./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-lit/cggmp2005_true-unreach-call_true-termination.c.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c3fbe1c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005_true-unreach-call_true-termination.c.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 6ee0c0bb9185005ad94b7785b09df595a41ce360 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:10:26,397 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:10:26,399 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:10:26,409 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:10:26,410 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:10:26,411 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:10:26,412 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:10:26,413 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:10:26,415 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:10:26,416 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:10:26,417 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:10:26,417 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:10:26,418 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:10:26,419 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:10:26,420 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:10:26,421 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:10:26,422 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:10:26,424 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:10:26,426 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:10:26,428 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:10:26,429 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:10:26,430 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:10:26,433 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 15:10:26,433 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 15:10:26,433 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 15:10:26,434 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 15:10:26,435 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 15:10:26,436 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 15:10:26,437 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 15:10:26,438 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 15:10:26,439 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 15:10:26,440 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 15:10:26,440 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 15:10:26,440 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 15:10:26,441 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 15:10:26,442 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 15:10:26,443 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 15:10:26,459 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:10:26,459 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:10:26,460 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:10:26,460 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 15:10:26,460 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 15:10:26,460 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 15:10:26,461 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 15:10:26,461 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 15:10:26,462 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 15:10:26,462 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 15:10:26,462 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 15:10:26,462 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:10:26,464 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 15:10:26,464 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:10:26,464 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 15:10:26,465 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:10:26,465 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:10:26,465 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:10:26,465 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:10:26,465 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 15:10:26,465 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:10:26,465 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:10:26,468 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:10:26,468 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:10:26,468 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:10:26,468 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:10:26,468 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:10:26,469 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:10:26,470 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:10:26,470 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:10:26,470 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 15:10:26,470 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:10:26,470 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:10:26,470 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:10:26,472 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 -> 6ee0c0bb9185005ad94b7785b09df595a41ce360 [2018-10-22 15:10:26,528 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:10:26,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:10:26,544 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:10:26,546 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:10:26,546 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:10:26,547 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_true-unreach-call_true-termination.c.i [2018-10-22 15:10:26,605 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9476e1ad0/6cb31b9e8eb949a4bb4e0e74c2ed6f0a/FLAGb7840308d [2018-10-22 15:10:27,106 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:10:27,107 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_true-unreach-call_true-termination.c.i [2018-10-22 15:10:27,114 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9476e1ad0/6cb31b9e8eb949a4bb4e0e74c2ed6f0a/FLAGb7840308d [2018-10-22 15:10:27,128 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9476e1ad0/6cb31b9e8eb949a4bb4e0e74c2ed6f0a [2018-10-22 15:10:27,132 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:10:27,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 15:10:27,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:10:27,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:10:27,142 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:10:27,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:10:27" (1/1) ... [2018-10-22 15:10:27,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c20a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27, skipping insertion in model container [2018-10-22 15:10:27,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:10:27" (1/1) ... [2018-10-22 15:10:27,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:10:27,188 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:10:27,384 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:10:27,390 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:10:27,408 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:10:27,425 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:10:27,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27 WrapperNode [2018-10-22 15:10:27,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:10:27,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:10:27,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:10:27,427 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:10:27,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27" (1/1) ... [2018-10-22 15:10:27,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27" (1/1) ... [2018-10-22 15:10:27,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:10:27,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:10:27,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:10:27,449 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:10:27,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27" (1/1) ... [2018-10-22 15:10:27,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27" (1/1) ... [2018-10-22 15:10:27,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27" (1/1) ... [2018-10-22 15:10:27,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27" (1/1) ... [2018-10-22 15:10:27,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27" (1/1) ... [2018-10-22 15:10:27,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27" (1/1) ... [2018-10-22 15:10:27,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27" (1/1) ... [2018-10-22 15:10:27,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:10:27,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:10:27,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:10:27,473 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:10:27,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:10:27,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 15:10:27,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 15:10:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:10:27,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:10:27,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 15:10:27,526 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 15:10:27,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:10:27,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:10:27,757 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:10:27,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:10:27 BoogieIcfgContainer [2018-10-22 15:10:27,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:10:27,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:10:27,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:10:27,763 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:10:27,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:10:27" (1/3) ... [2018-10-22 15:10:27,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef8700a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:10:27, skipping insertion in model container [2018-10-22 15:10:27,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:10:27" (2/3) ... [2018-10-22 15:10:27,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef8700a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:10:27, skipping insertion in model container [2018-10-22 15:10:27,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:10:27" (3/3) ... [2018-10-22 15:10:27,769 INFO L112 eAbstractionObserver]: Analyzing ICFG cggmp2005_true-unreach-call_true-termination.c.i [2018-10-22 15:10:27,779 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:10:27,787 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:10:27,802 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:10:27,837 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:10:27,838 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:10:27,838 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:10:27,838 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:10:27,838 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:10:27,838 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:10:27,838 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:10:27,839 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:10:27,839 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:10:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-22 15:10:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:10:27,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:10:27,866 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:10:27,869 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:10:27,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:10:27,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-10-22 15:10:27,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:10:27,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:27,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:10:27,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:27,927 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:10:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:10:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:27,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:10:27,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:10:27,993 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:10:27,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:10:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:10:28,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:10:28,013 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-22 15:10:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:10:28,038 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-10-22 15:10:28,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:10:28,041 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 15:10:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:10:28,054 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:10:28,055 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 15:10:28,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:10:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 15:10:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-22 15:10:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 15:10:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-22 15:10:28,100 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-22 15:10:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:10:28,100 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-22 15:10:28,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:10:28,101 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-22 15:10:28,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:10:28,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:10:28,102 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:10:28,103 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:10:28,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:10:28,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-10-22 15:10:28,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:10:28,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:28,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:10:28,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:28,106 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:10:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:10:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:28,224 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:10:28,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:10:28,224 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:10:28,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:10:28,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:10:28,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:10:28,227 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-10-22 15:10:28,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:10:28,284 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-22 15:10:28,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:10:28,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-22 15:10:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:10:28,286 INFO L225 Difference]: With dead ends: 19 [2018-10-22 15:10:28,287 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 15:10:28,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:10:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 15:10:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 15:10:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:10:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 15:10:28,297 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-22 15:10:28,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:10:28,297 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 15:10:28,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:10:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 15:10:28,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:10:28,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:10:28,303 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:10:28,305 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:10:28,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:10:28,306 INFO L82 PathProgramCache]: Analyzing trace with hash -661808769, now seen corresponding path program 1 times [2018-10-22 15:10:28,306 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:10:28,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:28,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:10:28,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:28,312 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:10:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:10:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:28,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:28,498 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:10:28,499 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-22 15:10:28,502 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [21], [24], [26], [32], [33], [34], [36] [2018-10-22 15:10:28,560 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:10:28,564 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:10:28,791 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:10:28,792 INFO L272 AbstractInterpreter]: Visited 12 different actions 38 times. Merged at 3 different actions 14 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-10-22 15:10:28,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:10:28,839 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:10:28,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:28,840 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:10:28,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:10:28,860 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:10:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:10:28,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:10:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:28,994 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:10:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:29,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:29,122 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:10:29,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:10:29,154 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:10:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:10:29,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:10:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:29,181 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:10:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:29,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:10:29,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 8 [2018-10-22 15:10:29,206 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:10:29,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:10:29,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:10:29,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:10:29,208 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-22 15:10:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:10:29,251 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-22 15:10:29,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:10:29,252 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-22 15:10:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:10:29,253 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:10:29,254 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:10:29,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:10:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:10:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 15:10:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:10:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 15:10:29,260 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-22 15:10:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:10:29,260 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 15:10:29,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:10:29,260 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 15:10:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:10:29,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:10:29,262 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:10:29,263 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:10:29,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:10:29,263 INFO L82 PathProgramCache]: Analyzing trace with hash 622365701, now seen corresponding path program 2 times [2018-10-22 15:10:29,263 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:10:29,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:29,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:10:29,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:29,266 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:10:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:10:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:29,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:29,424 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:10:29,425 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:10:29,425 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:10:29,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:29,425 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:10:29,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:10:29,435 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:10:29,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:10:29,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:10:29,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:10:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:29,729 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:10:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:29,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:29,832 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:10:29,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:10:29,848 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:10:29,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:10:29,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:10:29,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:10:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:29,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:10:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:29,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:10:29,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 9 [2018-10-22 15:10:29,919 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:10:29,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:10:29,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:10:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:10:29,921 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2018-10-22 15:10:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:10:29,960 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-22 15:10:29,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:10:29,961 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-22 15:10:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:10:29,963 INFO L225 Difference]: With dead ends: 23 [2018-10-22 15:10:29,963 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:10:29,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:10:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:10:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 15:10:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:10:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 15:10:29,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-22 15:10:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:10:29,969 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 15:10:29,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:10:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 15:10:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 15:10:29,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:10:29,970 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:10:29,970 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:10:29,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:10:29,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2058417419, now seen corresponding path program 3 times [2018-10-22 15:10:29,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:10:29,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:29,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:10:29,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:29,972 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:10:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:10:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:30,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:30,071 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:10:30,071 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:10:30,071 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:10:30,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:30,071 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:10:30,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:10:30,082 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:10:30,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:10:30,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:10:30,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:10:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:30,279 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:10:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:30,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:30,349 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:10:30,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:10:30,366 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:10:30,390 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:10:30,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:10:30,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:10:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:30,404 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:10:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:30,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:10:30,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-10-22 15:10:30,524 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:10:30,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:10:30,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:10:30,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:10:30,525 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2018-10-22 15:10:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:10:30,583 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-22 15:10:30,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:10:30,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-22 15:10:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:10:30,586 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:10:30,586 INFO L226 Difference]: Without dead ends: 20 [2018-10-22 15:10:30,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:10:30,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-22 15:10:30,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-22 15:10:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 15:10:30,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-22 15:10:30,591 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-22 15:10:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:10:30,592 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-22 15:10:30,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:10:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-22 15:10:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:10:30,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:10:30,593 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:10:30,593 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:10:30,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:10:30,594 INFO L82 PathProgramCache]: Analyzing trace with hash -875350895, now seen corresponding path program 4 times [2018-10-22 15:10:30,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:10:30,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:30,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:10:30,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:30,595 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:10:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:10:31,108 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-22 15:10:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:31,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:31,133 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:10:31,134 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:10:31,134 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:10:31,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:31,134 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:10:31,143 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:10:31,143 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:10:31,161 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:10:31,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:10:31,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:10:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:31,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:10:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:31,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:10:31,306 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:10:31,323 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:10:31,323 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:10:31,340 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:10:31,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:10:31,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:10:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:31,386 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:10:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:31,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:10:31,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 11 [2018-10-22 15:10:31,433 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:10:31,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:10:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:10:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:10:31,434 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2018-10-22 15:10:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:10:31,569 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-22 15:10:31,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:10:31,570 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-10-22 15:10:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:10:31,571 INFO L225 Difference]: With dead ends: 27 [2018-10-22 15:10:31,571 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 15:10:31,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:10:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 15:10:31,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-22 15:10:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 15:10:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-22 15:10:31,577 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-22 15:10:31,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:10:31,577 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-22 15:10:31,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:10:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-22 15:10:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 15:10:31,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:10:31,580 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:10:31,580 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:10:31,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:10:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1566812823, now seen corresponding path program 5 times [2018-10-22 15:10:31,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:10:31,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:31,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:10:31,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:10:31,582 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:10:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:10:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:10:31,670 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:10:31,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-22 15:10:31,671 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:10:31,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:10:31,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:10:31,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:10:31,672 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2018-10-22 15:10:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:10:31,688 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-22 15:10:31,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:10:31,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-10-22 15:10:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:10:31,690 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:10:31,691 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 15:10:31,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:10:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 15:10:31,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 15:10:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 15:10:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 15:10:31,692 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-10-22 15:10:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:10:31,693 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 15:10:31,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:10:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 15:10:31,693 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 15:10:31,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 15:10:31,899 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2018-10-22 15:10:31,921 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 15:10:31,921 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:10:31,921 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:10:31,921 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 15:10:31,922 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 15:10:31,922 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 15:10:31,922 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2018-10-22 15:10:31,922 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2018-10-22 15:10:31,922 INFO L425 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-10-22 15:10:31,922 INFO L425 ceAbstractionStarter]: For program point L14-1(lines 14 17) no Hoare annotation was computed. [2018-10-22 15:10:31,922 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2018-10-22 15:10:31,923 INFO L421 ceAbstractionStarter]: At program point L14-3(lines 14 17) the Hoare annotation is: (or (and (<= 8 main_~j~0) (<= main_~j~0 (+ main_~i~0 3)) (<= main_~i~0 5)) (and (<= 6 main_~j~0) (<= (+ main_~j~0 3) main_~i~0) (<= main_~j~0 6)) (and (<= main_~j~0 (+ main_~i~0 9)) (<= main_~i~0 1) (<= 10 main_~j~0)) (and (<= 7 main_~j~0) (<= main_~j~0 main_~i~0) (<= main_~i~0 7)) (and (<= main_~i~0 3) (<= main_~j~0 (+ main_~i~0 6)) (<= 9 main_~j~0))) [2018-10-22 15:10:31,923 INFO L421 ceAbstractionStarter]: At program point L14-4(lines 14 17) the Hoare annotation is: (and (<= 6 main_~j~0) (<= main_~j~0 6)) [2018-10-22 15:10:31,923 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 15:10:31,923 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 15:10:31,923 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 15:10:31,923 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 15:10:31,923 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 15:10:31,924 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 15:10:31,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:10:31 BoogieIcfgContainer [2018-10-22 15:10:31,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:10:31,939 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 15:10:31,939 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 15:10:31,939 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 15:10:31,940 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:10:27" (3/4) ... [2018-10-22 15:10:31,944 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 15:10:31,949 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 15:10:31,950 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 15:10:31,950 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 15:10:31,954 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-10-22 15:10:31,954 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-22 15:10:31,954 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 15:10:31,999 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 15:10:31,999 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 15:10:32,000 INFO L168 Benchmark]: Toolchain (without parser) took 4866.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 954.5 MB in the beginning and 915.7 MB in the end (delta: 38.8 MB). Peak memory consumption was 186.6 MB. Max. memory is 11.5 GB. [2018-10-22 15:10:32,001 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:10:32,002 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.93 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 942.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-10-22 15:10:32,003 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.29 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 15:10:32,003 INFO L168 Benchmark]: Boogie Preprocessor took 23.23 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 15:10:32,004 INFO L168 Benchmark]: RCFGBuilder took 285.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -184.2 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2018-10-22 15:10:32,007 INFO L168 Benchmark]: TraceAbstraction took 4179.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 922.5 MB in the end (delta: 204.1 MB). Peak memory consumption was 204.1 MB. Max. memory is 11.5 GB. [2018-10-22 15:10:32,008 INFO L168 Benchmark]: Witness Printer took 59.95 ms. Allocated memory is still 1.2 GB. Free memory was 922.5 MB in the beginning and 915.7 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-10-22 15:10:32,012 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 290.93 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 942.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.29 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 23.23 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 285.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -184.2 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4179.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 922.5 MB in the end (delta: 204.1 MB). Peak memory consumption was 204.1 MB. Max. memory is 11.5 GB. * Witness Printer took 59.95 ms. Allocated memory is still 1.2 GB. Free memory was 922.5 MB in the beginning and 915.7 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((8 <= j && j <= i + 3) && i <= 5) || ((6 <= j && j + 3 <= i) && j <= 6)) || ((j <= i + 9 && i <= 1) && 10 <= j)) || ((7 <= j && j <= i) && i <= 7)) || ((i <= 3 && j <= i + 6) && 9 <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 4.0s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 86 SDtfs, 1 SDslu, 206 SDs, 0 SdLazy, 98 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 232 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 19 NumberOfFragments, 71 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 234 NumberOfCodeBlocks, 234 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 339 ConstructedInterpolants, 0 QuantifiedInterpolants, 18193 SizeOfPredicates, 16 NumberOfNonLiveVariables, 320 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 30/230 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...