./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-invgen/nested6_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c3fbe1c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loop-invgen/nested6_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 934ee9c856a834ce808d29dea79c6912619f897f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 15:09:28,430 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:09:28,432 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:09:28,449 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:09:28,449 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:09:28,450 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:09:28,452 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:09:28,455 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:09:28,460 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:09:28,461 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:09:28,462 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:09:28,465 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:09:28,466 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:09:28,467 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:09:28,468 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:09:28,469 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:09:28,470 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:09:28,478 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:09:28,482 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:09:28,484 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:09:28,486 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:09:28,488 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:09:28,494 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 15:09:28,494 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 15:09:28,494 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 15:09:28,495 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 15:09:28,497 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 15:09:28,497 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 15:09:28,501 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 15:09:28,502 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 15:09:28,503 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 15:09:28,504 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 15:09:28,506 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 15:09:28,507 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 15:09:28,508 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 15:09:28,509 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 15:09:28,509 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 15:09:28,539 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:09:28,539 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:09:28,540 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:09:28,540 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 15:09:28,540 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 15:09:28,540 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 15:09:28,540 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 15:09:28,541 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 15:09:28,541 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 15:09:28,541 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 15:09:28,541 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 15:09:28,542 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:09:28,542 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 15:09:28,542 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:09:28,542 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 15:09:28,542 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:09:28,543 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:09:28,543 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:09:28,543 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:09:28,543 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 15:09:28,543 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:09:28,543 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:09:28,544 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:09:28,544 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:09:28,544 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:09:28,544 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:09:28,544 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:09:28,545 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:09:28,545 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:09:28,545 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:09:28,545 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 15:09:28,545 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:09:28,545 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:09:28,546 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:09:28,546 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 -> 934ee9c856a834ce808d29dea79c6912619f897f [2018-10-22 15:09:28,599 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:09:28,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:09:28,619 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:09:28,621 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:09:28,622 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:09:28,622 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-10-22 15:09:28,686 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e1250982/dd641a5606e94a38a66a43c96e710ad4/FLAG8fdd7ae19 [2018-10-22 15:09:29,167 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:09:29,168 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-10-22 15:09:29,175 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e1250982/dd641a5606e94a38a66a43c96e710ad4/FLAG8fdd7ae19 [2018-10-22 15:09:29,192 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e1250982/dd641a5606e94a38a66a43c96e710ad4 [2018-10-22 15:09:29,199 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:09:29,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 15:09:29,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:09:29,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:09:29,205 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:09:29,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:09:29" (1/1) ... [2018-10-22 15:09:29,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677dc657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29, skipping insertion in model container [2018-10-22 15:09:29,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:09:29" (1/1) ... [2018-10-22 15:09:29,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:09:29,240 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:09:29,441 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:09:29,446 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:09:29,470 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:09:29,491 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:09:29,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29 WrapperNode [2018-10-22 15:09:29,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:09:29,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:09:29,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:09:29,493 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:09:29,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29" (1/1) ... [2018-10-22 15:09:29,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29" (1/1) ... [2018-10-22 15:09:29,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:09:29,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:09:29,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:09:29,517 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:09:29,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29" (1/1) ... [2018-10-22 15:09:29,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29" (1/1) ... [2018-10-22 15:09:29,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29" (1/1) ... [2018-10-22 15:09:29,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29" (1/1) ... [2018-10-22 15:09:29,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29" (1/1) ... [2018-10-22 15:09:29,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29" (1/1) ... [2018-10-22 15:09:29,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29" (1/1) ... [2018-10-22 15:09:29,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:09:29,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:09:29,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:09:29,561 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:09:29,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29" (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 15:09:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 15:09:29,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 15:09:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:09:29,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:09:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 15:09:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 15:09:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:09:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:09:30,181 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:09:30,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:09:30 BoogieIcfgContainer [2018-10-22 15:09:30,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:09:30,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:09:30,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:09:30,194 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:09:30,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:09:29" (1/3) ... [2018-10-22 15:09:30,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc22012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:09:30, skipping insertion in model container [2018-10-22 15:09:30,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:09:29" (2/3) ... [2018-10-22 15:09:30,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc22012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:09:30, skipping insertion in model container [2018-10-22 15:09:30,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:09:30" (3/3) ... [2018-10-22 15:09:30,203 INFO L112 eAbstractionObserver]: Analyzing ICFG nested6_true-unreach-call_true-termination.i [2018-10-22 15:09:30,212 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:09:30,220 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:09:30,233 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:09:30,268 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:09:30,268 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:09:30,269 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:09:30,269 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:09:30,269 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:09:30,269 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:09:30,269 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:09:30,269 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:09:30,269 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:09:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-10-22 15:09:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 15:09:30,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:09:30,297 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:09:30,299 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:09:30,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:30,305 INFO L82 PathProgramCache]: Analyzing trace with hash 416534784, now seen corresponding path program 1 times [2018-10-22 15:09:30,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:09:30,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:30,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:30,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:30,354 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:09:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:30,525 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 15:09:30,528 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:09:30,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:09:30,529 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:09:30,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:09:30,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:09:30,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:09:30,552 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2018-10-22 15:09:30,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:09:30,742 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2018-10-22 15:09:30,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:09:30,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-10-22 15:09:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:09:30,753 INFO L225 Difference]: With dead ends: 63 [2018-10-22 15:09:30,754 INFO L226 Difference]: Without dead ends: 31 [2018-10-22 15:09:30,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:09:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-22 15:09:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-22 15:09:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-22 15:09:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2018-10-22 15:09:30,802 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2018-10-22 15:09:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:09:30,803 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-10-22 15:09:30,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:09:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2018-10-22 15:09:30,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:09:30,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:09:30,804 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:09:30,805 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:09:30,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:30,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1670630326, now seen corresponding path program 1 times [2018-10-22 15:09:30,806 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:09:30,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:30,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:30,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:30,807 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:09:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:30,989 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 15:09:30,989 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:09:30,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-22 15:09:30,994 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:09:30,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:09:30,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:09:30,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:09:30,996 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2018-10-22 15:09:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:09:31,443 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-10-22 15:09:31,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:09:31,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-10-22 15:09:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:09:31,448 INFO L225 Difference]: With dead ends: 44 [2018-10-22 15:09:31,448 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:09:31,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:09:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:09:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2018-10-22 15:09:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 15:09:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-10-22 15:09:31,459 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2018-10-22 15:09:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:09:31,459 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-10-22 15:09:31,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:09:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-10-22 15:09:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:09:31,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:09:31,461 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:09:31,461 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:09:31,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash 767827044, now seen corresponding path program 1 times [2018-10-22 15:09:31,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:09:31,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:31,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:31,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:31,463 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:09:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:09:31,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:31,680 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:09:31,682 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-10-22 15:09:31,684 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [33], [53], [67], [70], [72], [75], [77], [78], [79], [80], [84], [85], [86] [2018-10-22 15:09:31,732 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:09:31,732 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:09:31,913 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 15:09:31,915 INFO L272 AbstractInterpreter]: Visited 20 different actions 24 times. Never merged. Never widened. Never found a fixpoint. Largest state had 7 variables. [2018-10-22 15:09:31,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:31,947 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 15:09:32,088 INFO L232 lantSequenceWeakener]: Weakened 9 states. On average, predicates are now at 54.44% of their original sizes. [2018-10-22 15:09:32,089 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 15:09:32,595 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 15:09:32,596 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:09:32,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2018-10-22 15:09:32,596 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:09:32,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:09:32,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:09:32,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:09:32,598 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2018-10-22 15:09:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:09:34,400 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2018-10-22 15:09:34,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:09:34,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-10-22 15:09:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:09:34,404 INFO L225 Difference]: With dead ends: 107 [2018-10-22 15:09:34,404 INFO L226 Difference]: Without dead ends: 80 [2018-10-22 15:09:34,405 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:09:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-22 15:09:34,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-10-22 15:09:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-22 15:09:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-10-22 15:09:34,425 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 22 [2018-10-22 15:09:34,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:09:34,425 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-10-22 15:09:34,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:09:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-10-22 15:09:34,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:09:34,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:09:34,427 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:09:34,428 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:09:34,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:34,428 INFO L82 PathProgramCache]: Analyzing trace with hash -676333797, now seen corresponding path program 1 times [2018-10-22 15:09:34,428 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:09:34,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:34,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:34,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:34,430 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:09:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:09:34,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:34,562 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:09:34,562 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-10-22 15:09:34,563 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [33], [36], [40], [43], [53], [57], [67], [70], [72], [75], [77], [78], [79], [80], [84], [85], [86] [2018-10-22 15:09:34,565 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:09:34,565 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:09:34,585 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 15:09:34,585 INFO L272 AbstractInterpreter]: Visited 23 different actions 27 times. Never merged. Never widened. Never found a fixpoint. Largest state had 8 variables. [2018-10-22 15:09:34,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:34,587 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 15:09:34,631 INFO L232 lantSequenceWeakener]: Weakened 17 states. On average, predicates are now at 46.86% of their original sizes. [2018-10-22 15:09:34,632 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 15:09:34,992 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 15:09:34,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:09:34,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2018-10-22 15:09:34,993 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:09:34,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:09:34,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:09:34,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:09:34,994 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 14 states. [2018-10-22 15:09:37,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:09:37,001 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2018-10-22 15:09:37,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:09:37,001 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2018-10-22 15:09:37,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:09:37,004 INFO L225 Difference]: With dead ends: 139 [2018-10-22 15:09:37,004 INFO L226 Difference]: Without dead ends: 112 [2018-10-22 15:09:37,005 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:09:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-22 15:09:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 59. [2018-10-22 15:09:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-22 15:09:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2018-10-22 15:09:37,025 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 28 [2018-10-22 15:09:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:09:37,026 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2018-10-22 15:09:37,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:09:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2018-10-22 15:09:37,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-22 15:09:37,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:09:37,028 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:09:37,028 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:09:37,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash 542199398, now seen corresponding path program 1 times [2018-10-22 15:09:37,030 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:09:37,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:37,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:37,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:37,032 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:09:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-22 15:09:37,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:37,134 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:09:37,135 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-10-22 15:09:37,135 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [33], [36], [40], [43], [45], [48], [53], [57], [67], [70], [72], [75], [77], [78], [79], [80], [82], [83], [84], [85], [86] [2018-10-22 15:09:37,138 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:09:37,138 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:09:37,301 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:09:37,302 INFO L272 AbstractInterpreter]: Visited 29 different actions 313 times. Merged at 11 different actions 108 times. Widened at 3 different actions 16 times. Found 15 fixpoints after 4 different actions. Largest state had 9 variables. [2018-10-22 15:09:37,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:37,328 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:09:37,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:37,328 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 15:09:37,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:37,341 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:09:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:37,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:09:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:09:37,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:09:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-22 15:09:37,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:37,626 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 15:09:37,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:37,648 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:09:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:37,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:09:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:09:37,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:09:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-22 15:09:37,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:09:37,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 6, 6] total 11 [2018-10-22 15:09:37,799 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:09:37,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:09:37,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:09:37,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:09:37,801 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 11 states. [2018-10-22 15:09:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:09:38,458 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2018-10-22 15:09:38,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:09:38,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2018-10-22 15:09:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:09:38,465 INFO L225 Difference]: With dead ends: 113 [2018-10-22 15:09:38,465 INFO L226 Difference]: Without dead ends: 86 [2018-10-22 15:09:38,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:09:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-22 15:09:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2018-10-22 15:09:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-22 15:09:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2018-10-22 15:09:38,486 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 36 [2018-10-22 15:09:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:09:38,486 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2018-10-22 15:09:38,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:09:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2018-10-22 15:09:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-22 15:09:38,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:09:38,489 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:09:38,489 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:09:38,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:38,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1487760091, now seen corresponding path program 1 times [2018-10-22 15:09:38,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:09:38,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:38,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:38,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:38,490 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:09:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 15:09:38,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:38,668 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:09:38,669 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 48 with the following transitions: [2018-10-22 15:09:38,669 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [31], [33], [36], [40], [43], [53], [57], [61], [67], [70], [72], [75], [77], [78], [79], [80], [84], [85], [86], [87] [2018-10-22 15:09:38,671 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:09:38,671 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:09:38,808 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 15:09:38,808 INFO L272 AbstractInterpreter]: Visited 27 different actions 258 times. Merged at 12 different actions 107 times. Widened at 4 different actions 17 times. Found 11 fixpoints after 3 different actions. Largest state had 9 variables. [2018-10-22 15:09:38,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:38,845 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 15:09:38,900 INFO L232 lantSequenceWeakener]: Weakened 20 states. On average, predicates are now at 55.5% of their original sizes. [2018-10-22 15:09:38,900 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 15:09:39,725 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 15:09:39,726 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:09:39,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [13] total 30 [2018-10-22 15:09:39,726 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:09:39,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:09:39,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:09:39,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:09:39,728 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 19 states. [2018-10-22 15:09:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:09:41,932 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2018-10-22 15:09:41,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:09:41,932 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2018-10-22 15:09:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:09:41,934 INFO L225 Difference]: With dead ends: 162 [2018-10-22 15:09:41,934 INFO L226 Difference]: Without dead ends: 113 [2018-10-22 15:09:41,935 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:09:41,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-22 15:09:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2018-10-22 15:09:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-22 15:09:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2018-10-22 15:09:41,959 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 47 [2018-10-22 15:09:41,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:09:41,960 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2018-10-22 15:09:41,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:09:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2018-10-22 15:09:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:09:41,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:09:41,962 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:09:41,962 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:09:41,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1746865647, now seen corresponding path program 1 times [2018-10-22 15:09:41,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:09:41,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:41,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:41,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:41,964 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:09:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-10-22 15:09:42,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:42,086 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:09:42,087 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 53 with the following transitions: [2018-10-22 15:09:42,087 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [31], [33], [36], [40], [43], [45], [48], [53], [57], [61], [67], [70], [72], [75], [77], [78], [79], [80], [82], [83], [84], [85], [86] [2018-10-22 15:09:42,088 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:09:42,089 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:09:42,248 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:09:42,248 INFO L272 AbstractInterpreter]: Visited 31 different actions 427 times. Merged at 15 different actions 163 times. Widened at 5 different actions 26 times. Found 30 fixpoints after 7 different actions. Largest state had 10 variables. [2018-10-22 15:09:42,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:42,283 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:09:42,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:42,283 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 15:09:42,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:42,299 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:09:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:42,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:09:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-22 15:09:42,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:09:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-22 15:09:42,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:42,827 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 15:09:42,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:42,843 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:09:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:42,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:09:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-22 15:09:42,971 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:09:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-22 15:09:43,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:09:43,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 8, 8] total 14 [2018-10-22 15:09:43,070 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:09:43,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:09:43,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:09:43,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:09:43,071 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand 12 states. [2018-10-22 15:09:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:09:43,894 INFO L93 Difference]: Finished difference Result 255 states and 327 transitions. [2018-10-22 15:09:43,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:09:43,897 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-22 15:09:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:09:43,901 INFO L225 Difference]: With dead ends: 255 [2018-10-22 15:09:43,901 INFO L226 Difference]: Without dead ends: 161 [2018-10-22 15:09:43,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:09:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-22 15:09:43,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2018-10-22 15:09:43,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-22 15:09:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 139 transitions. [2018-10-22 15:09:43,965 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 139 transitions. Word has length 52 [2018-10-22 15:09:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:09:43,970 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 139 transitions. [2018-10-22 15:09:43,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:09:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 139 transitions. [2018-10-22 15:09:43,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-22 15:09:43,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:09:43,977 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:09:43,977 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:09:43,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:43,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1720427988, now seen corresponding path program 1 times [2018-10-22 15:09:43,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:09:43,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:43,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:43,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:43,979 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:09:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-22 15:09:44,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:44,175 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:09:44,175 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 67 with the following transitions: [2018-10-22 15:09:44,175 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [31], [33], [36], [40], [43], [45], [48], [53], [57], [61], [67], [70], [72], [75], [77], [78], [79], [80], [82], [83], [84], [85], [86], [87] [2018-10-22 15:09:44,177 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:09:44,177 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:09:44,335 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:09:44,336 INFO L272 AbstractInterpreter]: Visited 32 different actions 425 times. Merged at 16 different actions 158 times. Widened at 5 different actions 23 times. Found 39 fixpoints after 9 different actions. Largest state had 10 variables. [2018-10-22 15:09:44,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:44,375 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:09:44,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:44,375 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:09:44,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:44,388 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:09:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:44,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:09:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-10-22 15:09:44,831 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:09:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-22 15:09:45,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:45,259 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 15:09:45,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:45,277 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:09:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:45,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:09:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-10-22 15:09:46,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:09:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-22 15:09:46,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:09:46,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 19 [2018-10-22 15:09:46,679 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:09:46,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:09:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:09:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=290, Unknown=2, NotChecked=0, Total=342 [2018-10-22 15:09:46,681 INFO L87 Difference]: Start difference. First operand 113 states and 139 transitions. Second operand 16 states. [2018-10-22 15:09:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:09:49,703 INFO L93 Difference]: Finished difference Result 591 states and 784 transitions. [2018-10-22 15:09:49,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-22 15:09:49,707 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2018-10-22 15:09:49,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:09:49,715 INFO L225 Difference]: With dead ends: 591 [2018-10-22 15:09:49,715 INFO L226 Difference]: Without dead ends: 264 [2018-10-22 15:09:49,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 256 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=872, Invalid=4382, Unknown=2, NotChecked=0, Total=5256 [2018-10-22 15:09:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-22 15:09:49,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 189. [2018-10-22 15:09:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-22 15:09:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 240 transitions. [2018-10-22 15:09:49,808 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 240 transitions. Word has length 66 [2018-10-22 15:09:49,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:09:49,809 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 240 transitions. [2018-10-22 15:09:49,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:09:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 240 transitions. [2018-10-22 15:09:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-22 15:09:49,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:09:49,820 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 7, 6, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:09:49,820 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:09:49,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:09:49,821 INFO L82 PathProgramCache]: Analyzing trace with hash -355759697, now seen corresponding path program 2 times [2018-10-22 15:09:49,821 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:09:49,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:49,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:09:49,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:09:49,823 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:09:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:09:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 70 proven. 59 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2018-10-22 15:09:50,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:50,002 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 15:09:50,002 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:09:50,002 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:09:50,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:50,002 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 15:09:50,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:09:50,011 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:09:50,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:09:50,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:09:50,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:09:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 179 proven. 48 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-10-22 15:09:50,509 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:09:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 101 proven. 48 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-10-22 15:09:51,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:09:51,200 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 15:09:51,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:09:51,216 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:09:51,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:09:51,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:09:51,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:09:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 179 proven. 46 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-22 15:09:53,583 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:09:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 101 proven. 46 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2018-10-22 15:09:53,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 15:09:53,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11, 10, 10] total 23 [2018-10-22 15:09:53,723 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:09:53,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:09:53,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:09:53,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=435, Unknown=5, NotChecked=0, Total=506 [2018-10-22 15:09:53,728 INFO L87 Difference]: Start difference. First operand 189 states and 240 transitions. Second operand 17 states. [2018-10-22 15:09:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:09:55,552 INFO L93 Difference]: Finished difference Result 437 states and 575 transitions. [2018-10-22 15:09:55,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:09:55,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 108 [2018-10-22 15:09:55,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:09:55,554 INFO L225 Difference]: With dead ends: 437 [2018-10-22 15:09:55,554 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 15:09:55,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 407 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=560, Invalid=2857, Unknown=5, NotChecked=0, Total=3422 [2018-10-22 15:09:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 15:09:55,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 15:09:55,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 15:09:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 15:09:55,558 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2018-10-22 15:09:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:09:55,558 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 15:09:55,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:09:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 15:09:55,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 15:09:55,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 15:09:55,682 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:55,935 WARN L179 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 165 [2018-10-22 15:09:55,975 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:55,992 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:56,320 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:56,418 WARN L179 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 200 [2018-10-22 15:09:56,428 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:56,432 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:56,437 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:56,556 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:56,793 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:56,975 WARN L179 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 198 [2018-10-22 15:09:57,044 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:57,048 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:57,572 WARN L179 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 195 [2018-10-22 15:09:57,613 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:57,626 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:57,636 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:57,711 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 15:09:57,917 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 165 [2018-10-22 15:09:59,668 WARN L179 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 161 DAG size of output: 26 [2018-10-22 15:10:03,283 WARN L179 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 197 DAG size of output: 38 [2018-10-22 15:10:05,177 WARN L179 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 197 DAG size of output: 26 [2018-10-22 15:10:06,906 WARN L179 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 194 DAG size of output: 26 [2018-10-22 15:10:09,325 WARN L179 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 116 DAG size of output: 31 [2018-10-22 15:10:10,236 WARN L179 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 26 [2018-10-22 15:10:10,240 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 15:10:10,240 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:10:10,240 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:10:10,240 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 15:10:10,240 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 15:10:10,241 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 15:10:10,241 INFO L421 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (and (let ((.cse1 (* 2 main_~n~0))) (and (<= .cse1 1999998) (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0)) (<= 0 (+ .cse1 4294967296)))) (<= main_~k~0 main_~n~0)))) (or (and .cse0 (<= main_~j~0 main_~i~0)) (and .cse0 (<= (+ main_~j~0 1) main_~n~0)))) [2018-10-22 15:10:10,241 INFO L421 ceAbstractionStarter]: At program point L27-1(line 27) the Hoare annotation is: (let ((.cse0 (and (let ((.cse1 (* 2 main_~n~0))) (and (<= .cse1 1999998) (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0)) (<= 0 (+ .cse1 4294967296)))) (<= main_~k~0 main_~n~0)))) (or (and .cse0 (<= main_~j~0 main_~i~0)) (and .cse0 (<= (+ main_~j~0 1) main_~n~0)))) [2018-10-22 15:10:10,241 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 34) no Hoare annotation was computed. [2018-10-22 15:10:10,241 INFO L421 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (and (let ((.cse1 (* 2 main_~i~0)) (.cse2 (* 2 main_~n~0))) (and (<= .cse1 main_~j~0) (<= .cse2 1999998) (<= .cse1 main_~k~0) (<= 0 (+ .cse2 4294967296)))) (<= (+ main_~k~0 1) main_~n~0)))) (or (and .cse0 (<= (+ main_~j~0 1) main_~n~0)) (and (<= main_~j~0 main_~i~0) .cse0))) [2018-10-22 15:10:10,241 INFO L425 ceAbstractionStarter]: For program point L23-1(lines 22 24) no Hoare annotation was computed. [2018-10-22 15:10:10,241 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 31) no Hoare annotation was computed. [2018-10-22 15:10:10,241 INFO L425 ceAbstractionStarter]: For program point L19-3(lines 19 31) no Hoare annotation was computed. [2018-10-22 15:10:10,242 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 18) no Hoare annotation was computed. [2018-10-22 15:10:10,242 INFO L421 ceAbstractionStarter]: At program point L19-4(lines 19 31) the Hoare annotation is: (let ((.cse6 (* 2 main_~n~0))) (let ((.cse4 (<= main_~k~0 main_~n~0)) (.cse5 (* 2 main_~i~0)) (.cse0 (<= .cse6 1999998)) (.cse1 (<= 0 (+ .cse6 4294967296))) (.cse2 (<= main_~n~0 main_~k~0)) (.cse3 (<= main_~n~0 main_~j~0))) (or (and .cse0 (<= main_~j~0 main_~i~0) .cse1 .cse2 .cse3) (and .cse2 (<= main_~n~0 (+ main_~i~0 999999)) .cse1 .cse4 (= main_~i~0 0)) (and .cse0 (<= main_~j~0 .cse5) .cse1 .cse2 .cse3) (and .cse0 .cse1 .cse4 .cse2 .cse3) (and (<= main_~k~0 (+ .cse5 1)) .cse0 .cse1 .cse2 .cse3)))) [2018-10-22 15:10:10,242 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 18) no Hoare annotation was computed. [2018-10-22 15:10:10,242 INFO L428 ceAbstractionStarter]: At program point L32(lines 10 34) the Hoare annotation is: true [2018-10-22 15:10:10,242 INFO L425 ceAbstractionStarter]: For program point L28(lines 20 30) no Hoare annotation was computed. [2018-10-22 15:10:10,242 INFO L425 ceAbstractionStarter]: For program point L20-1(lines 20 30) no Hoare annotation was computed. [2018-10-22 15:10:10,242 INFO L421 ceAbstractionStarter]: At program point L20-3(lines 20 30) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0))) (let ((.cse0 (let ((.cse3 (* 2 main_~n~0))) (and (<= .cse3 1999998) (and (<= .cse2 main_~j~0) (<= main_~n~0 main_~k~0)) (<= 0 (+ .cse3 4294967296))))) (.cse1 (<= main_~k~0 main_~j~0))) (or (and .cse0 (<= main_~k~0 main_~n~0)) (and .cse0 (<= main_~j~0 (+ main_~i~0 1)) .cse1) (and (exists ((main_~i~0 Int) (v_main_~i~0_17 Int)) (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 (+ (* 2 v_main_~i~0_17) 2)) (<= (+ v_main_~i~0_17 1) main_~i~0))) .cse0 (<= main_~j~0 .cse2)) (and (<= main_~k~0 (+ .cse2 1)) .cse0 .cse1)))) [2018-10-22 15:10:10,242 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 29) no Hoare annotation was computed. [2018-10-22 15:10:10,243 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 34) no Hoare annotation was computed. [2018-10-22 15:10:10,243 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 34) the Hoare annotation is: true [2018-10-22 15:10:10,243 INFO L425 ceAbstractionStarter]: For program point L22-1(lines 22 24) no Hoare annotation was computed. [2018-10-22 15:10:10,243 INFO L421 ceAbstractionStarter]: At program point L22-3(lines 22 24) the Hoare annotation is: (let ((.cse0 (let ((.cse1 (* 2 main_~i~0)) (.cse2 (* 2 main_~n~0))) (and (<= .cse1 main_~j~0) (<= .cse2 1999998) (<= .cse1 main_~k~0) (<= 0 (+ .cse2 4294967296)))))) (or (and .cse0 (<= main_~j~0 main_~i~0) (<= main_~k~0 main_~j~0)) (and (<= (+ main_~j~0 1) main_~n~0) (and .cse0 (<= main_~k~0 main_~n~0))))) [2018-10-22 15:10:10,243 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-22 15:10:10,243 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 15:10:10,243 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 15:10:10,243 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 15:10:10,243 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 15:10:10,243 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 15:10:10,244 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 15:10:10,249 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-10-22 15:10:10,250 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-10-22 15:10:10,250 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-10-22 15:10:10,251 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-10-22 15:10:10,256 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-10-22 15:10:10,256 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-10-22 15:10:10,257 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-10-22 15:10:10,257 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-10-22 15:10:10,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:10:10 BoogieIcfgContainer [2018-10-22 15:10:10,264 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:10:10,264 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 15:10:10,264 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 15:10:10,265 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 15:10:10,265 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:09:30" (3/4) ... [2018-10-22 15:10:10,269 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 15:10:10,275 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 15:10:10,276 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 15:10:10,276 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 15:10:10,280 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2018-10-22 15:10:10,281 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-10-22 15:10:10,281 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 15:10:10,281 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 15:10:10,312 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) && k <= n) || ((((2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) && j <= i + 1) && k <= j)) || (((\exists main_~i~0 : int, v_main_~i~0_17 : int :: (2 * main_~i~0 <= j && n <= 2 * v_main_~i~0_17 + 2) && v_main_~i~0_17 + 1 <= main_~i~0) && (2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) && j <= 2 * i)) || ((k <= 2 * i + 1 && (2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) && k <= j) [2018-10-22 15:10:10,339 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 15:10:10,339 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 15:10:10,340 INFO L168 Benchmark]: Toolchain (without parser) took 41140.94 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 391.1 MB). Free memory was 946.4 MB in the beginning and 883.5 MB in the end (delta: 63.0 MB). Peak memory consumption was 454.1 MB. Max. memory is 11.5 GB. [2018-10-22 15:10:10,342 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:10:10,342 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.41 ms. Allocated memory is still 1.0 GB. Free memory was 946.4 MB in the beginning and 935.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 15:10:10,343 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.34 ms. Allocated memory is still 1.0 GB. Free memory is still 935.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:10:10,343 INFO L168 Benchmark]: Boogie Preprocessor took 43.25 ms. Allocated memory is still 1.0 GB. Free memory is still 935.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:10:10,343 INFO L168 Benchmark]: RCFGBuilder took 622.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 935.7 MB in the beginning and 1.1 GB in the end (delta: -168.0 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. [2018-10-22 15:10:10,344 INFO L168 Benchmark]: TraceAbstraction took 40080.24 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 263.7 MB). Free memory was 1.1 GB in the beginning and 883.5 MB in the end (delta: 220.3 MB). Peak memory consumption was 527.7 MB. Max. memory is 11.5 GB. [2018-10-22 15:10:10,345 INFO L168 Benchmark]: Witness Printer took 75.14 ms. Allocated memory is still 1.4 GB. Free memory is still 883.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:10:10,349 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 290.41 ms. Allocated memory is still 1.0 GB. Free memory was 946.4 MB in the beginning and 935.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.34 ms. Allocated memory is still 1.0 GB. Free memory is still 935.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 43.25 ms. Allocated memory is still 1.0 GB. Free memory is still 935.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 622.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 935.7 MB in the beginning and 1.1 GB in the end (delta: -168.0 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 40080.24 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 263.7 MB). Free memory was 1.1 GB in the beginning and 883.5 MB in the end (delta: 220.3 MB). Peak memory consumption was 527.7 MB. Max. memory is 11.5 GB. * Witness Printer took 75.14 ms. Allocated memory is still 1.4 GB. Free memory is still 883.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] * 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: 20]: Loop Invariant [2018-10-22 15:10:10,356 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-10-22 15:10:10,357 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-10-22 15:10:10,357 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-10-22 15:10:10,357 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-10-22 15:10:10,358 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-10-22 15:10:10,358 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-10-22 15:10:10,358 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_17,QUANTIFIED] [2018-10-22 15:10:10,358 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] Derived loop invariant: (((((2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) && k <= n) || ((((2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) && j <= i + 1) && k <= j)) || (((\exists main_~i~0 : int, v_main_~i~0_17 : int :: (2 * main_~i~0 <= j && n <= 2 * v_main_~i~0_17 + 2) && v_main_~i~0_17 + 1 <= main_~i~0) && (2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) && j <= 2 * i)) || ((k <= 2 * i + 1 && (2 * n <= 1999998 && 2 * i <= j && n <= k) && 0 <= 2 * n + 4294967296) && k <= j) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((2 * i <= j && 2 * n <= 1999998) && 2 * i <= k) && 0 <= 2 * n + 4294967296) && j <= i) && k <= j) || (j + 1 <= n && (((2 * i <= j && 2 * n <= 1999998) && 2 * i <= k) && 0 <= 2 * n + 4294967296) && k <= n) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (((((((2 * n <= 1999998 && j <= i) && 0 <= 2 * n + 4294967296) && n <= k) && n <= j) || ((((n <= k && n <= i + 999999) && 0 <= 2 * n + 4294967296) && k <= n) && i == 0)) || ((((2 * n <= 1999998 && j <= 2 * i) && 0 <= 2 * n + 4294967296) && n <= k) && n <= j)) || ((((2 * n <= 1999998 && 0 <= 2 * n + 4294967296) && k <= n) && n <= k) && n <= j)) || ((((k <= 2 * i + 1 && 2 * n <= 1999998) && 0 <= 2 * n + 4294967296) && n <= k) && n <= j) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. SAFE Result, 39.9s OverallTime, 9 OverallIterations, 11 TraceHistogramMax, 13.0s AutomataDifference, 0.0s DeadEndRemovalTime, 14.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 306 SDtfs, 824 SDslu, 1450 SDs, 0 SdLazy, 1588 SolverSat, 622 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.4s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 1322 GetRequests, 1059 SyntacticMatches, 36 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3027 ImplicationChecksByTransitivity, 11.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=189occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.0s AbstIntTime, 6 AbstIntIterations, 3 AbstIntStrong, 0.9317164809186083 AbsIntWeakeningRatio, 0.43617021276595747 AbsIntAvgWeakeningVarsNumRemoved, 7.24468085106383 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 231 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 173 PreInvPairs, 411 NumberOfFragments, 520 HoareAnnotationTreeSize, 173 FomulaSimplifications, 725484 FormulaSimplificationTreeSizeReduction, 2.3s HoareSimplificationTime, 12 FomulaSimplificationsInter, 219030 FormulaSimplificationTreeSizeReductionInter, 12.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 919 NumberOfCodeBlocks, 919 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 1418 ConstructedInterpolants, 28 QuantifiedInterpolants, 288298 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1022 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 25 InterpolantComputations, 2 PerfectInterpolantSequences, 2058/2470 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...