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/loop-acceleration/array_false-unreach-call3_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:49:33,306 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:49:33,308 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:49:33,320 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:49:33,320 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:49:33,322 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:49:33,323 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:49:33,325 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:49:33,327 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:49:33,328 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:49:33,329 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:49:33,329 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:49:33,330 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:49:33,332 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:49:33,334 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:49:33,334 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:49:33,339 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:49:33,341 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:49:33,350 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:49:33,354 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:49:33,355 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:49:33,357 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:49:33,359 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:49:33,369 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 [2018-10-24 11:49:33,385 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:49:33,385 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:49:33,386 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:49:33,386 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:49:33,387 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:49:33,387 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:49:33,387 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:49:33,387 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:49:33,388 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:49:33,388 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:49:33,388 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:49:33,388 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:49:33,388 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:49:33,388 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:49:33,389 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:49:33,389 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:49:33,389 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:49:33,389 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:49:33,389 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:49:33,390 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:49:33,390 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:49:33,390 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:49:33,390 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:49:33,390 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:49:33,391 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:49:33,391 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:49:33,391 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:49:33,391 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:49:33,448 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:49:33,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:49:33,469 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:49:33,471 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:49:33,471 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:49:33,472 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call3_true-termination.i [2018-10-24 11:49:33,540 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ad879cdcd/062d16b35eba413fa6bdb98a83632c4f/FLAGd5972f89a [2018-10-24 11:49:33,958 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:49:33,959 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_false-unreach-call3_true-termination.i [2018-10-24 11:49:33,965 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ad879cdcd/062d16b35eba413fa6bdb98a83632c4f/FLAGd5972f89a [2018-10-24 11:49:33,980 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ad879cdcd/062d16b35eba413fa6bdb98a83632c4f [2018-10-24 11:49:33,990 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:49:33,991 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:49:33,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:49:33,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:49:33,997 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:49:33,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:49:33" (1/1) ... [2018-10-24 11:49:34,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128929bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:33, skipping insertion in model container [2018-10-24 11:49:34,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:49:33" (1/1) ... [2018-10-24 11:49:34,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:49:34,033 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:49:34,213 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:49:34,217 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:49:34,242 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:49:34,272 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:49:34,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34 WrapperNode [2018-10-24 11:49:34,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:49:34,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:49:34,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:49:34,274 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:49:34,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34" (1/1) ... [2018-10-24 11:49:34,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34" (1/1) ... [2018-10-24 11:49:34,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:49:34,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:49:34,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:49:34,331 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:49:34,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34" (1/1) ... [2018-10-24 11:49:34,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34" (1/1) ... [2018-10-24 11:49:34,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34" (1/1) ... [2018-10-24 11:49:34,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34" (1/1) ... [2018-10-24 11:49:34,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34" (1/1) ... [2018-10-24 11:49:34,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34" (1/1) ... [2018-10-24 11:49:34,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34" (1/1) ... [2018-10-24 11:49:34,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:49:34,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:49:34,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:49:34,371 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:49:34,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34" (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 [2018-10-24 11:49:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:49:34,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:49:34,903 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:49:34,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:49:34 BoogieIcfgContainer [2018-10-24 11:49:34,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:49:34,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:49:34,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:49:34,908 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:49:34,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:49:33" (1/3) ... [2018-10-24 11:49:34,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8fb824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:49:34, skipping insertion in model container [2018-10-24 11:49:34,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:34" (2/3) ... [2018-10-24 11:49:34,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8fb824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:49:34, skipping insertion in model container [2018-10-24 11:49:34,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:49:34" (3/3) ... [2018-10-24 11:49:34,913 INFO L112 eAbstractionObserver]: Analyzing ICFG array_false-unreach-call3_true-termination.i [2018-10-24 11:49:34,923 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:49:34,931 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:49:34,949 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:49:34,980 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:49:34,981 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:49:34,981 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:49:34,981 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:49:34,982 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:49:34,982 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:49:34,982 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:49:34,982 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:49:34,982 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:49:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-10-24 11:49:35,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-24 11:49:35,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:35,004 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:35,009 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:35,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 413615625, now seen corresponding path program 1 times [2018-10-24 11:49:35,019 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:35,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:35,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:35,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:35,153 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:49:35,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:49:35,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:49:35,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:49:35,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:49:35,172 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2018-10-24 11:49:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:35,190 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-10-24 11:49:35,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:49:35,194 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-10-24 11:49:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:35,205 INFO L225 Difference]: With dead ends: 29 [2018-10-24 11:49:35,205 INFO L226 Difference]: Without dead ends: 13 [2018-10-24 11:49:35,209 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 [2018-10-24 11:49:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-24 11:49:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-24 11:49:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-24 11:49:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-24 11:49:35,247 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2018-10-24 11:49:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:35,247 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-24 11:49:35,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:49:35,248 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-24 11:49:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-24 11:49:35,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:35,248 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:35,249 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:35,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash 654469332, now seen corresponding path program 1 times [2018-10-24 11:49:35,249 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:35,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:35,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:35,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:35,301 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:49:35,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:49:35,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:49:35,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:49:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:49:35,304 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-10-24 11:49:35,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:35,396 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-24 11:49:35,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:49:35,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-10-24 11:49:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:35,397 INFO L225 Difference]: With dead ends: 31 [2018-10-24 11:49:35,397 INFO L226 Difference]: Without dead ends: 23 [2018-10-24 11:49:35,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:49:35,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-24 11:49:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2018-10-24 11:49:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-24 11:49:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-24 11:49:35,403 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-10-24 11:49:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:35,404 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-24 11:49:35,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:49:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-24 11:49:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 11:49:35,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:35,405 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:35,405 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:35,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:35,406 INFO L82 PathProgramCache]: Analyzing trace with hash -556557226, now seen corresponding path program 1 times [2018-10-24 11:49:35,406 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:35,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:35,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:35,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:35,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:35,485 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 [2018-10-24 11:49:35,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:35,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:35,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:35,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-24 11:49:35,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:49:35,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:49:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:49:35,616 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-10-24 11:49:35,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:35,897 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-24 11:49:35,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:49:35,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-24 11:49:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:35,899 INFO L225 Difference]: With dead ends: 41 [2018-10-24 11:49:35,899 INFO L226 Difference]: Without dead ends: 33 [2018-10-24 11:49:35,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:49:35,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-24 11:49:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-10-24 11:49:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 11:49:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-24 11:49:35,908 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-10-24 11:49:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:35,908 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-24 11:49:35,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:49:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-24 11:49:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 11:49:35,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:35,909 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:35,909 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:35,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:35,912 INFO L82 PathProgramCache]: Analyzing trace with hash -523460204, now seen corresponding path program 2 times [2018-10-24 11:49:35,912 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:35,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:35,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:35,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:36,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:36,123 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 [2018-10-24 11:49:36,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:49:36,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-10-24 11:49:36,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:36,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 11:49:36,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 11:49:36,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2018-10-24 11:49:36,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:49:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:49:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:49:36,270 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2018-10-24 11:49:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:36,566 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-10-24 11:49:36,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 11:49:36,567 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-10-24 11:49:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:36,567 INFO L225 Difference]: With dead ends: 45 [2018-10-24 11:49:36,568 INFO L226 Difference]: Without dead ends: 31 [2018-10-24 11:49:36,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:49:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-24 11:49:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2018-10-24 11:49:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-24 11:49:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-24 11:49:36,575 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 16 [2018-10-24 11:49:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:36,575 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-24 11:49:36,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:49:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-24 11:49:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-24 11:49:36,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:36,577 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:36,577 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:36,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:36,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1049275697, now seen corresponding path program 1 times [2018-10-24 11:49:36,578 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:36,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:36,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:36,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:36,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-24 11:49:36,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:36,699 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 [2018-10-24 11:49:36,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:36,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-24 11:49:36,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:36,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-24 11:49:36,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:49:36,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:49:36,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:49:36,844 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2018-10-24 11:49:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:37,064 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-10-24 11:49:37,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:49:37,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-10-24 11:49:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:37,068 INFO L225 Difference]: With dead ends: 57 [2018-10-24 11:49:37,068 INFO L226 Difference]: Without dead ends: 41 [2018-10-24 11:49:37,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:49:37,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-24 11:49:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-24 11:49:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-24 11:49:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-24 11:49:37,074 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2018-10-24 11:49:37,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:37,075 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-24 11:49:37,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:49:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-24 11:49:37,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-24 11:49:37,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:37,076 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:37,077 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:37,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:37,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1713030195, now seen corresponding path program 2 times [2018-10-24 11:49:37,077 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:37,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:37,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:37,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:37,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-24 11:49:37,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:37,484 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 [2018-10-24 11:49:37,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:49:37,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:49:37,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:37,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-24 11:49:37,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:37,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-24 11:49:37,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:49:37,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:49:37,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:49:37,584 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2018-10-24 11:49:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:37,718 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-10-24 11:49:37,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:49:37,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-10-24 11:49:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:37,719 INFO L225 Difference]: With dead ends: 67 [2018-10-24 11:49:37,720 INFO L226 Difference]: Without dead ends: 51 [2018-10-24 11:49:37,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:49:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-24 11:49:37,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2018-10-24 11:49:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-24 11:49:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-24 11:49:37,727 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2018-10-24 11:49:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:37,727 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-24 11:49:37,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:49:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-24 11:49:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-24 11:49:37,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:37,729 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:37,729 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:37,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:37,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1593849329, now seen corresponding path program 3 times [2018-10-24 11:49:37,730 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:37,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:37,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:37,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:37,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-24 11:49:37,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:37,863 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 [2018-10-24 11:49:37,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:49:37,951 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 11:49:37,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:37,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-24 11:49:38,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:38,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2018-10-24 11:49:38,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:49:38,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:49:38,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:49:38,051 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2018-10-24 11:49:38,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:38,557 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2018-10-24 11:49:38,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:49:38,558 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-10-24 11:49:38,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:38,559 INFO L225 Difference]: With dead ends: 71 [2018-10-24 11:49:38,559 INFO L226 Difference]: Without dead ends: 49 [2018-10-24 11:49:38,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:49:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-24 11:49:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2018-10-24 11:49:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-24 11:49:38,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-24 11:49:38,567 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 34 [2018-10-24 11:49:38,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:38,567 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-24 11:49:38,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:49:38,567 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-24 11:49:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-24 11:49:38,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:38,569 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:38,569 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:38,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1158062604, now seen corresponding path program 4 times [2018-10-24 11:49:38,570 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:38,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:38,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:38,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:38,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:49:38,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:38,874 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 [2018-10-24 11:49:38,883 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:49:38,940 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:49:38,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:38,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:49:38,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:38,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-24 11:49:38,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:49:38,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:49:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:49:38,993 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 10 states. [2018-10-24 11:49:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:39,162 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-24 11:49:39,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:49:39,163 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2018-10-24 11:49:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:39,164 INFO L225 Difference]: With dead ends: 84 [2018-10-24 11:49:39,165 INFO L226 Difference]: Without dead ends: 59 [2018-10-24 11:49:39,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:49:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-24 11:49:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2018-10-24 11:49:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-24 11:49:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-10-24 11:49:39,172 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2018-10-24 11:49:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:39,173 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-10-24 11:49:39,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:49:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-10-24 11:49:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-24 11:49:39,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:39,175 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:39,175 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:39,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash 145127542, now seen corresponding path program 5 times [2018-10-24 11:49:39,176 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:39,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:39,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:39,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:39,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:49:39,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:39,826 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 [2018-10-24 11:49:39,834 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:49:39,901 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-24 11:49:39,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:39,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:49:39,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:39,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-24 11:49:39,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:49:39,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:49:39,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:49:39,949 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2018-10-24 11:49:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:40,114 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2018-10-24 11:49:40,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:49:40,115 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-10-24 11:49:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:40,116 INFO L225 Difference]: With dead ends: 94 [2018-10-24 11:49:40,117 INFO L226 Difference]: Without dead ends: 69 [2018-10-24 11:49:40,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:49:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-24 11:49:40,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2018-10-24 11:49:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-24 11:49:40,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-24 11:49:40,125 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2018-10-24 11:49:40,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:40,125 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-24 11:49:40,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:49:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-24 11:49:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-24 11:49:40,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:40,127 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:40,127 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:40,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:40,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1273378484, now seen corresponding path program 6 times [2018-10-24 11:49:40,128 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:40,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:40,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:40,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:40,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:49:40,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:40,337 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 [2018-10-24 11:49:40,348 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:49:40,439 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-24 11:49:40,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:40,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:49:40,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:40,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-24 11:49:40,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:49:40,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:49:40,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:49:40,492 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2018-10-24 11:49:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:40,649 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-24 11:49:40,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:49:40,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-24 11:49:40,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:40,658 INFO L225 Difference]: With dead ends: 104 [2018-10-24 11:49:40,658 INFO L226 Difference]: Without dead ends: 79 [2018-10-24 11:49:40,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:49:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-24 11:49:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2018-10-24 11:49:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-24 11:49:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-24 11:49:40,665 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2018-10-24 11:49:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:40,665 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-24 11:49:40,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:49:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-24 11:49:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-24 11:49:40,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:40,667 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:40,667 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:40,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:40,667 INFO L82 PathProgramCache]: Analyzing trace with hash 583133110, now seen corresponding path program 7 times [2018-10-24 11:49:40,668 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:40,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:40,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:40,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:40,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:49:40,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:40,940 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 [2018-10-24 11:49:40,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:40,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:49:41,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:41,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-24 11:49:41,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:49:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:49:41,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:49:41,049 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 13 states. [2018-10-24 11:49:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:41,242 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-24 11:49:41,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:49:41,243 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-10-24 11:49:41,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:41,244 INFO L225 Difference]: With dead ends: 114 [2018-10-24 11:49:41,245 INFO L226 Difference]: Without dead ends: 89 [2018-10-24 11:49:41,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:49:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-24 11:49:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2018-10-24 11:49:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-24 11:49:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-24 11:49:41,253 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 55 [2018-10-24 11:49:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:41,253 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-24 11:49:41,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:49:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-24 11:49:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-24 11:49:41,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:41,255 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:41,255 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:41,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1786609524, now seen corresponding path program 8 times [2018-10-24 11:49:41,256 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:41,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:41,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:41,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:41,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:49:41,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:41,583 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:41,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:49:41,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:49:41,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:41,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:49:41,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:41,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-24 11:49:41,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:49:41,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:49:41,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:49:41,707 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 14 states. [2018-10-24 11:49:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:41,904 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-10-24 11:49:41,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:49:41,905 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-10-24 11:49:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:41,906 INFO L225 Difference]: With dead ends: 124 [2018-10-24 11:49:41,907 INFO L226 Difference]: Without dead ends: 99 [2018-10-24 11:49:41,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:49:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-24 11:49:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2018-10-24 11:49:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-24 11:49:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-10-24 11:49:41,913 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 58 [2018-10-24 11:49:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:41,914 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-10-24 11:49:41,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:49:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-10-24 11:49:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-24 11:49:41,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:41,915 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:41,915 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:41,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:41,916 INFO L82 PathProgramCache]: Analyzing trace with hash 165471990, now seen corresponding path program 9 times [2018-10-24 11:49:41,916 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:41,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:41,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:41,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:41,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:49:42,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:42,225 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:42,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:49:42,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-24 11:49:42,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:42,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-24 11:49:42,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:42,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 16 [2018-10-24 11:49:42,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:49:42,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:49:42,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:49:42,499 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 16 states. [2018-10-24 11:49:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:42,939 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2018-10-24 11:49:42,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 11:49:42,939 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-10-24 11:49:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:42,941 INFO L225 Difference]: With dead ends: 122 [2018-10-24 11:49:42,941 INFO L226 Difference]: Without dead ends: 85 [2018-10-24 11:49:42,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:49:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-24 11:49:42,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2018-10-24 11:49:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-24 11:49:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-24 11:49:42,950 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 61 [2018-10-24 11:49:42,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:42,950 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-24 11:49:42,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:49:42,951 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-24 11:49:42,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-24 11:49:42,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:42,952 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:42,953 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:42,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:42,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1072616684, now seen corresponding path program 10 times [2018-10-24 11:49:42,953 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:42,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:42,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:42,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:42,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:49:43,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:43,198 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:43,206 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:49:43,284 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:49:43,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:43,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:49:43,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:43,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-24 11:49:43,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:49:43,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:49:43,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:49:43,374 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 16 states. [2018-10-24 11:49:43,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:43,552 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-24 11:49:43,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:49:43,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2018-10-24 11:49:43,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:43,553 INFO L225 Difference]: With dead ends: 138 [2018-10-24 11:49:43,554 INFO L226 Difference]: Without dead ends: 95 [2018-10-24 11:49:43,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:49:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-24 11:49:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2018-10-24 11:49:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-24 11:49:43,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-24 11:49:43,561 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 82 [2018-10-24 11:49:43,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:43,562 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-24 11:49:43,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:49:43,562 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-24 11:49:43,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-24 11:49:43,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:43,564 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:43,564 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:43,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:43,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2114802538, now seen corresponding path program 11 times [2018-10-24 11:49:43,565 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:43,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:43,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:43,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:43,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:49:43,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:43,977 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:43,986 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:49:44,232 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-24 11:49:44,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:44,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:49:44,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:44,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-24 11:49:44,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 11:49:44,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 11:49:44,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:49:44,298 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 17 states. [2018-10-24 11:49:44,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:44,507 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2018-10-24 11:49:44,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:49:44,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-10-24 11:49:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:44,509 INFO L225 Difference]: With dead ends: 148 [2018-10-24 11:49:44,509 INFO L226 Difference]: Without dead ends: 105 [2018-10-24 11:49:44,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:49:44,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-24 11:49:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2018-10-24 11:49:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-24 11:49:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-24 11:49:44,516 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2018-10-24 11:49:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:44,516 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-24 11:49:44,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 11:49:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-24 11:49:44,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-24 11:49:44,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:44,518 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:44,518 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:44,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:44,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1554996268, now seen corresponding path program 12 times [2018-10-24 11:49:44,519 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:44,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:44,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:44,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:44,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:49:44,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:44,776 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:44,784 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:49:45,147 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-24 11:49:45,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:45,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:49:45,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:45,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-24 11:49:45,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 11:49:45,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 11:49:45,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:49:45,204 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 18 states. [2018-10-24 11:49:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:45,412 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-24 11:49:45,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 11:49:45,412 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2018-10-24 11:49:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:45,413 INFO L225 Difference]: With dead ends: 158 [2018-10-24 11:49:45,414 INFO L226 Difference]: Without dead ends: 115 [2018-10-24 11:49:45,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:49:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-24 11:49:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2018-10-24 11:49:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-24 11:49:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-10-24 11:49:45,419 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2018-10-24 11:49:45,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:45,420 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-10-24 11:49:45,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 11:49:45,420 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-10-24 11:49:45,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-24 11:49:45,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:45,421 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:45,422 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:45,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:45,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1724417066, now seen corresponding path program 13 times [2018-10-24 11:49:45,422 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:45,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:45,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:45,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:45,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:49:45,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:45,778 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:45,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:45,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:49:45,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:45,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-24 11:49:45,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:49:45,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:49:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:49:45,912 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 19 states. [2018-10-24 11:49:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:46,138 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-24 11:49:46,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:49:46,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2018-10-24 11:49:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:46,140 INFO L225 Difference]: With dead ends: 168 [2018-10-24 11:49:46,141 INFO L226 Difference]: Without dead ends: 125 [2018-10-24 11:49:46,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:49:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-24 11:49:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 95. [2018-10-24 11:49:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-24 11:49:46,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-24 11:49:46,146 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 91 [2018-10-24 11:49:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:46,146 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-24 11:49:46,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:49:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-24 11:49:46,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-24 11:49:46,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:46,148 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:46,148 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:46,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:46,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1942129812, now seen corresponding path program 14 times [2018-10-24 11:49:46,148 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:46,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:46,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:46,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:46,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:49:47,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:47,413 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:47,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:49:47,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:49:47,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:47,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:49:47,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:47,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-24 11:49:47,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 11:49:47,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 11:49:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:49:47,651 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 20 states. [2018-10-24 11:49:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:47,910 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2018-10-24 11:49:47,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 11:49:47,911 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2018-10-24 11:49:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:47,912 INFO L225 Difference]: With dead ends: 178 [2018-10-24 11:49:47,913 INFO L226 Difference]: Without dead ends: 135 [2018-10-24 11:49:47,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:49:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-24 11:49:47,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2018-10-24 11:49:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 11:49:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-24 11:49:47,917 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 94 [2018-10-24 11:49:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:47,917 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-24 11:49:47,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 11:49:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-24 11:49:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-24 11:49:47,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:47,920 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:47,920 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:47,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1863066858, now seen corresponding path program 15 times [2018-10-24 11:49:47,920 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:47,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:47,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:47,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:47,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:49:48,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:48,368 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:48,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:49:48,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-24 11:49:48,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:48,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-10-24 11:49:48,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:48,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 22 [2018-10-24 11:49:48,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 11:49:48,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 11:49:48,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:49:48,644 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 22 states. [2018-10-24 11:49:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:48,956 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2018-10-24 11:49:48,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 11:49:48,956 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 97 [2018-10-24 11:49:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:48,958 INFO L225 Difference]: With dead ends: 176 [2018-10-24 11:49:48,958 INFO L226 Difference]: Without dead ends: 121 [2018-10-24 11:49:48,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:49:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-24 11:49:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2018-10-24 11:49:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-24 11:49:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-24 11:49:48,963 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 97 [2018-10-24 11:49:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:48,963 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-24 11:49:48,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 11:49:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-24 11:49:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-24 11:49:48,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:48,964 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:48,965 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:48,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:48,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1303130060, now seen corresponding path program 16 times [2018-10-24 11:49:48,965 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:48,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:48,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:48,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:48,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:49:49,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:49,419 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:49,426 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:49:49,536 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:49:49,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:49,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:49:49,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:49,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-24 11:49:49,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 11:49:49,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 11:49:49,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:49:49,612 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 22 states. [2018-10-24 11:49:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:49,856 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2018-10-24 11:49:49,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 11:49:49,857 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 118 [2018-10-24 11:49:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:49,858 INFO L225 Difference]: With dead ends: 192 [2018-10-24 11:49:49,859 INFO L226 Difference]: Without dead ends: 131 [2018-10-24 11:49:49,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:49:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-24 11:49:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 122. [2018-10-24 11:49:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-24 11:49:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2018-10-24 11:49:49,864 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 118 [2018-10-24 11:49:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:49,864 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2018-10-24 11:49:49,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 11:49:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2018-10-24 11:49:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-24 11:49:49,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:49,866 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:49,866 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:49,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:49,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1686255798, now seen corresponding path program 17 times [2018-10-24 11:49:49,866 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:49,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:49,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:49,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:49,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:49:50,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:50,343 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:50,363 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:49:50,853 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-24 11:49:50,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:50,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:49:50,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:50,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-24 11:49:50,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 11:49:50,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 11:49:50,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:49:50,946 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 23 states. [2018-10-24 11:49:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:51,174 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2018-10-24 11:49:51,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 11:49:51,174 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-10-24 11:49:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:51,176 INFO L225 Difference]: With dead ends: 202 [2018-10-24 11:49:51,176 INFO L226 Difference]: Without dead ends: 141 [2018-10-24 11:49:51,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:49:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-24 11:49:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 125. [2018-10-24 11:49:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-24 11:49:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-24 11:49:51,180 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2018-10-24 11:49:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:51,180 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-24 11:49:51,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 11:49:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-24 11:49:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-24 11:49:51,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:51,181 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:51,181 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:51,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:51,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1961498380, now seen corresponding path program 18 times [2018-10-24 11:49:51,182 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:51,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:51,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:51,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:51,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:49:51,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:51,930 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:51,938 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:49:53,212 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-24 11:49:53,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:53,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:49:53,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:53,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-24 11:49:53,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 11:49:53,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 11:49:53,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:49:53,280 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 24 states. [2018-10-24 11:49:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:53,517 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-24 11:49:53,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:49:53,518 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2018-10-24 11:49:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:53,520 INFO L225 Difference]: With dead ends: 212 [2018-10-24 11:49:53,520 INFO L226 Difference]: Without dead ends: 151 [2018-10-24 11:49:53,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:49:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-24 11:49:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 128. [2018-10-24 11:49:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-24 11:49:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2018-10-24 11:49:53,524 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2018-10-24 11:49:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:53,524 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2018-10-24 11:49:53,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 11:49:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2018-10-24 11:49:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-24 11:49:53,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:53,525 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:53,525 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:53,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:53,526 INFO L82 PathProgramCache]: Analyzing trace with hash -943691786, now seen corresponding path program 19 times [2018-10-24 11:49:53,526 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:53,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:53,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:53,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:53,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:49:53,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:53,860 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:53,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:53,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:49:54,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:54,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-24 11:49:54,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:49:54,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:49:54,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:49:54,035 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 25 states. [2018-10-24 11:49:54,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:54,348 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2018-10-24 11:49:54,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 11:49:54,348 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2018-10-24 11:49:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:54,350 INFO L225 Difference]: With dead ends: 222 [2018-10-24 11:49:54,350 INFO L226 Difference]: Without dead ends: 161 [2018-10-24 11:49:54,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:49:54,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-24 11:49:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 131. [2018-10-24 11:49:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-24 11:49:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-24 11:49:54,354 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 127 [2018-10-24 11:49:54,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:54,354 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-24 11:49:54,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:49:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-24 11:49:54,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-24 11:49:54,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:54,355 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:54,355 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:54,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:54,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1936559692, now seen corresponding path program 20 times [2018-10-24 11:49:54,355 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:54,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:54,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:54,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:54,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:49:55,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:55,935 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:55,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:49:56,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:49:56,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:56,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:49:56,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:56,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-24 11:49:56,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 11:49:56,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 11:49:56,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:49:56,108 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 26 states. [2018-10-24 11:49:56,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:56,465 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2018-10-24 11:49:56,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 11:49:56,466 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 130 [2018-10-24 11:49:56,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:56,467 INFO L225 Difference]: With dead ends: 232 [2018-10-24 11:49:56,467 INFO L226 Difference]: Without dead ends: 171 [2018-10-24 11:49:56,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:49:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-24 11:49:56,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 134. [2018-10-24 11:49:56,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-24 11:49:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2018-10-24 11:49:56,472 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2018-10-24 11:49:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:56,472 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2018-10-24 11:49:56,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 11:49:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2018-10-24 11:49:56,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-24 11:49:56,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:56,473 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:56,473 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:56,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:56,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1024579786, now seen corresponding path program 21 times [2018-10-24 11:49:56,474 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:56,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:56,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:56,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:56,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:49:57,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:57,440 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:57,447 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:49:58,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-24 11:49:58,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:58,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-10-24 11:49:58,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:58,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 28 [2018-10-24 11:49:58,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:49:58,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:49:58,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:49:58,696 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 28 states. [2018-10-24 11:49:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:59,150 INFO L93 Difference]: Finished difference Result 230 states and 238 transitions. [2018-10-24 11:49:59,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 11:49:59,150 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 133 [2018-10-24 11:49:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:59,152 INFO L225 Difference]: With dead ends: 230 [2018-10-24 11:49:59,152 INFO L226 Difference]: Without dead ends: 157 [2018-10-24 11:49:59,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=407, Invalid=715, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:49:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-24 11:49:59,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2018-10-24 11:49:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-24 11:49:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-24 11:49:59,159 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 133 [2018-10-24 11:49:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:59,159 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-24 11:49:59,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:49:59,159 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-24 11:49:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-24 11:49:59,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:59,161 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:59,161 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:59,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1464552788, now seen corresponding path program 22 times [2018-10-24 11:49:59,161 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:59,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:59,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:59,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:59,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:50:00,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:00,507 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:00,530 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:50:00,646 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:50:00,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:00,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:50:00,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:00,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-24 11:50:00,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:50:00,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:50:00,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:50:00,703 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 28 states. [2018-10-24 11:50:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:01,661 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2018-10-24 11:50:01,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 11:50:01,662 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2018-10-24 11:50:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:01,663 INFO L225 Difference]: With dead ends: 246 [2018-10-24 11:50:01,663 INFO L226 Difference]: Without dead ends: 167 [2018-10-24 11:50:01,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:50:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-24 11:50:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2018-10-24 11:50:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-24 11:50:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2018-10-24 11:50:01,669 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 154 [2018-10-24 11:50:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:01,670 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2018-10-24 11:50:01,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:50:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2018-10-24 11:50:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-24 11:50:01,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:01,671 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:01,671 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:01,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:01,671 INFO L82 PathProgramCache]: Analyzing trace with hash 866065622, now seen corresponding path program 23 times [2018-10-24 11:50:01,672 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:01,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:01,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:01,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:01,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:50:02,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:02,644 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:02,659 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:50:03,602 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-24 11:50:03,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:03,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:50:03,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:03,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-24 11:50:03,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 11:50:03,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 11:50:03,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:50:03,693 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 29 states. [2018-10-24 11:50:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:04,055 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2018-10-24 11:50:04,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 11:50:04,055 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-10-24 11:50:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:04,057 INFO L225 Difference]: With dead ends: 256 [2018-10-24 11:50:04,057 INFO L226 Difference]: Without dead ends: 177 [2018-10-24 11:50:04,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:50:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-24 11:50:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2018-10-24 11:50:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-24 11:50:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-24 11:50:04,063 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 157 [2018-10-24 11:50:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:04,063 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-24 11:50:04,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 11:50:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-24 11:50:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-24 11:50:04,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:04,064 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:04,065 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:04,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash -255850988, now seen corresponding path program 24 times [2018-10-24 11:50:04,065 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:04,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:04,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:04,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:04,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:50:05,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:05,073 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:05,087 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:50:09,046 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-24 11:50:09,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:09,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-24 11:50:09,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:09,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 31 [2018-10-24 11:50:09,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 11:50:09,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 11:50:09,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:50:09,606 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 31 states. [2018-10-24 11:50:10,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:10,382 INFO L93 Difference]: Finished difference Result 260 states and 265 transitions. [2018-10-24 11:50:10,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 11:50:10,382 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 160 [2018-10-24 11:50:10,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:10,384 INFO L225 Difference]: With dead ends: 260 [2018-10-24 11:50:10,384 INFO L226 Difference]: Without dead ends: 175 [2018-10-24 11:50:10,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=455, Invalid=667, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:50:10,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-24 11:50:10,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2018-10-24 11:50:10,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-24 11:50:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-24 11:50:10,390 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 160 [2018-10-24 11:50:10,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:10,390 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-24 11:50:10,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 11:50:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-24 11:50:10,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-24 11:50:10,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:10,391 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:10,391 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:10,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:10,392 INFO L82 PathProgramCache]: Analyzing trace with hash 793918641, now seen corresponding path program 25 times [2018-10-24 11:50:10,392 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:10,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:10,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:10,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:10,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-24 11:50:12,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:12,800 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:12,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:50:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:12,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-24 11:50:13,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:13,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-24 11:50:13,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 11:50:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 11:50:13,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:50:13,089 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 31 states. [2018-10-24 11:50:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:13,449 INFO L93 Difference]: Finished difference Result 273 states and 275 transitions. [2018-10-24 11:50:13,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 11:50:13,449 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 172 [2018-10-24 11:50:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:13,451 INFO L225 Difference]: With dead ends: 273 [2018-10-24 11:50:13,451 INFO L226 Difference]: Without dead ends: 185 [2018-10-24 11:50:13,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:50:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-24 11:50:13,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 176. [2018-10-24 11:50:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-24 11:50:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2018-10-24 11:50:13,456 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2018-10-24 11:50:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:13,456 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2018-10-24 11:50:13,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 11:50:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2018-10-24 11:50:13,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-24 11:50:13,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:13,458 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:13,458 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:13,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:13,458 INFO L82 PathProgramCache]: Analyzing trace with hash -227151949, now seen corresponding path program 26 times [2018-10-24 11:50:13,458 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:13,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:13,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:13,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:50:13,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-24 11:50:14,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:14,062 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:14,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:50:14,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:50:14,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:14,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-24 11:50:14,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:14,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-24 11:50:14,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 11:50:14,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 11:50:14,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:50:14,275 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 32 states. [2018-10-24 11:50:14,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:14,593 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2018-10-24 11:50:14,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 11:50:14,594 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 175 [2018-10-24 11:50:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:14,596 INFO L225 Difference]: With dead ends: 283 [2018-10-24 11:50:14,596 INFO L226 Difference]: Without dead ends: 195 [2018-10-24 11:50:14,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:50:14,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-24 11:50:14,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 179. [2018-10-24 11:50:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-24 11:50:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-24 11:50:14,602 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 175 [2018-10-24 11:50:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:14,602 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-24 11:50:14,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 11:50:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-24 11:50:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-24 11:50:14,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:14,603 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:14,604 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:14,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:14,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1982708367, now seen corresponding path program 27 times [2018-10-24 11:50:14,604 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:14,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:14,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:14,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:14,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2383 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-24 11:50:15,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:15,370 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:15,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:50:18,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-24 11:50:18,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:18,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2383 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-10-24 11:50:18,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:18,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 34 [2018-10-24 11:50:18,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 11:50:18,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 11:50:18,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:50:18,210 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 34 states. [2018-10-24 11:50:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:18,686 INFO L93 Difference]: Finished difference Result 287 states and 292 transitions. [2018-10-24 11:50:18,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-24 11:50:18,687 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 178 [2018-10-24 11:50:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:18,688 INFO L225 Difference]: With dead ends: 287 [2018-10-24 11:50:18,689 INFO L226 Difference]: Without dead ends: 193 [2018-10-24 11:50:18,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=548, Invalid=784, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:50:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-24 11:50:18,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2018-10-24 11:50:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-24 11:50:18,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-24 11:50:18,694 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 178 [2018-10-24 11:50:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:18,694 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-24 11:50:18,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 11:50:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-24 11:50:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-24 11:50:18,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:18,696 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:18,696 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:18,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:18,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1577165428, now seen corresponding path program 28 times [2018-10-24 11:50:18,696 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:18,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:18,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:18,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:18,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:50:19,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:19,235 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:19,243 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:50:19,386 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:50:19,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:19,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:50:19,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:19,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-24 11:50:19,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 11:50:19,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 11:50:19,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:50:19,458 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 34 states. [2018-10-24 11:50:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:19,797 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2018-10-24 11:50:19,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-24 11:50:19,797 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 190 [2018-10-24 11:50:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:19,799 INFO L225 Difference]: With dead ends: 300 [2018-10-24 11:50:19,799 INFO L226 Difference]: Without dead ends: 203 [2018-10-24 11:50:19,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:50:19,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-24 11:50:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2018-10-24 11:50:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-24 11:50:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2018-10-24 11:50:19,805 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 190 [2018-10-24 11:50:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:19,805 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2018-10-24 11:50:19,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 11:50:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2018-10-24 11:50:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-24 11:50:19,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:19,806 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:19,807 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:19,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:19,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2081642742, now seen corresponding path program 29 times [2018-10-24 11:50:19,807 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:19,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:19,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:19,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:19,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:50:20,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:20,691 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:20,700 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:50:22,403 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-10-24 11:50:22,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:22,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:50:22,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:22,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-24 11:50:22,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 11:50:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 11:50:22,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:50:22,624 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 35 states. [2018-10-24 11:50:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:23,038 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2018-10-24 11:50:23,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 11:50:23,039 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 193 [2018-10-24 11:50:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:23,041 INFO L225 Difference]: With dead ends: 310 [2018-10-24 11:50:23,041 INFO L226 Difference]: Without dead ends: 213 [2018-10-24 11:50:23,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:50:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-24 11:50:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 197. [2018-10-24 11:50:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-24 11:50:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-10-24 11:50:23,047 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 193 [2018-10-24 11:50:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:23,047 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-10-24 11:50:23,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 11:50:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-10-24 11:50:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-24 11:50:23,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:23,048 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:23,049 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:23,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:23,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1420231884, now seen corresponding path program 30 times [2018-10-24 11:50:23,049 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:23,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:23,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:23,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:23,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2917 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:50:23,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:23,811 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:23,818 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:50:46,431 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2018-10-24 11:50:46,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:46,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2917 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:50:46,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:46,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-24 11:50:46,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-24 11:50:46,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-24 11:50:46,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:50:46,541 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 36 states. [2018-10-24 11:50:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:46,876 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2018-10-24 11:50:46,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-24 11:50:46,877 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 196 [2018-10-24 11:50:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:46,878 INFO L225 Difference]: With dead ends: 320 [2018-10-24 11:50:46,878 INFO L226 Difference]: Without dead ends: 223 [2018-10-24 11:50:46,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:50:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-24 11:50:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 200. [2018-10-24 11:50:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-24 11:50:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2018-10-24 11:50:46,883 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 196 [2018-10-24 11:50:46,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:46,883 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2018-10-24 11:50:46,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-24 11:50:46,883 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2018-10-24 11:50:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-24 11:50:46,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:46,884 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:46,885 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:46,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1011595210, now seen corresponding path program 31 times [2018-10-24 11:50:46,885 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:46,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:46,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:46,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:46,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:50:47,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:47,469 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:47,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:50:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:47,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:50:47,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:47,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-24 11:50:47,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 11:50:47,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 11:50:47,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:50:47,794 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand 37 states. [2018-10-24 11:50:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:48,950 INFO L93 Difference]: Finished difference Result 330 states and 332 transitions. [2018-10-24 11:50:48,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-24 11:50:48,951 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 199 [2018-10-24 11:50:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:48,952 INFO L225 Difference]: With dead ends: 330 [2018-10-24 11:50:48,952 INFO L226 Difference]: Without dead ends: 233 [2018-10-24 11:50:48,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:50:48,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-24 11:50:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 203. [2018-10-24 11:50:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-24 11:50:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-24 11:50:48,958 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 199 [2018-10-24 11:50:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:48,958 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-24 11:50:48,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 11:50:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-24 11:50:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-24 11:50:48,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:48,960 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:48,960 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:48,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash 746243060, now seen corresponding path program 32 times [2018-10-24 11:50:48,960 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:48,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:48,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:48,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:50:48,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:50:49,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:49,989 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:49,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:50:50,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:50:50,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:50,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:50:50,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:50,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-24 11:50:50,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-24 11:50:50,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-24 11:50:50,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:50:50,318 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 38 states. [2018-10-24 11:50:50,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:50,720 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2018-10-24 11:50:50,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-24 11:50:50,721 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 202 [2018-10-24 11:50:50,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:50,723 INFO L225 Difference]: With dead ends: 340 [2018-10-24 11:50:50,723 INFO L226 Difference]: Without dead ends: 243 [2018-10-24 11:50:50,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:50:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-24 11:50:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 206. [2018-10-24 11:50:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-24 11:50:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2018-10-24 11:50:50,729 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 202 [2018-10-24 11:50:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:50,729 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2018-10-24 11:50:50,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-24 11:50:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2018-10-24 11:50:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-24 11:50:50,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:50,731 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:50,731 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:50,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:50,731 INFO L82 PathProgramCache]: Analyzing trace with hash -30095498, now seen corresponding path program 33 times [2018-10-24 11:50:50,731 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:50,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:50,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:50,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:50,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3220 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:50:51,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:51,863 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:51,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:50:53,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-10-24 11:50:53,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:53,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3220 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2018-10-24 11:50:54,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:54,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 40 [2018-10-24 11:50:54,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 11:50:54,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 11:50:54,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:50:54,057 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand 40 states. [2018-10-24 11:50:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:54,560 INFO L93 Difference]: Finished difference Result 338 states and 346 transitions. [2018-10-24 11:50:54,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 11:50:54,561 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 205 [2018-10-24 11:50:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:54,563 INFO L225 Difference]: With dead ends: 338 [2018-10-24 11:50:54,563 INFO L226 Difference]: Without dead ends: 229 [2018-10-24 11:50:54,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=797, Invalid=1273, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:50:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-24 11:50:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2018-10-24 11:50:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-24 11:50:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-10-24 11:50:54,569 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 205 [2018-10-24 11:50:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:54,570 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-10-24 11:50:54,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 11:50:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-10-24 11:50:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-24 11:50:54,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:54,571 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:54,571 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:54,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:54,572 INFO L82 PathProgramCache]: Analyzing trace with hash -16724076, now seen corresponding path program 34 times [2018-10-24 11:50:54,572 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:54,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:54,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:54,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:54,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:50:55,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:55,330 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:55,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:50:55,506 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:50:55,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:55,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:50:55,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:55,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-24 11:50:55,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 11:50:55,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 11:50:55,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:50:55,611 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 40 states. [2018-10-24 11:50:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:56,067 INFO L93 Difference]: Finished difference Result 354 states and 356 transitions. [2018-10-24 11:50:56,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 11:50:56,068 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 226 [2018-10-24 11:50:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:56,070 INFO L225 Difference]: With dead ends: 354 [2018-10-24 11:50:56,070 INFO L226 Difference]: Without dead ends: 239 [2018-10-24 11:50:56,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:50:56,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-24 11:50:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 230. [2018-10-24 11:50:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-24 11:50:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2018-10-24 11:50:56,075 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 226 [2018-10-24 11:50:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:56,076 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2018-10-24 11:50:56,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 11:50:56,076 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2018-10-24 11:50:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-24 11:50:56,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:56,077 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:56,078 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:56,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:56,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1948839190, now seen corresponding path program 35 times [2018-10-24 11:50:56,078 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:56,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:56,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:56,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:56,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:50:56,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:56,867 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:56,882 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:50:59,218 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-10-24 11:50:59,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:59,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:50:59,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:59,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-24 11:50:59,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-24 11:50:59,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-24 11:50:59,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:50:59,344 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand 41 states. [2018-10-24 11:50:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:59,827 INFO L93 Difference]: Finished difference Result 364 states and 366 transitions. [2018-10-24 11:50:59,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-24 11:50:59,828 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 229 [2018-10-24 11:50:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:59,829 INFO L225 Difference]: With dead ends: 364 [2018-10-24 11:50:59,829 INFO L226 Difference]: Without dead ends: 249 [2018-10-24 11:50:59,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:50:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-24 11:50:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 233. [2018-10-24 11:50:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-10-24 11:50:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2018-10-24 11:50:59,834 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 229 [2018-10-24 11:50:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:59,834 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2018-10-24 11:50:59,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-24 11:50:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2018-10-24 11:50:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-24 11:50:59,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:59,836 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:59,836 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:59,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash 459982932, now seen corresponding path program 36 times [2018-10-24 11:50:59,837 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:59,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:59,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:59,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:59,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4147 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:51:00,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:00,608 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:00,616 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:52:35,382 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-24 11:52:35,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:35,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4147 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:52:35,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:35,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-24 11:52:35,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-24 11:52:35,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-24 11:52:35,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:52:35,594 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand 42 states. [2018-10-24 11:52:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:36,116 INFO L93 Difference]: Finished difference Result 374 states and 376 transitions. [2018-10-24 11:52:36,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-24 11:52:36,117 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 232 [2018-10-24 11:52:36,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:36,119 INFO L225 Difference]: With dead ends: 374 [2018-10-24 11:52:36,119 INFO L226 Difference]: Without dead ends: 259 [2018-10-24 11:52:36,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:52:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-24 11:52:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 236. [2018-10-24 11:52:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-24 11:52:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2018-10-24 11:52:36,124 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 232 [2018-10-24 11:52:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:36,125 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2018-10-24 11:52:36,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-24 11:52:36,125 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2018-10-24 11:52:36,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-24 11:52:36,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:36,127 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:36,127 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:36,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:36,127 INFO L82 PathProgramCache]: Analyzing trace with hash 70466646, now seen corresponding path program 37 times [2018-10-24 11:52:36,127 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:36,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:36,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:36,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:36,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4263 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:52:36,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:36,943 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:36,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:52:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:37,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4263 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:52:37,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:37,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-24 11:52:37,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 11:52:37,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 11:52:37,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:52:37,228 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand 43 states. [2018-10-24 11:52:37,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:37,755 INFO L93 Difference]: Finished difference Result 384 states and 386 transitions. [2018-10-24 11:52:37,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-24 11:52:37,755 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 235 [2018-10-24 11:52:37,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:37,756 INFO L225 Difference]: With dead ends: 384 [2018-10-24 11:52:37,757 INFO L226 Difference]: Without dead ends: 269 [2018-10-24 11:52:37,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:52:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-24 11:52:37,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 239. [2018-10-24 11:52:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-24 11:52:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-10-24 11:52:37,763 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 235 [2018-10-24 11:52:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:37,763 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-10-24 11:52:37,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 11:52:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-10-24 11:52:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-24 11:52:37,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:37,765 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:37,765 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:37,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash 992424212, now seen corresponding path program 38 times [2018-10-24 11:52:37,765 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:37,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:37,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:37,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:52:37,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:52:38,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:38,673 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:38,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:52:38,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:52:38,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:38,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:52:38,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:38,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-24 11:52:38,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-24 11:52:38,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-24 11:52:38,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:52:38,958 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 44 states. [2018-10-24 11:52:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:39,692 INFO L93 Difference]: Finished difference Result 394 states and 396 transitions. [2018-10-24 11:52:39,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-24 11:52:39,693 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 238 [2018-10-24 11:52:39,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:39,694 INFO L225 Difference]: With dead ends: 394 [2018-10-24 11:52:39,695 INFO L226 Difference]: Without dead ends: 279 [2018-10-24 11:52:39,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:52:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-24 11:52:39,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 242. [2018-10-24 11:52:39,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-10-24 11:52:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2018-10-24 11:52:39,700 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 238 [2018-10-24 11:52:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:39,700 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2018-10-24 11:52:39,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-24 11:52:39,701 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2018-10-24 11:52:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-24 11:52:39,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:39,702 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:39,702 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:39,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:39,703 INFO L82 PathProgramCache]: Analyzing trace with hash 714414998, now seen corresponding path program 39 times [2018-10-24 11:52:39,703 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:39,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:39,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:39,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:39,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4504 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:52:41,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:41,192 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:41,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:52:58,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2018-10-24 11:52:58,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:58,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4504 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2018-10-24 11:52:58,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:58,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 40] total 46 [2018-10-24 11:52:58,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-24 11:52:58,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-24 11:52:58,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:52:58,319 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand 46 states. [2018-10-24 11:52:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:58,890 INFO L93 Difference]: Finished difference Result 392 states and 400 transitions. [2018-10-24 11:52:58,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-24 11:52:58,890 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 241 [2018-10-24 11:52:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:58,892 INFO L225 Difference]: With dead ends: 392 [2018-10-24 11:52:58,892 INFO L226 Difference]: Without dead ends: 265 [2018-10-24 11:52:58,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1046, Invalid=1606, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 11:52:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-10-24 11:52:58,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 263. [2018-10-24 11:52:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-24 11:52:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-10-24 11:52:58,898 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 241 [2018-10-24 11:52:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:58,899 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-10-24 11:52:58,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-24 11:52:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-10-24 11:52:58,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-24 11:52:58,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:58,900 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:58,901 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:58,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:58,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1672293196, now seen corresponding path program 40 times [2018-10-24 11:52:58,901 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:58,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:58,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:58,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:58,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-24 11:52:59,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:59,828 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:59,857 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:53:00,057 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:53:00,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:00,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-24 11:53:00,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:00,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-24 11:53:00,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-24 11:53:00,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-24 11:53:00,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:53:00,189 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 46 states. [2018-10-24 11:53:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:01,588 INFO L93 Difference]: Finished difference Result 408 states and 410 transitions. [2018-10-24 11:53:01,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-24 11:53:01,588 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 262 [2018-10-24 11:53:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:01,590 INFO L225 Difference]: With dead ends: 408 [2018-10-24 11:53:01,590 INFO L226 Difference]: Without dead ends: 275 [2018-10-24 11:53:01,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:53:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-24 11:53:01,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 266. [2018-10-24 11:53:01,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-10-24 11:53:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2018-10-24 11:53:01,596 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 262 [2018-10-24 11:53:01,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:01,596 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2018-10-24 11:53:01,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-24 11:53:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2018-10-24 11:53:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-10-24 11:53:01,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:01,598 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:01,598 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:01,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:01,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1683367626, now seen corresponding path program 41 times [2018-10-24 11:53:01,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:01,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:01,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:01,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:01,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-24 11:53:02,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:02,553 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:02,562 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:53:21,098 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2018-10-24 11:53:21,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:21,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-24 11:53:21,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:21,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-10-24 11:53:21,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-24 11:53:21,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-24 11:53:21,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 11:53:21,250 INFO L87 Difference]: Start difference. First operand 266 states and 267 transitions. Second operand 47 states. [2018-10-24 11:53:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:21,882 INFO L93 Difference]: Finished difference Result 418 states and 420 transitions. [2018-10-24 11:53:21,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-24 11:53:21,882 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 265 [2018-10-24 11:53:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:21,884 INFO L225 Difference]: With dead ends: 418 [2018-10-24 11:53:21,884 INFO L226 Difference]: Without dead ends: 285 [2018-10-24 11:53:21,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 11:53:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-24 11:53:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 269. [2018-10-24 11:53:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-24 11:53:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2018-10-24 11:53:21,889 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 265 [2018-10-24 11:53:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:21,889 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2018-10-24 11:53:21,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-24 11:53:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2018-10-24 11:53:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-24 11:53:21,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:21,891 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:21,891 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:21,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:21,891 INFO L82 PathProgramCache]: Analyzing trace with hash -889229964, now seen corresponding path program 42 times [2018-10-24 11:53:21,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:21,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:21,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:21,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:21,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5593 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-24 11:53:23,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:23,752 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:23,762 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown