java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 15:45:52,643 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 15:45:52,646 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 15:45:52,660 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 15:45:52,660 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 15:45:52,661 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 15:45:52,663 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 15:45:52,664 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 15:45:52,666 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 15:45:52,667 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 15:45:52,668 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 15:45:52,668 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 15:45:52,669 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 15:45:52,671 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 15:45:52,672 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 15:45:52,672 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 15:45:52,673 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 15:45:52,675 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 15:45:52,678 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 15:45:52,679 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 15:45:52,680 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 15:45:52,682 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 15:45:52,684 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 15:45:52,685 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 15:45:52,685 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 15:45:52,686 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 15:45:52,687 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 15:45:52,688 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 15:45:52,689 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 15:45:52,690 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 15:45:52,690 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 15:45:52,691 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 15:45:52,691 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 15:45:52,691 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 15:45:52,692 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 15:45:52,693 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 15:45:52,694 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 15:45:52,709 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 15:45:52,710 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 15:45:52,711 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 15:45:52,711 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 15:45:52,711 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 15:45:52,711 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 15:45:52,711 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 15:45:52,712 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 15:45:52,712 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 15:45:52,712 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 15:45:52,712 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 15:45:52,713 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 15:45:52,713 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 15:45:52,713 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 15:45:52,714 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 15:45:52,714 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 15:45:52,714 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 15:45:52,714 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 15:45:52,714 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 15:45:52,715 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 15:45:52,715 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 15:45:52,715 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 15:45:52,715 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 15:45:52,715 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 15:45:52,716 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 15:45:52,716 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 15:45:52,716 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 15:45:52,716 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 15:45:52,716 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 15:45:52,717 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 15:45:52,717 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 15:45:52,717 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 15:45:52,717 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 15:45:52,764 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 15:45:52,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 15:45:52,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 15:45:52,788 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 15:45:52,789 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 15:45:52,790 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-09-14 15:45:53,139 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5c6bfc66/0b8a81b0e8ec4de89aece14511c5deb6/FLAGc5a7c5ffa [2018-09-14 15:45:53,319 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 15:45:53,320 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-09-14 15:45:53,326 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5c6bfc66/0b8a81b0e8ec4de89aece14511c5deb6/FLAGc5a7c5ffa [2018-09-14 15:45:53,343 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5c6bfc66/0b8a81b0e8ec4de89aece14511c5deb6 [2018-09-14 15:45:53,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 15:45:53,359 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 15:45:53,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 15:45:53,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 15:45:53,367 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 15:45:53,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 03:45:53" (1/1) ... [2018-09-14 15:45:53,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145cdde8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53, skipping insertion in model container [2018-09-14 15:45:53,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 03:45:53" (1/1) ... [2018-09-14 15:45:53,384 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 15:45:53,584 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 15:45:53,610 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 15:45:53,618 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 15:45:53,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53 WrapperNode [2018-09-14 15:45:53,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 15:45:53,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 15:45:53,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 15:45:53,637 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 15:45:53,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53" (1/1) ... [2018-09-14 15:45:53,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53" (1/1) ... [2018-09-14 15:45:53,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 15:45:53,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 15:45:53,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 15:45:53,681 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 15:45:53,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53" (1/1) ... [2018-09-14 15:45:53,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53" (1/1) ... [2018-09-14 15:45:53,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53" (1/1) ... [2018-09-14 15:45:53,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53" (1/1) ... [2018-09-14 15:45:53,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53" (1/1) ... [2018-09-14 15:45:53,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53" (1/1) ... [2018-09-14 15:45:53,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53" (1/1) ... [2018-09-14 15:45:53,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 15:45:53,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 15:45:53,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 15:45:53,710 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 15:45:53,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:45:53,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 15:45:53,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 15:45:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2018-09-14 15:45:53,862 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2018-09-14 15:45:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 15:45:53,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 15:45:53,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 15:45:53,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 15:45:53,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-14 15:45:53,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-14 15:45:54,274 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 15:45:54,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 03:45:54 BoogieIcfgContainer [2018-09-14 15:45:54,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 15:45:54,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 15:45:54,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 15:45:54,280 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 15:45:54,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 03:45:53" (1/3) ... [2018-09-14 15:45:54,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a4e02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 03:45:54, skipping insertion in model container [2018-09-14 15:45:54,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:45:53" (2/3) ... [2018-09-14 15:45:54,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a4e02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 03:45:54, skipping insertion in model container [2018-09-14 15:45:54,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 03:45:54" (3/3) ... [2018-09-14 15:45:54,284 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_sea.ch_true-unreach-call.i [2018-09-14 15:45:54,294 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 15:45:54,304 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 15:45:54,356 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 15:45:54,357 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 15:45:54,357 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 15:45:54,357 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 15:45:54,358 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 15:45:54,358 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 15:45:54,358 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 15:45:54,358 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 15:45:54,358 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 15:45:54,377 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-09-14 15:45:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-14 15:45:54,383 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:45:54,384 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:45:54,385 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:45:54,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1679407704, now seen corresponding path program 1 times [2018-09-14 15:45:54,394 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:45:54,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:45:54,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:45:54,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:45:54,448 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:45:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:45:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:45:54,590 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 15:45:54,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-14 15:45:54,591 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:45:54,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-14 15:45:54,611 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-14 15:45:54,612 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-14 15:45:54,615 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2018-09-14 15:45:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:45:54,640 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2018-09-14 15:45:54,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-14 15:45:54,641 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-09-14 15:45:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:45:54,650 INFO L225 Difference]: With dead ends: 44 [2018-09-14 15:45:54,651 INFO L226 Difference]: Without dead ends: 21 [2018-09-14 15:45:54,656 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-14 15:45:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-14 15:45:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-14 15:45:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-14 15:45:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-14 15:45:54,704 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-09-14 15:45:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:45:54,705 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-14 15:45:54,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-14 15:45:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-14 15:45:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-14 15:45:54,706 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:45:54,707 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:45:54,707 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:45:54,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1597240285, now seen corresponding path program 1 times [2018-09-14 15:45:54,708 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:45:54,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:45:54,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:45:54,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:45:54,710 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:45:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:45:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:45:55,130 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 15:45:55,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 15:45:55,134 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:45:55,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 15:45:55,136 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 15:45:55,136 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-14 15:45:55,136 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-09-14 15:45:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:45:55,246 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-14 15:45:55,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 15:45:55,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-09-14 15:45:55,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:45:55,247 INFO L225 Difference]: With dead ends: 29 [2018-09-14 15:45:55,247 INFO L226 Difference]: Without dead ends: 21 [2018-09-14 15:45:55,249 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 15:45:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-14 15:45:55,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-14 15:45:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-14 15:45:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-14 15:45:55,254 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-09-14 15:45:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:45:55,255 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-14 15:45:55,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 15:45:55,255 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-14 15:45:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-14 15:45:55,256 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:45:55,256 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:45:55,257 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:45:55,257 INFO L82 PathProgramCache]: Analyzing trace with hash 145570050, now seen corresponding path program 1 times [2018-09-14 15:45:55,257 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:45:55,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:45:55,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:45:55,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:45:55,259 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:45:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:45:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:45:55,571 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 15:45:55,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-14 15:45:55,571 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:45:55,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 15:45:55,572 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 15:45:55,572 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-14 15:45:55,573 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-09-14 15:45:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:45:55,887 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-09-14 15:45:55,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 15:45:55,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-09-14 15:45:55,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:45:55,889 INFO L225 Difference]: With dead ends: 34 [2018-09-14 15:45:55,889 INFO L226 Difference]: Without dead ends: 25 [2018-09-14 15:45:55,890 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-14 15:45:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-14 15:45:55,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-14 15:45:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-14 15:45:55,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-14 15:45:55,897 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-09-14 15:45:55,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:45:55,898 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-14 15:45:55,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 15:45:55,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-14 15:45:55,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-14 15:45:55,899 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:45:55,899 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:45:55,900 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:45:55,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1819847252, now seen corresponding path program 1 times [2018-09-14 15:45:55,900 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:45:55,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:45:55,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:45:55,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:45:55,902 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:45:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:45:56,442 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2018-09-14 15:45:56,678 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-14 15:45:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:45:56,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:45:56,722 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:45:56,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:45:56,732 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 15:45:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:45:56,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:45:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:45:57,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:45:57,349 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-09-14 15:45:57,512 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-14 15:45:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:45:58,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:45:58,130 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:45:58,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:45:58,148 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 15:45:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:45:58,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:46:02,514 WARN L178 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 35 DAG size of output: 13 [2018-09-14 15:46:04,645 WARN L178 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 19 [2018-09-14 15:46:07,012 WARN L178 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 25 [2018-09-14 15:46:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:46:07,244 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:46:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:46:07,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 15:46:07,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 8, 7] total 25 [2018-09-14 15:46:07,799 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:46:07,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 15:46:07,799 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 15:46:07,802 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2018-09-14 15:46:07,803 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-09-14 15:46:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:46:12,007 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-09-14 15:46:12,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 15:46:12,008 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-09-14 15:46:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:46:12,012 INFO L225 Difference]: With dead ends: 43 [2018-09-14 15:46:12,012 INFO L226 Difference]: Without dead ends: 34 [2018-09-14 15:46:12,013 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=204, Invalid=664, Unknown=2, NotChecked=0, Total=870 [2018-09-14 15:46:12,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-14 15:46:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2018-09-14 15:46:12,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-14 15:46:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-09-14 15:46:12,020 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2018-09-14 15:46:12,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:46:12,020 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-09-14 15:46:12,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-14 15:46:12,021 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-09-14 15:46:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-14 15:46:12,022 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:46:12,022 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:46:12,022 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:46:12,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2082093034, now seen corresponding path program 1 times [2018-09-14 15:46:12,023 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:46:12,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:46:12,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:46:12,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:46:12,024 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:46:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:46:13,008 WARN L178 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 27 [2018-09-14 15:46:13,729 WARN L178 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2018-09-14 15:46:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:46:13,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:46:13,833 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:46:13,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:46:13,844 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 15:46:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:46:13,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:46:13,887 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-14 15:46:13,887 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:13,911 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-09-14 15:46:13,916 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:46:13,917 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:13,922 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:46:13,926 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:46:13,926 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:91, output treesize:17 [2018-09-14 15:46:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:46:14,570 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:46:14,686 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-09-14 15:46:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:46:15,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:46:15,609 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:46:15,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:46:15,624 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 15:46:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:46:15,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:46:15,752 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-14 15:46:15,752 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:15,767 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-09-14 15:46:15,770 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:46:15,771 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:15,793 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:46:15,799 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2018-09-14 15:46:15,802 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:46:15,803 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:15,825 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:46:15,830 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-09-14 15:46:15,853 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:46:15,854 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:15,923 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:46:15,931 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2018-09-14 15:46:15,935 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:46:15,936 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:15,949 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:46:15,951 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-14 15:46:15,952 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:16,104 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-09-14 15:46:16,105 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:445, output treesize:66 [2018-09-14 15:46:16,614 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2018-09-14 15:46:16,946 WARN L178 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-09-14 15:46:17,963 WARN L178 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2018-09-14 15:46:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:46:18,075 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:46:18,239 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-09-14 15:46:18,635 WARN L178 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-09-14 15:46:19,213 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-09-14 15:46:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:46:19,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 15:46:19,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10, 10, 9] total 39 [2018-09-14 15:46:19,703 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:46:19,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-14 15:46:19,704 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-14 15:46:19,705 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2018-09-14 15:46:19,705 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 16 states. [2018-09-14 15:46:21,092 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2018-09-14 15:46:23,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:46:23,199 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2018-09-14 15:46:23,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 15:46:23,200 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2018-09-14 15:46:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:46:23,203 INFO L225 Difference]: With dead ends: 48 [2018-09-14 15:46:23,203 INFO L226 Difference]: Without dead ends: 36 [2018-09-14 15:46:23,204 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2018-09-14 15:46:23,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-14 15:46:23,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2018-09-14 15:46:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-14 15:46:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-09-14 15:46:23,211 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2018-09-14 15:46:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:46:23,211 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-09-14 15:46:23,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-14 15:46:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-09-14 15:46:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-14 15:46:23,212 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:46:23,212 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:46:23,213 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:46:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1253110442, now seen corresponding path program 2 times [2018-09-14 15:46:23,213 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:46:23,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:46:23,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:46:23,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:46:23,214 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:46:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:46:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:46:23,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:46:23,500 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:46:23,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 15:46:23,515 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:46:23,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-09-14 15:46:23,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:46:23,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:46:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-14 15:46:23,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:46:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-14 15:46:24,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:46:24,140 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:46:24,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 15:46:24,156 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:46:24,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-09-14 15:46:24,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:46:24,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:46:30,283 WARN L178 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 24 [2018-09-14 15:46:34,868 WARN L178 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 23 [2018-09-14 15:46:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-14 15:46:34,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:46:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-14 15:46:35,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 15:46:35,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6, 7, 6] total 25 [2018-09-14 15:46:35,627 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:46:35,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-14 15:46:35,628 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-14 15:46:35,629 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=483, Unknown=3, NotChecked=0, Total=600 [2018-09-14 15:46:35,630 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 13 states. [2018-09-14 15:46:39,574 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2018-09-14 15:46:43,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:46:43,776 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2018-09-14 15:46:43,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-14 15:46:43,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2018-09-14 15:46:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:46:43,778 INFO L225 Difference]: With dead ends: 52 [2018-09-14 15:46:43,779 INFO L226 Difference]: Without dead ends: 40 [2018-09-14 15:46:43,780 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=247, Invalid=937, Unknown=6, NotChecked=0, Total=1190 [2018-09-14 15:46:43,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-14 15:46:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2018-09-14 15:46:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-14 15:46:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-09-14 15:46:43,786 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 28 [2018-09-14 15:46:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:46:43,786 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-09-14 15:46:43,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-14 15:46:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-09-14 15:46:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-14 15:46:43,787 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:46:43,787 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:46:43,787 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:46:43,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1646137452, now seen corresponding path program 2 times [2018-09-14 15:46:43,788 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:46:43,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:46:43,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 15:46:43,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:46:43,789 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:46:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:46:44,523 WARN L178 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 24 [2018-09-14 15:46:45,163 WARN L178 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2018-09-14 15:46:45,570 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2018-09-14 15:46:45,701 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2018-09-14 15:46:48,254 WARN L178 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2018-09-14 15:46:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:46:48,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:46:48,259 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:46:48,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 15:46:48,268 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:46:48,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 15:46:48,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:46:48,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:46:48,319 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-14 15:46:48,320 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:52,350 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-09-14 15:46:52,353 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:46:52,353 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:52,355 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:46:52,357 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:46:52,357 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:91, output treesize:17 [2018-09-14 15:46:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:46:54,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:46:55,006 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2018-09-14 15:46:55,893 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2018-09-14 15:46:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:46:56,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:46:56,385 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 15:46:56,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 15:46:56,401 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:46:56,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 15:46:56,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:46:56,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:46:56,558 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-14 15:46:56,559 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:56,572 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-14 15:46:56,572 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:56,586 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-14 15:46:56,586 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:56,714 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 36 [2018-09-14 15:46:56,717 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:46:56,718 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:56,731 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:46:56,737 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2018-09-14 15:46:56,741 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:46:56,742 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-09-14 15:46:56,753 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:46:56,785 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-09-14 15:46:56,786 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:445, output treesize:66 [2018-09-14 15:47:05,333 WARN L178 SmtUtils]: Spent 8.45 s on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2018-09-14 15:47:07,981 WARN L178 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 47 [2018-09-14 15:47:08,193 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2018-09-14 15:47:09,162 WARN L178 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2018-09-14 15:47:14,045 WARN L178 SmtUtils]: Spent 3.62 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2018-09-14 15:47:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:47:14,802 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:47:15,008 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2018-09-14 15:47:15,172 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2018-09-14 15:47:16,087 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2018-09-14 15:47:16,794 WARN L178 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2018-09-14 15:47:17,181 WARN L178 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2018-09-14 15:47:17,492 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2018-09-14 15:47:17,835 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-09-14 15:47:18,158 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-09-14 15:47:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:47:18,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 15:47:18,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 14, 13] total 55 [2018-09-14 15:47:18,212 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:47:18,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-14 15:47:18,213 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-14 15:47:18,214 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2639, Unknown=1, NotChecked=0, Total=2970 [2018-09-14 15:47:18,214 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 22 states. [2018-09-14 15:47:18,642 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2018-09-14 15:47:19,351 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2018-09-14 15:47:19,599 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2018-09-14 15:47:19,915 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 61 [2018-09-14 15:47:20,367 WARN L178 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2018-09-14 15:47:21,763 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2018-09-14 15:47:22,068 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2018-09-14 15:47:22,874 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 78 [2018-09-14 15:47:22,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:47:22,988 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2018-09-14 15:47:22,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-14 15:47:22,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2018-09-14 15:47:22,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:47:22,990 INFO L225 Difference]: With dead ends: 67 [2018-09-14 15:47:22,990 INFO L226 Difference]: Without dead ends: 55 [2018-09-14 15:47:22,993 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=486, Invalid=4205, Unknown=1, NotChecked=0, Total=4692 [2018-09-14 15:47:22,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-14 15:47:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2018-09-14 15:47:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-14 15:47:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-09-14 15:47:23,000 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2018-09-14 15:47:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:47:23,000 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-09-14 15:47:23,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-14 15:47:23,001 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-09-14 15:47:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-14 15:47:23,001 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:47:23,002 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:47:23,002 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:47:23,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1637712594, now seen corresponding path program 3 times [2018-09-14 15:47:23,002 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:47:23,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:47:23,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 15:47:23,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:47:23,003 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:47:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:47:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-14 15:47:23,069 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 15:47:23,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 15:47:23,069 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:47:23,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 15:47:23,070 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 15:47:23,070 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 15:47:23,070 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2018-09-14 15:47:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:47:23,139 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2018-09-14 15:47:23,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 15:47:23,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2018-09-14 15:47:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:47:23,141 INFO L225 Difference]: With dead ends: 56 [2018-09-14 15:47:23,141 INFO L226 Difference]: Without dead ends: 33 [2018-09-14 15:47:23,141 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 15:47:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-14 15:47:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-14 15:47:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-14 15:47:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-14 15:47:23,147 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 28 [2018-09-14 15:47:23,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:47:23,147 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-14 15:47:23,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 15:47:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-14 15:47:23,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-14 15:47:23,148 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:47:23,149 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:47:23,149 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:47:23,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1605254594, now seen corresponding path program 4 times [2018-09-14 15:47:23,149 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:47:23,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:47:23,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 15:47:23,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:47:23,150 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:47:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:47:23,865 WARN L178 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 35 [2018-09-14 15:47:24,096 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2018-09-14 15:47:24,300 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2018-09-14 15:47:30,043 WARN L178 SmtUtils]: Spent 5.35 s on a formula simplification that was a NOOP. DAG size: 50 [2018-09-14 15:47:34,305 WARN L178 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 85 DAG size of output: 35 [2018-09-14 15:47:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:47:34,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:47:34,312 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 15:47:34,323 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-14 15:47:34,323 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-14 15:47:34,396 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-14 15:47:34,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:47:34,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:47:34,407 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-09-14 15:47:34,425 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:47:34,426 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-14 15:47:34,440 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:47:34,447 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-09-14 15:47:34,451 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:47:34,451 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-09-14 15:47:34,461 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:47:36,496 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:47:36,496 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-09-14 15:47:37,206 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2018-09-14 15:47:37,658 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2018-09-14 15:47:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:47:38,412 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:47:38,702 WARN L178 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 89 [2018-09-14 15:47:40,436 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-09-14 15:47:40,930 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-09-14 15:47:41,596 WARN L178 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2018-09-14 15:47:42,363 WARN L178 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2018-09-14 15:47:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:47:42,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:47:42,407 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 15:47:42,435 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-14 15:47:42,435 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-14 15:47:42,561 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-14 15:47:42,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:47:42,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:47:42,572 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-14 15:47:42,573 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-14 15:47:50,627 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-09-14 15:47:50,629 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:47:50,630 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-14 15:47:50,631 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:47:50,636 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:47:50,637 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-09-14 15:47:51,585 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2018-09-14 15:47:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:47:55,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:47:55,272 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2018-09-14 15:47:56,204 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-09-14 15:47:57,634 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2018-09-14 15:47:58,251 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2018-09-14 15:47:58,741 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2018-09-14 15:47:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:47:58,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 15:47:58,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16, 15, 14] total 64 [2018-09-14 15:47:58,766 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:47:58,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-14 15:47:58,767 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-14 15:47:58,768 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=3728, Unknown=2, NotChecked=0, Total=4032 [2018-09-14 15:47:58,768 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 27 states. [2018-09-14 15:47:59,552 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2018-09-14 15:48:00,488 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2018-09-14 15:48:00,865 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-09-14 15:48:01,962 WARN L178 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2018-09-14 15:48:04,534 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 69 [2018-09-14 15:48:05,117 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2018-09-14 15:48:05,736 WARN L178 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2018-09-14 15:48:05,998 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2018-09-14 15:48:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:48:06,342 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-14 15:48:06,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-14 15:48:06,343 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2018-09-14 15:48:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:48:06,344 INFO L225 Difference]: With dead ends: 48 [2018-09-14 15:48:06,344 INFO L226 Difference]: Without dead ends: 38 [2018-09-14 15:48:06,347 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=557, Invalid=5446, Unknown=3, NotChecked=0, Total=6006 [2018-09-14 15:48:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-14 15:48:06,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-09-14 15:48:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-14 15:48:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-14 15:48:06,354 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 32 [2018-09-14 15:48:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:48:06,356 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-14 15:48:06,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-14 15:48:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-14 15:48:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-14 15:48:06,357 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:48:06,357 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:48:06,357 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:48:06,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1810116584, now seen corresponding path program 5 times [2018-09-14 15:48:06,358 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:48:06,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:48:06,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 15:48:06,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:48:06,359 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:48:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:48:07,537 WARN L178 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 34 [2018-09-14 15:48:08,134 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 68 [2018-09-14 15:48:08,317 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 48 [2018-09-14 15:48:08,570 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2018-09-14 15:48:24,960 WARN L178 SmtUtils]: Spent 14.28 s on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2018-09-14 15:48:56,419 WARN L178 SmtUtils]: Spent 26.28 s on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2018-09-14 15:48:56,663 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2018-09-14 15:48:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:48:56,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:48:56,673 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 15:48:56,681 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-14 15:48:56,682 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:48:57,062 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-14 15:48:57,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:48:57,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:48:57,072 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-09-14 15:48:57,078 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:48:57,078 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-14 15:48:57,086 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:48:57,090 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-09-14 15:48:57,102 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:48:57,103 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-09-14 15:48:57,127 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:49:03,171 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:49:03,171 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-09-14 15:49:09,503 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2018-09-14 15:49:16,404 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2018-09-14 15:49:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:49:18,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:49:19,203 WARN L178 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2018-09-14 15:49:19,377 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2018-09-14 15:49:22,523 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2018-09-14 15:49:23,127 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2018-09-14 15:49:23,406 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2018-09-14 15:49:24,139 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-09-14 15:49:24,933 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-09-14 15:49:25,443 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2018-09-14 15:49:26,072 WARN L178 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2018-09-14 15:49:26,836 WARN L178 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2018-09-14 15:49:27,975 WARN L178 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2018-09-14 15:49:29,236 WARN L178 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2018-09-14 15:49:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:49:29,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:49:29,400 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 15:49:29,418 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-14 15:49:29,418 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:49:29,620 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-14 15:49:29,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:49:29,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:49:29,634 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-14 15:49:29,635 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-14 15:49:29,643 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2018-09-14 15:49:29,650 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:49:29,650 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-14 15:49:29,670 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:49:29,671 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-14 15:49:29,671 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-09-14 15:49:29,675 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-09-14 15:49:29,688 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:49:29,688 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-09-14 15:49:29,705 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:49:29,708 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-09-14 15:49:29,712 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:49:29,713 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-09-14 15:49:29,732 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:49:29,737 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2018-09-14 15:49:29,743 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-14 15:49:29,743 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-09-14 15:49:29,767 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-14 15:49:29,860 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-09-14 15:49:29,860 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:445, output treesize:66 [2018-09-14 15:49:42,575 WARN L178 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2018-09-14 15:49:47,795 WARN L178 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 41 [2018-09-14 15:49:51,148 WARN L178 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2018-09-14 15:49:55,495 WARN L178 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-09-14 15:50:00,448 WARN L178 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2018-09-14 15:50:03,570 WARN L178 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-09-14 15:50:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:03,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:50:03,780 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2018-09-14 15:50:03,928 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2018-09-14 15:50:05,898 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2018-09-14 15:50:07,455 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-09-14 15:50:08,887 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-09-14 15:50:12,792 WARN L178 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2018-09-14 15:50:13,632 WARN L178 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-09-14 15:50:14,207 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-09-14 15:50:15,196 WARN L178 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2018-09-14 15:50:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:50:15,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 15:50:15,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 17, 17, 16] total 74 [2018-09-14 15:50:15,235 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:50:15,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-14 15:50:15,237 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-14 15:50:15,238 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=4921, Unknown=21, NotChecked=0, Total=5402 [2018-09-14 15:50:15,239 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 30 states. [2018-09-14 15:50:24,797 WARN L979 $PredicateComparison]: unable to prove that (let ((.cse9 (mod (+ c_linear_search_~j~0 4294967295) 4294967296)) (.cse8 (select |c_#memory_int| c_linear_search_~a.base)) (.cse2 (div c_linear_search_~j~0 4294967296))) (and (= |c_linear_search_#in~a.base| c_linear_search_~a.base) (or (let ((.cse3 (- |c_linear_search_#in~n|))) (let ((.cse6 (- .cse3))) (let ((.cse1 (div .cse6 4294967296)) (.cse0 (* 4294967296 .cse2))) (and (<= .cse0 (+ |c_linear_search_#in~n| (* 2 (div (+ (* 4294967296 (+ .cse1 .cse2)) (+ .cse3 (+ (* (- 4294967296) .cse1) (- 4)))) 2)) 4)) (or (not (= 0 |c_linear_search_#in~a.offset|)) (let ((.cse5 (div (+ .cse6 (+ .cse0 4294967291)) 4294967296)) (.cse7 (* (- 4294967296) .cse2))) (let ((.cse4 (* 17179869184 (div (+ .cse6 (+ (* 4294967296 .cse5) (+ .cse7 4294967296))) 8589934592)))) (and (not (= (select (select |c_#memory_int| |c_linear_search_#in~a.base|) (- (+ (* (- 8589934592) .cse1) (+ (* 2 .cse3) (+ (* 8589934592 .cse2) .cse4))))) |c_linear_search_#in~q|)) (<= (+ (* 8589934592 .cse5) .cse4) (+ (* 8589934592 .cse1) (* 17179869184 (div (+ (* 4294967296 .cse1) (+ .cse6 .cse7)) 8589934592)))))))))))) |c_linear_search_#t~short1|) (= |c_linear_search_#in~a.offset| c_linear_search_~a.offset) (= c_linear_search_~j~0 2) (not (= (select .cse8 (+ (* 4 .cse9) c_linear_search_~a.offset)) c_linear_search_~q)) (= |c_linear_search_#in~n| c_linear_search_~n) (exists ((|v_main_~#a~0.base_BEFORE_CALL_13| Int)) (= 3 (select (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_13|) (* 4 (mod (div (mod c_~SIZE~0 4294967296) 2) 4294967296))))) (< .cse9 (mod c_linear_search_~n 4294967296)) (<= c_linear_search_~j~0 4) (= |c_linear_search_#in~q| c_linear_search_~q) (not (= (select .cse8 (+ (* 4 (mod (+ c_linear_search_~j~0 4294967294) 4294967296)) c_linear_search_~a.offset)) c_linear_search_~q)) (< 0 (+ .cse2 1)))) is different from false Received shutdown request... [2018-09-14 15:50:26,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-14 15:50:26,861 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 15:50:26,866 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 15:50:26,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 03:50:26 BoogieIcfgContainer [2018-09-14 15:50:26,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 15:50:26,867 INFO L168 Benchmark]: Toolchain (without parser) took 273511.14 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 926.4 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -833.3 MB). Peak memory consumption was 93.2 MB. Max. memory is 7.1 GB. [2018-09-14 15:50:26,868 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 15:50:26,868 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 15:50:26,869 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 15:50:26,869 INFO L168 Benchmark]: Boogie Preprocessor took 28.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 15:50:26,869 INFO L168 Benchmark]: RCFGBuilder took 566.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -798.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-09-14 15:50:26,870 INFO L168 Benchmark]: TraceAbstraction took 272589.51 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 164.1 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -45.4 MB). Peak memory consumption was 118.7 MB. Max. memory is 7.1 GB. [2018-09-14 15:50:26,872 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 566.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -798.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 272589.51 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 164.1 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -45.4 MB). Peak memory consumption was 118.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (37states) and FLOYD_HOARE automaton (currently 13 states, 30 states before enhancement), while ReachableStatesComputation was computing reachable states (21 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. TIMEOUT Result, 272.5s OverallTime, 10 OverallIterations, 5 TraceHistogramMax, 40.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 194 SDtfs, 249 SDslu, 1045 SDs, 0 SdLazy, 1257 SolverSat, 90 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 9.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 819 GetRequests, 453 SyntacticMatches, 36 SemanticMatches, 330 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5596 ImplicationChecksByTransitivity, 231.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 46 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 229.6s InterpolantComputationTime, 601 NumberOfCodeBlocks, 585 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 911 ConstructedInterpolants, 223 QuantifiedInterpolants, 1269760 SizeOfPredicates, 202 NumberOfNonLiveVariables, 1678 ConjunctsInSsa, 501 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 45/492 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/linear_sea.ch_true-unreach-call.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_15-50-26-885.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/linear_sea.ch_true-unreach-call.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_15-50-26-885.csv Completed graceful shutdown