java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/invert_string_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:36:31,564 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:36:31,567 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:36:31,579 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:36:31,579 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:36:31,580 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:36:31,581 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:36:31,583 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:36:31,585 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:36:31,586 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:36:31,587 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:36:31,587 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:36:31,588 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:36:31,589 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:36:31,590 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:36:31,591 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:36:31,592 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:36:31,593 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:36:31,595 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:36:31,599 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:36:31,601 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:36:31,602 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:36:31,605 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:36:31,617 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:36:31,647 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:36:31,648 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:36:31,649 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:36:31,650 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:36:31,650 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:36:31,651 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:36:31,651 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:36:31,651 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:36:31,651 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:36:31,652 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:36:31,653 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:36:31,653 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:36:31,653 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:36:31,654 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:36:31,654 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:36:31,654 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:36:31,654 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:36:31,654 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:36:31,655 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:36:31,655 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:36:31,655 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:36:31,655 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:36:31,656 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:36:31,656 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:36:31,656 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:36:31,656 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:36:31,656 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:36:31,657 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:36:31,733 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:36:31,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:36:31,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:36:31,755 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:36:31,755 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:36:31,756 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/invert_string_true-unreach-call_true-termination.i [2018-10-22 15:36:31,822 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e3eec34fa/aa5ffb22ea6d4928908a33b07c962c8c/FLAG2509046b8 [2018-10-22 15:36:32,333 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:36:32,334 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string_true-unreach-call_true-termination.i [2018-10-22 15:36:32,341 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e3eec34fa/aa5ffb22ea6d4928908a33b07c962c8c/FLAG2509046b8 [2018-10-22 15:36:32,355 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e3eec34fa/aa5ffb22ea6d4928908a33b07c962c8c [2018-10-22 15:36:32,365 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:36:32,366 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:36:32,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:32,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:36:32,372 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:36:32,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3236d4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32, skipping insertion in model container [2018-10-22 15:36:32,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:36:32,419 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:36:32,629 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:32,633 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:36:32,662 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:32,690 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:36:32,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32 WrapperNode [2018-10-22 15:36:32,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:32,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:32,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:36:32,692 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:36:32,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:32,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:36:32,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:36:32,743 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:36:32,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:36:32,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:36:32,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:36:32,772 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:36:32,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:36:32,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-10-22 15:36:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-10-22 15:36:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:36:32,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:36:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-22 15:36:32,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-10-22 15:36:33,373 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:36:33,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:33 BoogieIcfgContainer [2018-10-22 15:36:33,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:36:33,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:36:33,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:36:33,378 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:36:33,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:36:32" (1/3) ... [2018-10-22 15:36:33,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10929bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:33, skipping insertion in model container [2018-10-22 15:36:33,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32" (2/3) ... [2018-10-22 15:36:33,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10929bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:33, skipping insertion in model container [2018-10-22 15:36:33,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:33" (3/3) ... [2018-10-22 15:36:33,382 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string_true-unreach-call_true-termination.i [2018-10-22 15:36:33,391 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:36:33,400 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:36:33,418 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:36:33,450 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:36:33,450 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:36:33,451 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:36:33,451 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:36:33,451 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:36:33,451 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:36:33,451 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:36:33,452 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:36:33,452 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:36:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-10-22 15:36:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 15:36:33,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:33,478 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:33,480 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:33,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:33,487 INFO L82 PathProgramCache]: Analyzing trace with hash -73496645, now seen corresponding path program 1 times [2018-10-22 15:36:33,490 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:33,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:33,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:33,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:33,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:33,628 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:33,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:36:33,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:36:33,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:36:33,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:36:33,650 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2018-10-22 15:36:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:33,671 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2018-10-22 15:36:33,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:36:33,673 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-10-22 15:36:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:33,686 INFO L225 Difference]: With dead ends: 62 [2018-10-22 15:36:33,686 INFO L226 Difference]: Without dead ends: 29 [2018-10-22 15:36:33,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:36:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-22 15:36:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-22 15:36:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:36:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-22 15:36:33,744 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 17 [2018-10-22 15:36:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:33,744 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-22 15:36:33,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:36:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-22 15:36:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:36:33,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:33,746 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:33,746 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:33,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:33,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1050305296, now seen corresponding path program 1 times [2018-10-22 15:36:33,747 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:33,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:33,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:33,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:33,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:34,215 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:34,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:36:34,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:36:34,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:36:34,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:36:34,220 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2018-10-22 15:36:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:34,469 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2018-10-22 15:36:34,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:36:34,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-10-22 15:36:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:34,471 INFO L225 Difference]: With dead ends: 46 [2018-10-22 15:36:34,471 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 15:36:34,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:36:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 15:36:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-22 15:36:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-22 15:36:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-22 15:36:34,480 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 19 [2018-10-22 15:36:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:34,480 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-22 15:36:34,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:36:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-22 15:36:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:36:34,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:34,482 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:34,482 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:34,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash -324442504, now seen corresponding path program 1 times [2018-10-22 15:36:34,483 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:34,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:34,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:34,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:34,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:34,908 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2018-10-22 15:36:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:35,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:35,161 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:35,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:35,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:35,368 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:36:35,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2018-10-22 15:36:35,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:36:35,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:36:35,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:36:35,371 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2018-10-22 15:36:35,731 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2018-10-22 15:36:36,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:36,038 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2018-10-22 15:36:36,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:36:36,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-10-22 15:36:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:36,046 INFO L225 Difference]: With dead ends: 77 [2018-10-22 15:36:36,046 INFO L226 Difference]: Without dead ends: 56 [2018-10-22 15:36:36,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:36:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-22 15:36:36,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2018-10-22 15:36:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-22 15:36:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-10-22 15:36:36,055 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 25 [2018-10-22 15:36:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:36,056 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-10-22 15:36:36,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:36:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-10-22 15:36:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-22 15:36:36,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:36,057 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:36,058 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:36,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1534773450, now seen corresponding path program 1 times [2018-10-22 15:36:36,058 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:36,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:36,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:36,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:36,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:36,476 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2018-10-22 15:36:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:36,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:36,825 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:36,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:36,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:36,896 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 6 treesize of output 5 [2018-10-22 15:36:36,898 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:36,908 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:36,908 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-10-22 15:36:36,950 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,954 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:36,956 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-10-22 15:36:36,956 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:36,964 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:36,964 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:8 [2018-10-22 15:36:37,578 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2018-10-22 15:36:37,582 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 16 treesize of output 15 [2018-10-22 15:36:37,583 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:37,592 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:37,610 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:37,611 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2018-10-22 15:36:38,237 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2018-10-22 15:36:38,243 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:36:38,244 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2018-10-22 15:36:38,245 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:38,259 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:36:38,261 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-10-22 15:36:38,261 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:38,268 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:38,285 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:38,285 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:3 [2018-10-22 15:36:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:38,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:38,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16] total 22 [2018-10-22 15:36:38,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:36:38,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:36:38,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:36:38,379 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 22 states. [2018-10-22 15:36:39,090 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2018-10-22 15:36:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:40,387 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-10-22 15:36:40,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:36:40,388 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2018-10-22 15:36:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:40,391 INFO L225 Difference]: With dead ends: 60 [2018-10-22 15:36:40,391 INFO L226 Difference]: Without dead ends: 49 [2018-10-22 15:36:40,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:36:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-22 15:36:40,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-10-22 15:36:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-22 15:36:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-22 15:36:40,402 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 36 [2018-10-22 15:36:40,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:40,402 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-22 15:36:40,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:36:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-22 15:36:40,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-22 15:36:40,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:40,404 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:40,404 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:40,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:40,405 INFO L82 PathProgramCache]: Analyzing trace with hash 640751794, now seen corresponding path program 2 times [2018-10-22 15:36:40,405 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:40,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:40,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:40,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:40,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:40,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:40,759 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:40,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:36:40,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:36:40,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:40,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:40,818 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 6 treesize of output 5 [2018-10-22 15:36:40,818 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:40,845 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:40,846 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-10-22 15:36:40,864 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:40,866 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:40,868 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-10-22 15:36:40,868 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:40,874 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:40,874 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:8 [2018-10-22 15:36:41,403 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2018-10-22 15:36:41,407 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 16 treesize of output 15 [2018-10-22 15:36:41,408 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:41,414 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:41,434 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:41,435 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2018-10-22 15:36:41,838 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2018-10-22 15:36:41,844 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:36:41,845 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2018-10-22 15:36:41,845 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:41,858 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:36:41,860 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-10-22 15:36:41,860 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:41,874 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:41,888 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:41,888 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:3 [2018-10-22 15:36:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:41,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:41,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18] total 25 [2018-10-22 15:36:41,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:36:41,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:36:41,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:36:41,987 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 25 states. [2018-10-22 15:36:43,602 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2018-10-22 15:36:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:45,094 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2018-10-22 15:36:45,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:36:45,100 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2018-10-22 15:36:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:45,101 INFO L225 Difference]: With dead ends: 79 [2018-10-22 15:36:45,102 INFO L226 Difference]: Without dead ends: 68 [2018-10-22 15:36:45,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:36:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-22 15:36:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2018-10-22 15:36:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-22 15:36:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-10-22 15:36:45,110 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 42 [2018-10-22 15:36:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:45,110 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-10-22 15:36:45,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:36:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-10-22 15:36:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-22 15:36:45,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:45,112 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:45,112 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:45,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:45,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1923753318, now seen corresponding path program 3 times [2018-10-22 15:36:45,113 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:45,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:45,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:45,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:45,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:45,734 WARN L179 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 14 [2018-10-22 15:36:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:45,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:45,859 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:45,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:36:45,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-22 15:36:45,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:45,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-10-22 15:36:46,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:46,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2018-10-22 15:36:46,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:36:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:36:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:36:46,061 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 10 states. [2018-10-22 15:36:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:46,456 INFO L93 Difference]: Finished difference Result 139 states and 145 transitions. [2018-10-22 15:36:46,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:36:46,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-10-22 15:36:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:46,458 INFO L225 Difference]: With dead ends: 139 [2018-10-22 15:36:46,459 INFO L226 Difference]: Without dead ends: 100 [2018-10-22 15:36:46,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:36:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-22 15:36:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 62. [2018-10-22 15:36:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:36:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-22 15:36:46,468 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 48 [2018-10-22 15:36:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:46,469 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-22 15:36:46,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:36:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-22 15:36:46,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-22 15:36:46,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:46,471 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:46,471 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:46,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:46,471 INFO L82 PathProgramCache]: Analyzing trace with hash -409855400, now seen corresponding path program 4 times [2018-10-22 15:36:46,471 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:46,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:46,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:46,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:46,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-10-22 15:36:46,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:46,965 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:46,973 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:36:47,021 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:36:47,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:47,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:47,031 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 6 treesize of output 5 [2018-10-22 15:36:47,032 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:47,039 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:47,040 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-10-22 15:36:47,092 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:47,113 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:47,114 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-10-22 15:36:47,115 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:47,156 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:47,157 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2018-10-22 15:36:47,916 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2018-10-22 15:36:47,935 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 16 treesize of output 15 [2018-10-22 15:36:47,935 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:47,940 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:47,958 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:47,958 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2018-10-22 15:36:48,307 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2018-10-22 15:36:48,309 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:36:48,310 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2018-10-22 15:36:48,311 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:48,321 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:36:48,322 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-10-22 15:36:48,323 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:48,326 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:48,339 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:48,339 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:3 [2018-10-22 15:36:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-22 15:36:48,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:48,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 22] total 27 [2018-10-22 15:36:48,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:36:48,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:36:48,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:36:48,423 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 27 states. [2018-10-22 15:36:52,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:52,688 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2018-10-22 15:36:52,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:36:52,689 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2018-10-22 15:36:52,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:52,690 INFO L225 Difference]: With dead ends: 143 [2018-10-22 15:36:52,690 INFO L226 Difference]: Without dead ends: 98 [2018-10-22 15:36:52,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=410, Invalid=2452, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:36:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-22 15:36:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2018-10-22 15:36:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-22 15:36:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-22 15:36:52,701 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 59 [2018-10-22 15:36:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:52,702 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-22 15:36:52,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:36:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-22 15:36:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-22 15:36:52,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:52,703 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:52,704 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:52,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:52,704 INFO L82 PathProgramCache]: Analyzing trace with hash -553558830, now seen corresponding path program 1 times [2018-10-22 15:36:52,704 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:52,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:52,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:52,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:52,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-22 15:36:53,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:53,114 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:53,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:53,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:53,186 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 6 treesize of output 5 [2018-10-22 15:36:53,186 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,261 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,261 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-10-22 15:36:53,391 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:53,392 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:53,393 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-10-22 15:36:53,393 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,396 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:53,397 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:8 [2018-10-22 15:36:54,188 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-10-22 15:36:54,311 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2018-10-22 15:36:54,316 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 16 treesize of output 15 [2018-10-22 15:36:54,316 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:54,328 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:54,338 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2018-10-22 15:36:54,342 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 16 treesize of output 15 [2018-10-22 15:36:54,343 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:54,357 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:54,395 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:36:54,395 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:93, output treesize:85 [2018-10-22 15:36:54,707 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2018-10-22 15:36:54,711 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:54,713 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2018-10-22 15:36:54,714 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:54,722 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:54,739 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:54,740 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:56, output treesize:43 [2018-10-22 15:36:55,683 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2018-10-22 15:36:55,686 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:36:55,686 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2018-10-22 15:36:55,687 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:55,697 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:36:55,698 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-10-22 15:36:55,699 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:55,703 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:55,715 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:55,716 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:66, output treesize:3 [2018-10-22 15:36:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-22 15:36:55,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:55,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 27] total 33 [2018-10-22 15:36:55,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:36:55,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:36:55,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:36:55,833 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 33 states. [2018-10-22 15:36:57,764 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2018-10-22 15:36:58,716 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2018-10-22 15:37:00,341 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2018-10-22 15:37:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:00,644 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2018-10-22 15:37:00,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:37:00,644 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2018-10-22 15:37:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:00,645 INFO L225 Difference]: With dead ends: 162 [2018-10-22 15:37:00,645 INFO L226 Difference]: Without dead ends: 111 [2018-10-22 15:37:00,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=490, Invalid=3292, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:37:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-22 15:37:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2018-10-22 15:37:00,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-22 15:37:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-22 15:37:00,661 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 72 [2018-10-22 15:37:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:00,662 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-22 15:37:00,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:37:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-22 15:37:00,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-22 15:37:00,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:00,664 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:00,664 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:00,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:00,664 INFO L82 PathProgramCache]: Analyzing trace with hash -285969992, now seen corresponding path program 2 times [2018-10-22 15:37:00,664 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:00,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:00,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:00,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:37:00,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 35 refuted. 3 times theorem prover too weak. 90 trivial. 0 not checked. [2018-10-22 15:37:07,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:07,277 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:37:07,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:37:07,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:37:07,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:07,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:07,343 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 6 treesize of output 5 [2018-10-22 15:37:07,344 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:07,349 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:07,349 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-10-22 15:37:07,364 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:07,366 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:07,366 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-10-22 15:37:07,367 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:07,373 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:07,374 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2018-10-22 15:37:08,774 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 46 [2018-10-22 15:37:08,777 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 16 treesize of output 15 [2018-10-22 15:37:08,778 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,793 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,800 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 46 [2018-10-22 15:37:08,804 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 16 treesize of output 15 [2018-10-22 15:37:08,804 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,819 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,859 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:37:08,860 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:99, output treesize:91 [2018-10-22 15:37:09,183 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2018-10-22 15:37:09,186 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:09,187 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-10-22 15:37:09,188 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,210 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,265 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2018-10-22 15:37:09,274 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:09,276 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-10-22 15:37:09,276 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,297 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,350 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:37:09,351 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:95 [2018-10-22 15:37:10,219 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2018-10-22 15:37:10,227 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:10,240 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2018-10-22 15:37:10,241 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:10,247 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:10,266 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:10,266 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:46 [2018-10-22 15:37:11,514 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2018-10-22 15:37:11,522 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:37:11,523 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2018-10-22 15:37:11,523 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:11,534 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:37:11,535 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-10-22 15:37:11,535 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:11,540 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:11,551 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:11,551 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:63, output treesize:3 [2018-10-22 15:37:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-22 15:37:11,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:11,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 28] total 35 [2018-10-22 15:37:11,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:37:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:37:11,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1075, Unknown=2, NotChecked=0, Total=1190 [2018-10-22 15:37:11,677 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 35 states. [2018-10-22 15:37:29,108 WARN L179 SmtUtils]: Spent 10.14 s on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2018-10-22 15:37:34,743 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2018-10-22 15:37:35,047 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2018-10-22 15:37:35,658 WARN L179 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2018-10-22 15:37:36,479 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 40 [2018-10-22 15:37:37,579 WARN L179 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2018-10-22 15:37:37,895 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-10-22 15:37:38,776 WARN L179 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2018-10-22 15:37:39,015 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 44 [2018-10-22 15:37:39,443 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2018-10-22 15:37:42,164 WARN L179 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2018-10-22 15:37:44,523 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-10-22 15:37:49,181 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2018-10-22 15:37:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:49,423 INFO L93 Difference]: Finished difference Result 172 states and 175 transitions. [2018-10-22 15:37:49,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:37:49,423 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 85 [2018-10-22 15:37:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:49,424 INFO L225 Difference]: With dead ends: 172 [2018-10-22 15:37:49,424 INFO L226 Difference]: Without dead ends: 113 [2018-10-22 15:37:49,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=733, Invalid=3954, Unknown=5, NotChecked=0, Total=4692 [2018-10-22 15:37:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-22 15:37:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2018-10-22 15:37:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-22 15:37:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-22 15:37:49,453 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 85 [2018-10-22 15:37:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:49,453 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-22 15:37:49,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:37:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-22 15:37:49,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-22 15:37:49,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:49,458 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:49,458 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:49,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:49,458 INFO L82 PathProgramCache]: Analyzing trace with hash -197729358, now seen corresponding path program 3 times [2018-10-22 15:37:49,458 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:49,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:49,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:49,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:49,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:50,949 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2018-10-22 15:37:51,115 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2018-10-22 15:37:51,480 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2018-10-22 15:37:51,658 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2018-10-22 15:37:51,855 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2018-10-22 15:37:51,991 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2018-10-22 15:37:52,162 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2018-10-22 15:37:52,348 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2018-10-22 15:37:52,517 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2018-10-22 15:37:52,716 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2018-10-22 15:37:52,889 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2018-10-22 15:37:53,048 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2018-10-22 15:37:53,196 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2018-10-22 15:37:53,360 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2018-10-22 15:37:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:54,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:54,510 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:37:54,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:37:54,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-22 15:37:54,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:54,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:54,691 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 6 treesize of output 5 [2018-10-22 15:37:54,691 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:54,699 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:54,699 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-10-22 15:37:54,705 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:54,707 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:54,708 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-10-22 15:37:54,708 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:54,713 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:54,714 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:11 [2018-10-22 15:37:57,131 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2018-10-22 15:37:57,135 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 16 treesize of output 15 [2018-10-22 15:37:57,135 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:57,138 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:57,156 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:57,156 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2018-10-22 15:38:07,412 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2018-10-22 15:38:07,416 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:38:07,429 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2018-10-22 15:38:07,430 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:38:07,436 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:38:07,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:38:07,454 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:46 [2018-10-22 15:38:19,748 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2018-10-22 15:38:19,753 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:38:19,757 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2018-10-22 15:38:19,757 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:38:19,771 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:38:19,798 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:38:19,798 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:46 [2018-10-22 15:38:30,383 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2018-10-22 15:38:30,404 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:38:30,406 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2018-10-22 15:38:30,407 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:38:30,413 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:38:30,433 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:38:30,433 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:46 [2018-10-22 15:38:41,441 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2018-10-22 15:38:41,443 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 15:38:41,444 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2018-10-22 15:38:41,444 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:38:41,466 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 11 treesize of output 3 [2018-10-22 15:38:41,466 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-22 15:38:41,474 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:38:41,479 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:38:41,480 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:36, output treesize:3 [2018-10-22 15:38:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-22 15:38:41,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:38:41,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 31] total 59 [2018-10-22 15:38:41,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-22 15:38:41,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-22 15:38:41,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3058, Unknown=19, NotChecked=0, Total=3422 [2018-10-22 15:38:41,592 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 59 states. [2018-10-22 15:38:42,922 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2018-10-22 15:38:43,227 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2018-10-22 15:38:44,026 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2018-10-22 15:38:44,451 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2018-10-22 15:38:48,805 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2018-10-22 15:38:59,241 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2018-10-22 15:39:11,732 WARN L179 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2018-10-22 15:39:34,185 WARN L179 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2018-10-22 15:40:35,464 WARN L179 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 68 DAG size of output: 37 Received shutdown request... [2018-10-22 15:41:10,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:41:10,863 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:41:10,867 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:41:10,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:41:10 BoogieIcfgContainer [2018-10-22 15:41:10,867 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:41:10,868 INFO L168 Benchmark]: Toolchain (without parser) took 278502.77 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -487.3 MB). Peak memory consumption was 567.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:41:10,869 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-10-22 15:41:10,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.52 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. [2018-10-22 15:41:10,869 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.67 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. [2018-10-22 15:41:10,869 INFO L168 Benchmark]: Boogie Preprocessor took 30.68 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. [2018-10-22 15:41:10,870 INFO L168 Benchmark]: RCFGBuilder took 602.62 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -806.8 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2018-10-22 15:41:10,870 INFO L168 Benchmark]: TraceAbstraction took 277492.49 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 302.5 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 309.0 MB). Peak memory consumption was 611.5 MB. Max. memory is 7.1 GB. [2018-10-22 15:41:10,872 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 323.52 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 48.67 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 30.68 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 602.62 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -806.8 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 277492.49 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 302.5 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 309.0 MB). Peak memory consumption was 611.5 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 (99states) and FLOYD_HOARE automaton (currently 31 states, 59 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 87 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 1 error locations. TIMEOUT Result, 277.4s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 202.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 246 SDtfs, 1989 SDslu, 2326 SDs, 0 SdLazy, 6218 SolverSat, 671 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 46.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 724 GetRequests, 345 SyntacticMatches, 18 SemanticMatches, 360 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4737 ImplicationChecksByTransitivity, 220.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 144 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 73.2s InterpolantComputationTime, 966 NumberOfCodeBlocks, 948 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 948 ConstructedInterpolants, 45 QuantifiedInterpolants, 1480724 SizeOfPredicates, 114 NumberOfNonLiveVariables, 877 ConjunctsInSsa, 324 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 408/1124 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown