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/linear_sea.ch_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:36:31,822 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:36:31,824 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:36:31,836 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:36:31,836 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:36:31,837 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:36:31,838 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:36:31,840 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:36:31,842 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:36:31,843 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:36:31,844 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:36:31,844 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:36:31,845 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:36:31,846 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:36:31,847 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:36:31,848 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:36:31,849 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:36:31,851 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:36:31,852 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:36:31,854 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:36:31,855 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:36:31,856 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:36:31,859 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:36:31,868 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 15:36:31,894 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:36:31,895 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:36:31,896 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:36:31,896 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:36:31,896 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:36:31,897 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:36:31,900 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:36:31,900 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:36:31,900 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:36:31,901 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:36:31,901 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:36:31,901 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:36:31,901 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:36:31,901 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:36:31,901 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:36:31,902 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:36:31,902 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:36:31,902 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:36:31,902 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:36:31,902 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:36:31,903 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:36:31,904 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:36:31,905 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:36:31,905 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:36:31,905 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:36:31,905 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:36:31,905 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:36:31,906 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:36:31,960 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:36:31,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:36:31,976 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:36:31,978 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:36:31,978 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:36:31,979 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-10-22 15:36:32,052 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fd91ede49/87d0f080118b4d8db329f3256714145a/FLAG3979fcefb [2018-10-22 15:36:32,454 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:36:32,455 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-10-22 15:36:32,460 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fd91ede49/87d0f080118b4d8db329f3256714145a/FLAG3979fcefb [2018-10-22 15:36:32,475 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fd91ede49/87d0f080118b4d8db329f3256714145a [2018-10-22 15:36:32,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:36:32,486 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:36:32,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:32,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:36:32,491 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:36:32,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6381c4d2 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 15:36:32,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:32" (1/1) ... [2018-10-22 15:36:32,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:36:32,534 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:36:32,785 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:32,795 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:36:32,821 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:32,837 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:36:32,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:32 WrapperNode [2018-10-22 15:36:32,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:32,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:32,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:36:32,839 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:36:32,847 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 15:36:32,856 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 15:36:32,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:32,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:36:32,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:36:32,877 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:36:32,886 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 15:36:32,886 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 15:36:32,888 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 15:36:32,888 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 15:36:32,894 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 15:36:32,898 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 15:36:32,900 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 15:36:32,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:36:32,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:36:32,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:36:32,903 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:36:32,904 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 15:36:33,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:36:33,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:36:33,376 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:36:33,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:33 BoogieIcfgContainer [2018-10-22 15:36:33,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:36:33,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:36:33,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:36:33,382 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:36:33,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:36:32" (1/3) ... [2018-10-22 15:36:33,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9ec813 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 15:36:33,383 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 15:36:33,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9ec813 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 15:36:33,384 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 15:36:33,386 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_sea.ch_true-unreach-call.i [2018-10-22 15:36:33,397 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:36:33,407 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:36:33,426 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:36:33,460 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:36:33,461 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:36:33,461 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:36:33,461 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:36:33,462 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:36:33,462 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:36:33,462 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:36:33,462 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:36:33,462 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:36:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-10-22 15:36:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:36:33,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:33,487 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:33,489 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:33,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1820236248, now seen corresponding path program 1 times [2018-10-22 15:36:33,500 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:33,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:33,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:33,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:33,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:33,683 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 15:36:33,685 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:33,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:36:33,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:36:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:36:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:36:33,709 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2018-10-22 15:36:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:33,727 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-10-22 15:36:33,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:36:33,729 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2018-10-22 15:36:33,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:33,743 INFO L225 Difference]: With dead ends: 24 [2018-10-22 15:36:33,743 INFO L226 Difference]: Without dead ends: 11 [2018-10-22 15:36:33,747 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 15:36:33,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-22 15:36:33,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-22 15:36:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-22 15:36:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-10-22 15:36:33,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2018-10-22 15:36:33,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:33,787 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-10-22 15:36:33,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:36:33,788 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-10-22 15:36:33,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:36:33,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:33,789 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:33,790 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:33,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:33,790 INFO L82 PathProgramCache]: Analyzing trace with hash -408476527, now seen corresponding path program 1 times [2018-10-22 15:36:33,790 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:33,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:33,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:33,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:33,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:34,045 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 15:36:34,046 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:34,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:36:34,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:36:34,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:36:34,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:34,049 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 4 states. [2018-10-22 15:36:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:34,182 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-10-22 15:36:34,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:36:34,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-22 15:36:34,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:34,184 INFO L225 Difference]: With dead ends: 15 [2018-10-22 15:36:34,184 INFO L226 Difference]: Without dead ends: 11 [2018-10-22 15:36:34,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:36:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-22 15:36:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-22 15:36:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-22 15:36:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-22 15:36:34,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-10-22 15:36:34,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:34,191 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-22 15:36:34,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:36:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-22 15:36:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:36:34,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:34,192 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:34,193 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:34,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:34,193 INFO L82 PathProgramCache]: Analyzing trace with hash -408416945, now seen corresponding path program 1 times [2018-10-22 15:36:34,193 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:34,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:34,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:34,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:34,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:34,663 WARN L179 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-22 15:36:34,913 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 15:36:34,914 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:34,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:36:34,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:36:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:36:34,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:36:34,916 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2018-10-22 15:36:35,145 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-22 15:36:35,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:35,240 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-22 15:36:35,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:36:35,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-22 15:36:35,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:35,242 INFO L225 Difference]: With dead ends: 20 [2018-10-22 15:36:35,243 INFO L226 Difference]: Without dead ends: 15 [2018-10-22 15:36:35,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:36:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-22 15:36:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-22 15:36:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-22 15:36:35,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-10-22 15:36:35,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2018-10-22 15:36:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:35,249 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-10-22 15:36:35,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:36:35,249 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-10-22 15:36:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-22 15:36:35,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:35,250 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:35,250 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:35,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:35,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1230535815, now seen corresponding path program 1 times [2018-10-22 15:36:35,251 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:35,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:35,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:35,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:35,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:35,768 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2018-10-22 15:36:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:35,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:35,852 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 15:36:35,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:35,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:36,455 WARN L179 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2018-10-22 15:36:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 15:36:36,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:36,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2018-10-22 15:36:36,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:36:36,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:36:36,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:36:36,510 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 9 states. [2018-10-22 15:36:36,951 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2018-10-22 15:36:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:37,274 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-10-22 15:36:37,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:36:37,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2018-10-22 15:36:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:37,279 INFO L225 Difference]: With dead ends: 38 [2018-10-22 15:36:37,279 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:36:37,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:36:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:36:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 15. [2018-10-22 15:36:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-22 15:36:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-22 15:36:37,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-10-22 15:36:37,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:37,286 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-22 15:36:37,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:36:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-22 15:36:37,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-22 15:36:37,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:37,288 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:37,288 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:37,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1173277513, now seen corresponding path program 1 times [2018-10-22 15:36:37,289 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:37,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:37,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:37,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:37,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:37,826 WARN L179 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 26 [2018-10-22 15:36:38,106 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 20 [2018-10-22 15:36:38,380 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 24 [2018-10-22 15:36:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:38,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:38,384 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 15:36:38,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:38,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:38,486 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2018-10-22 15:36:38,489 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 15:36:38,490 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:38,520 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:38,527 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 32 [2018-10-22 15:36:38,531 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 15:36:38,531 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:38,544 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:40,600 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:40,601 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:112, output treesize:25 [2018-10-22 15:36:40,649 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2018-10-22 15:36:40,654 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 1 [2018-10-22 15:36:40,654 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:40,658 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:40,681 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2018-10-22 15:36:40,687 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2018-10-22 15:36:40,688 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:40,693 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:40,707 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 15:36:40,708 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:65, output treesize:27 [2018-10-22 15:36:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:40,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:40,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2018-10-22 15:36:40,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:36:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:36:40,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:36:40,762 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-22 15:36:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:40,961 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-22 15:36:40,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:36:40,961 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-22 15:36:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:40,962 INFO L225 Difference]: With dead ends: 26 [2018-10-22 15:36:40,962 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 15:36:40,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:36:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 15:36:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2018-10-22 15:36:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-22 15:36:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-22 15:36:40,967 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-10-22 15:36:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:40,968 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-22 15:36:40,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:36:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-22 15:36:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 15:36:40,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:40,969 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:40,969 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:40,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1924498913, now seen corresponding path program 2 times [2018-10-22 15:36:40,969 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:40,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:40,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:40,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:40,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:41,688 WARN L179 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 35 [2018-10-22 15:36:41,907 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 44 [2018-10-22 15:36:42,221 WARN L179 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 41 [2018-10-22 15:36:42,452 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 50 [2018-10-22 15:36:44,885 WARN L179 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 169 DAG size of output: 46 [2018-10-22 15:36:45,144 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 29 [2018-10-22 15:36:45,480 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 24 [2018-10-22 15:36:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:45,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:45,533 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 15:36:45,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:36:45,585 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:36:45,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:45,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:45,601 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2018-10-22 15:36:45,604 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 15:36:45,604 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:45,621 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:45,626 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 32 [2018-10-22 15:36:45,630 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 15:36:45,630 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:45,643 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:47,692 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:47,693 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:112, output treesize:25 [2018-10-22 15:36:48,085 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2018-10-22 15:36:48,090 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2018-10-22 15:36:48,091 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:48,105 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:48,146 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2018-10-22 15:36:48,194 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:36:48,218 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 45 [2018-10-22 15:36:48,219 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:48,358 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:48,693 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 15:36:48,694 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:105, output treesize:65 [2018-10-22 15:36:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:49,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:49,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-10-22 15:36:49,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:36:49,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:36:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:36:49,060 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 18 states. [2018-10-22 15:36:49,435 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2018-10-22 15:36:49,611 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2018-10-22 15:36:49,831 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2018-10-22 15:36:50,019 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2018-10-22 15:36:50,385 WARN L179 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2018-10-22 15:36:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:50,863 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-10-22 15:36:50,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:36:50,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-22 15:36:50,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:50,865 INFO L225 Difference]: With dead ends: 34 [2018-10-22 15:36:50,865 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 15:36:50,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:36:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 15:36:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-22 15:36:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 15:36:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-22 15:36:50,871 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2018-10-22 15:36:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:50,871 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-22 15:36:50,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:36:50,872 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-22 15:36:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:36:50,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:50,872 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:50,872 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:50,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1323748853, now seen corresponding path program 3 times [2018-10-22 15:36:50,873 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:50,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:50,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:50,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:50,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:51,452 WARN L179 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 47 [2018-10-22 15:36:51,923 WARN L179 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 44 [2018-10-22 15:36:52,207 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 47 [2018-10-22 15:36:52,791 WARN L179 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 36 [2018-10-22 15:36:53,164 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 31 [2018-10-22 15:36:53,498 WARN L179 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 43 [2018-10-22 15:36:53,731 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 28 [2018-10-22 15:36:53,948 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 31 [2018-10-22 15:36:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:54,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:54,017 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 15:36:54,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:37:09,808 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:37:09,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:09,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:09,857 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:37:09,858 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,872 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:37:09,872 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,887 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:37:09,888 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,904 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:37:09,904 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,915 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:37:09,915 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:09,929 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:37:09,929 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:12,165 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2018-10-22 15:37:12,169 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 15:37:12,170 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:14,199 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:14,204 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 40 [2018-10-22 15:37:14,210 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 15:37:14,211 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:14,227 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:14,306 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-10-22 15:37:14,307 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:1168, output treesize:84 [2018-10-22 15:37:14,925 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2018-10-22 15:37:17,230 WARN L179 SmtUtils]: Spent 2.25 s on a formula simplification that was a NOOP. DAG size: 42 [2018-10-22 15:37:17,730 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-10-22 15:37:18,017 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2018-10-22 15:37:21,065 WARN L179 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 50 [2018-10-22 15:37:24,535 WARN L179 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-10-22 15:37:24,555 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 66 [2018-10-22 15:37:24,563 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:24,575 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 89 [2018-10-22 15:37:24,576 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:24,617 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:24,752 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2018-10-22 15:37:24,757 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:24,758 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:24,758 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:24,765 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 109 [2018-10-22 15:37:24,766 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:24,802 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:24,891 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-10-22 15:37:24,891 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:149, output treesize:127 [2018-10-22 15:37:27,326 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2018-10-22 15:37:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:27,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:27,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2018-10-22 15:37:27,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:37:27,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:37:27,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:37:27,355 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-10-22 15:37:28,894 WARN L179 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2018-10-22 15:37:29,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:29,091 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-10-22 15:37:29,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:37:29,093 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-22 15:37:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:29,094 INFO L225 Difference]: With dead ends: 38 [2018-10-22 15:37:29,094 INFO L226 Difference]: Without dead ends: 28 [2018-10-22 15:37:29,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:37:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-22 15:37:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-22 15:37:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-22 15:37:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-22 15:37:29,101 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2018-10-22 15:37:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:29,102 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-22 15:37:29,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:37:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-22 15:37:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-22 15:37:29,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:29,103 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:29,103 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:29,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:29,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994443, now seen corresponding path program 4 times [2018-10-22 15:37:29,103 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:29,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:29,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:29,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:29,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:29,472 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2018-10-22 15:37:30,245 WARN L179 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 54 [2018-10-22 15:37:32,457 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 48 [2018-10-22 15:37:38,391 WARN L179 SmtUtils]: Spent 3.69 s on a formula simplification. DAG size of input: 111 DAG size of output: 64 [2018-10-22 15:37:39,055 WARN L179 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2018-10-22 15:37:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:39,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:39,172 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 15:37:39,179 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:37:39,240 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:37:39,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:39,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:39,261 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2018-10-22 15:37:39,265 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 15:37:39,265 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:39,279 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:39,283 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 32 [2018-10-22 15:37:39,291 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 15:37:39,292 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:39,305 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:41,350 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:41,351 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:112, output treesize:25 [2018-10-22 15:37:41,754 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2018-10-22 15:37:41,757 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:41,758 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:41,762 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 69 [2018-10-22 15:37:41,763 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:41,778 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:41,858 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2018-10-22 15:37:41,863 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2018-10-22 15:37:41,864 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:41,876 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:41,901 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:37:41,902 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:97, output treesize:75 [2018-10-22 15:37:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:42,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:42,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2018-10-22 15:37:42,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:37:42,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:37:42,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=375, Unknown=1, NotChecked=0, Total=420 [2018-10-22 15:37:42,124 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 21 states. [2018-10-22 15:37:44,530 WARN L179 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2018-10-22 15:37:44,793 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2018-10-22 15:37:45,074 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2018-10-22 15:37:45,498 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2018-10-22 15:37:45,727 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2018-10-22 15:37:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:46,733 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2018-10-22 15:37:46,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:37:46,734 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2018-10-22 15:37:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:46,735 INFO L225 Difference]: With dead ends: 42 [2018-10-22 15:37:46,735 INFO L226 Difference]: Without dead ends: 32 [2018-10-22 15:37:46,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=116, Invalid=939, Unknown=1, NotChecked=0, Total=1056 [2018-10-22 15:37:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-22 15:37:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-10-22 15:37:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-22 15:37:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-22 15:37:46,743 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2018-10-22 15:37:46,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:46,743 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-22 15:37:46,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:37:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-22 15:37:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-22 15:37:46,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:46,745 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:46,745 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:46,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:46,745 INFO L82 PathProgramCache]: Analyzing trace with hash -112682145, now seen corresponding path program 5 times [2018-10-22 15:37:46,745 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:46,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:46,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:46,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:46,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:47,495 WARN L179 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 49 [2018-10-22 15:37:47,718 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 52 [2018-10-22 15:37:47,921 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 52 [2018-10-22 15:37:48,222 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 52 [2018-10-22 15:37:48,581 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 42 [2018-10-22 15:37:51,058 WARN L179 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 129 DAG size of output: 52 [2018-10-22 15:37:52,529 WARN L179 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 129 DAG size of output: 53 [2018-10-22 15:37:54,555 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse3 (div c_ULTIMATE.start_linear_search_~j~0 4294967296))) (let ((.cse28 (+ .cse3 1))) (and (let ((.cse7 (div c_~SIZE~0 4294967296))) (let ((.cse29 (+ .cse7 1))) (let ((.cse0 (or (< 0 .cse29) (<= 0 .cse7))) (.cse1 (<= .cse29 0))) (or (and .cse0 .cse1) (let ((.cse4 (div c_ULTIMATE.start_linear_search_~n 4294967296)) (.cse16 (* 4294967296 .cse7))) (let ((.cse2 (+ c_ULTIMATE.start_linear_search_~n .cse16)) (.cse6 (* 4294967296 .cse4))) (and (= c_~SIZE~0 .cse2) (or (< .cse3 .cse4) (not |c_ULTIMATE.start_linear_search_#t~short1|) (let ((.cse5 (+ .cse4 1))) (and (or (< .cse3 .cse5) (and (or (<= .cse2 (+ .cse6 c_~SIZE~0 4294967295)) (< 0 .cse3)) (<= .cse3 0))) (or (and .cse0 (or (and (or (<= (* 4294967296 .cse3) c_ULTIMATE.start_linear_search_~j~0) (< 0 .cse7)) (<= .cse7 0) (or (let ((.cse14 (div (+ c_~SIZE~0 (* (- 4294967296) .cse7)) 2)) (.cse26 (= (* 2 (div c_~SIZE~0 2)) c_~SIZE~0)) (.cse27 (<= .cse16 c_~SIZE~0))) (let ((.cse12 (or .cse26 .cse27)) (.cse8 (+ .cse14 2)) (.cse11 (+ .cse14 1)) (.cse9 (not .cse26)) (.cse10 (< c_~SIZE~0 .cse16))) (and (or (and (<= .cse8 0) .cse9 .cse10) (and (<= .cse11 0) .cse12) (let ((.cse13 (+ c_~SIZE~0 4))) (and (<= c_ULTIMATE.start_linear_search_~j~0 .cse13) (let ((.cse15 (div .cse14 4294967296)) (.cse25 (div .cse11 4294967296))) (let ((.cse17 (* (- 8589934592) .cse4)) (.cse18 (* 8589934592 .cse3)) (.cse23 (* 17179869184 .cse25)) (.cse20 (* 2 c_ULTIMATE.start_linear_search_~n)) (.cse21 (* (- 2) c_~SIZE~0)) (.cse22 (* 8589934592 .cse7)) (.cse19 (* 17179869184 .cse15)) (.cse24 (* (- 4) .cse14))) (or (< 2 .cse14) (and .cse12 (<= (+ (* 8589934592 .cse15) c_ULTIMATE.start_linear_search_~j~0 .cse16) (+ (* 8589934592 (div (+ .cse17 .cse18 .cse19 .cse20 c_ULTIMATE.start_linear_search_~a.offset .cse21 .cse22 (- 1)) 17179869184)) c_~SIZE~0 4))) (and (<= (+ (* 4294967296 (div (+ .cse23 c_ULTIMATE.start_linear_search_~a.offset .cse24 17179869192) 17179869184)) .cse14) (+ (* 4294967296 .cse25) 4294967294)) .cse9 .cse10) (and (<= (+ (* 8589934592 .cse25) c_ULTIMATE.start_linear_search_~j~0 .cse16) (+ (* 8589934592 (div (+ .cse17 .cse18 .cse23 .cse20 c_ULTIMATE.start_linear_search_~a.offset .cse21 .cse22 (- 1)) 17179869184)) c_~SIZE~0 4)) .cse9 .cse10) (and (<= (+ (* 4294967296 (div (+ .cse19 c_ULTIMATE.start_linear_search_~a.offset .cse24 17179869192) 17179869184)) .cse14) (+ (* 4294967296 .cse15) 4294967295)) .cse12)))) (or (<= (+ c_ULTIMATE.start_linear_search_~j~0 .cse16 (* 2 .cse14)) .cse13) (<= .cse14 2))))) (= c_ULTIMATE.start_linear_search_~a.offset 0) (or (and (<= 0 .cse14) .cse12) (and (or .cse26 .cse27 (< 0 .cse8)) (or (and .cse9 .cse10) (< 0 .cse11))) (and (<= 0 .cse11) .cse9 .cse10))))) (<= (+ .cse6 c_~SIZE~0 1) .cse2))) .cse1)) (<= .cse5 .cse3))))) (or (<= (+ .cse6 c_~SIZE~0) (+ c_ULTIMATE.start_linear_search_~n .cse16 2147483647)) (<= .cse4 .cse3))))) (<= .cse28 0))))) (or (< 0 .cse28) (<= 0 .cse3))))) is different from false [2018-10-22 15:37:55,162 WARN L179 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 29 [2018-10-22 15:37:55,522 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 31 [2018-10-22 15:37:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2018-10-22 15:37:55,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:55,628 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 15:37:55,635 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:38:15,947 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:38:15,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unknown [2018-10-22 15:38:16,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:38:16,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-22 15:38:16,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:38:16,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:38:16,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=111, Unknown=1, NotChecked=20, Total=156 [2018-10-22 15:38:16,260 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 13 states. [2018-10-22 15:38:18,049 WARN L179 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 164 DAG size of output: 53 [2018-10-22 15:38:18,426 WARN L179 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 23 [2018-10-22 15:38:18,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:38:18,524 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2018-10-22 15:38:18,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:38:18,527 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2018-10-22 15:38:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:38:18,528 INFO L225 Difference]: With dead ends: 46 [2018-10-22 15:38:18,528 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 15:38:18,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=42, Invalid=201, Unknown=1, NotChecked=28, Total=272 [2018-10-22 15:38:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 15:38:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-22 15:38:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 15:38:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-22 15:38:18,536 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2018-10-22 15:38:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:38:18,536 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-22 15:38:18,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:38:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-22 15:38:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-22 15:38:18,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:38:18,537 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:38:18,538 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:38:18,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:38:18,538 INFO L82 PathProgramCache]: Analyzing trace with hash -452372343, now seen corresponding path program 6 times [2018-10-22 15:38:18,538 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:38:18,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:38:18,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:38:18,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:38:18,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:38:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:38:21,124 WARN L179 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 119 DAG size of output: 45 [2018-10-22 15:38:21,428 WARN L179 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 42 [2018-10-22 15:38:25,620 WARN L179 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 141 DAG size of output: 46 [2018-10-22 15:38:27,821 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 45 [2018-10-22 15:38:30,052 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 46 [2018-10-22 15:38:32,414 WARN L179 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 63 [2018-10-22 15:38:34,761 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 54 [2018-10-22 15:38:37,230 WARN L179 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 58 [2018-10-22 15:38:42,147 WARN L179 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 152 DAG size of output: 57 [2018-10-22 15:38:44,559 WARN L179 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 44 [2018-10-22 15:38:50,884 WARN L179 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2018-10-22 15:38:57,117 WARN L179 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 110 DAG size of output: 37 [2018-10-22 15:38:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:38:57,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:38:57,426 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 15:38:57,433 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:00,191 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:40:00,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unknown [2018-10-22 15:40:00,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-22 15:40:00,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-22 15:40:00,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:40:00,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:40:00,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=194, Unknown=9, NotChecked=0, Total=240 [2018-10-22 15:40:00,800 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 16 states. [2018-10-22 15:40:15,033 WARN L179 SmtUtils]: Spent 14.17 s on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2018-10-22 15:40:27,698 WARN L179 SmtUtils]: Spent 8.19 s on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2018-10-22 15:40:30,935 WARN L179 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2018-10-22 15:40:33,220 WARN L179 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 75 DAG size of output: 25 [2018-10-22 15:40:45,551 WARN L179 SmtUtils]: Spent 12.24 s on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2018-10-22 15:40:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:47,640 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2018-10-22 15:40:47,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:40:47,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2018-10-22 15:40:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:47,645 INFO L225 Difference]: With dead ends: 46 [2018-10-22 15:40:47,647 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 15:40:47,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 78.6s TimeCoverageRelationStatistics Valid=66, Invalid=345, Unknown=9, NotChecked=0, Total=420 [2018-10-22 15:40:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 15:40:47,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-10-22 15:40:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-22 15:40:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-10-22 15:40:47,658 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2018-10-22 15:40:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:47,659 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-10-22 15:40:47,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:40:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-10-22 15:40:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-22 15:40:47,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:47,661 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:47,661 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:47,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1517514931, now seen corresponding path program 7 times [2018-10-22 15:40:47,661 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:47,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:47,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:47,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:47,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:48,757 WARN L179 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 49 [2018-10-22 15:40:48,979 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 51 [2018-10-22 15:40:49,200 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 51 [2018-10-22 15:40:49,412 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 51 [2018-10-22 15:40:49,682 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 53 [2018-10-22 15:40:49,971 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 43 [2018-10-22 15:40:50,301 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 44 [2018-10-22 15:40:50,590 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 51 [2018-10-22 15:40:50,918 WARN L179 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 48 [2018-10-22 15:40:51,252 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 47 [2018-10-22 15:40:51,565 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 48 [2018-10-22 15:40:53,421 WARN L179 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 39 [2018-10-22 15:40:54,103 WARN L179 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 39 [2018-10-22 15:40:55,695 WARN L179 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 42 [2018-10-22 15:40:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:55,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:55,833 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 15:40:55,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:56,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:56,018 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2018-10-22 15:40:56,021 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 15:40:56,021 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:40:56,042 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:40:56,047 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-10-22 15:40:56,050 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 15:40:56,050 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:40:56,066 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:40:56,073 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2018-10-22 15:40:56,075 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 15:40:56,075 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-22 15:40:56,095 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:40:56,098 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2018-10-22 15:40:56,107 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 15:40:56,107 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-22 15:40:56,128 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:41:02,246 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:41:02,246 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:292, output treesize:74 [2018-10-22 15:41:04,932 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2018-10-22 15:41:05,996 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2018-10-22 15:41:06,011 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:41:06,014 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 57 [2018-10-22 15:41:06,014 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:41:06,033 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:41:06,147 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2018-10-22 15:41:06,152 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:41:06,154 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 57 [2018-10-22 15:41:06,155 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:41:06,182 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:41:06,285 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2018-10-22 15:41:06,292 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2018-10-22 15:41:06,293 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-22 15:41:06,312 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:41:06,388 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2018-10-22 15:41:06,391 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:41:06,392 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 53 [2018-10-22 15:41:06,393 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-22 15:41:06,405 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:41:06,462 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-22 15:41:06,462 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:257, output treesize:77 [2018-10-22 15:41:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:07,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:07,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2018-10-22 15:41:07,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:41:07,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:41:07,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=863, Unknown=1, NotChecked=0, Total=930 [2018-10-22 15:41:07,335 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 31 states. [2018-10-22 15:41:07,952 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-10-22 15:41:08,175 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2018-10-22 15:41:09,257 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2018-10-22 15:41:09,720 WARN L179 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2018-10-22 15:41:10,157 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2018-10-22 15:41:10,870 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 Received shutdown request... [2018-10-22 15:41:11,252 WARN L187 SmtUtils]: Removed 12 from assertion stack [2018-10-22 15:41:11,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:41:11,253 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:41:11,257 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:41:11,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:41:11 BoogieIcfgContainer [2018-10-22 15:41:11,258 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:41:11,258 INFO L168 Benchmark]: Toolchain (without parser) took 278773.45 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 953.7 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -659.1 MB). Peak memory consumption was 294.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:41:11,259 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:41:11,259 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.91 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 15:41:11,260 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.46 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 15:41:11,260 INFO L168 Benchmark]: Boogie Preprocessor took 26.18 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 15:41:11,260 INFO L168 Benchmark]: RCFGBuilder took 474.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 742.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -782.6 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:41:11,261 INFO L168 Benchmark]: TraceAbstraction took 277879.71 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 210.8 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 113.0 MB). Peak memory consumption was 323.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:41:11,263 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 350.91 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 37.46 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 26.18 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 474.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 742.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -782.6 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 277879.71 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 210.8 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 113.0 MB). Peak memory consumption was 323.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (39states) and FLOYD_HOARE automaton (currently 14 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 70. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. TIMEOUT Result, 277.8s OverallTime, 11 OverallIterations, 8 TraceHistogramMax, 62.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 128 SDtfs, 108 SDslu, 784 SDs, 0 SdLazy, 1675 SolverSat, 79 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 9.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 294 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 181 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 145.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 19 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 99.4s SatisfiabilityAnalysisTime, 114.0s InterpolantComputationTime, 419 NumberOfCodeBlocks, 419 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 338 ConstructedInterpolants, 15 QuantifiedInterpolants, 500205 SizeOfPredicates, 141 NumberOfNonLiveVariables, 749 ConjunctsInSsa, 333 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 26/536 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown