20 (<= 77 main_~k~0)) (and .cse31 .cse6 .cse15 .cse10 .cse2) (and .cse12 .cse3 (<= 41 main_~k~0)) (and .cse6 .cse13 .cse32 .cse2 (<= 19 main_~k~0)) (and .cse11 .cse6 (<= 15 main_~k~0) .cse13 .cse2) (and .cse21 .cse20 (<= 79 main_~k~0) .cse2) (and (<= 54 main_~k~0) .cse15 .cse2 .cse18) (and (<= 74 main_~k~0) .cse20 .cse2 .cse18) (and .cse3 (<= 71 main_~k~0) .cse20) (and (<= 53 main_~k~0) .cse19 .cse15 .cse2) (and .cse16 .cse6 (<= 18 main_~k~0) .cse13 .cse2) (and (<= 91 main_~k~0) (and .cse5 .cse3)) (and .cse19 (<= 63 main_~k~0) .cse4 .cse2) (and .cse41 .cse1 .cse36) (and .cse28 .cse16 .cse6 (<= 38 main_~k~0) .cse2) (and .cse30 (<= 62 main_~k~0) .cse4 .cse2) (and (<= 14 main_~k~0) .cse6 .cse13 .cse29 .cse2) (and .cse6 .cse22 .cse14 .cse2 (<= 27 main_~k~0)) (and (and .cse5 .cse2 .cse18) (<= 94 main_~k~0)) (and .cse6 .cse35 .cse12 .cse10 .cse2))))) [2018-10-22 10:22:52,676 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 10:22:52,676 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 10:22:52,677 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 10:22:52,677 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 10:22:52,677 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 10:22:52,677 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 10:22:52,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 10:22:52 BoogieIcfgContainer [2018-10-22 10:22:52,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 10:22:52,713 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 10:22:52,713 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 10:22:52,713 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 10:22:52,716 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:19:12" (3/4) ... [2018-10-22 10:22:52,721 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 10:22:52,728 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 10:22:52,729 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 10:22:52,729 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 10:22:52,735 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2018-10-22 10:22:52,735 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-10-22 10:22:52,735 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 10:22:52,798 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 10:22:52,799 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 10:22:52,800 INFO L168 Benchmark]: Toolchain (without parser) took 221458.95 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 4.3 GB in the end (delta: -3.3 GB). Peak memory consumption was 539.6 MB. Max. memory is 11.5 GB. [2018-10-22 10:22:52,802 INFO L168 Benchmark]: CDTParser took 0.19 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 10:22:52,803 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.61 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 10:22:52,803 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.20 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:22:52,803 INFO L168 Benchmark]: Boogie Preprocessor took 21.66 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:22:52,804 INFO L168 Benchmark]: RCFGBuilder took 565.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. [2018-10-22 10:22:52,807 INFO L168 Benchmark]: TraceAbstraction took 220484.86 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 4.3 GB in the end (delta: -3.2 GB). Peak memory consumption was 4.4 GB. Max. memory is 11.5 GB. [2018-10-22 10:22:52,807 INFO L168 Benchmark]: Witness Printer took 85.61 ms. Allocated memory is still 4.9 GB. Free memory is still 4.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:22:52,814 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 276.61 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 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 19.20 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.66 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 565.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 220484.86 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 4.3 GB in the end (delta: -3.2 GB). Peak memory consumption was 4.4 GB. Max. memory is 11.5 GB. * Witness Printer took 85.61 ms. Allocated memory is still 4.9 GB. Free memory is still 4.3 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: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((85 <= k && j <= 5 && 10 <= m) && i <= 8) && 10 <= n) || ((((10 <= m && j <= 1) && 10 <= n) && i <= 6) && 61 <= k)) || (100 <= k && (i + 1 <= n && 10 <= m) && 10 <= n)) || ((i + 1 <= n && (10 <= m && j <= 2) && 10 <= n) && 92 <= k)) || ((i <= 8 && (10 <= m && j <= 7) && 10 <= n) && 87 <= k)) || ((((10 <= m && 60 <= k) && j <= 0) && i <= 6) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 45 <= k) && i <= 4) && 10 <= n)) || ((((10 <= m && i <= 1) && 17 <= k) && j <= 7) && 10 <= n)) || ((i <= 5 && (10 <= m && j <= 1) && 10 <= n) && 51 <= k)) || ((((j <= 8 && 10 <= m) && 8 <= k) && i <= 0) && 10 <= n)) || (((64 <= k && i <= 6) && 10 <= n) && 10 <= m && j <= 4)) || ((((10 <= m && j <= 3) && i <= 7) && 10 <= n) && 73 <= k)) || (99 <= k && (i + 1 <= n && 10 <= m && j <= 9) && 10 <= n)) || ((((10 <= m && 26 <= k) && i <= 2) && 10 <= n) && j <= 6)) || ((((j <= 5 && 10 <= m) && 55 <= k) && i <= 5) && 10 <= n)) || (((89 <= k && 10 <= m && j <= 9) && i <= 8) && 10 <= n)) || (((69 <= k && 10 <= m && j <= 9) && i <= 6) && 10 <= n)) || ((((10 <= m && j <= 3) && 3 <= k) && i <= 0) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 10 <= n) && i <= 8) && 88 <= k)) || ((((70 <= k && 10 <= m) && j <= 0) && i <= 7) && 10 <= n)) || ((66 <= k && (10 <= m && 10 <= n) && j <= 6) && i <= 6)) || ((((16 <= k && 10 <= m) && i <= 1) && 10 <= n) && j <= 6)) || ((((10 <= m && 0 <= k) && j <= 0) && i <= 0) && 10 <= n)) || ((((i <= 3 && 10 <= m) && j <= 4) && 34 <= k) && 10 <= n)) || ((((10 <= m && 10 <= n) && j <= 6) && 56 <= k) && i <= 5)) || ((((j <= 8 && 28 <= k) && 10 <= m) && i <= 2) && 10 <= n)) || ((((10 <= m && 6 <= k) && i <= 0) && 10 <= n) && j <= 6)) || (((i <= 5 && 52 <= k) && 10 <= m && j <= 2) && 10 <= n)) || ((i + 1 <= n && (10 <= m && 10 <= n) && j <= 6) && 96 <= k)) || (((50 <= k && i <= 4) && 10 <= m) && 10 <= n)) || ((((10 <= m && 9 <= k) && j <= 9) && i <= 0) && 10 <= n)) || ((((21 <= k && 10 <= m) && j <= 1) && i <= 2) && 10 <= n)) || ((i <= 4 && (10 <= m && 10 <= n) && j <= 6) && 46 <= k)) || ((((i <= 3 && 10 <= m) && 39 <= k) && j <= 9) && 10 <= n)) || ((((10 <= m && j <= 2) && i <= 7) && 72 <= k) && 10 <= n)) || ((67 <= k && (10 <= m && j <= 7) && 10 <= n) && i <= 6)) || (((i <= 4 && 10 <= m && j <= 2) && 42 <= k) && 10 <= n)) || ((((10 <= m && j <= 3) && i <= 1) && 13 <= k) && 10 <= n)) || (((10 <= m && 20 <= k) && i <= 1) && 10 <= n)) || (((33 <= k && i <= 3) && 10 <= m && j <= 3) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 65 <= k) && i <= 6) && 10 <= n)) || (97 <= k && i + 1 <= n && (10 <= m && j <= 7) && 10 <= n)) || (((i <= 3 && 32 <= k) && 10 <= m && j <= 2) && 10 <= n)) || ((82 <= k && (10 <= m && j <= 2) && 10 <= n) && i <= 8)) || ((58 <= k && i <= 5) && (j <= 8 && 10 <= m) && 10 <= n)) || (((i <= 3 && 10 <= m) && 40 <= k) && 10 <= n)) || ((i + 1 <= n && (10 <= m && j <= 0) && 10 <= n) && 90 <= k)) || (((10 <= m && 10 <= k) && i <= 0) && 10 <= n)) || ((((10 <= m && j <= 1) && i <= 0) && 10 <= n) && 1 <= k)) || ((((10 <= m && 22 <= k) && i <= 2) && j <= 2) && 10 <= n)) || ((((11 <= k && 10 <= m) && j <= 1) && i <= 1) && 10 <= n)) || ((((30 <= k && i <= 3) && 10 <= m) && j <= 0) && 10 <= n)) || (((80 <= k && 10 <= m) && i <= 7) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 5 <= k) && i <= 0) && 10 <= n)) || (((83 <= k && i <= 8) && 10 <= n) && 10 <= m && j <= 3)) || ((((10 <= m && 29 <= k) && i <= 2) && j <= 9) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 25 <= k) && i <= 2) && 10 <= n)) || ((((10 <= m && 10 <= k) && i <= 1) && j <= 0) && 10 <= n)) || ((i <= 3 && (10 <= m && j <= 1) && 10 <= n) && 31 <= k)) || ((((10 <= m && i <= 4) && j <= 4) && 44 <= k) && 10 <= n)) || ((((10 <= m && 7 <= k) && j <= 7) && i <= 0) && 10 <= n)) || ((86 <= k && (10 <= m && 10 <= n) && j <= 6) && i <= 8)) || ((i <= 4 && (10 <= m && j <= 7) && 10 <= n) && 47 <= k)) || ((((2 <= k && 10 <= m) && j <= 2) && i <= 0) && 10 <= n)) || (((i + 1 <= n && 10 <= n) && 10 <= m && j <= 3) && 93 <= k)) || ((((10 <= m && 10 <= n) && j <= 6) && i <= 7) && 76 <= k)) || (((i <= 4 && 10 <= m && j <= 3) && 43 <= k) && 10 <= n)) || (95 <= k && (i + 1 <= n && j <= 5 && 10 <= m) && 10 <= n)) || ((((23 <= k && 10 <= m) && j <= 3) && i <= 2) && 10 <= n)) || ((78 <= k && (j <= 8 && 10 <= m) && 10 <= n) && i <= 7)) || ((((10 <= m && i <= 4) && j <= 9) && 49 <= k) && 10 <= n)) || ((((10 <= m && i <= 2) && j <= 4) && 10 <= n) && 24 <= k)) || ((((j <= 5 && 75 <= k) && 10 <= m) && i <= 7) && 10 <= n)) || (((84 <= k && i <= 8) && 10 <= n) && 10 <= m && j <= 4)) || (((30 <= k && 10 <= m) && i <= 2) && 10 <= n)) || ((((10 <= m && j <= 4) && i <= 0) && 4 <= k) && 10 <= n)) || (((70 <= k && 10 <= m) && i <= 6) && 10 <= n)) || ((((37 <= k && i <= 3) && 10 <= m) && j <= 7) && 10 <= n)) || ((i <= 5 && (10 <= m && j <= 7) && 10 <= n) && 57 <= k)) || ((((i <= 3 && 10 <= m) && 36 <= k) && 10 <= n) && j <= 6)) || ((((10 <= m && j <= 1) && 10 <= n) && 81 <= k) && i <= 8)) || ((68 <= k && (j <= 8 && 10 <= m) && 10 <= n) && i <= 6)) || (((60 <= k && 10 <= m) && i <= 5) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 10 <= n) && i <= 4) && 48 <= k)) || (((59 <= k && i <= 5) && 10 <= m && j <= 9) && 10 <= n)) || (((i <= 8 && 10 <= m) && 10 <= n) && 90 <= k)) || ((((10 <= m && i <= 1) && j <= 2) && 12 <= k) && 10 <= n)) || ((((i <= 3 && j <= 5) && 10 <= m) && 35 <= k) && 10 <= n)) || ((((10 <= m && 20 <= k) && i <= 2) && j <= 0) && 10 <= n)) || ((i + 1 <= n && (j <= 8 && 10 <= m) && 10 <= n) && 98 <= k)) || ((((10 <= m && j <= 7) && 10 <= n) && i <= 7) && 77 <= k)) || ((((50 <= k && 10 <= m) && i <= 5) && j <= 0) && 10 <= n)) || ((i <= 4 && (10 <= m && j <= 1) && 10 <= n) && 41 <= k)) || ((((10 <= m && i <= 1) && j <= 9) && 10 <= n) && 19 <= k)) || ((((j <= 5 && 10 <= m) && 15 <= k) && i <= 1) && 10 <= n)) || ((((10 <= m && j <= 9) && i <= 7) && 79 <= k) && 10 <= n)) || (((54 <= k && i <= 5) && 10 <= n) && 10 <= m && j <= 4)) || (((74 <= k && i <= 7) && 10 <= n) && 10 <= m && j <= 4)) || ((((10 <= m && j <= 1) && 10 <= n) && 71 <= k) && i <= 7)) || (((53 <= k && 10 <= m && j <= 3) && i <= 5) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 18 <= k) && i <= 1) && 10 <= n)) || (91 <= k && i + 1 <= n && (10 <= m && j <= 1) && 10 <= n)) || ((((10 <= m && j <= 3) && 63 <= k) && i <= 6) && 10 <= n)) || ((80 <= k && i <= 8) && (10 <= m && j <= 0) && 10 <= n)) || ((((i <= 3 && j <= 8) && 10 <= m) && 38 <= k) && 10 <= n)) || ((((10 <= m && j <= 2) && 62 <= k) && i <= 6) && 10 <= n)) || ((((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) && 10 <= m && j <= 4) && 94 <= 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, 220.3s OverallTime, 20 OverallIterations, 110 TraceHistogramMax, 8.9s AutomataDifference, 0.0s DeadEndRemovalTime, 185.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 777 SDtfs, 1191 SDslu, 3007 SDs, 0 SdLazy, 1069 SolverSat, 241 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6541 GetRequests, 5988 SyntacticMatches, 116 SemanticMatches, 437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5160 ImplicationChecksByTransitivity, 16.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=264occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 192 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 27 PreInvPairs, 5144 NumberOfFragments, 1975 HoareAnnotationTreeSize, 27 FomulaSimplifications, 6253508 FormulaSimplificationTreeSizeReduction, 89.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 169524 FormulaSimplificationTreeSizeReductionInter, 96.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 17.9s InterpolantComputationTime, 4998 NumberOfCodeBlocks, 4864 NumberOfCodeBlocksAsserted, 322 NumberOfCheckSat, 8042 ConstructedInterpolants, 0 QuantifiedInterpolants, 6091326 SizeOfPredicates, 92 NumberOfNonLiveVariables, 8092 ConjunctsInSsa, 257 ConjunctsInUnsatCore, 84 InterpolantComputations, 4 PerfectInterpolantSequences, 45693/194542 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...