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 0.1.23-0fd1304 [2018-10-23 15:40:07,117 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 15:40:07,123 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 15:40:07,138 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 15:40:07,138 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 15:40:07,139 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 15:40:07,141 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 15:40:07,142 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 15:40:07,144 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 15:40:07,145 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 15:40:07,146 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 15:40:07,146 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 15:40:07,147 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 15:40:07,148 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 15:40:07,149 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 15:40:07,150 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 15:40:07,151 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 15:40:07,152 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 15:40:07,154 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 15:40:07,156 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 15:40:07,157 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 15:40:07,158 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 15:40:07,160 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 15:40:07,168 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 [2018-10-23 15:40:07,192 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 15:40:07,193 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 15:40:07,193 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 15:40:07,194 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 15:40:07,194 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 15:40:07,194 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 15:40:07,195 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 15:40:07,196 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 15:40:07,196 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 15:40:07,196 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 15:40:07,196 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 15:40:07,196 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 15:40:07,196 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 15:40:07,197 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 15:40:07,197 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 15:40:07,197 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 15:40:07,197 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 15:40:07,197 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 15:40:07,198 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 15:40:07,198 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 15:40:07,198 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 15:40:07,198 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 15:40:07,198 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 15:40:07,198 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 15:40:07,200 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 15:40:07,200 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 15:40:07,200 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 15:40:07,200 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 15:40:07,267 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 15:40:07,279 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 15:40:07,283 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 15:40:07,284 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 15:40:07,285 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 15:40:07,286 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-10-23 15:40:07,357 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/72f6bdbea/c9ad5685db594b7983d151912362b98e/FLAG71b6b1039 [2018-10-23 15:40:07,784 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 15:40:07,785 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-10-23 15:40:07,790 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/72f6bdbea/c9ad5685db594b7983d151912362b98e/FLAG71b6b1039 [2018-10-23 15:40:07,805 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/72f6bdbea/c9ad5685db594b7983d151912362b98e [2018-10-23 15:40:07,815 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 15:40:07,816 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 15:40:07,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 15:40:07,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 15:40:07,821 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 15:40:07,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 03:40:07" (1/1) ... [2018-10-23 15:40:07,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c0d6973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:07, skipping insertion in model container [2018-10-23 15:40:07,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 03:40:07" (1/1) ... [2018-10-23 15:40:07,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 15:40:07,860 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 15:40:08,096 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 15:40:08,110 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 15:40:08,134 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 15:40:08,153 INFO L193 MainTranslator]: Completed translation [2018-10-23 15:40:08,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08 WrapperNode [2018-10-23 15:40:08,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 15:40:08,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 15:40:08,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 15:40:08,155 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 15:40:08,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08" (1/1) ... [2018-10-23 15:40:08,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08" (1/1) ... [2018-10-23 15:40:08,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 15:40:08,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 15:40:08,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 15:40:08,200 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 15:40:08,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08" (1/1) ... [2018-10-23 15:40:08,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08" (1/1) ... [2018-10-23 15:40:08,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08" (1/1) ... [2018-10-23 15:40:08,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08" (1/1) ... [2018-10-23 15:40:08,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08" (1/1) ... [2018-10-23 15:40:08,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08" (1/1) ... [2018-10-23 15:40:08,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08" (1/1) ... [2018-10-23 15:40:08,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 15:40:08,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 15:40:08,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 15:40:08,235 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 15:40:08,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08" (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 [2018-10-23 15:40:08,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 15:40:08,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 15:40:08,745 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 15:40:08,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 03:40:08 BoogieIcfgContainer [2018-10-23 15:40:08,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 15:40:08,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 15:40:08,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 15:40:08,752 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 15:40:08,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 03:40:07" (1/3) ... [2018-10-23 15:40:08,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccead9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 03:40:08, skipping insertion in model container [2018-10-23 15:40:08,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:40:08" (2/3) ... [2018-10-23 15:40:08,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccead9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 03:40:08, skipping insertion in model container [2018-10-23 15:40:08,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 03:40:08" (3/3) ... [2018-10-23 15:40:08,757 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_sea.ch_true-unreach-call.i [2018-10-23 15:40:08,765 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 15:40:08,774 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 15:40:08,792 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 15:40:08,825 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 15:40:08,826 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 15:40:08,826 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 15:40:08,826 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 15:40:08,827 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 15:40:08,827 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 15:40:08,827 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 15:40:08,827 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 15:40:08,827 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 15:40:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-10-23 15:40:08,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-23 15:40:08,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:40:08,851 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:40:08,853 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:40:08,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:40:08,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1820236248, now seen corresponding path program 1 times [2018-10-23 15:40:08,862 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:40:08,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:40:08,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:08,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:40:08,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:40:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:40:09,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:40:09,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 15:40:09,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 15:40:09,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 15:40:09,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 15:40:09,074 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2018-10-23 15:40:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:40:09,094 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-10-23 15:40:09,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 15:40:09,095 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2018-10-23 15:40:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:40:09,107 INFO L225 Difference]: With dead ends: 24 [2018-10-23 15:40:09,107 INFO L226 Difference]: Without dead ends: 11 [2018-10-23 15:40:09,111 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 [2018-10-23 15:40:09,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-23 15:40:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-23 15:40:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-23 15:40:09,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-10-23 15:40:09,151 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2018-10-23 15:40:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:40:09,153 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-10-23 15:40:09,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 15:40:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-10-23 15:40:09,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-23 15:40:09,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:40:09,154 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:40:09,155 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:40:09,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:40:09,155 INFO L82 PathProgramCache]: Analyzing trace with hash -408476527, now seen corresponding path program 1 times [2018-10-23 15:40:09,156 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:40:09,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:40:09,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:09,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:40:09,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:40:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:40:09,375 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:40:09,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 15:40:09,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 15:40:09,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 15:40:09,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 15:40:09,379 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 4 states. [2018-10-23 15:40:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:40:09,593 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-10-23 15:40:09,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 15:40:09,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-23 15:40:09,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:40:09,596 INFO L225 Difference]: With dead ends: 15 [2018-10-23 15:40:09,596 INFO L226 Difference]: Without dead ends: 11 [2018-10-23 15:40:09,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:40:09,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-23 15:40:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-23 15:40:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-23 15:40:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-23 15:40:09,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-10-23 15:40:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:40:09,603 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-23 15:40:09,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 15:40:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-23 15:40:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-23 15:40:09,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:40:09,605 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:40:09,605 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:40:09,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:40:09,606 INFO L82 PathProgramCache]: Analyzing trace with hash -408416945, now seen corresponding path program 1 times [2018-10-23 15:40:09,606 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:40:09,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:40:09,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:09,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:40:09,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:40:09,934 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-23 15:40:10,078 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2018-10-23 15:40:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:40:10,142 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:40:10,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 15:40:10,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 15:40:10,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 15:40:10,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:40:10,147 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2018-10-23 15:40:10,312 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-23 15:40:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:40:10,364 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-23 15:40:10,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 15:40:10,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-23 15:40:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:40:10,366 INFO L225 Difference]: With dead ends: 20 [2018-10-23 15:40:10,366 INFO L226 Difference]: Without dead ends: 15 [2018-10-23 15:40:10,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 15:40:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-23 15:40:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-23 15:40:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-23 15:40:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-10-23 15:40:10,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2018-10-23 15:40:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:40:10,373 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-10-23 15:40:10,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 15:40:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-10-23 15:40:10,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-23 15:40:10,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:40:10,374 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:40:10,374 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:40:10,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:40:10,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1230535815, now seen corresponding path program 1 times [2018-10-23 15:40:10,375 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:40:10,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:40:10,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:10,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:40:10,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:40:11,112 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2018-10-23 15:40:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:40:11,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:40:11,212 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 [2018-10-23 15:40:11,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:40:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:40:11,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:40:11,743 WARN L179 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2018-10-23 15:40:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-23 15:40:11,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:40:11,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2018-10-23 15:40:11,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 15:40:11,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 15:40:11,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-23 15:40:11,850 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 9 states. [2018-10-23 15:40:12,288 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2018-10-23 15:40:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:40:12,573 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-10-23 15:40:12,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 15:40:12,578 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2018-10-23 15:40:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:40:12,580 INFO L225 Difference]: With dead ends: 38 [2018-10-23 15:40:12,581 INFO L226 Difference]: Without dead ends: 26 [2018-10-23 15:40:12,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-10-23 15:40:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-23 15:40:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 15. [2018-10-23 15:40:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-23 15:40:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-23 15:40:12,588 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-10-23 15:40:12,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:40:12,588 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-23 15:40:12,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 15:40:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-23 15:40:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-23 15:40:12,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:40:12,589 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:40:12,590 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:40:12,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:40:12,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1173277513, now seen corresponding path program 1 times [2018-10-23 15:40:12,591 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:40:12,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:40:12,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:12,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:40:12,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:40:13,221 WARN L179 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 26 [2018-10-23 15:40:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:40:13,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:40:13,576 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 [2018-10-23 15:40:13,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:40:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:40:13,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:40:13,686 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 [2018-10-23 15:40:13,689 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 [2018-10-23 15:40:13,690 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 15:40:13,707 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:40:13,721 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 [2018-10-23 15:40:13,728 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 [2018-10-23 15:40:13,728 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-23 15:40:13,744 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:40:15,808 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:40:15,809 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:112, output treesize:25 [2018-10-23 15:40:15,852 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 [2018-10-23 15:40:15,860 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2018-10-23 15:40:15,860 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 15:40:15,866 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:40:15,888 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 [2018-10-23 15:40:15,894 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 [2018-10-23 15:40:15,895 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-23 15:40:15,930 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:40:15,946 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-23 15:40:15,946 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:65, output treesize:27 [2018-10-23 15:40:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:40:15,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:40:15,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2018-10-23 15:40:15,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 15:40:15,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 15:40:15,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-23 15:40:15,998 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-23 15:40:16,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:40:16,153 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-23 15:40:16,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 15:40:16,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-23 15:40:16,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:40:16,154 INFO L225 Difference]: With dead ends: 26 [2018-10-23 15:40:16,154 INFO L226 Difference]: Without dead ends: 21 [2018-10-23 15:40:16,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-23 15:40:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-23 15:40:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2018-10-23 15:40:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-23 15:40:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-23 15:40:16,160 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-10-23 15:40:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:40:16,160 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-23 15:40:16,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 15:40:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-23 15:40:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-23 15:40:16,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:40:16,161 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:40:16,162 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:40:16,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:40:16,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1924498913, now seen corresponding path program 2 times [2018-10-23 15:40:16,162 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:40:16,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:40:16,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:16,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:40:16,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:40:16,773 WARN L179 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 35 [2018-10-23 15:40:17,015 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 44 [2018-10-23 15:40:17,251 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 41 [2018-10-23 15:40:17,443 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 50 [2018-10-23 15:40:23,813 WARN L179 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 169 DAG size of output: 46 [2018-10-23 15:40:24,103 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 29 [2018-10-23 15:40:24,491 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 24 [2018-10-23 15:40:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:40:24,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:40:24,624 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 [2018-10-23 15:40:24,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:40:24,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:40:24,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:40:24,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:40:24,700 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 [2018-10-23 15:40:24,705 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 [2018-10-23 15:40:24,706 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 15:40:24,722 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:40:24,728 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 [2018-10-23 15:40:24,731 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 [2018-10-23 15:40:24,732 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-23 15:40:24,748 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:40:26,786 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:40:26,786 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:112, output treesize:25 [2018-10-23 15:40:27,150 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 [2018-10-23 15:40:27,155 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 [2018-10-23 15:40:27,156 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 15:40:27,170 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:40:27,207 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 [2018-10-23 15:40:27,226 INFO L700 Elim1Store]: detected not equals via solver [2018-10-23 15:40:27,229 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 [2018-10-23 15:40:27,230 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-23 15:40:27,241 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:40:27,271 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-23 15:40:27,271 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:105, output treesize:65 [2018-10-23 15:40:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:40:27,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:40:27,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-10-23 15:40:27,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-23 15:40:27,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-23 15:40:27,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-10-23 15:40:27,654 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 18 states. [2018-10-23 15:40:27,979 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2018-10-23 15:40:28,237 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2018-10-23 15:40:28,467 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2018-10-23 15:40:28,698 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2018-10-23 15:40:29,024 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2018-10-23 15:40:29,580 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2018-10-23 15:40:30,108 WARN L179 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2018-10-23 15:40:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:40:30,283 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-10-23 15:40:30,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 15:40:30,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-23 15:40:30,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:40:30,285 INFO L225 Difference]: With dead ends: 34 [2018-10-23 15:40:30,285 INFO L226 Difference]: Without dead ends: 24 [2018-10-23 15:40:30,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2018-10-23 15:40:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-23 15:40:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-23 15:40:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-23 15:40:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-23 15:40:30,291 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2018-10-23 15:40:30,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:40:30,291 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-23 15:40:30,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-23 15:40:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-23 15:40:30,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-23 15:40:30,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:40:30,292 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:40:30,292 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:40:30,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:40:30,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1323748853, now seen corresponding path program 3 times [2018-10-23 15:40:30,292 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:40:30,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:40:30,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:30,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:40:30,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:40:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:40:30,785 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 47 [2018-10-23 15:40:31,411 WARN L179 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 44 [2018-10-23 15:40:31,657 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 47 [2018-10-23 15:40:32,159 WARN L179 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 36 [2018-10-23 15:40:32,416 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 31 [2018-10-23 15:40:34,211 WARN L179 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 174 DAG size of output: 43 [2018-10-23 15:40:34,426 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 28 [2018-10-23 15:40:34,648 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 31 [2018-10-23 15:40:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:40:34,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:40:34,785 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 [2018-10-23 15:40:34,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:40:59,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-23 15:40:59,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-10-23 15:40:59,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 15:40:59,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-23 15:40:59,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 15:40:59,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 15:40:59,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-10-23 15:40:59,687 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2018-10-23 15:40:59,989 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2018-10-23 15:41:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:41:00,309 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-10-23 15:41:00,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 15:41:00,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-10-23 15:41:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:41:00,311 INFO L225 Difference]: With dead ends: 38 [2018-10-23 15:41:00,311 INFO L226 Difference]: Without dead ends: 28 [2018-10-23 15:41:00,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-10-23 15:41:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-23 15:41:00,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-23 15:41:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-23 15:41:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-23 15:41:00,320 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2018-10-23 15:41:00,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:41:00,320 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-23 15:41:00,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 15:41:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-23 15:41:00,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-23 15:41:00,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:41:00,322 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:41:00,322 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:41:00,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:41:00,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994443, now seen corresponding path program 4 times [2018-10-23 15:41:00,322 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:41:00,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:41:00,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:41:00,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:41:00,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:41:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:41:00,864 WARN L179 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2018-10-23 15:41:01,038 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 31 [2018-10-23 15:41:03,151 WARN L179 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 94 DAG size of output: 41 [2018-10-23 15:41:03,500 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 54 [2018-10-23 15:41:03,749 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 48 [2018-10-23 15:41:04,424 WARN L179 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 64 [2018-10-23 15:41:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:41:04,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:41:04,747 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 [2018-10-23 15:41:04,755 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:41:04,813 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:41:04,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:41:04,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:41:04,825 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 [2018-10-23 15:41:04,829 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 [2018-10-23 15:41:04,830 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 15:41:04,937 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:41:04,941 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 [2018-10-23 15:41:04,943 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 [2018-10-23 15:41:04,943 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-23 15:41:04,954 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:41:06,990 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:41:06,990 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:112, output treesize:25 [2018-10-23 15:41:07,280 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 [2018-10-23 15:41:07,284 INFO L700 Elim1Store]: detected not equals via solver [2018-10-23 15:41:07,285 INFO L700 Elim1Store]: detected not equals via solver [2018-10-23 15:41:07,290 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 [2018-10-23 15:41:07,291 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 15:41:07,305 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:41:07,345 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 [2018-10-23 15:41:07,352 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 [2018-10-23 15:41:07,353 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-23 15:41:07,517 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:41:07,691 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-23 15:41:07,692 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:97, output treesize:75 [2018-10-23 15:41:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:41:08,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:41:08,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2018-10-23 15:41:08,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-23 15:41:08,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-23 15:41:08,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2018-10-23 15:41:08,680 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 21 states. [2018-10-23 15:41:11,536 WARN L179 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2018-10-23 15:41:11,905 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2018-10-23 15:41:12,356 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2018-10-23 15:41:13,470 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 22 [2018-10-23 15:41:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:41:13,804 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2018-10-23 15:41:13,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 15:41:13,804 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2018-10-23 15:41:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:41:13,805 INFO L225 Difference]: With dead ends: 42 [2018-10-23 15:41:13,805 INFO L226 Difference]: Without dead ends: 32 [2018-10-23 15:41:13,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 15:41:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-23 15:41:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-10-23 15:41:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-23 15:41:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-23 15:41:13,813 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2018-10-23 15:41:13,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:41:13,814 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-23 15:41:13,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-23 15:41:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-23 15:41:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-23 15:41:13,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:41:13,815 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:41:13,815 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:41:13,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:41:13,815 INFO L82 PathProgramCache]: Analyzing trace with hash -112682145, now seen corresponding path program 5 times [2018-10-23 15:41:13,815 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:41:13,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:41:13,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:41:13,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:41:13,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:41:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:41:14,360 WARN L179 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 49 [2018-10-23 15:41:14,749 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 52 [2018-10-23 15:41:14,953 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 52 [2018-10-23 15:41:15,208 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 52 [2018-10-23 15:41:15,474 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 42 [2018-10-23 15:41:16,264 WARN L179 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 52 [2018-10-23 15:41:20,764 WARN L179 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 129 DAG size of output: 53 [2018-10-23 15:41:21,506 WARN L179 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 48 [2018-10-23 15:41:22,024 WARN L179 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 29 [2018-10-23 15:41:22,388 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 31 [2018-10-23 15:41:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:41:22,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:41:22,503 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 [2018-10-23 15:41:22,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:41:42,875 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-23 15:41:42,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-10-23 15:41:43,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 15:41:43,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-23 15:41:43,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 15:41:43,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 15:41:43,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-10-23 15:41:43,199 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 13 states. [2018-10-23 15:41:46,354 WARN L179 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2018-10-23 15:41:46,578 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 23 [2018-10-23 15:41:46,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:41:46,703 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2018-10-23 15:41:46,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 15:41:46,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2018-10-23 15:41:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:41:46,705 INFO L225 Difference]: With dead ends: 46 [2018-10-23 15:41:46,705 INFO L226 Difference]: Without dead ends: 36 [2018-10-23 15:41:46,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-10-23 15:41:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-23 15:41:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-23 15:41:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-23 15:41:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-23 15:41:46,720 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2018-10-23 15:41:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:41:46,721 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-23 15:41:46,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 15:41:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-23 15:41:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-23 15:41:46,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:41:46,722 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:41:46,722 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:41:46,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:41:46,723 INFO L82 PathProgramCache]: Analyzing trace with hash -452372343, now seen corresponding path program 6 times [2018-10-23 15:41:46,723 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:41:46,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:41:46,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:41:46,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:41:46,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:41:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:41:49,850 WARN L179 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 119 DAG size of output: 45 [2018-10-23 15:41:50,341 WARN L179 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 42 [2018-10-23 15:41:56,548 WARN L179 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 141 DAG size of output: 46 [2018-10-23 15:41:58,904 WARN L179 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 45 [2018-10-23 15:42:01,105 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 46 [2018-10-23 15:42:03,435 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 63 [2018-10-23 15:42:05,779 WARN L179 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 54 [2018-10-23 15:42:08,255 WARN L179 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 58 [2018-10-23 15:42:13,372 WARN L179 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 57 [2018-10-23 15:42:18,592 WARN L179 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 155 DAG size of output: 44 [2018-10-23 15:42:22,925 WARN L179 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2018-10-23 15:42:25,224 WARN L179 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 110 DAG size of output: 37 [2018-10-23 15:42:25,417 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 23 [2018-10-23 15:42:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:42:25,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:42:25,587 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 [2018-10-23 15:42:25,595 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:43:27,370 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-23 15:43:27,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-10-23 15:43:27,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-23 15:43:27,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-23 15:43:27,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 15:43:27,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 15:43:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=193, Unknown=10, NotChecked=0, Total=240 [2018-10-23 15:43:27,488 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 16 states. [2018-10-23 15:43:37,669 WARN L179 SmtUtils]: Spent 10.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2018-10-23 15:43:46,137 WARN L179 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2018-10-23 15:43:48,685 WARN L179 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2018-10-23 15:43:51,042 WARN L179 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 75 DAG size of output: 25 [2018-10-23 15:43:55,393 WARN L179 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2018-10-23 15:43:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:43:55,529 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2018-10-23 15:43:55,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 15:43:55,532 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2018-10-23 15:43:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:43:55,533 INFO L225 Difference]: With dead ends: 46 [2018-10-23 15:43:55,533 INFO L226 Difference]: Without dead ends: 41 [2018-10-23 15:43:55,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=66, Invalid=344, Unknown=10, NotChecked=0, Total=420 [2018-10-23 15:43:55,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-23 15:43:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-10-23 15:43:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-23 15:43:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-10-23 15:43:55,542 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2018-10-23 15:43:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:43:55,542 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-10-23 15:43:55,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 15:43:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-10-23 15:43:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-23 15:43:55,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:43:55,543 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:43:55,544 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:43:55,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:43:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1517514931, now seen corresponding path program 7 times [2018-10-23 15:43:55,544 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:43:55,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:43:55,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:43:55,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:43:55,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:43:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:43:56,808 WARN L179 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 129 DAG size of output: 49 [2018-10-23 15:43:57,062 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 51 [2018-10-23 15:43:57,260 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 51 [2018-10-23 15:43:57,470 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 51 [2018-10-23 15:43:57,750 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 53 [2018-10-23 15:43:58,059 WARN L179 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 43 [2018-10-23 15:43:58,423 WARN L179 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 44 [2018-10-23 15:43:58,696 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 51 [2018-10-23 15:43:59,023 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 48 [2018-10-23 15:44:00,182 WARN L179 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 136 DAG size of output: 47 [2018-10-23 15:44:00,526 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 48 [2018-10-23 15:44:01,285 WARN L179 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 39 [2018-10-23 15:44:03,983 WARN L179 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 152 DAG size of output: 39 [2018-10-23 15:44:04,741 WARN L179 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 42 [2018-10-23 15:44:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:04,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:04,878 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 [2018-10-23 15:44:04,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:05,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:05,071 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 [2018-10-23 15:44:05,074 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 [2018-10-23 15:44:05,074 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:05,091 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:44:05,096 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 [2018-10-23 15:44:05,100 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 [2018-10-23 15:44:05,100 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:05,157 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:44:05,165 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 [2018-10-23 15:44:05,168 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 [2018-10-23 15:44:05,168 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:05,185 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:44:05,189 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 [2018-10-23 15:44:05,192 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 [2018-10-23 15:44:05,193 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:05,209 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:44:13,332 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-23 15:44:13,333 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:292, output treesize:74 [2018-10-23 15:44:14,909 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2018-10-23 15:44:18,194 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2018-10-23 15:44:18,217 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 [2018-10-23 15:44:18,222 INFO L700 Elim1Store]: detected not equals via solver [2018-10-23 15:44:18,224 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 [2018-10-23 15:44:18,224 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:18,250 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:44:18,372 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 [2018-10-23 15:44:18,378 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 [2018-10-23 15:44:18,379 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:18,397 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:44:18,501 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 62 treesize of output 56 [2018-10-23 15:44:18,507 INFO L700 Elim1Store]: detected not equals via solver [2018-10-23 15:44:18,511 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 [2018-10-23 15:44:18,512 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:18,542 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:44:18,639 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 [2018-10-23 15:44:18,645 INFO L700 Elim1Store]: detected not equals via solver [2018-10-23 15:44:18,646 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 [2018-10-23 15:44:18,647 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:18,669 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:44:18,736 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-23 15:44:18,737 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:257, output treesize:77 [2018-10-23 15:44:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:19,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:44:19,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2018-10-23 15:44:19,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-23 15:44:19,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-23 15:44:19,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=863, Unknown=1, NotChecked=0, Total=930 [2018-10-23 15:44:19,620 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 31 states. [2018-10-23 15:44:19,980 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2018-10-23 15:44:20,201 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-10-23 15:44:21,634 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2018-10-23 15:44:22,090 WARN L179 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2018-10-23 15:44:22,793 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2018-10-23 15:44:23,628 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2018-10-23 15:44:23,995 WARN L179 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2018-10-23 15:44:26,021 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2018-10-23 15:44:26,311 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2018-10-23 15:44:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:44:26,926 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2018-10-23 15:44:26,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 15:44:26,927 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2018-10-23 15:44:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:44:26,928 INFO L225 Difference]: With dead ends: 58 [2018-10-23 15:44:26,928 INFO L226 Difference]: Without dead ends: 44 [2018-10-23 15:44:26,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=162, Invalid=2093, Unknown=1, NotChecked=0, Total=2256 [2018-10-23 15:44:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-23 15:44:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-10-23 15:44:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-23 15:44:26,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-23 15:44:26,937 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2018-10-23 15:44:26,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:44:26,937 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-23 15:44:26,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-23 15:44:26,938 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-23 15:44:26,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-23 15:44:26,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:44:26,939 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:44:26,939 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:44:26,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:44:26,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1600218077, now seen corresponding path program 8 times [2018-10-23 15:44:26,939 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:44:26,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:44:26,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:26,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:44:26,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:44:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:44:27,400 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2018-10-23 15:44:27,534 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 37 [2018-10-23 15:44:29,700 WARN L179 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2018-10-23 15:44:29,860 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 39 [2018-10-23 15:44:32,056 WARN L179 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 141 DAG size of output: 43 [2018-10-23 15:44:32,241 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 40 [2018-10-23 15:44:32,647 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 53 [2018-10-23 15:44:33,018 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 40 [2018-10-23 15:44:33,224 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 34 [2018-10-23 15:44:37,419 WARN L179 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 137 DAG size of output: 35 [2018-10-23 15:44:37,626 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 35 [2018-10-23 15:44:38,046 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 23 [2018-10-23 15:44:38,277 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 16 [2018-10-23 15:44:38,511 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 14 [2018-10-23 15:44:40,774 WARN L179 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 119 DAG size of output: 36 [2018-10-23 15:44:43,005 WARN L179 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 118 DAG size of output: 31 [2018-10-23 15:44:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:44:43,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:44:43,024 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:43,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:44:43,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:44:43,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:44:43,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:44:43,225 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 [2018-10-23 15:44:43,227 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 [2018-10-23 15:44:43,228 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:43,247 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:44:43,254 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 [2018-10-23 15:44:43,261 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 [2018-10-23 15:44:43,261 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:43,280 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:44:43,287 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 [2018-10-23 15:44:43,289 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 [2018-10-23 15:44:43,290 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:43,305 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 15:44:43,310 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 [2018-10-23 15:44:43,313 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 [2018-10-23 15:44:43,314 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-23 15:44:43,335 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. Received shutdown request... [2018-10-23 15:44:47,366 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-23 15:44:47,567 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:44:47,567 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 15:44:47,572 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 15:44:47,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 03:44:47 BoogieIcfgContainer [2018-10-23 15:44:47,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 15:44:47,573 INFO L168 Benchmark]: Toolchain (without parser) took 279758.20 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 951.1 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -285.6 MB). Peak memory consumption was 665.5 MB. Max. memory is 7.1 GB. [2018-10-23 15:44:47,574 INFO L168 Benchmark]: CDTParser took 0.24 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. [2018-10-23 15:44:47,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.72 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. [2018-10-23 15:44:47,574 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.95 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. [2018-10-23 15:44:47,575 INFO L168 Benchmark]: Boogie Preprocessor took 35.03 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. [2018-10-23 15:44:47,575 INFO L168 Benchmark]: RCFGBuilder took 510.97 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 730.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -775.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2018-10-23 15:44:47,575 INFO L168 Benchmark]: TraceAbstraction took 278825.91 ms. Allocated memory was 2.2 GB in the beginning and 2.5 GB in the end (delta: 220.7 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 479.2 MB). Peak memory consumption was 699.9 MB. Max. memory is 7.1 GB. [2018-10-23 15:44:47,577 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 336.72 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.95 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 35.03 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 510.97 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 730.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -775.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 278825.91 ms. Allocated memory was 2.2 GB in the beginning and 2.5 GB in the end (delta: 220.7 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 479.2 MB). Peak memory consumption was 699.9 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 analyzing trace of length 43 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 49. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. TIMEOUT Result, 278.7s OverallTime, 12 OverallIterations, 9 TraceHistogramMax, 48.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 136 SDtfs, 111 SDslu, 908 SDs, 0 SdLazy, 1823 SolverSat, 79 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 10.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 120.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=11, 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, 11 MinimizatonAttempts, 20 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 106.9s SatisfiabilityAnalysisTime, 100.7s InterpolantComputationTime, 419 NumberOfCodeBlocks, 419 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 317 ConstructedInterpolants, 0 QuantifiedInterpolants, 458604 SizeOfPredicates, 110 NumberOfNonLiveVariables, 626 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 23/512 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown