java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:52:59,357 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:52:59,359 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:52:59,377 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-03 08:52:59,437 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-03 08:52:59,461 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:52:59,462 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:52:59,463 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:52:59,463 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:52:59,463 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:52:59,464 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:52:59,464 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:52:59,464 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:52:59,464 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:52:59,465 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:52:59,465 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:52:59,466 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:52:59,466 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:52:59,466 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:52:59,466 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:52:59,466 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:52:59,467 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:52:59,467 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:52:59,467 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:52:59,467 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:52:59,468 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:52:59,469 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:52:59,469 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:52:59,469 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:52:59,469 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:52:59,469 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:52:59,470 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:52:59,470 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:52:59,470 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:52:59,470 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:52:59,542 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:52:59,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:52:59,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:52:59,565 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:52:59,565 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:52:59,566 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl [2018-10-03 08:52:59,566 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl' [2018-10-03 08:52:59,620 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:52:59,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:52:59,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:52:59,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:52:59,624 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:52:59,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:52:59" (1/1) ... [2018-10-03 08:52:59,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:52:59" (1/1) ... [2018-10-03 08:52:59,661 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 08:52:59,661 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 08:52:59,662 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 08:52:59,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:52:59,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:52:59,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:52:59,665 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:52:59,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:52:59" (1/1) ... [2018-10-03 08:52:59,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:52:59" (1/1) ... [2018-10-03 08:52:59,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:52:59" (1/1) ... [2018-10-03 08:52:59,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:52:59" (1/1) ... [2018-10-03 08:52:59,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:52:59" (1/1) ... [2018-10-03 08:52:59,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:52:59" (1/1) ... [2018-10-03 08:52:59,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:52:59" (1/1) ... [2018-10-03 08:52:59,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:52:59,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:52:59,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:52:59,685 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:52:59,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:52:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:52:59,754 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-03 08:52:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-03 08:52:59,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-03 08:52:59,929 INFO L337 CfgBuilder]: Using library mode [2018-10-03 08:52:59,930 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:52:59 BoogieIcfgContainer [2018-10-03 08:52:59,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:52:59,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:52:59,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:52:59,937 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:52:59,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:52:59" (1/2) ... [2018-10-03 08:52:59,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53124772 and model type Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:52:59, skipping insertion in model container [2018-10-03 08:52:59,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:52:59" (2/2) ... [2018-10-03 08:52:59,944 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-ArraysIntegefied.bpl [2018-10-03 08:52:59,956 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:52:59,964 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:53:00,008 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:53:00,009 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:53:00,009 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:53:00,009 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:53:00,009 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:53:00,009 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:53:00,010 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:53:00,010 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:53:00,010 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:53:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-03 08:53:00,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:53:00,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:00,032 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-03 08:53:00,033 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:00,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:00,040 INFO L82 PathProgramCache]: Analyzing trace with hash 890493448, now seen corresponding path program 1 times [2018-10-03 08:53:00,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:00,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:00,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:00,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:00,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:00,219 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:53:00,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:53:00,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:53:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:53:00,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:53:00,263 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2018-10-03 08:53:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:00,336 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2018-10-03 08:53:00,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:53:00,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-10-03 08:53:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:00,353 INFO L225 Difference]: With dead ends: 22 [2018-10-03 08:53:00,354 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 08:53:00,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:53:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 08:53:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 08:53:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:53:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-03 08:53:00,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2018-10-03 08:53:00,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:00,393 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-03 08:53:00,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:53:00,394 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-03 08:53:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:53:00,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:00,394 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-03 08:53:00,395 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:00,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:00,395 INFO L82 PathProgramCache]: Analyzing trace with hash 892342412, now seen corresponding path program 1 times [2018-10-03 08:53:00,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:00,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:00,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:00,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:00,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:00,430 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:53:00,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:53:00,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:53:00,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:53:00,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:53:00,432 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 3 states. [2018-10-03 08:53:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:00,447 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 08:53:00,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:53:00,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-10-03 08:53:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:00,449 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:53:00,449 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:53:00,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:53:00,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:53:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:53:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:53:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 08:53:00,454 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2018-10-03 08:53:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:00,454 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 08:53:00,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:53:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 08:53:00,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:53:00,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:00,455 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:00,455 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:00,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:00,456 INFO L82 PathProgramCache]: Analyzing trace with hash -391235530, now seen corresponding path program 1 times [2018-10-03 08:53:00,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:00,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:00,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:00,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:00,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:00,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:00,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:00,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:00,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:00,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:00,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:53:00,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:53:00,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:53:00,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:53:00,627 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-10-03 08:53:00,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:00,666 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 08:53:00,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:53:00,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-03 08:53:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:00,668 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:53:00,668 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:53:00,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:53:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:53:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:53:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:53:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 08:53:00,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-10-03 08:53:00,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:00,673 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 08:53:00,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:53:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 08:53:00,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:53:00,674 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:00,674 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:00,674 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:00,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:00,675 INFO L82 PathProgramCache]: Analyzing trace with hash -602113312, now seen corresponding path program 2 times [2018-10-03 08:53:00,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:00,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:00,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:00,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:00,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:00,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:00,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-03 08:53:00,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:00,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:00,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:00,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:00,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:00,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:53:00,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:53:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:53:00,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:53:00,847 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-10-03 08:53:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:00,865 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 08:53:00,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:53:00,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-03 08:53:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:00,866 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:53:00,866 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:53:00,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:53:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:53:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:53:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:53:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 08:53:00,871 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-10-03 08:53:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:00,871 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 08:53:00,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:53:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 08:53:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:53:00,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:00,872 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:00,873 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:00,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:00,873 INFO L82 PathProgramCache]: Analyzing trace with hash 334846090, now seen corresponding path program 3 times [2018-10-03 08:53:00,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:00,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:00,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:00,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:00,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:01,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:01,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:01,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:01,043 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 08:53:01,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:01,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:01,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:01,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:53:01,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:53:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:53:01,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:53:01,080 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-10-03 08:53:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:01,115 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 08:53:01,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:53:01,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-10-03 08:53:01,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:01,118 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:53:01,118 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:53:01,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:53:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:53:01,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:53:01,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:53:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 08:53:01,126 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-10-03 08:53:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:01,127 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 08:53:01,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:53:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 08:53:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:53:01,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:01,129 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:01,129 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:01,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash -747417292, now seen corresponding path program 4 times [2018-10-03 08:53:01,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:01,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:01,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:01,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:01,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:01,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:01,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:01,418 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:01,453 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:01,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:01,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:01,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:01,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:01,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:01,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:01,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:01,489 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2018-10-03 08:53:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:01,516 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 08:53:01,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:01,517 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-10-03 08:53:01,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:01,518 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:53:01,518 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:53:01,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:01,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:53:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:53:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:53:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 08:53:01,523 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-10-03 08:53:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:01,523 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 08:53:01,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 08:53:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:53:01,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:01,525 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:01,525 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:01,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:01,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1016128734, now seen corresponding path program 5 times [2018-10-03 08:53:01,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:01,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:01,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:01,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:01,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:01,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:01,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-03 08:53:01,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:01,711 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:53:01,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:01,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:01,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:01,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:01,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:01,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:01,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:01,761 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2018-10-03 08:53:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:01,869 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 08:53:01,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:01,869 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-03 08:53:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:01,870 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:53:01,870 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:53:01,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:01,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:53:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:53:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:53:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 08:53:01,876 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-10-03 08:53:01,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:01,876 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 08:53:01,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:01,877 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 08:53:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:53:01,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:01,878 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:01,878 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:01,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash -267873400, now seen corresponding path program 6 times [2018-10-03 08:53:01,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:01,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:01,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:01,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:01,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:01,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:01,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:02,003 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:02,018 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:53:02,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:02,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:02,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:02,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:02,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:02,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:02,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:02,057 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 9 states. [2018-10-03 08:53:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:02,087 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 08:53:02,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:02,087 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-10-03 08:53:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:02,088 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:53:02,088 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:53:02,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:53:02,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:53:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:53:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 08:53:02,093 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-10-03 08:53:02,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:02,093 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 08:53:02,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 08:53:02,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:53:02,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:02,095 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:02,095 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:02,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:02,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1386947278, now seen corresponding path program 7 times [2018-10-03 08:53:02,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:02,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:02,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:02,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:02,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:02,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:02,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:02,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:02,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:02,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:02,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:53:02,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:53:02,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:53:02,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:53:02,784 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 10 states. [2018-10-03 08:53:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:02,823 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 08:53:02,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:53:02,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-10-03 08:53:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:02,825 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:53:02,826 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:53:02,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:53:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:53:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:53:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:53:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 08:53:02,831 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-10-03 08:53:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:02,831 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 08:53:02,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:53:02,832 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 08:53:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:53:02,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:02,833 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:02,833 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:02,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:02,834 INFO L82 PathProgramCache]: Analyzing trace with hash -223329828, now seen corresponding path program 8 times [2018-10-03 08:53:02,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:02,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:02,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:02,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:02,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:02,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:02,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:02,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:03,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:03,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:03,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:03,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:03,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:53:03,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:53:03,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:53:03,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:53:03,050 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 11 states. [2018-10-03 08:53:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:03,093 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 08:53:03,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:53:03,095 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-10-03 08:53:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:03,096 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:53:03,096 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:53:03,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:53:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:53:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:53:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:53:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 08:53:03,102 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-10-03 08:53:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:03,102 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 08:53:03,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:53:03,102 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 08:53:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:53:03,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:03,104 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:03,104 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:03,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:03,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1659551354, now seen corresponding path program 9 times [2018-10-03 08:53:03,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:03,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:03,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:03,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:03,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:03,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:03,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:03,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:03,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-03 08:53:03,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:03,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:03,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:03,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:53:03,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:53:03,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:53:03,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:53:03,380 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 12 states. [2018-10-03 08:53:03,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:03,690 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 08:53:03,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:53:03,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-10-03 08:53:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:03,691 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:53:03,691 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:53:03,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:53:03,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:53:03,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:53:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:53:03,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 08:53:03,696 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-10-03 08:53:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:03,696 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 08:53:03,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:53:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 08:53:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:53:03,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:03,698 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:03,699 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:03,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:03,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2009179088, now seen corresponding path program 10 times [2018-10-03 08:53:03,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:03,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:03,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:03,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:03,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:03,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:03,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:03,930 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:03,967 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:03,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:03,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:04,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:04,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:53:04,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:53:04,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:53:04,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:53:04,013 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 13 states. [2018-10-03 08:53:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:04,081 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 08:53:04,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:53:04,085 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-10-03 08:53:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:04,086 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:53:04,086 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:53:04,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:53:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:53:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:53:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:53:04,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 08:53:04,090 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-10-03 08:53:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:04,091 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 08:53:04,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:53:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 08:53:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:53:04,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:04,092 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:04,092 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:04,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:04,093 INFO L82 PathProgramCache]: Analyzing trace with hash 782635482, now seen corresponding path program 11 times [2018-10-03 08:53:04,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:04,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:04,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:04,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:04,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:04,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:04,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:04,350 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:04,370 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-03 08:53:04,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:04,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:04,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:04,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:53:04,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:53:04,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:53:04,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:53:04,412 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 14 states. [2018-10-03 08:53:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:04,447 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 08:53:04,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:53:04,448 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-10-03 08:53:04,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:04,449 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:53:04,449 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:53:04,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:53:04,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:53:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:53:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:53:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 08:53:04,457 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-10-03 08:53:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:04,457 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 08:53:04,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:53:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 08:53:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:53:04,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:04,459 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:04,459 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:04,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1233576580, now seen corresponding path program 12 times [2018-10-03 08:53:04,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:04,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:04,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:04,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:04,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:04,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:04,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:04,670 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:04,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:53:04,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:04,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:04,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:04,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:53:04,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:53:04,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:53:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:53:04,883 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 15 states. [2018-10-03 08:53:04,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:04,981 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 08:53:04,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:53:04,982 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-10-03 08:53:04,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:04,983 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:53:04,983 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:53:04,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:53:04,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:53:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:53:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:53:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 08:53:04,988 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-10-03 08:53:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:04,988 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 08:53:04,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:53:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 08:53:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:53:04,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:04,990 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:04,990 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:04,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:04,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1893420590, now seen corresponding path program 13 times [2018-10-03 08:53:04,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:04,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:04,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:04,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:04,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:05,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:05,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:05,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:05,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:05,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:05,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:53:05,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:53:05,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:53:05,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:53:05,294 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2018-10-03 08:53:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:05,351 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 08:53:05,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:53:05,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-10-03 08:53:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:05,352 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:53:05,352 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:53:05,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:53:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:53:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:53:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:53:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 08:53:05,357 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-10-03 08:53:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:05,358 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 08:53:05,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:53:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 08:53:05,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:53:05,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:05,359 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:05,359 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:05,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:05,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1151478568, now seen corresponding path program 14 times [2018-10-03 08:53:05,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:05,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:05,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:05,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:05,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:05,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:05,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:05,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:05,574 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:05,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:05,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:05,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:05,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:53:05,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:53:05,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:53:05,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:53:05,618 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 17 states. [2018-10-03 08:53:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:05,673 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 08:53:05,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:53:05,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-10-03 08:53:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:05,674 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:53:05,674 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:53:05,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:53:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:53:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:53:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:53:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 08:53:05,679 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-10-03 08:53:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:05,679 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 08:53:05,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:53:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 08:53:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:53:05,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:05,681 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:05,681 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:05,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1586034306, now seen corresponding path program 15 times [2018-10-03 08:53:05,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:05,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:05,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:05,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:05,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:05,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:05,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:05,918 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:05,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-03 08:53:05,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:05,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:05,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:05,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:53:05,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:53:05,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:53:05,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:53:05,988 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 18 states. [2018-10-03 08:53:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:06,021 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-03 08:53:06,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:53:06,022 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-10-03 08:53:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:06,022 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:53:06,022 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:53:06,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:53:06,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:53:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:53:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:53:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-03 08:53:06,028 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-10-03 08:53:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:06,029 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-03 08:53:06,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:53:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-03 08:53:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:53:06,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:06,033 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:06,033 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:06,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:06,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1318531884, now seen corresponding path program 16 times [2018-10-03 08:53:06,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:06,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:06,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:06,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:06,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:06,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:06,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:06,410 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:06,448 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:06,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:06,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:06,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:06,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:53:06,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:53:06,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:53:06,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:53:06,496 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 19 states. [2018-10-03 08:53:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:06,718 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-03 08:53:06,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:53:06,719 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-10-03 08:53:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:06,720 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:53:06,720 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:53:06,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:53:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:53:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:53:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:53:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-03 08:53:06,725 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-10-03 08:53:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:06,725 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-03 08:53:06,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:53:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-03 08:53:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:53:06,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:06,727 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:06,727 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:06,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:06,732 INFO L82 PathProgramCache]: Analyzing trace with hash -561837354, now seen corresponding path program 17 times [2018-10-03 08:53:06,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:06,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:06,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:06,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:06,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:07,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:07,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:07,198 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:07,237 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-03 08:53:07,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:07,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:07,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:07,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:53:07,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:53:07,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:53:07,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:53:07,285 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 20 states. [2018-10-03 08:53:07,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:07,338 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-03 08:53:07,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:53:07,339 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-10-03 08:53:07,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:07,339 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:53:07,340 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:53:07,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:53:07,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:53:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:53:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:53:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-03 08:53:07,344 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-10-03 08:53:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:07,345 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-03 08:53:07,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:53:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-03 08:53:07,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:53:07,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:07,346 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:07,346 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:07,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:07,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1611070848, now seen corresponding path program 18 times [2018-10-03 08:53:07,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:07,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:07,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:07,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:07,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:07,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:07,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:07,615 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:07,635 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:53:07,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:07,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:07,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:07,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:53:07,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:53:07,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:53:07,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:53:07,681 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 21 states. [2018-10-03 08:53:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:07,734 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-03 08:53:07,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:53:07,734 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-10-03 08:53:07,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:07,736 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:53:07,736 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:53:07,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:53:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:53:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:53:07,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:53:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-03 08:53:07,740 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-10-03 08:53:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:07,741 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-03 08:53:07,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:53:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-03 08:53:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:53:07,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:07,742 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:07,742 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:07,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:07,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1013085398, now seen corresponding path program 19 times [2018-10-03 08:53:07,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:07,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:07,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:07,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:07,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:08,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:08,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:08,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:08,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:08,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:08,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:53:08,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:53:08,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:53:08,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:53:08,099 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 22 states. [2018-10-03 08:53:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:08,216 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-03 08:53:08,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:53:08,216 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-10-03 08:53:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:08,218 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:53:08,218 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:53:08,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:53:08,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:53:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-03 08:53:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:53:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-03 08:53:08,223 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-10-03 08:53:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:08,223 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-03 08:53:08,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:53:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-03 08:53:08,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:53:08,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:08,224 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:08,224 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:08,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:08,225 INFO L82 PathProgramCache]: Analyzing trace with hash 947991508, now seen corresponding path program 20 times [2018-10-03 08:53:08,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:08,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:08,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:08,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:08,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:08,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:08,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:08,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:08,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:08,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:08,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:08,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:08,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:53:08,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:53:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:53:08,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:53:08,970 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 23 states. [2018-10-03 08:53:09,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:09,145 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-03 08:53:09,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:53:09,148 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-10-03 08:53:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:09,148 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:53:09,148 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:53:09,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:53:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:53:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:53:09,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:53:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-03 08:53:09,152 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-10-03 08:53:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:09,152 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-03 08:53:09,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:53:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-03 08:53:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:53:09,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:09,154 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:09,154 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:09,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:09,154 INFO L82 PathProgramCache]: Analyzing trace with hash -861112450, now seen corresponding path program 21 times [2018-10-03 08:53:09,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:09,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:09,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:09,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:09,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:09,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:09,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:09,834 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:09,898 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-03 08:53:09,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:09,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:09,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:09,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:53:09,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:53:09,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:53:09,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:53:09,946 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 24 states. [2018-10-03 08:53:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:10,038 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-03 08:53:10,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:53:10,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-10-03 08:53:10,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:10,038 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:53:10,039 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:53:10,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:53:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:53:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 08:53:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:53:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-03 08:53:10,041 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-10-03 08:53:10,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:10,041 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-03 08:53:10,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:53:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-03 08:53:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:53:10,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:10,042 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:10,042 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:10,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash 215602728, now seen corresponding path program 22 times [2018-10-03 08:53:10,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:10,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:10,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:10,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:10,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:11,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:11,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:11,293 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:11,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:11,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:11,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:11,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:11,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:53:11,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:53:11,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:53:11,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:53:11,358 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 25 states. [2018-10-03 08:53:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:11,397 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-03 08:53:11,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:53:11,397 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-10-03 08:53:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:11,398 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:53:11,399 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:53:11,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:53:11,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:53:11,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-03 08:53:11,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:53:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-03 08:53:11,403 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-10-03 08:53:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:11,403 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-03 08:53:11,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:53:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-03 08:53:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:53:11,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:11,404 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:11,404 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:11,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:11,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1534865454, now seen corresponding path program 23 times [2018-10-03 08:53:11,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:11,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:11,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:11,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:11,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:11,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:11,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:11,800 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:11,827 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-03 08:53:11,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:11,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:11,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:11,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:53:11,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:53:11,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:53:11,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:53:11,879 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 26 states. [2018-10-03 08:53:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:11,927 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-03 08:53:11,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:53:11,927 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-10-03 08:53:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:11,928 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:53:11,928 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:53:11,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:53:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:53:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 08:53:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:53:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-03 08:53:11,931 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-10-03 08:53:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:11,932 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-03 08:53:11,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:53:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-03 08:53:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:53:11,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:11,933 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:11,933 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:11,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:11,934 INFO L82 PathProgramCache]: Analyzing trace with hash -35330948, now seen corresponding path program 24 times [2018-10-03 08:53:11,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:11,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:11,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:11,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:11,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:12,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:12,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:12,478 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:12,506 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:53:12,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:12,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:12,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:12,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:53:12,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:53:12,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:53:12,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:53:12,551 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 27 states. [2018-10-03 08:53:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:12,610 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-03 08:53:12,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:53:12,610 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-10-03 08:53:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:12,611 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:53:12,611 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:53:12,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:53:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:53:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-03 08:53:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:53:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-03 08:53:12,616 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-10-03 08:53:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:12,616 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-03 08:53:12,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:53:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-03 08:53:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:53:12,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:12,617 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:12,617 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:12,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:12,617 INFO L82 PathProgramCache]: Analyzing trace with hash -503868378, now seen corresponding path program 25 times [2018-10-03 08:53:12,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:12,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:12,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:12,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:12,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:13,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:13,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:13,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:13,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:13,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:13,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:53:13,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:53:13,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:53:13,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:53:13,311 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 28 states. [2018-10-03 08:53:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:13,393 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-03 08:53:13,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:53:13,394 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-10-03 08:53:13,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:13,395 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:53:13,395 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:53:13,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:53:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:53:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 08:53:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:53:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-03 08:53:13,399 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-10-03 08:53:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:13,399 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-03 08:53:13,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:53:13,400 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-03 08:53:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:53:13,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:13,400 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:13,400 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:13,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:13,401 INFO L82 PathProgramCache]: Analyzing trace with hash 410410704, now seen corresponding path program 26 times [2018-10-03 08:53:13,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:13,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:13,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:13,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:13,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:14,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:14,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:14,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:14,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:14,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:14,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:14,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:14,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:53:14,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:53:14,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:53:14,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:53:14,568 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 29 states. [2018-10-03 08:53:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:14,677 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-03 08:53:14,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:53:14,678 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-10-03 08:53:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:14,679 INFO L225 Difference]: With dead ends: 117 [2018-10-03 08:53:14,679 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 08:53:14,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:53:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 08:53:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-03 08:53:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:53:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-03 08:53:14,684 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-10-03 08:53:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:14,684 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-03 08:53:14,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:53:14,684 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-03 08:53:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 08:53:14,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:14,685 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:14,685 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:14,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:14,685 INFO L82 PathProgramCache]: Analyzing trace with hash 131843194, now seen corresponding path program 27 times [2018-10-03 08:53:14,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:14,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:14,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:14,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:14,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:15,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:15,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:15,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:15,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-03 08:53:15,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:15,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:15,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:15,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:53:15,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:53:15,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:53:15,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:53:15,717 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 30 states. [2018-10-03 08:53:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:15,771 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-03 08:53:15,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:53:15,772 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-10-03 08:53:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:15,773 INFO L225 Difference]: With dead ends: 121 [2018-10-03 08:53:15,773 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 08:53:15,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:53:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 08:53:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-03 08:53:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 08:53:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-03 08:53:15,777 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-10-03 08:53:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:15,778 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-03 08:53:15,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:53:15,778 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-03 08:53:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 08:53:15,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:15,779 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:15,779 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:15,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1432503588, now seen corresponding path program 28 times [2018-10-03 08:53:15,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:15,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:15,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:15,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:15,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:16,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:16,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:16,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:16,293 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:16,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:16,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:16,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:16,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:53:16,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:53:16,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:53:16,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:53:16,344 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 31 states. [2018-10-03 08:53:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:16,440 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-03 08:53:16,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:53:16,441 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-10-03 08:53:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:16,442 INFO L225 Difference]: With dead ends: 125 [2018-10-03 08:53:16,442 INFO L226 Difference]: Without dead ends: 123 [2018-10-03 08:53:16,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:53:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-03 08:53:16,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-03 08:53:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-03 08:53:16,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-03 08:53:16,446 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-10-03 08:53:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:16,447 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-03 08:53:16,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:53:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-03 08:53:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-03 08:53:16,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:16,448 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:16,448 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:16,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:16,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2063310642, now seen corresponding path program 29 times [2018-10-03 08:53:16,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:16,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:16,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:16,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:16,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:16,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:16,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:16,926 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:16,961 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-03 08:53:16,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:16,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:17,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:17,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:53:17,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:53:17,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:53:17,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:53:17,003 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 32 states. [2018-10-03 08:53:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:17,142 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-03 08:53:17,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:53:17,143 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-10-03 08:53:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:17,144 INFO L225 Difference]: With dead ends: 129 [2018-10-03 08:53:17,144 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 08:53:17,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:53:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 08:53:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-03 08:53:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-03 08:53:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-03 08:53:17,148 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-10-03 08:53:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:17,148 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-03 08:53:17,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:53:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-03 08:53:17,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-03 08:53:17,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:17,149 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:17,149 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:17,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1719888008, now seen corresponding path program 30 times [2018-10-03 08:53:17,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:17,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:17,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:17,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:17,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:17,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:17,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:17,658 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:17,698 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:53:17,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:17,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:17,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:17,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:53:17,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:53:17,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:53:17,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:53:17,740 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 33 states. [2018-10-03 08:53:17,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:17,802 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-03 08:53:17,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:53:17,802 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-10-03 08:53:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:17,803 INFO L225 Difference]: With dead ends: 133 [2018-10-03 08:53:17,803 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 08:53:17,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:53:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 08:53:17,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-03 08:53:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-03 08:53:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-03 08:53:17,806 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-10-03 08:53:17,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:17,806 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-03 08:53:17,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:53:17,807 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-03 08:53:17,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-03 08:53:17,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:17,807 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:17,808 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:17,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:17,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1270519518, now seen corresponding path program 31 times [2018-10-03 08:53:17,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:17,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:17,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:17,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:17,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:18,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:18,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:18,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:18,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:18,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:18,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:53:18,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:53:18,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:53:18,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:53:18,736 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 34 states. [2018-10-03 08:53:18,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:18,873 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-03 08:53:18,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:53:18,873 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-10-03 08:53:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:18,874 INFO L225 Difference]: With dead ends: 137 [2018-10-03 08:53:18,874 INFO L226 Difference]: Without dead ends: 135 [2018-10-03 08:53:18,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:53:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-03 08:53:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-03 08:53:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-03 08:53:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-03 08:53:18,878 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-10-03 08:53:18,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:18,879 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-03 08:53:18,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:53:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-03 08:53:18,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-03 08:53:18,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:18,880 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:18,880 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:18,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:18,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1248242228, now seen corresponding path program 32 times [2018-10-03 08:53:18,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:18,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:18,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:18,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:18,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:19,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:19,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:19,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:19,490 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:19,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:19,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:19,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:19,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:53:19,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:53:19,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:53:19,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:53:19,542 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 35 states. [2018-10-03 08:53:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:19,625 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-03 08:53:19,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:53:19,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-10-03 08:53:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:19,627 INFO L225 Difference]: With dead ends: 141 [2018-10-03 08:53:19,627 INFO L226 Difference]: Without dead ends: 139 [2018-10-03 08:53:19,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:53:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-03 08:53:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-03 08:53:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-03 08:53:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-03 08:53:19,631 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-10-03 08:53:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:19,632 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-03 08:53:19,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:53:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-03 08:53:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-03 08:53:19,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:19,633 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:19,633 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:19,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:19,633 INFO L82 PathProgramCache]: Analyzing trace with hash -596451978, now seen corresponding path program 33 times [2018-10-03 08:53:19,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:19,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:19,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:19,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:19,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:20,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:20,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:20,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:20,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-03 08:53:20,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:20,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:20,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:20,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:53:20,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:53:20,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:53:20,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:53:20,258 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 36 states. [2018-10-03 08:53:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:20,333 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-03 08:53:20,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:53:20,333 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-10-03 08:53:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:20,334 INFO L225 Difference]: With dead ends: 145 [2018-10-03 08:53:20,334 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 08:53:20,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:53:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 08:53:20,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-03 08:53:20,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 08:53:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-03 08:53:20,337 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-10-03 08:53:20,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:20,338 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-03 08:53:20,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:53:20,338 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-03 08:53:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 08:53:20,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:20,339 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:20,339 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:20,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:20,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1720483872, now seen corresponding path program 34 times [2018-10-03 08:53:20,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:20,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:20,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:20,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:20,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:21,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:21,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:21,024 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:21,052 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:21,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:21,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:21,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:21,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:53:21,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:53:21,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:53:21,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:53:21,113 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 37 states. [2018-10-03 08:53:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:21,189 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-03 08:53:21,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:53:21,190 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-10-03 08:53:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:21,192 INFO L225 Difference]: With dead ends: 149 [2018-10-03 08:53:21,192 INFO L226 Difference]: Without dead ends: 147 [2018-10-03 08:53:21,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:53:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-03 08:53:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-03 08:53:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-03 08:53:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-03 08:53:21,197 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-10-03 08:53:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:21,198 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-03 08:53:21,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:53:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-03 08:53:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 08:53:21,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:21,199 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:21,199 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:21,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:21,199 INFO L82 PathProgramCache]: Analyzing trace with hash 811646410, now seen corresponding path program 35 times [2018-10-03 08:53:21,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:21,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:21,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:21,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:21,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:22,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:22,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:22,178 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:22,257 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-03 08:53:22,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:22,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:22,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:22,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:53:22,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:53:22,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:53:22,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:53:22,325 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 38 states. [2018-10-03 08:53:22,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:22,477 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-03 08:53:22,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:53:22,478 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-10-03 08:53:22,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:22,480 INFO L225 Difference]: With dead ends: 153 [2018-10-03 08:53:22,480 INFO L226 Difference]: Without dead ends: 151 [2018-10-03 08:53:22,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:53:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-03 08:53:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-03 08:53:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-03 08:53:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-03 08:53:22,484 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-10-03 08:53:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:22,485 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-03 08:53:22,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:53:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-03 08:53:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-03 08:53:22,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:22,486 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:22,486 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:22,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1428821620, now seen corresponding path program 36 times [2018-10-03 08:53:22,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:22,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:22,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:22,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:22,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:23,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:23,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:23,770 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:23,814 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:53:23,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:23,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:23,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:23,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:53:23,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:53:23,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:53:23,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:53:23,881 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 39 states. [2018-10-03 08:53:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:23,996 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-03 08:53:23,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:53:23,996 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-10-03 08:53:23,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:23,997 INFO L225 Difference]: With dead ends: 157 [2018-10-03 08:53:23,997 INFO L226 Difference]: Without dead ends: 155 [2018-10-03 08:53:23,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:53:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-03 08:53:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-03 08:53:24,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-03 08:53:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-03 08:53:24,001 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-10-03 08:53:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:24,001 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-03 08:53:24,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:53:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-03 08:53:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-03 08:53:24,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:24,002 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:24,002 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:24,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:24,003 INFO L82 PathProgramCache]: Analyzing trace with hash -823981538, now seen corresponding path program 37 times [2018-10-03 08:53:24,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:24,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:24,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:24,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:24,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:25,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:25,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:25,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:25,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:25,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:25,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:53:25,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:53:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:53:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:53:25,347 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 40 states. [2018-10-03 08:53:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:25,510 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-03 08:53:25,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:53:25,511 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-10-03 08:53:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:25,512 INFO L225 Difference]: With dead ends: 161 [2018-10-03 08:53:25,512 INFO L226 Difference]: Without dead ends: 159 [2018-10-03 08:53:25,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:53:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-03 08:53:25,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-03 08:53:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-03 08:53:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-03 08:53:25,517 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 154 [2018-10-03 08:53:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:25,518 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-03 08:53:25,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:53:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-03 08:53:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 08:53:25,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:25,519 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:25,519 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:25,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:25,519 INFO L82 PathProgramCache]: Analyzing trace with hash 373692616, now seen corresponding path program 38 times [2018-10-03 08:53:25,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:25,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:25,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:25,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:25,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:26,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:26,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:26,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:26,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:26,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:26,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:26,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:26,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:53:26,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:53:26,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:53:26,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:53:26,771 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 41 states. [2018-10-03 08:53:27,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:27,743 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-03 08:53:27,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:53:27,744 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-10-03 08:53:27,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:27,745 INFO L225 Difference]: With dead ends: 165 [2018-10-03 08:53:27,745 INFO L226 Difference]: Without dead ends: 163 [2018-10-03 08:53:27,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:53:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-03 08:53:27,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-03 08:53:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-03 08:53:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-03 08:53:27,754 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 158 [2018-10-03 08:53:27,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:27,755 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-03 08:53:27,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:53:27,755 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-03 08:53:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-03 08:53:27,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:27,756 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:27,756 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:27,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:27,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1026702734, now seen corresponding path program 39 times [2018-10-03 08:53:27,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:27,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:27,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:27,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:27,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:28,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:28,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:28,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:28,796 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-03 08:53:28,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:28,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:28,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:28,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:53:28,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:53:28,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:53:28,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:53:28,860 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 42 states. [2018-10-03 08:53:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:28,948 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-03 08:53:28,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:53:28,948 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-10-03 08:53:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:28,950 INFO L225 Difference]: With dead ends: 169 [2018-10-03 08:53:28,951 INFO L226 Difference]: Without dead ends: 167 [2018-10-03 08:53:28,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:53:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-03 08:53:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-03 08:53:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-03 08:53:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-03 08:53:28,956 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 162 [2018-10-03 08:53:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:28,956 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-03 08:53:28,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:53:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-03 08:53:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-03 08:53:28,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:28,958 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:28,958 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:28,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:28,958 INFO L82 PathProgramCache]: Analyzing trace with hash 716474140, now seen corresponding path program 40 times [2018-10-03 08:53:28,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:28,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:28,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:28,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:28,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:29,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:29,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:29,875 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:29,907 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:29,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:29,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:29,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:29,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:53:29,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:53:29,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:53:29,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:53:29,961 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 43 states. [2018-10-03 08:53:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:30,066 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-03 08:53:30,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:53:30,066 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-10-03 08:53:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:30,068 INFO L225 Difference]: With dead ends: 173 [2018-10-03 08:53:30,068 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 08:53:30,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:53:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 08:53:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-03 08:53:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-03 08:53:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-03 08:53:30,072 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 166 [2018-10-03 08:53:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:30,073 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-03 08:53:30,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:53:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-03 08:53:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 08:53:30,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:30,074 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:30,074 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:30,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash 49604294, now seen corresponding path program 41 times [2018-10-03 08:53:30,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:30,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:30,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:30,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:30,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:30,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:30,845 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:30,904 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-03 08:53:30,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:30,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:30,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:30,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:53:30,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:53:30,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:53:30,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:53:30,978 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 44 states. [2018-10-03 08:53:31,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:31,691 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-03 08:53:31,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:53:31,691 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-10-03 08:53:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:31,692 INFO L225 Difference]: With dead ends: 177 [2018-10-03 08:53:31,693 INFO L226 Difference]: Without dead ends: 175 [2018-10-03 08:53:31,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:53:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-03 08:53:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-03 08:53:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 08:53:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-03 08:53:31,698 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 170 [2018-10-03 08:53:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:31,698 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-03 08:53:31,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:53:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-03 08:53:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-03 08:53:31,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:31,699 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:31,700 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:31,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:31,700 INFO L82 PathProgramCache]: Analyzing trace with hash -11968144, now seen corresponding path program 42 times [2018-10-03 08:53:31,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:31,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:31,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:31,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:33,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:33,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:33,445 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:33,498 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-03 08:53:33,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:33,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:33,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:33,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:53:33,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:53:33,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:53:33,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:53:33,572 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 45 states. [2018-10-03 08:53:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:33,660 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-03 08:53:33,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:53:33,660 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-10-03 08:53:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:33,662 INFO L225 Difference]: With dead ends: 181 [2018-10-03 08:53:33,662 INFO L226 Difference]: Without dead ends: 179 [2018-10-03 08:53:33,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:53:33,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-03 08:53:33,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-03 08:53:33,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-03 08:53:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-03 08:53:33,666 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 174 [2018-10-03 08:53:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:33,666 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-03 08:53:33,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:53:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-03 08:53:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-03 08:53:33,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:33,668 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:33,668 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:33,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:33,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1915516698, now seen corresponding path program 43 times [2018-10-03 08:53:33,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:33,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:33,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:33,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:34,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:34,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:34,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:34,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:34,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:34,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:53:34,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:53:34,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:53:34,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:53:34,945 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 46 states. [2018-10-03 08:53:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:35,333 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-03 08:53:35,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:53:35,334 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-10-03 08:53:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:35,335 INFO L225 Difference]: With dead ends: 185 [2018-10-03 08:53:35,335 INFO L226 Difference]: Without dead ends: 183 [2018-10-03 08:53:35,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:53:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-03 08:53:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-03 08:53:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-03 08:53:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-03 08:53:35,340 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 178 [2018-10-03 08:53:35,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:35,340 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-03 08:53:35,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:53:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-03 08:53:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-03 08:53:35,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:35,341 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:35,341 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:35,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:35,342 INFO L82 PathProgramCache]: Analyzing trace with hash -321345596, now seen corresponding path program 44 times [2018-10-03 08:53:35,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:35,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:35,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:35,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:35,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:36,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:36,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-03 08:53:36,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:36,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:36,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:36,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:36,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:36,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:53:36,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:53:36,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:53:36,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:53:36,353 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 47 states. [2018-10-03 08:53:36,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:36,600 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-03 08:53:36,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:53:36,600 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-10-03 08:53:36,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:36,602 INFO L225 Difference]: With dead ends: 189 [2018-10-03 08:53:36,602 INFO L226 Difference]: Without dead ends: 187 [2018-10-03 08:53:36,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:53:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-03 08:53:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-03 08:53:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-03 08:53:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-03 08:53:36,606 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 182 [2018-10-03 08:53:36,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:36,606 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-03 08:53:36,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:53:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-03 08:53:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-03 08:53:36,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:36,608 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:36,608 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:36,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:36,608 INFO L82 PathProgramCache]: Analyzing trace with hash -548899986, now seen corresponding path program 45 times [2018-10-03 08:53:36,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:36,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:36,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:36,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:36,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:38,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:38,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:38,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:38,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-03 08:53:38,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:38,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:38,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:38,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:53:38,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:53:38,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:53:38,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:53:38,252 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 48 states. [2018-10-03 08:53:38,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:38,422 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-03 08:53:38,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:53:38,423 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-10-03 08:53:38,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:38,425 INFO L225 Difference]: With dead ends: 193 [2018-10-03 08:53:38,425 INFO L226 Difference]: Without dead ends: 191 [2018-10-03 08:53:38,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:53:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-03 08:53:38,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-03 08:53:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-03 08:53:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-03 08:53:38,430 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 186 [2018-10-03 08:53:38,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:38,431 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-03 08:53:38,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:53:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-03 08:53:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-03 08:53:38,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:38,432 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:38,433 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:38,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:38,433 INFO L82 PathProgramCache]: Analyzing trace with hash 943086104, now seen corresponding path program 46 times [2018-10-03 08:53:38,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:38,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:38,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:38,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:40,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:40,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:40,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:40,205 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:40,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:40,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:40,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:40,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:53:40,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:53:40,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:53:40,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:53:40,293 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 49 states. [2018-10-03 08:53:40,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:40,418 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-03 08:53:40,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:53:40,419 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-10-03 08:53:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:40,420 INFO L225 Difference]: With dead ends: 197 [2018-10-03 08:53:40,420 INFO L226 Difference]: Without dead ends: 195 [2018-10-03 08:53:40,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:53:40,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-03 08:53:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-03 08:53:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-03 08:53:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-03 08:53:40,423 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 190 [2018-10-03 08:53:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:40,423 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-03 08:53:40,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:53:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-03 08:53:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-03 08:53:40,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:40,424 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:40,425 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:40,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash 85777346, now seen corresponding path program 47 times [2018-10-03 08:53:40,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:40,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:40,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:40,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:40,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:41,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:41,504 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:41,895 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-03 08:53:41,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:41,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:41,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:53:41,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:53:41,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:53:41,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:53:41,975 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 50 states. [2018-10-03 08:53:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:42,173 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-03 08:53:42,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:53:42,173 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-10-03 08:53:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:42,175 INFO L225 Difference]: With dead ends: 201 [2018-10-03 08:53:42,175 INFO L226 Difference]: Without dead ends: 199 [2018-10-03 08:53:42,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:53:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-03 08:53:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-03 08:53:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-03 08:53:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-03 08:53:42,179 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 194 [2018-10-03 08:53:42,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:42,179 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-03 08:53:42,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:53:42,179 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-03 08:53:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-03 08:53:42,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:42,180 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:42,180 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:42,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:42,180 INFO L82 PathProgramCache]: Analyzing trace with hash 305559660, now seen corresponding path program 48 times [2018-10-03 08:53:42,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:42,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:42,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:42,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:42,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:43,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:43,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:43,176 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:43,237 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-03 08:53:43,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:43,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:43,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:43,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:53:43,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:53:43,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:53:43,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:53:43,304 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 51 states. [2018-10-03 08:53:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:43,437 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-03 08:53:43,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:53:43,438 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-10-03 08:53:43,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:43,439 INFO L225 Difference]: With dead ends: 205 [2018-10-03 08:53:43,439 INFO L226 Difference]: Without dead ends: 203 [2018-10-03 08:53:43,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:53:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-03 08:53:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-03 08:53:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-03 08:53:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-03 08:53:43,443 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 198 [2018-10-03 08:53:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:43,443 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-03 08:53:43,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:53:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-03 08:53:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-03 08:53:43,444 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:43,445 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:43,445 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:43,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:43,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1971474410, now seen corresponding path program 49 times [2018-10-03 08:53:43,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:43,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:43,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:43,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:44,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:44,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:44,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:44,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:44,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:44,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:53:44,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:53:44,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:53:44,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:53:44,817 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 52 states. [2018-10-03 08:53:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:44,922 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-10-03 08:53:44,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:53:44,923 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-10-03 08:53:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:44,925 INFO L225 Difference]: With dead ends: 209 [2018-10-03 08:53:44,925 INFO L226 Difference]: Without dead ends: 207 [2018-10-03 08:53:44,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:53:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-03 08:53:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-03 08:53:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-03 08:53:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-10-03 08:53:44,929 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 202 [2018-10-03 08:53:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:44,929 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-10-03 08:53:44,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:53:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-10-03 08:53:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-03 08:53:44,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:44,930 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:44,931 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:44,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:44,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1750269248, now seen corresponding path program 50 times [2018-10-03 08:53:44,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:44,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:44,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:44,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:44,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:46,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:46,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:46,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:46,127 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:46,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:46,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:46,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:46,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:53:46,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:53:46,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:53:46,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:53:46,220 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 53 states. [2018-10-03 08:53:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:46,456 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-10-03 08:53:46,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:53:46,457 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-10-03 08:53:46,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:46,458 INFO L225 Difference]: With dead ends: 213 [2018-10-03 08:53:46,459 INFO L226 Difference]: Without dead ends: 211 [2018-10-03 08:53:46,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:53:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-03 08:53:46,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-03 08:53:46,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-03 08:53:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-10-03 08:53:46,463 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 206 [2018-10-03 08:53:46,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:46,464 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-10-03 08:53:46,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:53:46,464 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-10-03 08:53:46,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-03 08:53:46,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:46,465 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:46,465 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:46,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:46,466 INFO L82 PathProgramCache]: Analyzing trace with hash 37679210, now seen corresponding path program 51 times [2018-10-03 08:53:46,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:46,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:46,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:46,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:47,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:47,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:47,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:47,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-03 08:53:47,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:47,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:48,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:48,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:53:48,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:53:48,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:53:48,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:53:48,048 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 54 states. [2018-10-03 08:53:48,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:48,189 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-03 08:53:48,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:53:48,190 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-10-03 08:53:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:48,191 INFO L225 Difference]: With dead ends: 217 [2018-10-03 08:53:48,191 INFO L226 Difference]: Without dead ends: 215 [2018-10-03 08:53:48,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:53:48,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-03 08:53:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-10-03 08:53:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-03 08:53:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-10-03 08:53:48,195 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 210 [2018-10-03 08:53:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:48,196 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-10-03 08:53:48,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:53:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-10-03 08:53:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-03 08:53:48,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:48,197 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:48,197 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:48,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:48,197 INFO L82 PathProgramCache]: Analyzing trace with hash -781321964, now seen corresponding path program 52 times [2018-10-03 08:53:48,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:48,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:48,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:48,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:48,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:49,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:49,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:49,397 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:49,444 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:49,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:49,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:49,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:49,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 08:53:49,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:53:49,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:53:49,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:53:49,528 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 55 states. [2018-10-03 08:53:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:49,695 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-10-03 08:53:49,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:53:49,695 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-10-03 08:53:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:49,696 INFO L225 Difference]: With dead ends: 221 [2018-10-03 08:53:49,696 INFO L226 Difference]: Without dead ends: 219 [2018-10-03 08:53:49,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:53:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-03 08:53:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-03 08:53:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-03 08:53:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-10-03 08:53:49,700 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 214 [2018-10-03 08:53:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:49,700 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-10-03 08:53:49,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:53:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-10-03 08:53:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-03 08:53:49,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:49,702 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:49,702 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:49,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:49,702 INFO L82 PathProgramCache]: Analyzing trace with hash -348873538, now seen corresponding path program 53 times [2018-10-03 08:53:49,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:49,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:49,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:49,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:49,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:50,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:50,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:50,895 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:50,961 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-03 08:53:50,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:50,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:51,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:51,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:53:51,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:53:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:53:51,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:53:51,055 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 56 states. [2018-10-03 08:53:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:51,218 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-10-03 08:53:51,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:53:51,218 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-10-03 08:53:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:51,220 INFO L225 Difference]: With dead ends: 225 [2018-10-03 08:53:51,220 INFO L226 Difference]: Without dead ends: 223 [2018-10-03 08:53:51,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:53:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-03 08:53:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-03 08:53:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-03 08:53:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-10-03 08:53:51,223 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 218 [2018-10-03 08:53:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:51,224 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-10-03 08:53:51,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:53:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-10-03 08:53:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-03 08:53:51,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:51,225 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:51,225 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:51,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:51,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1269998744, now seen corresponding path program 54 times [2018-10-03 08:53:51,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:51,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:51,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:51,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:51,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:52,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:52,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:52,437 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:52,504 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-03 08:53:52,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:52,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:52,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:52,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 08:53:52,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:53:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:53:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:53:52,604 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 57 states. [2018-10-03 08:53:52,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:52,772 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-10-03 08:53:52,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:53:52,772 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-10-03 08:53:52,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:52,774 INFO L225 Difference]: With dead ends: 229 [2018-10-03 08:53:52,774 INFO L226 Difference]: Without dead ends: 227 [2018-10-03 08:53:52,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:53:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-03 08:53:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-03 08:53:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-03 08:53:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-10-03 08:53:52,778 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 222 [2018-10-03 08:53:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:52,778 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-10-03 08:53:52,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:53:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-10-03 08:53:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-03 08:53:52,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:52,780 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:52,780 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:52,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1338854126, now seen corresponding path program 55 times [2018-10-03 08:53:52,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:52,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:52,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:52,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:52,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:53,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:53,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:53,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:53,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:54,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:54,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:53:54,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:53:54,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:53:54,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:53:54,085 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 58 states. [2018-10-03 08:53:54,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:54,953 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-10-03 08:53:54,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:53:54,954 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-10-03 08:53:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:54,956 INFO L225 Difference]: With dead ends: 233 [2018-10-03 08:53:54,956 INFO L226 Difference]: Without dead ends: 231 [2018-10-03 08:53:54,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:53:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-03 08:53:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-03 08:53:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-03 08:53:54,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-10-03 08:53:54,960 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 226 [2018-10-03 08:53:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:54,961 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-10-03 08:53:54,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:53:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-10-03 08:53:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-03 08:53:54,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:54,962 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:54,962 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:54,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:54,963 INFO L82 PathProgramCache]: Analyzing trace with hash 555690428, now seen corresponding path program 56 times [2018-10-03 08:53:54,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:54,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:54,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:54,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:54,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:56,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:56,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:56,332 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:56,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:56,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:56,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:56,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:56,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 08:53:56,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:53:56,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:53:56,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:53:56,462 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 59 states. [2018-10-03 08:53:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:56,597 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-10-03 08:53:56,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:53:56,597 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-10-03 08:53:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:56,599 INFO L225 Difference]: With dead ends: 237 [2018-10-03 08:53:56,599 INFO L226 Difference]: Without dead ends: 235 [2018-10-03 08:53:56,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:53:56,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-10-03 08:53:56,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-10-03 08:53:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-03 08:53:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-10-03 08:53:56,603 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 230 [2018-10-03 08:53:56,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:56,603 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-10-03 08:53:56,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:53:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-10-03 08:53:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-03 08:53:56,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:56,604 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:56,604 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:56,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:56,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1475528346, now seen corresponding path program 57 times [2018-10-03 08:53:56,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:56,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:56,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:56,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:56,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:57,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:57,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:57,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:57,989 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-03 08:53:57,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:57,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:58,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:58,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:53:58,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:53:58,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:53:58,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:53:58,097 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 60 states. [2018-10-03 08:53:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:58,304 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-10-03 08:53:58,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:53:58,305 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-10-03 08:53:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:58,307 INFO L225 Difference]: With dead ends: 241 [2018-10-03 08:53:58,307 INFO L226 Difference]: Without dead ends: 239 [2018-10-03 08:53:58,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:53:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-03 08:53:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-10-03 08:53:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-03 08:53:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-10-03 08:53:58,310 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 234 [2018-10-03 08:53:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:58,311 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-10-03 08:53:58,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:53:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-10-03 08:53:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-03 08:53:58,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:58,312 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2018-10-03 08:53:58,312 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:58,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:58,312 INFO L82 PathProgramCache]: Analyzing trace with hash -457743344, now seen corresponding path program 58 times [2018-10-03 08:53:58,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:58,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:58,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:58,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:58,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:59,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:59,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:59,676 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:59,741 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:59,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:59,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:59,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:59,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 08:53:59,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:53:59,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:53:59,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:53:59,829 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 61 states. [2018-10-03 08:54:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:00,027 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-10-03 08:54:00,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:54:00,027 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-10-03 08:54:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:00,028 INFO L225 Difference]: With dead ends: 245 [2018-10-03 08:54:00,028 INFO L226 Difference]: Without dead ends: 243 [2018-10-03 08:54:00,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:54:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-03 08:54:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-10-03 08:54:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-10-03 08:54:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-10-03 08:54:00,031 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 238 [2018-10-03 08:54:00,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:00,031 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-10-03 08:54:00,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:54:00,031 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-10-03 08:54:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-03 08:54:00,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:00,034 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:00,034 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:00,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:00,035 INFO L82 PathProgramCache]: Analyzing trace with hash 362293690, now seen corresponding path program 59 times [2018-10-03 08:54:00,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:00,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:00,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:00,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:00,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:01,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:01,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:01,393 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:01,473 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-03 08:54:01,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:01,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:01,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:01,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:54:01,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:54:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:54:01,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:54:01,551 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 62 states. [2018-10-03 08:54:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:01,709 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-10-03 08:54:01,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:54:01,710 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-10-03 08:54:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:01,711 INFO L225 Difference]: With dead ends: 249 [2018-10-03 08:54:01,712 INFO L226 Difference]: Without dead ends: 247 [2018-10-03 08:54:01,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:54:01,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-10-03 08:54:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-10-03 08:54:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-03 08:54:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-10-03 08:54:01,716 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 242 [2018-10-03 08:54:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:01,716 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-10-03 08:54:01,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:54:01,717 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-10-03 08:54:01,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-03 08:54:01,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:01,718 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:01,718 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:01,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:01,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1209398684, now seen corresponding path program 60 times [2018-10-03 08:54:01,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:01,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:01,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:01,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:01,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:03,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:03,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:03,361 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:03,460 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-03 08:54:03,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:03,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:03,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:03,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 08:54:03,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:54:03,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:54:03,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:54:03,566 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 63 states. [2018-10-03 08:54:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:03,750 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-10-03 08:54:03,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:54:03,751 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-10-03 08:54:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:03,752 INFO L225 Difference]: With dead ends: 253 [2018-10-03 08:54:03,752 INFO L226 Difference]: Without dead ends: 251 [2018-10-03 08:54:03,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:54:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-03 08:54:03,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-10-03 08:54:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-03 08:54:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-10-03 08:54:03,756 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 246 [2018-10-03 08:54:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:03,756 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-10-03 08:54:03,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:54:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-10-03 08:54:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-03 08:54:03,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:03,757 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:03,757 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:03,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:03,758 INFO L82 PathProgramCache]: Analyzing trace with hash 665290254, now seen corresponding path program 61 times [2018-10-03 08:54:03,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:03,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:03,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:03,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:03,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:05,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:05,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:05,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:05,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:54:05,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:54:05,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:54:05,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:54:05,824 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 64 states. [2018-10-03 08:54:06,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:06,014 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-10-03 08:54:06,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:54:06,014 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-10-03 08:54:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:06,015 INFO L225 Difference]: With dead ends: 257 [2018-10-03 08:54:06,015 INFO L226 Difference]: Without dead ends: 255 [2018-10-03 08:54:06,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:54:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-03 08:54:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-10-03 08:54:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-03 08:54:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-10-03 08:54:06,018 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 250 [2018-10-03 08:54:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:06,018 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-10-03 08:54:06,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:54:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-10-03 08:54:06,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-03 08:54:06,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:06,019 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:06,020 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:06,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1066081464, now seen corresponding path program 62 times [2018-10-03 08:54:06,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:06,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:06,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:06,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:06,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:07,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:07,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:07,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:07,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:07,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:07,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:07,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:07,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 08:54:07,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:54:07,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:54:07,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:54:07,703 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 65 states. [2018-10-03 08:54:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:07,854 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-10-03 08:54:07,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:54:07,854 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-10-03 08:54:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:07,856 INFO L225 Difference]: With dead ends: 261 [2018-10-03 08:54:07,856 INFO L226 Difference]: Without dead ends: 259 [2018-10-03 08:54:07,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:54:07,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-03 08:54:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-10-03 08:54:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-03 08:54:07,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-10-03 08:54:07,861 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 254 [2018-10-03 08:54:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:07,861 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-10-03 08:54:07,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:54:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-10-03 08:54:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-03 08:54:07,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:07,863 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:07,863 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:07,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash -116437406, now seen corresponding path program 63 times [2018-10-03 08:54:07,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:07,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:07,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:07,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:09,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:09,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:09,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:09,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-03 08:54:09,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:09,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:09,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:09,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:54:09,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:54:09,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:54:09,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:54:09,663 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 66 states. [2018-10-03 08:54:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:09,846 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-10-03 08:54:09,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:54:09,846 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-10-03 08:54:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:09,848 INFO L225 Difference]: With dead ends: 265 [2018-10-03 08:54:09,848 INFO L226 Difference]: Without dead ends: 263 [2018-10-03 08:54:09,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:54:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-03 08:54:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-10-03 08:54:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-03 08:54:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-10-03 08:54:09,853 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 258 [2018-10-03 08:54:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:09,853 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-10-03 08:54:09,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:54:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-10-03 08:54:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-03 08:54:09,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:09,855 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:09,855 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:09,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:09,855 INFO L82 PathProgramCache]: Analyzing trace with hash 208575244, now seen corresponding path program 64 times [2018-10-03 08:54:09,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:09,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:09,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:09,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:09,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:11,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:11,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:11,796 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:11,856 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:11,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:11,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:11,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:11,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 08:54:11,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:54:11,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:54:11,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:54:11,969 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 67 states. [2018-10-03 08:54:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:12,177 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-10-03 08:54:12,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:54:12,177 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-10-03 08:54:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:12,179 INFO L225 Difference]: With dead ends: 269 [2018-10-03 08:54:12,179 INFO L226 Difference]: Without dead ends: 267 [2018-10-03 08:54:12,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:54:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-03 08:54:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-10-03 08:54:12,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-10-03 08:54:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-10-03 08:54:12,183 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 262 [2018-10-03 08:54:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:12,184 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-10-03 08:54:12,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:54:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-10-03 08:54:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-03 08:54:12,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:12,185 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:12,185 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:12,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:12,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1868332362, now seen corresponding path program 65 times [2018-10-03 08:54:12,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:12,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:12,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:12,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:12,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:13,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:13,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:13,896 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:13,993 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-03 08:54:13,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:13,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:14,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:14,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:54:14,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:54:14,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:54:14,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:54:14,090 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 68 states. [2018-10-03 08:54:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:14,280 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-10-03 08:54:14,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:54:14,281 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-10-03 08:54:14,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:14,282 INFO L225 Difference]: With dead ends: 273 [2018-10-03 08:54:14,282 INFO L226 Difference]: Without dead ends: 271 [2018-10-03 08:54:14,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:54:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-03 08:54:14,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-10-03 08:54:14,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-10-03 08:54:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-10-03 08:54:14,287 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 266 [2018-10-03 08:54:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:14,287 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-10-03 08:54:14,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:54:14,287 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-10-03 08:54:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-10-03 08:54:14,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:14,289 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:14,289 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:14,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:14,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1687648928, now seen corresponding path program 66 times [2018-10-03 08:54:14,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:14,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:14,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:14,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:14,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:16,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:16,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:16,264 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:16,357 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-03 08:54:16,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:16,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:16,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:16,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 08:54:16,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:54:16,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:54:16,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:54:16,455 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 69 states. [2018-10-03 08:54:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:16,633 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-10-03 08:54:16,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:54:16,634 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-10-03 08:54:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:16,635 INFO L225 Difference]: With dead ends: 277 [2018-10-03 08:54:16,635 INFO L226 Difference]: Without dead ends: 275 [2018-10-03 08:54:16,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:54:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-03 08:54:16,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-10-03 08:54:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-03 08:54:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-10-03 08:54:16,640 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 270 [2018-10-03 08:54:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:16,640 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-10-03 08:54:16,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:54:16,640 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-10-03 08:54:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-03 08:54:16,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:16,642 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:16,642 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:16,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:16,642 INFO L82 PathProgramCache]: Analyzing trace with hash -516414710, now seen corresponding path program 67 times [2018-10-03 08:54:16,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:16,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:16,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:16,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:16,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:18,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:18,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:18,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:18,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:18,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:18,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:54:18,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:54:18,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:54:18,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:54:18,567 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 70 states. [2018-10-03 08:54:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:18,808 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-10-03 08:54:18,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:54:18,809 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-10-03 08:54:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:18,811 INFO L225 Difference]: With dead ends: 281 [2018-10-03 08:54:18,811 INFO L226 Difference]: Without dead ends: 279 [2018-10-03 08:54:18,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:54:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-03 08:54:18,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-10-03 08:54:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-10-03 08:54:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-10-03 08:54:18,815 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 274 [2018-10-03 08:54:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:18,815 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-10-03 08:54:18,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:54:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-10-03 08:54:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-03 08:54:18,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:18,816 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:18,817 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:18,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:18,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1431100340, now seen corresponding path program 68 times [2018-10-03 08:54:18,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:18,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:18,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:18,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:18,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:20,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:20,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:20,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:21,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:21,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:21,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:21,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:21,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 08:54:21,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:54:21,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:54:21,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:54:21,131 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 71 states. [2018-10-03 08:54:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:21,378 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-10-03 08:54:21,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:54:21,379 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-10-03 08:54:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:21,381 INFO L225 Difference]: With dead ends: 285 [2018-10-03 08:54:21,381 INFO L226 Difference]: Without dead ends: 283 [2018-10-03 08:54:21,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:54:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-10-03 08:54:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-10-03 08:54:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-10-03 08:54:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-10-03 08:54:21,385 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 278 [2018-10-03 08:54:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:21,385 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-10-03 08:54:21,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:54:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-10-03 08:54:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-03 08:54:21,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:21,386 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:21,387 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:21,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:21,387 INFO L82 PathProgramCache]: Analyzing trace with hash -912183458, now seen corresponding path program 69 times [2018-10-03 08:54:21,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:21,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:21,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:21,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:21,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:23,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:23,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:23,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:23,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-03 08:54:23,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:23,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:23,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:23,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:54:23,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:54:23,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:54:23,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:54:23,501 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 72 states. [2018-10-03 08:54:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:23,864 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-10-03 08:54:23,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:54:23,865 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-10-03 08:54:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:23,866 INFO L225 Difference]: With dead ends: 289 [2018-10-03 08:54:23,867 INFO L226 Difference]: Without dead ends: 287 [2018-10-03 08:54:23,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:54:23,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-10-03 08:54:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-10-03 08:54:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-03 08:54:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-10-03 08:54:23,870 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 282 [2018-10-03 08:54:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:23,870 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-10-03 08:54:23,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:54:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-10-03 08:54:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-10-03 08:54:23,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:23,872 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:23,872 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:23,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1896899064, now seen corresponding path program 70 times [2018-10-03 08:54:23,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:23,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:23,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:23,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:23,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:26,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:26,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:26,118 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:26,175 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:26,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:26,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:26,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:26,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 08:54:26,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:54:26,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:54:26,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:54:26,267 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 73 states. [2018-10-03 08:54:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:26,476 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-10-03 08:54:26,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:54:26,476 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-10-03 08:54:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:26,478 INFO L225 Difference]: With dead ends: 293 [2018-10-03 08:54:26,478 INFO L226 Difference]: Without dead ends: 291 [2018-10-03 08:54:26,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:54:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-03 08:54:26,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-10-03 08:54:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-10-03 08:54:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-10-03 08:54:26,482 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 286 [2018-10-03 08:54:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:26,483 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-10-03 08:54:26,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:54:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-10-03 08:54:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-03 08:54:26,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:26,484 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:26,485 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:26,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash 347252658, now seen corresponding path program 71 times [2018-10-03 08:54:26,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:26,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:26,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:26,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:28,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:28,438 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:28,542 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-03 08:54:28,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:28,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:28,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:54:28,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:54:28,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:54:28,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:54:28,649 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 74 states. [2018-10-03 08:54:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:28,904 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-10-03 08:54:28,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:54:28,904 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-10-03 08:54:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:28,906 INFO L225 Difference]: With dead ends: 297 [2018-10-03 08:54:28,906 INFO L226 Difference]: Without dead ends: 295 [2018-10-03 08:54:28,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:54:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-10-03 08:54:28,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-10-03 08:54:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-10-03 08:54:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2018-10-03 08:54:28,910 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 290 [2018-10-03 08:54:28,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:28,910 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2018-10-03 08:54:28,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:54:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2018-10-03 08:54:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-03 08:54:28,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:28,912 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:28,912 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:28,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1994077092, now seen corresponding path program 72 times [2018-10-03 08:54:28,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:28,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:28,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:28,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:31,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:31,251 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:31,354 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-03 08:54:31,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:31,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:31,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 08:54:31,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:54:31,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:54:31,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:54:31,449 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 75 states. [2018-10-03 08:54:31,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:31,715 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-10-03 08:54:31,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:54:31,716 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-10-03 08:54:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:31,718 INFO L225 Difference]: With dead ends: 301 [2018-10-03 08:54:31,718 INFO L226 Difference]: Without dead ends: 299 [2018-10-03 08:54:31,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:54:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-03 08:54:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-10-03 08:54:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-03 08:54:31,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-10-03 08:54:31,722 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 294 [2018-10-03 08:54:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:31,722 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-10-03 08:54:31,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:54:31,722 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-10-03 08:54:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-03 08:54:31,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:31,723 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:31,723 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:31,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:31,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2034273286, now seen corresponding path program 73 times [2018-10-03 08:54:31,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:31,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:31,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:31,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:33,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:33,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:33,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:33,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:33,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:33,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:54:33,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:54:33,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:54:33,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:54:33,890 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 76 states. [2018-10-03 08:54:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:34,175 INFO L93 Difference]: Finished difference Result 305 states and 305 transitions. [2018-10-03 08:54:34,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:54:34,175 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-10-03 08:54:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:34,177 INFO L225 Difference]: With dead ends: 305 [2018-10-03 08:54:34,177 INFO L226 Difference]: Without dead ends: 303 [2018-10-03 08:54:34,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:54:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-03 08:54:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-10-03 08:54:34,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-10-03 08:54:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-10-03 08:54:34,181 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 298 [2018-10-03 08:54:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:34,181 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-10-03 08:54:34,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:54:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-10-03 08:54:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-03 08:54:34,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:34,182 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:34,182 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:34,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:34,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1891657392, now seen corresponding path program 74 times [2018-10-03 08:54:34,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:34,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:34,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:34,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:34,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:36,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:36,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:36,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:36,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:36,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:36,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:36,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:36,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 08:54:36,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:54:36,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:54:36,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:54:36,821 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 77 states. [2018-10-03 08:54:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:36,982 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-10-03 08:54:36,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:54:36,982 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-10-03 08:54:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:36,984 INFO L225 Difference]: With dead ends: 309 [2018-10-03 08:54:36,984 INFO L226 Difference]: Without dead ends: 307 [2018-10-03 08:54:36,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:54:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-10-03 08:54:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-10-03 08:54:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-10-03 08:54:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2018-10-03 08:54:36,988 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 302 [2018-10-03 08:54:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:36,989 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2018-10-03 08:54:36,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:54:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2018-10-03 08:54:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-03 08:54:36,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:36,990 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:36,990 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:36,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1709253542, now seen corresponding path program 75 times [2018-10-03 08:54:36,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:36,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:36,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:36,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:36,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:39,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:39,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:39,222 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-03 08:54:39,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:39,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:39,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:54:39,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:54:39,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:54:39,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:54:39,322 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 78 states. [2018-10-03 08:54:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:39,756 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-10-03 08:54:39,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:54:39,757 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-10-03 08:54:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:39,758 INFO L225 Difference]: With dead ends: 313 [2018-10-03 08:54:39,758 INFO L226 Difference]: Without dead ends: 311 [2018-10-03 08:54:39,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:54:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-10-03 08:54:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-10-03 08:54:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-03 08:54:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-10-03 08:54:39,763 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 306 [2018-10-03 08:54:39,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:39,763 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-10-03 08:54:39,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:54:39,763 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-10-03 08:54:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-03 08:54:39,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:39,765 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:39,765 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:39,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:39,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1586916612, now seen corresponding path program 76 times [2018-10-03 08:54:39,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:39,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:39,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:39,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:43,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:43,250 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:43,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:43,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:43,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:43,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-03 08:54:43,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:54:43,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:54:43,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:54:43,414 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 79 states. [2018-10-03 08:54:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:43,694 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2018-10-03 08:54:43,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:54:43,694 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-10-03 08:54:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:43,695 INFO L225 Difference]: With dead ends: 317 [2018-10-03 08:54:43,695 INFO L226 Difference]: Without dead ends: 315 [2018-10-03 08:54:43,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:54:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-03 08:54:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-10-03 08:54:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-03 08:54:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2018-10-03 08:54:43,698 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 310 [2018-10-03 08:54:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:43,699 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2018-10-03 08:54:43,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 08:54:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2018-10-03 08:54:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-03 08:54:43,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:43,700 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:43,700 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:43,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:43,700 INFO L82 PathProgramCache]: Analyzing trace with hash 102865070, now seen corresponding path program 77 times [2018-10-03 08:54:43,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:43,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:43,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:43,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:43,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:46,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:46,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:46,110 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:46,225 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-03 08:54:46,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:46,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:46,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:46,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:54:46,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:54:46,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:54:46,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:54:46,329 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 80 states. [2018-10-03 08:54:46,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:46,534 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2018-10-03 08:54:46,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:54:46,534 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-10-03 08:54:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:46,535 INFO L225 Difference]: With dead ends: 321 [2018-10-03 08:54:46,535 INFO L226 Difference]: Without dead ends: 319 [2018-10-03 08:54:46,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:54:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-10-03 08:54:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-10-03 08:54:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-10-03 08:54:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2018-10-03 08:54:46,538 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 314 [2018-10-03 08:54:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:46,538 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2018-10-03 08:54:46,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:54:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2018-10-03 08:54:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-10-03 08:54:46,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:46,540 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:46,540 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:46,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:46,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1467670360, now seen corresponding path program 78 times [2018-10-03 08:54:46,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:46,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:46,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:46,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:46,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:48,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:48,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:48,873 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:48,992 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-03 08:54:48,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:48,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:49,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:49,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-03 08:54:49,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 08:54:49,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 08:54:49,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:54:49,109 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand 81 states. [2018-10-03 08:54:49,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:49,282 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-10-03 08:54:49,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:54:49,283 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-10-03 08:54:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:49,284 INFO L225 Difference]: With dead ends: 325 [2018-10-03 08:54:49,284 INFO L226 Difference]: Without dead ends: 323 [2018-10-03 08:54:49,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:54:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-03 08:54:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-10-03 08:54:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-10-03 08:54:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-10-03 08:54:49,287 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 318 [2018-10-03 08:54:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:49,288 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-10-03 08:54:49,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 08:54:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-10-03 08:54:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-10-03 08:54:49,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:49,289 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:49,289 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:49,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:49,290 INFO L82 PathProgramCache]: Analyzing trace with hash 941408514, now seen corresponding path program 79 times [2018-10-03 08:54:49,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:49,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:49,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:49,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:49,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:51,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:51,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:51,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:52,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:52,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:52,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:54:52,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:54:52,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:54:52,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:54:52,141 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 82 states. [2018-10-03 08:54:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:52,321 INFO L93 Difference]: Finished difference Result 329 states and 329 transitions. [2018-10-03 08:54:52,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:54:52,322 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-10-03 08:54:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:52,323 INFO L225 Difference]: With dead ends: 329 [2018-10-03 08:54:52,323 INFO L226 Difference]: Without dead ends: 327 [2018-10-03 08:54:52,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:54:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-03 08:54:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-10-03 08:54:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-10-03 08:54:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2018-10-03 08:54:52,326 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 322 [2018-10-03 08:54:52,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:52,326 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2018-10-03 08:54:52,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:54:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2018-10-03 08:54:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-10-03 08:54:52,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:52,328 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:52,328 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:52,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:52,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1279376812, now seen corresponding path program 80 times [2018-10-03 08:54:52,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:52,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:52,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:52,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:52,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:54,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:54,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:54,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:54,773 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:54,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:54,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:54,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:54,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-03 08:54:54,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:54:54,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:54:54,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:54:54,882 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 83 states. [2018-10-03 08:54:55,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:55,212 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-10-03 08:54:55,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:54:55,213 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-10-03 08:54:55,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:55,214 INFO L225 Difference]: With dead ends: 333 [2018-10-03 08:54:55,214 INFO L226 Difference]: Without dead ends: 331 [2018-10-03 08:54:55,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:54:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-10-03 08:54:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-10-03 08:54:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-10-03 08:54:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2018-10-03 08:54:55,218 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 326 [2018-10-03 08:54:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:55,218 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2018-10-03 08:54:55,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:54:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2018-10-03 08:54:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-03 08:54:55,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:55,220 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:55,220 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:55,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:55,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1763420842, now seen corresponding path program 81 times [2018-10-03 08:54:55,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:55,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:55,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:55,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:55,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:58,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:58,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:54:58,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:58,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-03 08:54:58,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:58,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:58,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:58,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-03 08:54:58,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:54:58,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:54:58,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:54:58,333 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 84 states. [2018-10-03 08:54:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:58,587 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2018-10-03 08:54:58,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:54:58,588 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-10-03 08:54:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:58,589 INFO L225 Difference]: With dead ends: 337 [2018-10-03 08:54:58,589 INFO L226 Difference]: Without dead ends: 335 [2018-10-03 08:54:58,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:54:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-10-03 08:54:58,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-10-03 08:54:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-10-03 08:54:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2018-10-03 08:54:58,592 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 330 [2018-10-03 08:54:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:58,593 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2018-10-03 08:54:58,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:54:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2018-10-03 08:54:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-03 08:54:58,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:58,594 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2018-10-03 08:54:58,594 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:58,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:58,594 INFO L82 PathProgramCache]: Analyzing trace with hash 431949824, now seen corresponding path program 82 times [2018-10-03 08:54:58,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:58,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:58,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:58,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:58,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:01,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:01,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:01,092 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:01,159 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:01,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:01,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:01,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:01,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-03 08:55:01,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-03 08:55:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-03 08:55:01,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:55:01,302 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 85 states. [2018-10-03 08:55:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:01,648 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2018-10-03 08:55:01,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 08:55:01,649 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-10-03 08:55:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:01,651 INFO L225 Difference]: With dead ends: 341 [2018-10-03 08:55:01,651 INFO L226 Difference]: Without dead ends: 339 [2018-10-03 08:55:01,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:55:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-03 08:55:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-10-03 08:55:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-10-03 08:55:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2018-10-03 08:55:01,654 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 334 [2018-10-03 08:55:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:01,655 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2018-10-03 08:55:01,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-03 08:55:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2018-10-03 08:55:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-03 08:55:01,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:01,656 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:01,656 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:01,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1967936938, now seen corresponding path program 83 times [2018-10-03 08:55:01,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:01,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:01,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:01,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:01,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:04,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:04,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:04,284 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:04,429 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-03 08:55:04,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:04,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:04,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:04,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-03 08:55:04,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:55:04,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:55:04,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:55:04,542 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 86 states. [2018-10-03 08:55:04,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:04,835 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2018-10-03 08:55:04,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:55:04,835 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-10-03 08:55:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:04,838 INFO L225 Difference]: With dead ends: 345 [2018-10-03 08:55:04,838 INFO L226 Difference]: Without dead ends: 343 [2018-10-03 08:55:04,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:55:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-10-03 08:55:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-10-03 08:55:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-10-03 08:55:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2018-10-03 08:55:04,842 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 338 [2018-10-03 08:55:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:04,842 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2018-10-03 08:55:04,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:55:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2018-10-03 08:55:04,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-10-03 08:55:04,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:04,844 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:04,844 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:04,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:04,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2000241068, now seen corresponding path program 84 times [2018-10-03 08:55:04,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:04,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:04,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:04,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:04,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:07,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:07,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:07,821 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:07,948 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-03 08:55:07,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:07,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:08,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:08,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-03 08:55:08,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-03 08:55:08,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-03 08:55:08,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:55:08,066 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand 87 states. [2018-10-03 08:55:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:08,430 INFO L93 Difference]: Finished difference Result 349 states and 349 transitions. [2018-10-03 08:55:08,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 08:55:08,431 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-10-03 08:55:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:08,433 INFO L225 Difference]: With dead ends: 349 [2018-10-03 08:55:08,433 INFO L226 Difference]: Without dead ends: 347 [2018-10-03 08:55:08,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:55:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-10-03 08:55:08,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-10-03 08:55:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-10-03 08:55:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2018-10-03 08:55:08,451 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 342 [2018-10-03 08:55:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:08,452 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2018-10-03 08:55:08,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-03 08:55:08,452 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2018-10-03 08:55:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-10-03 08:55:08,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:08,456 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:08,456 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:08,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:08,457 INFO L82 PathProgramCache]: Analyzing trace with hash 304660990, now seen corresponding path program 85 times [2018-10-03 08:55:08,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:08,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:08,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:08,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:08,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:11,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:11,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:11,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:11,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:11,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:11,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-03 08:55:11,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:55:11,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:55:11,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:55:11,372 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 88 states. [2018-10-03 08:55:11,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:11,710 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-10-03 08:55:11,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:55:11,710 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-10-03 08:55:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:11,711 INFO L225 Difference]: With dead ends: 353 [2018-10-03 08:55:11,711 INFO L226 Difference]: Without dead ends: 351 [2018-10-03 08:55:11,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:55:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-10-03 08:55:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-10-03 08:55:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-10-03 08:55:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 351 transitions. [2018-10-03 08:55:11,714 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 351 transitions. Word has length 346 [2018-10-03 08:55:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:11,715 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 351 transitions. [2018-10-03 08:55:11,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:55:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 351 transitions. [2018-10-03 08:55:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-10-03 08:55:11,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:11,716 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:11,716 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:11,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:11,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1311563944, now seen corresponding path program 86 times [2018-10-03 08:55:11,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:11,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:11,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:11,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:11,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:14,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:14,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:14,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:14,655 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:14,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:14,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:14,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:14,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-03 08:55:14,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 08:55:14,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 08:55:14,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:55:14,777 INFO L87 Difference]: Start difference. First operand 351 states and 351 transitions. Second operand 89 states. [2018-10-03 08:55:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:15,176 INFO L93 Difference]: Finished difference Result 357 states and 357 transitions. [2018-10-03 08:55:15,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 08:55:15,177 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-10-03 08:55:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:15,179 INFO L225 Difference]: With dead ends: 357 [2018-10-03 08:55:15,179 INFO L226 Difference]: Without dead ends: 355 [2018-10-03 08:55:15,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:55:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-10-03 08:55:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-10-03 08:55:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-10-03 08:55:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2018-10-03 08:55:15,183 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 350 [2018-10-03 08:55:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:15,183 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2018-10-03 08:55:15,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 08:55:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2018-10-03 08:55:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-03 08:55:15,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:15,185 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:15,185 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:15,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1739744686, now seen corresponding path program 87 times [2018-10-03 08:55:15,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:15,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:15,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:15,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:15,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:18,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:18,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:18,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:18,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-03 08:55:18,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:18,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:18,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:18,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-03 08:55:18,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:55:18,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:55:18,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:55:18,533 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 90 states. [2018-10-03 08:55:18,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:18,747 INFO L93 Difference]: Finished difference Result 361 states and 361 transitions. [2018-10-03 08:55:18,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:55:18,747 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 354 [2018-10-03 08:55:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:18,748 INFO L225 Difference]: With dead ends: 361 [2018-10-03 08:55:18,748 INFO L226 Difference]: Without dead ends: 359 [2018-10-03 08:55:18,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:55:18,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-10-03 08:55:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-10-03 08:55:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-10-03 08:55:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 359 transitions. [2018-10-03 08:55:18,752 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 359 transitions. Word has length 354 [2018-10-03 08:55:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:18,753 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 359 transitions. [2018-10-03 08:55:18,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:55:18,753 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 359 transitions. [2018-10-03 08:55:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-10-03 08:55:18,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:18,755 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:18,755 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:18,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:18,756 INFO L82 PathProgramCache]: Analyzing trace with hash 180711164, now seen corresponding path program 88 times [2018-10-03 08:55:18,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:18,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:18,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:18,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:18,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:21,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:21,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:21,651 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:21,727 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:21,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:21,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:21,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:21,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-03 08:55:21,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-03 08:55:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-03 08:55:21,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:55:21,886 INFO L87 Difference]: Start difference. First operand 359 states and 359 transitions. Second operand 91 states. [2018-10-03 08:55:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:22,265 INFO L93 Difference]: Finished difference Result 365 states and 365 transitions. [2018-10-03 08:55:22,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 08:55:22,266 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 358 [2018-10-03 08:55:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:22,268 INFO L225 Difference]: With dead ends: 365 [2018-10-03 08:55:22,268 INFO L226 Difference]: Without dead ends: 363 [2018-10-03 08:55:22,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:55:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-03 08:55:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-10-03 08:55:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-10-03 08:55:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2018-10-03 08:55:22,272 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 358 [2018-10-03 08:55:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:22,272 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2018-10-03 08:55:22,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-03 08:55:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2018-10-03 08:55:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-03 08:55:22,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:22,274 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:22,274 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:22,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:22,274 INFO L82 PathProgramCache]: Analyzing trace with hash 512679590, now seen corresponding path program 89 times [2018-10-03 08:55:22,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:22,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:22,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:22,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:22,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:25,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:25,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:25,255 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:25,399 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-03 08:55:25,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:25,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:25,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:25,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-03 08:55:25,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:55:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:55:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:55:25,524 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 92 states. [2018-10-03 08:55:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:25,937 INFO L93 Difference]: Finished difference Result 369 states and 369 transitions. [2018-10-03 08:55:25,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 08:55:25,938 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 362 [2018-10-03 08:55:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:25,940 INFO L225 Difference]: With dead ends: 369 [2018-10-03 08:55:25,940 INFO L226 Difference]: Without dead ends: 367 [2018-10-03 08:55:25,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:55:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-10-03 08:55:25,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2018-10-03 08:55:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2018-10-03 08:55:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 367 transitions. [2018-10-03 08:55:25,944 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 367 transitions. Word has length 362 [2018-10-03 08:55:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:25,944 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 367 transitions. [2018-10-03 08:55:25,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:55:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 367 transitions. [2018-10-03 08:55:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-10-03 08:55:25,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:25,946 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:25,946 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:25,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1264871760, now seen corresponding path program 90 times [2018-10-03 08:55:25,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:25,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:25,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:25,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:25,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:29,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:29,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:29,256 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:29,440 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-03 08:55:29,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:29,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:29,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:29,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-03 08:55:29,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-03 08:55:29,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-03 08:55:29,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:55:29,579 INFO L87 Difference]: Start difference. First operand 367 states and 367 transitions. Second operand 93 states. [2018-10-03 08:55:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:29,971 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2018-10-03 08:55:29,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 08:55:29,971 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 366 [2018-10-03 08:55:29,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:29,973 INFO L225 Difference]: With dead ends: 373 [2018-10-03 08:55:29,973 INFO L226 Difference]: Without dead ends: 371 [2018-10-03 08:55:29,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:55:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2018-10-03 08:55:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2018-10-03 08:55:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-10-03 08:55:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2018-10-03 08:55:29,977 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 366 [2018-10-03 08:55:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:29,977 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2018-10-03 08:55:29,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-03 08:55:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2018-10-03 08:55:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-10-03 08:55:29,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:29,979 INFO L375 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:29,979 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:29,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1480552710, now seen corresponding path program 91 times [2018-10-03 08:55:29,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:29,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:29,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:29,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:29,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:33,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:33,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:33,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:33,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:33,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:33,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-03 08:55:33,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:55:33,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:55:33,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:55:33,511 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand 94 states. [2018-10-03 08:55:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:33,968 INFO L93 Difference]: Finished difference Result 377 states and 377 transitions. [2018-10-03 08:55:33,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 08:55:33,969 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 370 [2018-10-03 08:55:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:33,971 INFO L225 Difference]: With dead ends: 377 [2018-10-03 08:55:33,971 INFO L226 Difference]: Without dead ends: 375 [2018-10-03 08:55:33,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:55:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-10-03 08:55:33,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2018-10-03 08:55:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2018-10-03 08:55:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 375 transitions. [2018-10-03 08:55:33,975 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 375 transitions. Word has length 370 [2018-10-03 08:55:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:33,975 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 375 transitions. [2018-10-03 08:55:33,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:55:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 375 transitions. [2018-10-03 08:55:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-10-03 08:55:33,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:33,977 INFO L375 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:33,977 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:33,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1998729308, now seen corresponding path program 92 times [2018-10-03 08:55:33,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:33,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:33,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:33,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:33,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:38,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:38,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:38,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:38,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:38,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:38,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:38,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:38,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-03 08:55:38,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-03 08:55:38,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-03 08:55:38,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:55:38,232 INFO L87 Difference]: Start difference. First operand 375 states and 375 transitions. Second operand 95 states. [2018-10-03 08:55:38,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:38,660 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2018-10-03 08:55:38,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 08:55:38,661 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 374 [2018-10-03 08:55:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:38,663 INFO L225 Difference]: With dead ends: 381 [2018-10-03 08:55:38,663 INFO L226 Difference]: Without dead ends: 379 [2018-10-03 08:55:38,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:55:38,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2018-10-03 08:55:38,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2018-10-03 08:55:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-10-03 08:55:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 379 transitions. [2018-10-03 08:55:38,667 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 379 transitions. Word has length 374 [2018-10-03 08:55:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:38,667 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 379 transitions. [2018-10-03 08:55:38,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-03 08:55:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 379 transitions. [2018-10-03 08:55:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-10-03 08:55:38,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:38,669 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:38,669 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:38,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash 582396750, now seen corresponding path program 93 times [2018-10-03 08:55:38,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:38,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:38,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:38,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:38,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:41,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:41,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:41,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:42,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-03 08:55:42,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:42,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:42,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:42,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-03 08:55:42,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:55:42,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:55:42,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:55:42,159 INFO L87 Difference]: Start difference. First operand 379 states and 379 transitions. Second operand 96 states. [2018-10-03 08:55:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:42,424 INFO L93 Difference]: Finished difference Result 385 states and 385 transitions. [2018-10-03 08:55:42,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 08:55:42,424 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 378 [2018-10-03 08:55:42,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:42,425 INFO L225 Difference]: With dead ends: 385 [2018-10-03 08:55:42,425 INFO L226 Difference]: Without dead ends: 383 [2018-10-03 08:55:42,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:55:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-10-03 08:55:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-10-03 08:55:42,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-10-03 08:55:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 383 transitions. [2018-10-03 08:55:42,429 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 383 transitions. Word has length 378 [2018-10-03 08:55:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:42,429 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 383 transitions. [2018-10-03 08:55:42,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:55:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 383 transitions. [2018-10-03 08:55:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-10-03 08:55:42,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:42,431 INFO L375 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:42,431 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:42,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:42,431 INFO L82 PathProgramCache]: Analyzing trace with hash 671457784, now seen corresponding path program 94 times [2018-10-03 08:55:42,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:42,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:42,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:42,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:42,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:45,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:45,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:45,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:45,820 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:45,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:45,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:45,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:45,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-03 08:55:45,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-03 08:55:45,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-03 08:55:45,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:55:45,984 INFO L87 Difference]: Start difference. First operand 383 states and 383 transitions. Second operand 97 states. [2018-10-03 08:55:46,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:46,437 INFO L93 Difference]: Finished difference Result 389 states and 389 transitions. [2018-10-03 08:55:46,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 08:55:46,438 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 382 [2018-10-03 08:55:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:46,440 INFO L225 Difference]: With dead ends: 389 [2018-10-03 08:55:46,440 INFO L226 Difference]: Without dead ends: 387 [2018-10-03 08:55:46,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:55:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-10-03 08:55:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2018-10-03 08:55:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-10-03 08:55:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2018-10-03 08:55:46,445 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 382 [2018-10-03 08:55:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:46,445 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2018-10-03 08:55:46,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-03 08:55:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2018-10-03 08:55:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-10-03 08:55:46,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:46,447 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:46,447 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:46,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1782920098, now seen corresponding path program 95 times [2018-10-03 08:55:46,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:46,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:46,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:46,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:46,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:50,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:50,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:50,062 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:50,235 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-03 08:55:50,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:50,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:50,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:50,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-03 08:55:50,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:55:50,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:55:50,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:55:50,371 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand 98 states. [2018-10-03 08:55:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:50,885 INFO L93 Difference]: Finished difference Result 393 states and 393 transitions. [2018-10-03 08:55:50,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-03 08:55:50,886 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 386 [2018-10-03 08:55:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:50,888 INFO L225 Difference]: With dead ends: 393 [2018-10-03 08:55:50,888 INFO L226 Difference]: Without dead ends: 391 [2018-10-03 08:55:50,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:55:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-10-03 08:55:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2018-10-03 08:55:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-10-03 08:55:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 391 transitions. [2018-10-03 08:55:50,892 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 391 transitions. Word has length 386 [2018-10-03 08:55:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:50,893 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 391 transitions. [2018-10-03 08:55:50,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:55:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 391 transitions. [2018-10-03 08:55:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-10-03 08:55:50,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:50,894 INFO L375 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:50,894 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:50,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:50,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2041569356, now seen corresponding path program 96 times [2018-10-03 08:55:50,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:50,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:50,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:50,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:50,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:54,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:54,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:54,636 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:54,793 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-03 08:55:54,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:54,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:54,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:54,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-03 08:55:54,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-03 08:55:54,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-03 08:55:54,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:55:54,935 INFO L87 Difference]: Start difference. First operand 391 states and 391 transitions. Second operand 99 states. [2018-10-03 08:55:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:55,437 INFO L93 Difference]: Finished difference Result 397 states and 397 transitions. [2018-10-03 08:55:55,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 08:55:55,437 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 390 [2018-10-03 08:55:55,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:55,439 INFO L225 Difference]: With dead ends: 397 [2018-10-03 08:55:55,439 INFO L226 Difference]: Without dead ends: 395 [2018-10-03 08:55:55,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:55:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-10-03 08:55:55,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2018-10-03 08:55:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-10-03 08:55:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2018-10-03 08:55:55,443 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 390 [2018-10-03 08:55:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:55,443 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2018-10-03 08:55:55,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-03 08:55:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2018-10-03 08:55:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-03 08:55:55,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:55,445 INFO L375 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1] [2018-10-03 08:55:55,445 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:55,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:55,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1161832438, now seen corresponding path program 97 times [2018-10-03 08:55:55,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:55,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:55,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:55,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:55,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:59,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:59,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:55:59,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:59,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:59,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:59,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-03 08:55:59,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:55:59,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:55:59,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:55:59,510 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 100 states. [2018-10-03 08:56:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:00,071 INFO L93 Difference]: Finished difference Result 401 states and 401 transitions. [2018-10-03 08:56:00,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 08:56:00,072 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 394 [2018-10-03 08:56:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:00,074 INFO L225 Difference]: With dead ends: 401 [2018-10-03 08:56:00,074 INFO L226 Difference]: Without dead ends: 399 [2018-10-03 08:56:00,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:56:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-10-03 08:56:00,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2018-10-03 08:56:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-10-03 08:56:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 399 transitions. [2018-10-03 08:56:00,079 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 399 transitions. Word has length 394 [2018-10-03 08:56:00,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:00,079 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 399 transitions. [2018-10-03 08:56:00,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:56:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 399 transitions. [2018-10-03 08:56:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-10-03 08:56:00,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:00,080 INFO L375 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:00,081 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:00,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:00,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1162835296, now seen corresponding path program 98 times [2018-10-03 08:56:00,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:00,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:00,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:00,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:00,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:03,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:03,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:03,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:04,048 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:04,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:04,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:04,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:04,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-03 08:56:04,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-03 08:56:04,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-03 08:56:04,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:56:04,210 INFO L87 Difference]: Start difference. First operand 399 states and 399 transitions. Second operand 101 states. [2018-10-03 08:56:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:04,725 INFO L93 Difference]: Finished difference Result 405 states and 405 transitions. [2018-10-03 08:56:04,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-03 08:56:04,725 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 398 [2018-10-03 08:56:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:04,728 INFO L225 Difference]: With dead ends: 405 [2018-10-03 08:56:04,728 INFO L226 Difference]: Without dead ends: 403 [2018-10-03 08:56:04,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:56:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-10-03 08:56:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2018-10-03 08:56:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-10-03 08:56:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2018-10-03 08:56:04,732 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 398 [2018-10-03 08:56:04,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:04,732 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2018-10-03 08:56:04,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-03 08:56:04,732 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2018-10-03 08:56:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-10-03 08:56:04,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:04,734 INFO L375 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:04,735 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:04,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:04,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1719371850, now seen corresponding path program 99 times [2018-10-03 08:56:04,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:04,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:04,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:04,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:04,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:08,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:08,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:08,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:08,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-03 08:56:08,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:08,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:08,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:08,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-03 08:56:08,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:56:08,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:56:08,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:56:08,977 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 102 states. [2018-10-03 08:56:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:09,306 INFO L93 Difference]: Finished difference Result 409 states and 409 transitions. [2018-10-03 08:56:09,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-03 08:56:09,307 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 402 [2018-10-03 08:56:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:09,309 INFO L225 Difference]: With dead ends: 409 [2018-10-03 08:56:09,310 INFO L226 Difference]: Without dead ends: 407 [2018-10-03 08:56:09,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:56:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-10-03 08:56:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2018-10-03 08:56:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-03 08:56:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2018-10-03 08:56:09,315 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 402 [2018-10-03 08:56:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:09,315 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2018-10-03 08:56:09,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:56:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2018-10-03 08:56:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-10-03 08:56:09,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:09,317 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:09,318 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:09,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash 333160692, now seen corresponding path program 100 times [2018-10-03 08:56:09,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:09,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:09,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:09,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:09,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:13,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:13,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:13,398 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:13,480 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:13,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:13,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:13,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:13,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-03 08:56:13,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-03 08:56:13,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-03 08:56:13,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:56:13,648 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand 103 states. [2018-10-03 08:56:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:14,208 INFO L93 Difference]: Finished difference Result 413 states and 413 transitions. [2018-10-03 08:56:14,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-03 08:56:14,208 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 406 [2018-10-03 08:56:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:14,210 INFO L225 Difference]: With dead ends: 413 [2018-10-03 08:56:14,210 INFO L226 Difference]: Without dead ends: 411 [2018-10-03 08:56:14,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:56:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-10-03 08:56:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2018-10-03 08:56:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-10-03 08:56:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 411 transitions. [2018-10-03 08:56:14,215 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 411 transitions. Word has length 406 [2018-10-03 08:56:14,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:14,216 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 411 transitions. [2018-10-03 08:56:14,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-03 08:56:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 411 transitions. [2018-10-03 08:56:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-10-03 08:56:14,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:14,218 INFO L375 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:14,218 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:14,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:14,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1825264798, now seen corresponding path program 101 times [2018-10-03 08:56:14,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:14,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:14,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:14,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:14,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:18,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:18,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:18,193 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:18,374 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-03 08:56:18,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:18,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:18,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:18,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-03 08:56:18,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 08:56:18,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 08:56:18,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:56:18,569 INFO L87 Difference]: Start difference. First operand 411 states and 411 transitions. Second operand 104 states. [2018-10-03 08:56:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:19,141 INFO L93 Difference]: Finished difference Result 417 states and 417 transitions. [2018-10-03 08:56:19,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-03 08:56:19,142 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 410 [2018-10-03 08:56:19,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:19,143 INFO L225 Difference]: With dead ends: 417 [2018-10-03 08:56:19,143 INFO L226 Difference]: Without dead ends: 415 [2018-10-03 08:56:19,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:56:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-10-03 08:56:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-10-03 08:56:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-10-03 08:56:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 415 transitions. [2018-10-03 08:56:19,148 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 415 transitions. Word has length 410 [2018-10-03 08:56:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:19,149 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 415 transitions. [2018-10-03 08:56:19,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 08:56:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 415 transitions. [2018-10-03 08:56:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-10-03 08:56:19,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:19,151 INFO L375 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:19,151 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:19,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:19,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1710939320, now seen corresponding path program 102 times [2018-10-03 08:56:19,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:19,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:19,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:19,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:19,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:23,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:23,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:23,039 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:23,233 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-03 08:56:23,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:23,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:23,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:23,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-03 08:56:23,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-03 08:56:23,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-03 08:56:23,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:56:23,410 INFO L87 Difference]: Start difference. First operand 415 states and 415 transitions. Second operand 105 states. [2018-10-03 08:56:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:23,939 INFO L93 Difference]: Finished difference Result 421 states and 421 transitions. [2018-10-03 08:56:23,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-03 08:56:23,939 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 414 [2018-10-03 08:56:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:23,940 INFO L225 Difference]: With dead ends: 421 [2018-10-03 08:56:23,941 INFO L226 Difference]: Without dead ends: 419 [2018-10-03 08:56:23,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:56:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-10-03 08:56:23,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2018-10-03 08:56:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2018-10-03 08:56:23,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2018-10-03 08:56:23,945 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 414 [2018-10-03 08:56:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:23,945 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2018-10-03 08:56:23,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-03 08:56:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2018-10-03 08:56:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-10-03 08:56:23,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:23,946 INFO L375 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:23,947 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:23,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:23,947 INFO L82 PathProgramCache]: Analyzing trace with hash -486306574, now seen corresponding path program 103 times [2018-10-03 08:56:23,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:23,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:23,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:23,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:23,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:27,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:27,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:27,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:27,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:28,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:28,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-03 08:56:28,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-03 08:56:28,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-03 08:56:28,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:56:28,158 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand 106 states. [2018-10-03 08:56:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:28,764 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2018-10-03 08:56:28,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-03 08:56:28,765 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 418 [2018-10-03 08:56:28,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:28,766 INFO L225 Difference]: With dead ends: 425 [2018-10-03 08:56:28,766 INFO L226 Difference]: Without dead ends: 423 [2018-10-03 08:56:28,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:56:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-10-03 08:56:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2018-10-03 08:56:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2018-10-03 08:56:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 423 transitions. [2018-10-03 08:56:28,771 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 423 transitions. Word has length 418 [2018-10-03 08:56:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:28,772 INFO L480 AbstractCegarLoop]: Abstraction has 423 states and 423 transitions. [2018-10-03 08:56:28,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-03 08:56:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 423 transitions. [2018-10-03 08:56:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-10-03 08:56:28,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:28,774 INFO L375 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:28,774 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:28,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:28,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1308692892, now seen corresponding path program 104 times [2018-10-03 08:56:28,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:28,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:28,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:28,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:28,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:32,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:32,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:32,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:32,920 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:32,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:32,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:33,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:33,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-03 08:56:33,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-03 08:56:33,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-03 08:56:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:56:33,158 INFO L87 Difference]: Start difference. First operand 423 states and 423 transitions. Second operand 107 states. [2018-10-03 08:56:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:33,772 INFO L93 Difference]: Finished difference Result 429 states and 429 transitions. [2018-10-03 08:56:33,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-03 08:56:33,773 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 422 [2018-10-03 08:56:33,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:33,773 INFO L225 Difference]: With dead ends: 429 [2018-10-03 08:56:33,773 INFO L226 Difference]: Without dead ends: 427 [2018-10-03 08:56:33,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:56:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-10-03 08:56:33,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2018-10-03 08:56:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2018-10-03 08:56:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 427 transitions. [2018-10-03 08:56:33,777 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 427 transitions. Word has length 422 [2018-10-03 08:56:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:33,777 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 427 transitions. [2018-10-03 08:56:33,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-03 08:56:33,778 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 427 transitions. [2018-10-03 08:56:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-10-03 08:56:33,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:33,779 INFO L375 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:33,779 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:33,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:33,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1073230150, now seen corresponding path program 105 times [2018-10-03 08:56:33,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:33,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:33,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:33,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:33,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:37,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:37,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:37,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:38,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-10-03 08:56:38,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:38,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:38,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:38,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-03 08:56:38,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-03 08:56:38,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-03 08:56:38,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:56:38,257 INFO L87 Difference]: Start difference. First operand 427 states and 427 transitions. Second operand 108 states. [2018-10-03 08:56:38,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:38,679 INFO L93 Difference]: Finished difference Result 433 states and 433 transitions. [2018-10-03 08:56:38,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-03 08:56:38,679 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 426 [2018-10-03 08:56:38,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:38,680 INFO L225 Difference]: With dead ends: 433 [2018-10-03 08:56:38,680 INFO L226 Difference]: Without dead ends: 431 [2018-10-03 08:56:38,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:56:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-10-03 08:56:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2018-10-03 08:56:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2018-10-03 08:56:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 431 transitions. [2018-10-03 08:56:38,683 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 431 transitions. Word has length 426 [2018-10-03 08:56:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:38,684 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 431 transitions. [2018-10-03 08:56:38,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-03 08:56:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 431 transitions. [2018-10-03 08:56:38,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-10-03 08:56:38,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:38,685 INFO L375 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:38,685 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:38,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:38,686 INFO L82 PathProgramCache]: Analyzing trace with hash 480472048, now seen corresponding path program 106 times [2018-10-03 08:56:38,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:38,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:38,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:38,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:38,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:42,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:42,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:42,887 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:42,975 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:42,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:42,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:43,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:43,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-03 08:56:43,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-03 08:56:43,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-03 08:56:43,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:56:43,163 INFO L87 Difference]: Start difference. First operand 431 states and 431 transitions. Second operand 109 states. [2018-10-03 08:56:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:43,843 INFO L93 Difference]: Finished difference Result 437 states and 437 transitions. [2018-10-03 08:56:43,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-03 08:56:43,843 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 430 [2018-10-03 08:56:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:43,844 INFO L225 Difference]: With dead ends: 437 [2018-10-03 08:56:43,844 INFO L226 Difference]: Without dead ends: 435 [2018-10-03 08:56:43,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:56:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-10-03 08:56:43,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2018-10-03 08:56:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2018-10-03 08:56:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 435 transitions. [2018-10-03 08:56:43,848 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 435 transitions. Word has length 430 [2018-10-03 08:56:43,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:43,848 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 435 transitions. [2018-10-03 08:56:43,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-03 08:56:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 435 transitions. [2018-10-03 08:56:43,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-10-03 08:56:43,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:43,850 INFO L375 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:43,850 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:43,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:43,850 INFO L82 PathProgramCache]: Analyzing trace with hash -427998822, now seen corresponding path program 107 times [2018-10-03 08:56:43,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:43,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:43,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:43,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:43,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:48,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:48,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:48,205 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:48,405 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-10-03 08:56:48,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:48,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:48,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:48,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-03 08:56:48,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-03 08:56:48,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-03 08:56:48,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:56:48,597 INFO L87 Difference]: Start difference. First operand 435 states and 435 transitions. Second operand 110 states. [2018-10-03 08:56:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:49,175 INFO L93 Difference]: Finished difference Result 441 states and 441 transitions. [2018-10-03 08:56:49,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-03 08:56:49,175 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 434 [2018-10-03 08:56:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:49,176 INFO L225 Difference]: With dead ends: 441 [2018-10-03 08:56:49,177 INFO L226 Difference]: Without dead ends: 439 [2018-10-03 08:56:49,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:56:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2018-10-03 08:56:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2018-10-03 08:56:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2018-10-03 08:56:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 439 transitions. [2018-10-03 08:56:49,181 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 439 transitions. Word has length 434 [2018-10-03 08:56:49,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:49,181 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 439 transitions. [2018-10-03 08:56:49,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-03 08:56:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 439 transitions. [2018-10-03 08:56:49,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-10-03 08:56:49,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:49,183 INFO L375 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:49,183 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:49,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:49,183 INFO L82 PathProgramCache]: Analyzing trace with hash -557829564, now seen corresponding path program 108 times [2018-10-03 08:56:49,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:49,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:49,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:49,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:49,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 23220 backedges. 0 proven. 23220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:53,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:53,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:56:53,485 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:53,672 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-10-03 08:56:53,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:53,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 23220 backedges. 0 proven. 23220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:53,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:53,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-03 08:56:53,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-03 08:56:53,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-03 08:56:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-03 08:56:53,869 INFO L87 Difference]: Start difference. First operand 439 states and 439 transitions. Second operand 111 states. [2018-10-03 08:56:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:54,300 INFO L93 Difference]: Finished difference Result 445 states and 445 transitions. [2018-10-03 08:56:54,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-03 08:56:54,300 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 438 [2018-10-03 08:56:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:54,301 INFO L225 Difference]: With dead ends: 445 [2018-10-03 08:56:54,301 INFO L226 Difference]: Without dead ends: 443 [2018-10-03 08:56:54,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-03 08:56:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2018-10-03 08:56:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2018-10-03 08:56:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2018-10-03 08:56:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 443 transitions. [2018-10-03 08:56:54,304 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 443 transitions. Word has length 438 [2018-10-03 08:56:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:54,304 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 443 transitions. [2018-10-03 08:56:54,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-03 08:56:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 443 transitions. [2018-10-03 08:56:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2018-10-03 08:56:54,306 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:54,306 INFO L375 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 1, 1, 1, 1, 1, 1] [2018-10-03 08:56:54,306 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:54,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:54,306 INFO L82 PathProgramCache]: Analyzing trace with hash 627490286, now seen corresponding path program 109 times [2018-10-03 08:56:54,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:54,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:54,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:54,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:56:56,935 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:56:56,939 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:56:56,939 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:56:56 BoogieIcfgContainer [2018-10-03 08:56:56,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:56:56,940 INFO L168 Benchmark]: Toolchain (without parser) took 237319.67 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 248.5 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 349.5 MB). Peak memory consumption was 598.0 MB. Max. memory is 7.1 GB. [2018-10-03 08:56:56,942 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:56:56,942 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:56:56,942 INFO L168 Benchmark]: Boogie Preprocessor took 20.11 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:56:56,942 INFO L168 Benchmark]: RCFGBuilder took 245.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 08:56:56,943 INFO L168 Benchmark]: TraceAbstraction took 237008.25 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 248.5 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 328.3 MB). Peak memory consumption was 576.8 MB. Max. memory is 7.1 GB. [2018-10-03 08:56:56,945 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.11 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 245.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237008.25 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 248.5 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 328.3 MB). Peak memory consumption was 576.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 41). Cancelled while BasicCegarLoop was analyzing trace of length 443 with TraceHistMax 109, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 87 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 236.9s OverallTime, 111 OverallIterations, 109 TraceHistogramMax, 26.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 990 SDtfs, 594 SDslu, 21572 SDs, 0 SdLazy, 9695 SolverSat, 197 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30190 GetRequests, 24194 SyntacticMatches, 0 SemanticMatches, 5996 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 177.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=443occurred in iteration=110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 110 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 8.5s SatisfiabilityAnalysisTime, 188.3s InterpolantComputationTime, 48396 NumberOfCodeBlocks, 48396 NumberOfCodeBlocksAsserted, 3260 NumberOfCheckSat, 48178 ConstructedInterpolants, 0 QuantifiedInterpolants, 42204998 SizeOfPredicates, 108 NumberOfNonLiveVariables, 36612 ConjunctsInSsa, 6102 ConjunctsInUnsatCore, 218 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1691244 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-56-56-953.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-56-56-953.csv Completed graceful shutdown