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/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:36:59,435 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:36:59,437 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:36:59,450 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:36:59,450 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:36:59,451 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:36:59,453 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:36:59,455 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:36:59,456 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:36:59,457 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:36:59,458 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:36:59,458 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:36:59,459 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:36:59,461 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:36:59,462 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:36:59,463 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:36:59,463 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:36:59,465 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:36:59,467 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:36:59,469 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:36:59,470 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:36:59,472 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:36:59,474 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:36:59,484 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 [2018-09-23 21:36:59,510 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:36:59,510 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:36:59,512 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:36:59,512 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:36:59,513 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:36:59,513 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:36:59,514 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:36:59,514 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:36:59,515 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:36:59,515 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:36:59,515 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:36:59,515 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:36:59,516 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:36:59,516 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:36:59,516 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:36:59,517 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:36:59,517 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:36:59,517 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:36:59,517 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:36:59,518 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:36:59,518 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:36:59,518 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:36:59,518 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:36:59,519 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:36:59,520 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:36:59,520 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:36:59,520 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:36:59,520 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:36:59,521 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:36:59,521 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:36:59,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:36:59,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:36:59,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:36:59,591 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:36:59,592 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:36:59,593 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-09-23 21:36:59,593 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-09-23 21:36:59,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:36:59,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:36:59,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:36:59,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:36:59,650 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:36:59,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:59" (1/1) ... [2018-09-23 21:36:59,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:59" (1/1) ... [2018-09-23 21:36:59,693 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 21:36:59,693 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 21:36:59,694 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 21:36:59,696 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:36:59,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:36:59,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:36:59,697 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:36:59,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:59" (1/1) ... [2018-09-23 21:36:59,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:59" (1/1) ... [2018-09-23 21:36:59,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:59" (1/1) ... [2018-09-23 21:36:59,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:59" (1/1) ... [2018-09-23 21:36:59,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:59" (1/1) ... [2018-09-23 21:36:59,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:59" (1/1) ... [2018-09-23 21:36:59,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:59" (1/1) ... [2018-09-23 21:36:59,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:36:59,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:36:59,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:36:59,725 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:36:59,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:59" (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 [2018-09-23 21:36:59,808 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 21:36:59,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 21:36:59,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 21:36:59,970 INFO L351 CfgBuilder]: Using library mode [2018-09-23 21:36:59,970 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:36:59 BoogieIcfgContainer [2018-09-23 21:36:59,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:36:59,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:36:59,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:36:59,975 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:36:59,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:59" (1/2) ... [2018-09-23 21:36:59,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a864e0c and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:36:59, skipping insertion in model container [2018-09-23 21:36:59,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:36:59" (2/2) ... [2018-09-23 21:36:59,979 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-09-23 21:36:59,988 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:36:59,996 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:37:00,049 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:37:00,050 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:37:00,051 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:37:00,051 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:37:00,051 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:37:00,051 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:37:00,051 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:37:00,052 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:37:00,052 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:37:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 21:37:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 21:37:00,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:00,073 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 21:37:00,075 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:00,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:00,081 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-23 21:37:00,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:00,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:00,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:00,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:00,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:00,227 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:37:00,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 21:37:00,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:37:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:37:00,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:37:00,246 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 21:37:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:00,324 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 21:37:00,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:37:00,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 21:37:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:00,338 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:37:00,338 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 21:37:00,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:37:00,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 21:37:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 21:37:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 21:37:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 21:37:00,409 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-23 21:37:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:00,409 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 21:37:00,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:37:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 21:37:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:37:00,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:00,410 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-23 21:37:00,414 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:00,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:00,414 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-23 21:37:00,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:00,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:00,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:00,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:00,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:00,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:00,525 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 [2018-09-23 21:37:00,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:00,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:00,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:00,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-23 21:37:00,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:37:00,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:37:00,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:37:00,836 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-23 21:37:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:00,957 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 21:37:00,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:37:00,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-23 21:37:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:00,960 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:37:00,960 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:37:00,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:37:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:37:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:37:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:37:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 21:37:00,969 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-23 21:37:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:00,969 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 21:37:00,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:37:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 21:37:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:37:00,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:00,970 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-23 21:37:00,972 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:00,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-23 21:37:00,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:00,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:00,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:00,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:00,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:01,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:01,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:01,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:01,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:01,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:01,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:01,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:01,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-23 21:37:01,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:37:01,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:37:01,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:37:01,269 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-23 21:37:01,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:01,406 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 21:37:01,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:37:01,408 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-23 21:37:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:01,409 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:37:01,409 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 21:37:01,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:37:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 21:37:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 21:37:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:37:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 21:37:01,424 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-23 21:37:01,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:01,424 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 21:37:01,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:37:01,425 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 21:37:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 21:37:01,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:01,429 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-23 21:37:01,431 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:01,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:01,432 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-23 21:37:01,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:01,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:01,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:01,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:01,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:01,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:01,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:37:01,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:01,673 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 21:37:01,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:01,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:01,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:01,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-23 21:37:01,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:37:01,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:37:01,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:37:01,845 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-23 21:37:01,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:01,909 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 21:37:01,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:37:01,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-23 21:37:01,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:01,911 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:37:01,911 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 21:37:01,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:37:01,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 21:37:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 21:37:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 21:37:01,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 21:37:01,916 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-23 21:37:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:01,916 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 21:37:01,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:37:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 21:37:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:37:01,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:01,917 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-23 21:37:01,917 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:01,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:01,918 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-23 21:37:01,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:01,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:01,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:01,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:01,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:02,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:02,084 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 [2018-09-23 21:37:02,096 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:02,102 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:02,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:02,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:02,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:02,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-23 21:37:02,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:37:02,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:37:02,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:37:02,250 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-23 21:37:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:02,333 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 21:37:02,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:37:02,333 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-23 21:37:02,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:02,334 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:37:02,334 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 21:37:02,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:37:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 21:37:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 21:37:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:37:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 21:37:02,339 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-23 21:37:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:02,339 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 21:37:02,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:37:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 21:37:02,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:37:02,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:02,340 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-23 21:37:02,340 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:02,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:02,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-23 21:37:02,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:02,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:02,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:02,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:02,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:02,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:02,696 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:02,715 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:02,780 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 21:37:02,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:02,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:02,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:02,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-23 21:37:02,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:37:02,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:37:02,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:37:02,926 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-23 21:37:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:03,026 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 21:37:03,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:37:03,028 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 21:37:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:03,028 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:37:03,029 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 21:37:03,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:37:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 21:37:03,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 21:37:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:37:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 21:37:03,033 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-23 21:37:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:03,034 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 21:37:03,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:37:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 21:37:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 21:37:03,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:03,035 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-23 21:37:03,035 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:03,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:03,036 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-23 21:37:03,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:03,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:03,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:03,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:03,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:03,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:03,210 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 [2018-09-23 21:37:03,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:03,226 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:37:03,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:03,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:03,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:03,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-23 21:37:03,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:37:03,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:37:03,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:37:03,404 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-23 21:37:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:03,458 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 21:37:03,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:37:03,459 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-23 21:37:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:03,459 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:37:03,460 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 21:37:03,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:37:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 21:37:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 21:37:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 21:37:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 21:37:03,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-23 21:37:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:03,466 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 21:37:03,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:37:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 21:37:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:37:03,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:03,467 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-23 21:37:03,467 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:03,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:03,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-23 21:37:03,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:03,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:03,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:03,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:03,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:03,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:03,646 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 [2018-09-23 21:37:03,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:03,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:03,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:03,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-23 21:37:03,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:37:03,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:37:03,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:37:03,867 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-23 21:37:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:03,925 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 21:37:03,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:37:03,926 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-23 21:37:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:03,927 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:37:03,927 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 21:37:03,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:37:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 21:37:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 21:37:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:37:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 21:37:03,933 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-23 21:37:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:03,934 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 21:37:03,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:37:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 21:37:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 21:37:03,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:03,935 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-23 21:37:03,935 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:03,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:03,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-23 21:37:03,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:03,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:03,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:03,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:03,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:04,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:04,166 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 [2018-09-23 21:37:04,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:04,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:04,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:04,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:04,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:04,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-23 21:37:04,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:37:04,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:37:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:37:04,372 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-23 21:37:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:04,452 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 21:37:04,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:37:04,453 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-23 21:37:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:04,454 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:37:04,454 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 21:37:04,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:37:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 21:37:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 21:37:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 21:37:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 21:37:04,458 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-23 21:37:04,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:04,459 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 21:37:04,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:37:04,459 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 21:37:04,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 21:37:04,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:04,460 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-23 21:37:04,461 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:04,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:04,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-23 21:37:04,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:04,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:04,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:04,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:04,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:04,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:04,637 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 [2018-09-23 21:37:04,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:04,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 21:37:04,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:04,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:04,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:04,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-23 21:37:04,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:37:04,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:37:04,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:37:04,903 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-23 21:37:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:05,151 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 21:37:05,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:37:05,151 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-23 21:37:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:05,152 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:37:05,153 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 21:37:05,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:37:05,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 21:37:05,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 21:37:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 21:37:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 21:37:05,164 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-23 21:37:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:05,165 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 21:37:05,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:37:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 21:37:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:37:05,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:05,166 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-23 21:37:05,166 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:05,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:05,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-23 21:37:05,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:05,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:05,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:05,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:05,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:05,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:05,414 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 [2018-09-23 21:37:05,425 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:05,441 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:05,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:05,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:05,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:05,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-23 21:37:05,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:37:05,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:37:05,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:37:05,676 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-23 21:37:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:05,745 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 21:37:05,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:37:05,745 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-23 21:37:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:05,747 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:37:05,747 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 21:37:05,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:37:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 21:37:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 21:37:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:37:05,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 21:37:05,753 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-23 21:37:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:05,754 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 21:37:05,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:37:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 21:37:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:37:05,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:05,755 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-23 21:37:05,755 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:05,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:05,755 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-23 21:37:05,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:05,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:05,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:05,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:05,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:05,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:05,918 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 [2018-09-23 21:37:05,927 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:05,953 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 21:37:05,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:05,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:06,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:06,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-23 21:37:06,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:37:06,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:37:06,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:37:06,416 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-23 21:37:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:06,517 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 21:37:06,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:37:06,518 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-23 21:37:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:06,519 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:37:06,519 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 21:37:06,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:37:06,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 21:37:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 21:37:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 21:37:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 21:37:06,527 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-23 21:37:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:06,527 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 21:37:06,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:37:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 21:37:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 21:37:06,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:06,528 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-23 21:37:06,528 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:06,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:06,528 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-23 21:37:06,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:06,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:06,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:06,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:06,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:06,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:06,796 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 [2018-09-23 21:37:06,813 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:06,861 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:37:06,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:06,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:07,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:07,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-23 21:37:07,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:37:07,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:37:07,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:37:07,221 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-23 21:37:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:07,288 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 21:37:07,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:37:07,288 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-23 21:37:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:07,289 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:37:07,289 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 21:37:07,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:37:07,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 21:37:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 21:37:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 21:37:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 21:37:07,295 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-23 21:37:07,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:07,295 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 21:37:07,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:37:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 21:37:07,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:37:07,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:07,296 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-23 21:37:07,297 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:07,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-23 21:37:07,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:07,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:07,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:07,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:07,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:07,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:07,513 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 [2018-09-23 21:37:07,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:07,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:07,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:07,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-23 21:37:07,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:37:07,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:37:07,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:37:07,935 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-23 21:37:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:08,014 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 21:37:08,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:37:08,014 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-23 21:37:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:08,015 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:37:08,015 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:37:08,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:37:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:37:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 21:37:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:37:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 21:37:08,021 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-23 21:37:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:08,021 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 21:37:08,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:37:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 21:37:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 21:37:08,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:08,022 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-23 21:37:08,023 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:08,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:08,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-23 21:37:08,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:08,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:08,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:08,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:08,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:08,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:08,249 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 [2018-09-23 21:37:08,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:08,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:08,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:08,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:08,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:08,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-23 21:37:08,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:37:08,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:37:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:37:08,598 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-23 21:37:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:08,764 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 21:37:08,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:37:08,764 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-23 21:37:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:08,765 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:37:08,766 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 21:37:08,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:37:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 21:37:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 21:37:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:37:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 21:37:08,772 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-23 21:37:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:08,772 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 21:37:08,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:37:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 21:37:08,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:37:08,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:08,773 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-23 21:37:08,773 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:08,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:08,774 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-23 21:37:08,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:08,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:08,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:08,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:08,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:09,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:09,003 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 [2018-09-23 21:37:09,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:09,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 21:37:09,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:09,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:09,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:09,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-23 21:37:09,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:37:09,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:37:09,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:37:09,645 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-23 21:37:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:09,757 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 21:37:09,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:37:09,757 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-23 21:37:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:09,758 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:37:09,758 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 21:37:09,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:37:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 21:37:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 21:37:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 21:37:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 21:37:09,765 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-23 21:37:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:09,765 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 21:37:09,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:37:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 21:37:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 21:37:09,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:09,766 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-23 21:37:09,766 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:09,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:09,766 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-23 21:37:09,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:09,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:09,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:09,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:09,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:10,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:10,088 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 [2018-09-23 21:37:10,095 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:10,104 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:10,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:10,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:10,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:10,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-23 21:37:10,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:37:10,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:37:10,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:37:10,398 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-23 21:37:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:10,474 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 21:37:10,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:37:10,474 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-23 21:37:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:10,475 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:37:10,476 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 21:37:10,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:37:10,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 21:37:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 21:37:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 21:37:10,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 21:37:10,482 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-23 21:37:10,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:10,483 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 21:37:10,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:37:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 21:37:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 21:37:10,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:10,484 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-23 21:37:10,484 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:10,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-23 21:37:10,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:10,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:10,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:10,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:10,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:10,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:10,821 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 [2018-09-23 21:37:10,828 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:10,844 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 21:37:10,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:10,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:11,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:11,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-23 21:37:11,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:37:11,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:37:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:37:11,396 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-23 21:37:11,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:11,680 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 21:37:11,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:37:11,681 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-23 21:37:11,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:11,682 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:37:11,682 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 21:37:11,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:37:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 21:37:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 21:37:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:37:11,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 21:37:11,688 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-23 21:37:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:11,688 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 21:37:11,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:37:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 21:37:11,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 21:37:11,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:11,690 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-23 21:37:11,690 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:11,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:11,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-23 21:37:11,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:11,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:11,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:11,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:11,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:12,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:12,147 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 [2018-09-23 21:37:12,154 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:12,196 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:37:12,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:12,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:12,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:12,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-23 21:37:12,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:37:12,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:37:12,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:37:12,855 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-23 21:37:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:12,936 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 21:37:12,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:37:12,937 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-23 21:37:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:12,938 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:37:12,938 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 21:37:12,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:37:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 21:37:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 21:37:12,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 21:37:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 21:37:12,944 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-23 21:37:12,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:12,944 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 21:37:12,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:37:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 21:37:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 21:37:12,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:12,945 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-23 21:37:12,945 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:12,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-23 21:37:12,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:12,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:12,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:12,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:12,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:13,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:13,495 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 [2018-09-23 21:37:13,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:13,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:14,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:14,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-23 21:37:14,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:37:14,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:37:14,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:37:14,311 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-23 21:37:14,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:14,500 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 21:37:14,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:37:14,500 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-23 21:37:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:14,501 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:37:14,501 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 21:37:14,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:37:14,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 21:37:14,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 21:37:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 21:37:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 21:37:14,507 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-23 21:37:14,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:14,507 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 21:37:14,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:37:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 21:37:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 21:37:14,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:14,508 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-23 21:37:14,509 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:14,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:14,509 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-23 21:37:14,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:14,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:14,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:14,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:14,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:15,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:15,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:37:15,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:15,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:15,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:15,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:15,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:15,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-23 21:37:15,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:37:15,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:37:15,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:37:15,553 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-23 21:37:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:15,649 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 21:37:15,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:37:15,650 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-23 21:37:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:15,651 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:37:15,651 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 21:37:15,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:37:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 21:37:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 21:37:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:37:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 21:37:15,658 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-23 21:37:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:15,658 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 21:37:15,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:37:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 21:37:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 21:37:15,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:15,659 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-23 21:37:15,660 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:15,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:15,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-23 21:37:15,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:15,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:15,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:15,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:15,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:16,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:16,489 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 [2018-09-23 21:37:16,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:16,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 21:37:16,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:16,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:16,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:16,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-23 21:37:16,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:37:16,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:37:16,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:37:16,919 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-23 21:37:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:17,059 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 21:37:17,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:37:17,061 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-23 21:37:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:17,061 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:37:17,061 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 21:37:17,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:37:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 21:37:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 21:37:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 21:37:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 21:37:17,066 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-23 21:37:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:17,067 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 21:37:17,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:37:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 21:37:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 21:37:17,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:17,068 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-23 21:37:17,068 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:17,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:17,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-23 21:37:17,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:17,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:17,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:17,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:17,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:18,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:18,074 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 [2018-09-23 21:37:18,083 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:18,099 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:18,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:18,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:18,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:18,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-23 21:37:18,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:37:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:37:18,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:37:18,673 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-23 21:37:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:18,764 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 21:37:18,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:37:18,765 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-23 21:37:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:18,766 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:37:18,766 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 21:37:18,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:37:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 21:37:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 21:37:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:37:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 21:37:18,772 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-23 21:37:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:18,772 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 21:37:18,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:37:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 21:37:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 21:37:18,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:18,773 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-23 21:37:18,773 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:18,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:18,774 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-23 21:37:18,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:18,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:18,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:18,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:18,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:19,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:19,242 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 [2018-09-23 21:37:19,249 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:19,273 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 21:37:19,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:19,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:19,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:19,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-23 21:37:19,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:37:19,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:37:19,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:37:19,791 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-23 21:37:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:19,913 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 21:37:19,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:37:19,913 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-23 21:37:19,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:19,914 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:37:19,914 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 21:37:19,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:37:19,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 21:37:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 21:37:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 21:37:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 21:37:19,920 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-23 21:37:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:19,921 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 21:37:19,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:37:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 21:37:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 21:37:19,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:19,922 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-23 21:37:19,922 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:19,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:19,922 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-23 21:37:19,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:19,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:19,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:19,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:19,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:20,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:20,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:37:20,398 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:20,423 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:37:20,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:20,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:20,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:20,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-23 21:37:20,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:37:20,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:37:20,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:37:20,879 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-23 21:37:21,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:21,028 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 21:37:21,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:37:21,028 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-23 21:37:21,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:21,029 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:37:21,029 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 21:37:21,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:37:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 21:37:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 21:37:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 21:37:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 21:37:21,035 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-23 21:37:21,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:21,035 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 21:37:21,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:37:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 21:37:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:37:21,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:21,036 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-23 21:37:21,036 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:21,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:21,037 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-23 21:37:21,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:21,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:21,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:21,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:21,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:21,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:21,516 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 [2018-09-23 21:37:21,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:21,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:22,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:22,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-23 21:37:22,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:37:22,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:37:22,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:37:22,011 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-23 21:37:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:22,152 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 21:37:22,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:37:22,153 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-23 21:37:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:22,153 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:37:22,154 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:37:22,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:37:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:37:22,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 21:37:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:37:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 21:37:22,165 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-23 21:37:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:22,165 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 21:37:22,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:37:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 21:37:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 21:37:22,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:22,168 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-23 21:37:22,168 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:22,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-23 21:37:22,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:22,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:22,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:22,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:22,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:22,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:22,819 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 [2018-09-23 21:37:22,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:22,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:22,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:22,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:23,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:23,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-23 21:37:23,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:37:23,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:37:23,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:37:23,391 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-23 21:37:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:23,563 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 21:37:23,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:37:23,563 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-23 21:37:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:23,564 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:37:23,564 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 21:37:23,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:37:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 21:37:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 21:37:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 21:37:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 21:37:23,569 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-23 21:37:23,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:23,570 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 21:37:23,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:37:23,570 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 21:37:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 21:37:23,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:23,571 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-23 21:37:23,571 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:23,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:23,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-23 21:37:23,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:23,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:23,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:23,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:23,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:24,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:24,014 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 [2018-09-23 21:37:24,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:24,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 21:37:24,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:24,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:24,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:24,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-23 21:37:24,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:37:24,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:37:24,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:37:24,586 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-23 21:37:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:24,706 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 21:37:24,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:37:24,707 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-23 21:37:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:24,707 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:37:24,708 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 21:37:24,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:37:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 21:37:24,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 21:37:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 21:37:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 21:37:24,712 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-23 21:37:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:24,712 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 21:37:24,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:37:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 21:37:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 21:37:24,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:24,713 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-23 21:37:24,713 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:24,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:24,714 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-23 21:37:24,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:24,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:24,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:24,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:24,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:25,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:25,199 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 [2018-09-23 21:37:25,214 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:25,250 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:25,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:25,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:26,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:26,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-23 21:37:26,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:37:26,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:37:26,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:37:26,708 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-23 21:37:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:26,937 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 21:37:26,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:37:26,937 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-23 21:37:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:26,938 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:37:26,938 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 21:37:26,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:37:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 21:37:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 21:37:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 21:37:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 21:37:26,944 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-23 21:37:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:26,944 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 21:37:26,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:37:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 21:37:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 21:37:26,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:26,945 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-23 21:37:26,945 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:26,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-23 21:37:26,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:26,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:26,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:26,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:26,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:27,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:27,736 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 [2018-09-23 21:37:27,743 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:27,770 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 21:37:27,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:27,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:28,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:28,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-23 21:37:28,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:37:28,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:37:28,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:37:28,359 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-23 21:37:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:28,503 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 21:37:28,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:37:28,503 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-23 21:37:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:28,504 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:37:28,504 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 21:37:28,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:37:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 21:37:28,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 21:37:28,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 21:37:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 21:37:28,509 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-23 21:37:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:28,510 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 21:37:28,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:37:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 21:37:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 21:37:28,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:28,511 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-23 21:37:28,511 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:28,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:28,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-23 21:37:28,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:28,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:28,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:28,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:28,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:29,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:29,206 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 [2018-09-23 21:37:29,226 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:29,291 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 21:37:29,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:29,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:29,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:29,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-23 21:37:29,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:37:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:37:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:37:29,913 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-23 21:37:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:30,030 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 21:37:30,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:37:30,031 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-23 21:37:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:30,032 INFO L225 Difference]: With dead ends: 67 [2018-09-23 21:37:30,032 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 21:37:30,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:37:30,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 21:37:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 21:37:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 21:37:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 21:37:30,037 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-23 21:37:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:30,038 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 21:37:30,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:37:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 21:37:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 21:37:30,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:30,039 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-23 21:37:30,039 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:30,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:30,039 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-23 21:37:30,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:30,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:30,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:30,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:30,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:30,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:30,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:37:30,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:30,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:31,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:31,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-23 21:37:31,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:37:31,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:37:31,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:37:31,361 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-23 21:37:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:31,536 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 21:37:31,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:37:31,536 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-23 21:37:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:31,538 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:37:31,538 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 21:37:31,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:37:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 21:37:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 21:37:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 21:37:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 21:37:31,543 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-23 21:37:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:31,543 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 21:37:31,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:37:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 21:37:31,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 21:37:31,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:31,544 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-23 21:37:31,544 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:31,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:31,544 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-23 21:37:31,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:31,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:31,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:31,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:31,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:32,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:32,959 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 [2018-09-23 21:37:32,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:32,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:32,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:32,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:33,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:33,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-23 21:37:33,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:37:33,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:37:33,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:37:33,735 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-23 21:37:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:33,862 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 21:37:33,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:37:33,863 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-23 21:37:33,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:33,864 INFO L225 Difference]: With dead ends: 71 [2018-09-23 21:37:33,864 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 21:37:33,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:37:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 21:37:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 21:37:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 21:37:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 21:37:33,869 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-23 21:37:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:33,869 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 21:37:33,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:37:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 21:37:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 21:37:33,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:33,870 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-23 21:37:33,871 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:33,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-23 21:37:33,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:33,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:33,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:33,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:33,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:34,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:34,565 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 [2018-09-23 21:37:34,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:34,605 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 21:37:34,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:34,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:35,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:35,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-23 21:37:35,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:37:35,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:37:35,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:37:35,354 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-23 21:37:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:35,574 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 21:37:35,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:37:35,575 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-23 21:37:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:35,576 INFO L225 Difference]: With dead ends: 73 [2018-09-23 21:37:35,576 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 21:37:35,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:37:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 21:37:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 21:37:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 21:37:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 21:37:35,580 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-23 21:37:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:35,580 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 21:37:35,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:37:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 21:37:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 21:37:35,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:35,581 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-23 21:37:35,581 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:35,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:35,581 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-23 21:37:35,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:35,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:35,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:35,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:35,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:36,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:36,356 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 [2018-09-23 21:37:36,363 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:36,383 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:36,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:36,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:37,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:37,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-23 21:37:37,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:37:37,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:37:37,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:37:37,136 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-23 21:37:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:37,350 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 21:37:37,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:37:37,350 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-23 21:37:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:37,351 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:37:37,352 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 21:37:37,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:37:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 21:37:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 21:37:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 21:37:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 21:37:37,357 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-23 21:37:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:37,357 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 21:37:37,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:37:37,357 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 21:37:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 21:37:37,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:37,358 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-23 21:37:37,358 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:37,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:37,359 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-23 21:37:37,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:37,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:37,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:37,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:37,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:38,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:38,252 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 [2018-09-23 21:37:38,259 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:38,313 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 21:37:38,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:38,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:39,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:39,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-23 21:37:39,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:37:39,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:37:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:37:39,145 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-23 21:37:39,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:39,566 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 21:37:39,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:37:39,566 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-23 21:37:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:39,567 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:37:39,567 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 21:37:39,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:37:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 21:37:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 21:37:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 21:37:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 21:37:39,572 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-23 21:37:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:39,572 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 21:37:39,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:37:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 21:37:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 21:37:39,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:39,572 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-23 21:37:39,573 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:39,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:39,573 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-23 21:37:39,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:39,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:39,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:39,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:39,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:40,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:40,507 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 [2018-09-23 21:37:40,514 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:40,559 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 21:37:40,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:40,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:41,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:41,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-23 21:37:41,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:37:41,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:37:41,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:37:41,394 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-23 21:37:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:41,566 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 21:37:41,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:37:41,567 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-23 21:37:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:41,568 INFO L225 Difference]: With dead ends: 79 [2018-09-23 21:37:41,568 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 21:37:41,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:37:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 21:37:41,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 21:37:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 21:37:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 21:37:41,572 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-23 21:37:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:41,573 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 21:37:41,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:37:41,573 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 21:37:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 21:37:41,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:41,574 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-23 21:37:41,574 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:41,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:41,574 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-23 21:37:41,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:41,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:41,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:41,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:41,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:42,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:42,413 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 [2018-09-23 21:37:42,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:42,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:43,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:43,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-23 21:37:43,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:37:43,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:37:43,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:37:43,577 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-23 21:37:43,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:43,733 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 21:37:43,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:37:43,733 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-23 21:37:43,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:43,734 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:37:43,734 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 21:37:43,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:37:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 21:37:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 21:37:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 21:37:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 21:37:43,739 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-23 21:37:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:43,739 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 21:37:43,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:37:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 21:37:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 21:37:43,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:43,740 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-23 21:37:43,740 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:43,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:43,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-23 21:37:43,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:43,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:43,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:43,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:43,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:44,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:44,602 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 [2018-09-23 21:37:44,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:44,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:44,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:44,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:45,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:45,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-23 21:37:45,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:37:45,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:37:45,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:37:45,573 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-23 21:37:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:45,751 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 21:37:45,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:37:45,752 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-23 21:37:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:45,753 INFO L225 Difference]: With dead ends: 83 [2018-09-23 21:37:45,753 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 21:37:45,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:37:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 21:37:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 21:37:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 21:37:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 21:37:45,758 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-23 21:37:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:45,758 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 21:37:45,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:37:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 21:37:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 21:37:45,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:45,759 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-23 21:37:45,759 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:45,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:45,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-23 21:37:45,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:45,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:45,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:45,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:45,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:46,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:46,782 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 [2018-09-23 21:37:46,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:46,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 21:37:46,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:46,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:47,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:47,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-23 21:37:47,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:37:47,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:37:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:37:47,837 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-23 21:37:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:48,088 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 21:37:48,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:37:48,088 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-23 21:37:48,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:48,089 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:37:48,089 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 21:37:48,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:37:48,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 21:37:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 21:37:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 21:37:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 21:37:48,092 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-23 21:37:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:48,093 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 21:37:48,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:37:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 21:37:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 21:37:48,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:48,093 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-23 21:37:48,094 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:48,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:48,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-23 21:37:48,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:48,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:48,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:48,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:48,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:49,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:49,057 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 [2018-09-23 21:37:49,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:49,086 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:49,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:49,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:50,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:50,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-23 21:37:50,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:37:50,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:37:50,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:37:50,100 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-23 21:37:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:50,269 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 21:37:50,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:37:50,270 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-23 21:37:50,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:50,271 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:37:50,271 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 21:37:50,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:37:50,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 21:37:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 21:37:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 21:37:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-23 21:37:50,276 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-23 21:37:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:50,276 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-23 21:37:50,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:37:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-23 21:37:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 21:37:50,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:50,277 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-23 21:37:50,277 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:50,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:50,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-23 21:37:50,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:50,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:50,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:50,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:50,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:51,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:51,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:37:51,182 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:51,232 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 21:37:51,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:51,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:52,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:52,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-23 21:37:52,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:37:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:37:52,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:37:52,376 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-23 21:37:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:52,668 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 21:37:52,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:37:52,668 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-23 21:37:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:52,670 INFO L225 Difference]: With dead ends: 89 [2018-09-23 21:37:52,670 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 21:37:52,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:37:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 21:37:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 21:37:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 21:37:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-23 21:37:52,675 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-23 21:37:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:52,676 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-23 21:37:52,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:37:52,676 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-23 21:37:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 21:37:52,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:52,677 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-23 21:37:52,677 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:52,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:52,677 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-23 21:37:52,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:52,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:52,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:52,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:52,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:53,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:53,879 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 [2018-09-23 21:37:53,887 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:53,928 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 21:37:53,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:53,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:55,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:55,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-23 21:37:55,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:37:55,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:37:55,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:37:55,166 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-23 21:37:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:55,376 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 21:37:55,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:37:55,377 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-23 21:37:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:55,378 INFO L225 Difference]: With dead ends: 91 [2018-09-23 21:37:55,378 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 21:37:55,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:37:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 21:37:55,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 21:37:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 21:37:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-23 21:37:55,384 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-23 21:37:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:55,384 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-23 21:37:55,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:37:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-23 21:37:55,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 21:37:55,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:55,384 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-23 21:37:55,385 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:55,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:55,385 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-23 21:37:55,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:55,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:55,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:55,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:55,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:56,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:56,276 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 [2018-09-23 21:37:56,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:56,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:57,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:57,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-23 21:37:57,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:37:57,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:37:57,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:37:57,488 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-23 21:37:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:57,663 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 21:37:57,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:37:57,664 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-23 21:37:57,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:57,665 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:37:57,665 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 21:37:57,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:37:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 21:37:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 21:37:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 21:37:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-23 21:37:57,670 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-23 21:37:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:57,670 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-23 21:37:57,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:37:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-23 21:37:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 21:37:57,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:57,671 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-23 21:37:57,671 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:57,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:57,672 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-23 21:37:57,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:57,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:57,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:57,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:57,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:59,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:59,049 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 [2018-09-23 21:37:59,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:59,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:59,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:59,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:00,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:00,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-23 21:38:00,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 21:38:00,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 21:38:00,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:38:00,275 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-23 21:38:00,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:00,465 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 21:38:00,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:38:00,465 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-23 21:38:00,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:00,466 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:38:00,466 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 21:38:00,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:38:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 21:38:00,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 21:38:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 21:38:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-23 21:38:00,472 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-23 21:38:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:00,473 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-23 21:38:00,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 21:38:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-23 21:38:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 21:38:00,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:00,474 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-23 21:38:00,474 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:00,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:00,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-23 21:38:00,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:00,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:00,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:00,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:00,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:01,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:01,593 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 [2018-09-23 21:38:01,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:38:01,714 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 21:38:01,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:01,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:03,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:03,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-23 21:38:03,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 21:38:03,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 21:38:03,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:38:03,107 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-23 21:38:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:03,345 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 21:38:03,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:38:03,345 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-23 21:38:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:03,346 INFO L225 Difference]: With dead ends: 97 [2018-09-23 21:38:03,346 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 21:38:03,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:38:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 21:38:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 21:38:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 21:38:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-23 21:38:03,349 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-23 21:38:03,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:03,350 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-23 21:38:03,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 21:38:03,350 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-23 21:38:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 21:38:03,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:03,350 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-23 21:38:03,351 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:03,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-23 21:38:03,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:03,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:03,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:03,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:03,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:04,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:04,421 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 [2018-09-23 21:38:04,429 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:38:04,455 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:38:04,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:04,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:05,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:05,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-23 21:38:05,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 21:38:05,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 21:38:05,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:38:05,774 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-23 21:38:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:05,962 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 21:38:05,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:38:05,962 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-23 21:38:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:05,964 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:38:05,964 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 21:38:05,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:38:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 21:38:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 21:38:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 21:38:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-23 21:38:05,969 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-23 21:38:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:05,970 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-23 21:38:05,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 21:38:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-23 21:38:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 21:38:05,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:05,971 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-23 21:38:05,971 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:05,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:05,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-23 21:38:05,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:05,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:05,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:05,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:05,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:07,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:07,449 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 [2018-09-23 21:38:07,456 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:38:07,502 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 21:38:07,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:07,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:09,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:09,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-23 21:38:09,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 21:38:09,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 21:38:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:38:09,165 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-23 21:38:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:09,395 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 21:38:09,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:38:09,395 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-23 21:38:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:09,396 INFO L225 Difference]: With dead ends: 101 [2018-09-23 21:38:09,397 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 21:38:09,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:38:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 21:38:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 21:38:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 21:38:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-23 21:38:09,401 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-23 21:38:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:09,402 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-23 21:38:09,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 21:38:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-23 21:38:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 21:38:09,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:09,402 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-23 21:38:09,403 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:09,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-23 21:38:09,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:09,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:09,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:09,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:09,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:10,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:10,557 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 [2018-09-23 21:38:10,564 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:38:10,614 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 21:38:10,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:10,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:12,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:12,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-23 21:38:12,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 21:38:12,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 21:38:12,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:38:12,046 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-23 21:38:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:12,294 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 21:38:12,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:38:12,295 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-23 21:38:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:12,296 INFO L225 Difference]: With dead ends: 103 [2018-09-23 21:38:12,296 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 21:38:12,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:38:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 21:38:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 21:38:12,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 21:38:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-23 21:38:12,302 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-23 21:38:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:12,302 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-23 21:38:12,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 21:38:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-23 21:38:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 21:38:12,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:12,303 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-23 21:38:12,303 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:12,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:12,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-23 21:38:12,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:12,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:12,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:12,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:12,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:13,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:13,576 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 [2018-09-23 21:38:13,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:13,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:15,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:15,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-23 21:38:15,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 21:38:15,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 21:38:15,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:38:15,761 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-23 21:38:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:16,021 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 21:38:16,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:38:16,022 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-23 21:38:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:16,023 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:38:16,023 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 21:38:16,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:38:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 21:38:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 21:38:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 21:38:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-23 21:38:16,029 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-23 21:38:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:16,029 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-23 21:38:16,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 21:38:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-23 21:38:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 21:38:16,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:16,030 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-23 21:38:16,030 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:16,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:16,031 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-23 21:38:16,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:16,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:16,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:16,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:16,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:17,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:17,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:38:17,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:38:17,289 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:38:17,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:17,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:19,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:19,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-23 21:38:19,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 21:38:19,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 21:38:19,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:38:19,152 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-23 21:38:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:20,967 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 21:38:20,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:38:20,968 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-23 21:38:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:20,969 INFO L225 Difference]: With dead ends: 107 [2018-09-23 21:38:20,969 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 21:38:20,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:38:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 21:38:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 21:38:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 21:38:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-23 21:38:20,974 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-23 21:38:20,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:20,975 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-23 21:38:20,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 21:38:20,975 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-23 21:38:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 21:38:20,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:20,975 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-23 21:38:20,976 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:20,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:20,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-23 21:38:20,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:20,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:20,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:20,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:20,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:22,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:22,877 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 [2018-09-23 21:38:22,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:38:22,950 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 21:38:22,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:22,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:24,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:24,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-23 21:38:24,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 21:38:24,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 21:38:24,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:38:24,822 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-23 21:38:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:25,034 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 21:38:25,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:38:25,034 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-23 21:38:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:25,035 INFO L225 Difference]: With dead ends: 109 [2018-09-23 21:38:25,036 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 21:38:25,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:38:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 21:38:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 21:38:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 21:38:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-23 21:38:25,041 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-23 21:38:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:25,042 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-23 21:38:25,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 21:38:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-23 21:38:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 21:38:25,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:25,043 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-23 21:38:25,043 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:25,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:25,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-23 21:38:25,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:25,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:25,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:25,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:25,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:26,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:26,306 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 [2018-09-23 21:38:26,322 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:38:26,365 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:38:26,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:26,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:28,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:28,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-23 21:38:28,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 21:38:28,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 21:38:28,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:38:28,116 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-23 21:38:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:28,324 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 21:38:28,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:38:28,325 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-23 21:38:28,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:28,326 INFO L225 Difference]: With dead ends: 111 [2018-09-23 21:38:28,326 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 21:38:28,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:38:28,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 21:38:28,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 21:38:28,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 21:38:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-23 21:38:28,331 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-23 21:38:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:28,331 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-23 21:38:28,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 21:38:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-23 21:38:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 21:38:28,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:28,332 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-23 21:38:28,332 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:28,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:28,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-23 21:38:28,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:28,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:28,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:28,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:28,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:30,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:30,252 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) [2018-09-23 21:38:30,269 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:30,409 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-23 21:38:30,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:30,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:32,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:32,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-23 21:38:32,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 21:38:32,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 21:38:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:38:32,073 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-23 21:38:32,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:32,285 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 21:38:32,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:38:32,285 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-23 21:38:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:32,287 INFO L225 Difference]: With dead ends: 113 [2018-09-23 21:38:32,287 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 21:38:32,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:38:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 21:38:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 21:38:32,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 21:38:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-23 21:38:32,292 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-23 21:38:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:32,292 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-23 21:38:32,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 21:38:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-23 21:38:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 21:38:32,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:32,292 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-23 21:38:32,293 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:32,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-23 21:38:32,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:32,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:32,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:32,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:32,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:33,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:33,659 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 [2018-09-23 21:38:33,666 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:38:33,720 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 21:38:33,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:33,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:35,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:35,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-23 21:38:35,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-23 21:38:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-23 21:38:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 21:38:35,742 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-23 21:38:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:36,002 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 21:38:36,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:38:36,002 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-23 21:38:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:36,003 INFO L225 Difference]: With dead ends: 115 [2018-09-23 21:38:36,004 INFO L226 Difference]: Without dead ends: 114 [2018-09-23 21:38:36,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 21:38:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-23 21:38:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-23 21:38:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 21:38:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-23 21:38:36,009 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-23 21:38:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:36,010 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-23 21:38:36,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-23 21:38:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-23 21:38:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 21:38:36,011 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:36,011 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-23 21:38:36,011 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:36,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:36,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-23 21:38:36,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:36,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:36,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:36,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:36,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:37,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:37,790 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 [2018-09-23 21:38:37,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:37,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:39,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:39,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-23 21:38:39,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-23 21:38:39,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-23 21:38:39,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 21:38:39,837 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-23 21:38:40,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:40,266 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-23 21:38:40,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:38:40,267 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-23 21:38:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:40,268 INFO L225 Difference]: With dead ends: 117 [2018-09-23 21:38:40,268 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 21:38:40,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 21:38:40,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 21:38:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-23 21:38:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 21:38:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-23 21:38:40,274 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-23 21:38:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:40,274 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-23 21:38:40,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-23 21:38:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-23 21:38:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-23 21:38:40,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:40,275 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-23 21:38:40,276 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:40,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:40,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-23 21:38:40,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:40,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:40,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:40,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:40,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:41,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:41,795 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 [2018-09-23 21:38:41,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:38:41,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:38:41,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:41,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:43,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:43,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-23 21:38:43,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-23 21:38:43,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-23 21:38:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 21:38:43,716 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-23 21:38:44,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:44,018 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-23 21:38:44,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:38:44,019 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-23 21:38:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:44,020 INFO L225 Difference]: With dead ends: 119 [2018-09-23 21:38:44,020 INFO L226 Difference]: Without dead ends: 118 [2018-09-23 21:38:44,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 21:38:44,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-23 21:38:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-23 21:38:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-23 21:38:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-23 21:38:44,025 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-23 21:38:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:44,025 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-23 21:38:44,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-23 21:38:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-23 21:38:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-23 21:38:44,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:44,026 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-23 21:38:44,026 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:44,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-23 21:38:44,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:44,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:44,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:44,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:44,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:45,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:45,772 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 [2018-09-23 21:38:45,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:38:45,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-23 21:38:45,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:45,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:47,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:47,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-23 21:38:47,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-23 21:38:47,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-23 21:38:47,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 21:38:47,875 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-23 21:38:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:48,131 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-23 21:38:48,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:38:48,132 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-23 21:38:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:48,133 INFO L225 Difference]: With dead ends: 121 [2018-09-23 21:38:48,133 INFO L226 Difference]: Without dead ends: 120 [2018-09-23 21:38:48,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 21:38:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-23 21:38:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-23 21:38:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-23 21:38:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-23 21:38:48,139 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-23 21:38:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:48,139 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-23 21:38:48,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-23 21:38:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-23 21:38:48,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-23 21:38:48,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:48,140 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-23 21:38:48,140 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:48,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:48,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-23 21:38:48,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:48,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:48,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:48,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:48,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:50,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:50,348 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 [2018-09-23 21:38:50,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:38:50,391 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:38:50,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:50,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:52,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:52,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-23 21:38:52,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-23 21:38:52,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-23 21:38:52,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 21:38:52,729 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-23 21:38:53,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:53,018 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-23 21:38:53,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:38:53,018 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-23 21:38:53,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:53,019 INFO L225 Difference]: With dead ends: 123 [2018-09-23 21:38:53,019 INFO L226 Difference]: Without dead ends: 122 [2018-09-23 21:38:53,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 21:38:53,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-23 21:38:53,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-23 21:38:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-23 21:38:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-23 21:38:53,023 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-23 21:38:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:53,024 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-23 21:38:53,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-23 21:38:53,024 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-23 21:38:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-23 21:38:53,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:53,025 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-23 21:38:53,025 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:53,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:53,025 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-23 21:38:53,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:53,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:53,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:53,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:53,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:55,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:55,040 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 [2018-09-23 21:38:55,047 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:38:55,111 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-23 21:38:55,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:55,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:57,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:57,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-23 21:38:57,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-23 21:38:57,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-23 21:38:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 21:38:57,296 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-23 21:38:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:57,559 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-23 21:38:57,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:38:57,559 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-23 21:38:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:57,560 INFO L225 Difference]: With dead ends: 125 [2018-09-23 21:38:57,561 INFO L226 Difference]: Without dead ends: 124 [2018-09-23 21:38:57,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 21:38:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-23 21:38:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-23 21:38:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-23 21:38:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-23 21:38:57,566 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-23 21:38:57,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:57,567 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-23 21:38:57,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-23 21:38:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-23 21:38:57,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-23 21:38:57,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:57,568 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-23 21:38:57,568 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:57,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:57,568 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-23 21:38:57,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:57,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:57,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:57,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:57,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:00,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:00,413 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 [2018-09-23 21:39:00,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:00,482 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-23 21:39:00,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:00,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:02,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:02,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-23 21:39:02,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-23 21:39:02,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-23 21:39:02,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 21:39:02,584 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-23 21:39:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:02,838 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-23 21:39:02,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:39:02,838 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-23 21:39:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:02,839 INFO L225 Difference]: With dead ends: 127 [2018-09-23 21:39:02,839 INFO L226 Difference]: Without dead ends: 126 [2018-09-23 21:39:02,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 21:39:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-23 21:39:02,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-23 21:39:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-23 21:39:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-23 21:39:02,843 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-23 21:39:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:02,844 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-23 21:39:02,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-23 21:39:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-23 21:39:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-23 21:39:02,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:02,844 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-23 21:39:02,845 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:02,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:02,845 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-23 21:39:02,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:02,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:02,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:02,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:02,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:04,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:04,532 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 [2018-09-23 21:39:04,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:04,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:06,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:06,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-23 21:39:06,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-23 21:39:06,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-23 21:39:06,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 21:39:06,914 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-23 21:39:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:07,226 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-23 21:39:07,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:39:07,226 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-23 21:39:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:07,227 INFO L225 Difference]: With dead ends: 129 [2018-09-23 21:39:07,227 INFO L226 Difference]: Without dead ends: 128 [2018-09-23 21:39:07,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 21:39:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-23 21:39:07,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-23 21:39:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-23 21:39:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-23 21:39:07,232 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-23 21:39:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:07,232 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-23 21:39:07,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-23 21:39:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-23 21:39:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-23 21:39:07,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:07,232 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-23 21:39:07,233 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:07,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-23 21:39:07,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:07,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:07,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:07,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:07,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:09,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:09,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:39:09,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:09,057 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:09,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:09,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:11,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:11,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-23 21:39:11,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-23 21:39:11,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-23 21:39:11,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 21:39:11,576 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-23 21:39:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:11,834 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-23 21:39:11,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:39:11,834 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-23 21:39:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:11,836 INFO L225 Difference]: With dead ends: 131 [2018-09-23 21:39:11,836 INFO L226 Difference]: Without dead ends: 130 [2018-09-23 21:39:11,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 21:39:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-23 21:39:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-23 21:39:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-23 21:39:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-23 21:39:11,841 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-23 21:39:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:11,842 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-23 21:39:11,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-23 21:39:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-23 21:39:11,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-23 21:39:11,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:11,843 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-23 21:39:11,843 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:11,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-23 21:39:11,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:11,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:11,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:11,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:11,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:13,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:13,617 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 [2018-09-23 21:39:13,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:13,693 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-23 21:39:13,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:13,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:16,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:16,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-23 21:39:16,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-23 21:39:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-23 21:39:16,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 21:39:16,168 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-23 21:39:16,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:16,471 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-23 21:39:16,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:39:16,471 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-23 21:39:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:16,472 INFO L225 Difference]: With dead ends: 133 [2018-09-23 21:39:16,473 INFO L226 Difference]: Without dead ends: 132 [2018-09-23 21:39:16,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 21:39:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-23 21:39:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-23 21:39:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-23 21:39:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-23 21:39:16,477 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-23 21:39:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:16,478 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-23 21:39:16,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-23 21:39:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-23 21:39:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-23 21:39:16,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:16,479 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-23 21:39:16,479 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:16,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-23 21:39:16,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:16,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:16,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:16,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:16,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:18,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:18,272 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 [2018-09-23 21:39:18,280 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:18,318 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:18,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:18,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:20,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:20,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-23 21:39:20,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-23 21:39:20,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-23 21:39:20,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 21:39:20,903 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-23 21:39:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:21,172 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-23 21:39:21,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:39:21,173 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-23 21:39:21,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:21,174 INFO L225 Difference]: With dead ends: 135 [2018-09-23 21:39:21,174 INFO L226 Difference]: Without dead ends: 134 [2018-09-23 21:39:21,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 21:39:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-23 21:39:21,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-23 21:39:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-23 21:39:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-23 21:39:21,179 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-23 21:39:21,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:21,180 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-23 21:39:21,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-23 21:39:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-23 21:39:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-23 21:39:21,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:21,180 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-23 21:39:21,181 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:21,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:21,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-23 21:39:21,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:21,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:21,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:21,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:21,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:23,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:23,151 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 [2018-09-23 21:39:23,159 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:23,233 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-23 21:39:23,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:23,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:27,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:27,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-23 21:39:27,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-23 21:39:27,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-23 21:39:27,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 21:39:27,014 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-23 21:39:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:27,357 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-23 21:39:27,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:39:27,357 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-23 21:39:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:27,358 INFO L225 Difference]: With dead ends: 137 [2018-09-23 21:39:27,359 INFO L226 Difference]: Without dead ends: 136 [2018-09-23 21:39:27,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 21:39:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-23 21:39:27,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-23 21:39:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-23 21:39:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-23 21:39:27,366 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-23 21:39:27,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:27,366 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-23 21:39:27,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-23 21:39:27,367 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-23 21:39:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-23 21:39:27,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:27,367 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-23 21:39:27,367 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:27,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:27,368 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-23 21:39:27,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:27,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:27,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:27,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:27,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:29,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:29,376 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 [2018-09-23 21:39:29,384 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:29,455 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-23 21:39:29,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:29,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:32,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:32,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-23 21:39:32,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-23 21:39:32,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-23 21:39:32,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 21:39:32,420 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-23 21:39:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:32,742 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-23 21:39:32,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:39:32,743 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-23 21:39:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:32,744 INFO L225 Difference]: With dead ends: 139 [2018-09-23 21:39:32,744 INFO L226 Difference]: Without dead ends: 138 [2018-09-23 21:39:32,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 21:39:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-23 21:39:32,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-23 21:39:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-23 21:39:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-23 21:39:32,750 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-23 21:39:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:32,750 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-23 21:39:32,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-23 21:39:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-23 21:39:32,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-23 21:39:32,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:32,752 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-23 21:39:32,752 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:32,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:32,752 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-23 21:39:32,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:32,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:32,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:32,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:32,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:34,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:34,745 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 [2018-09-23 21:39:34,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:34,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:37,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:37,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-23 21:39:37,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-23 21:39:37,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-23 21:39:37,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 21:39:37,472 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-23 21:39:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:37,798 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-23 21:39:37,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:39:37,799 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-23 21:39:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:37,800 INFO L225 Difference]: With dead ends: 141 [2018-09-23 21:39:37,800 INFO L226 Difference]: Without dead ends: 140 [2018-09-23 21:39:37,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 21:39:37,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-23 21:39:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-23 21:39:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-23 21:39:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-23 21:39:37,804 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-23 21:39:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:37,805 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-23 21:39:37,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-23 21:39:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-23 21:39:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-23 21:39:37,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:37,805 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-23 21:39:37,806 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:37,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:37,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-23 21:39:37,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:37,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:37,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:37,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:37,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:39,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:39,875 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 [2018-09-23 21:39:39,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:39,920 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:39,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:39,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:42,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:42,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-23 21:39:42,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-23 21:39:42,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-23 21:39:42,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 21:39:42,765 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-23 21:39:43,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:43,088 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-23 21:39:43,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:39:43,089 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-23 21:39:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:43,090 INFO L225 Difference]: With dead ends: 143 [2018-09-23 21:39:43,090 INFO L226 Difference]: Without dead ends: 142 [2018-09-23 21:39:43,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 21:39:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-23 21:39:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-23 21:39:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-23 21:39:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-23 21:39:43,094 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-23 21:39:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:43,094 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-23 21:39:43,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-23 21:39:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-23 21:39:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-23 21:39:43,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:43,095 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-23 21:39:43,095 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:43,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:43,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-23 21:39:43,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:43,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:43,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:43,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:43,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:45,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:45,141 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 [2018-09-23 21:39:45,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:45,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 21:39:45,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:45,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:48,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:48,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-23 21:39:48,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-23 21:39:48,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-23 21:39:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 21:39:48,133 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-23 21:39:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:48,503 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-23 21:39:48,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:39:48,503 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-23 21:39:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:48,505 INFO L225 Difference]: With dead ends: 145 [2018-09-23 21:39:48,505 INFO L226 Difference]: Without dead ends: 144 [2018-09-23 21:39:48,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 21:39:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-23 21:39:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-23 21:39:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-23 21:39:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-23 21:39:48,510 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-23 21:39:48,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:48,510 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-23 21:39:48,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-23 21:39:48,510 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-23 21:39:48,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-23 21:39:48,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:48,511 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-23 21:39:48,511 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:48,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:48,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-23 21:39:48,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:48,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:48,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:48,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:48,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:50,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:50,718 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 [2018-09-23 21:39:50,726 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:50,762 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:50,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:50,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:53,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:53,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-23 21:39:53,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-23 21:39:53,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-23 21:39:53,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 21:39:53,933 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-23 21:39:54,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:54,320 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-23 21:39:54,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:39:54,321 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-23 21:39:54,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:54,322 INFO L225 Difference]: With dead ends: 147 [2018-09-23 21:39:54,322 INFO L226 Difference]: Without dead ends: 146 [2018-09-23 21:39:54,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 21:39:54,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-23 21:39:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-23 21:39:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-23 21:39:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-23 21:39:54,327 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-23 21:39:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:54,328 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-23 21:39:54,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-23 21:39:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-23 21:39:54,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-23 21:39:54,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:54,329 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-23 21:39:54,329 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:54,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:54,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-23 21:39:54,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:54,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:54,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:54,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:54,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:56,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:56,910 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 [2018-09-23 21:39:56,917 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:57,102 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-23 21:39:57,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:57,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:00,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:00,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-23 21:40:00,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-23 21:40:00,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-23 21:40:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-23 21:40:00,272 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-23 21:40:00,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:00,638 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-23 21:40:00,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:40:00,638 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-23 21:40:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:00,640 INFO L225 Difference]: With dead ends: 149 [2018-09-23 21:40:00,640 INFO L226 Difference]: Without dead ends: 148 [2018-09-23 21:40:00,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-23 21:40:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-23 21:40:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-23 21:40:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-23 21:40:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-23 21:40:00,646 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-23 21:40:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:00,646 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-23 21:40:00,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-23 21:40:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-23 21:40:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-23 21:40:00,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:00,647 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-23 21:40:00,648 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:00,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:00,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-23 21:40:00,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:00,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:00,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:00,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:00,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:03,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:03,817 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 [2018-09-23 21:40:03,825 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:40:03,929 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-23 21:40:03,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:03,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:07,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:07,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-23 21:40:07,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-23 21:40:07,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-23 21:40:07,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-23 21:40:07,026 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-23 21:40:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:07,801 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-23 21:40:07,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:40:07,802 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-23 21:40:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:07,803 INFO L225 Difference]: With dead ends: 151 [2018-09-23 21:40:07,803 INFO L226 Difference]: Without dead ends: 150 [2018-09-23 21:40:07,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-23 21:40:07,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-23 21:40:07,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-23 21:40:07,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-23 21:40:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-23 21:40:07,809 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-23 21:40:07,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:07,809 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-23 21:40:07,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-23 21:40:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-23 21:40:07,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-23 21:40:07,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:07,810 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-23 21:40:07,810 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:07,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:07,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-23 21:40:07,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:07,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:07,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:07,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:07,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:10,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:10,217 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 [2018-09-23 21:40:10,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:10,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:13,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:13,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-23 21:40:13,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-23 21:40:13,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-23 21:40:13,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-23 21:40:13,616 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-23 21:40:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:13,994 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-23 21:40:13,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:40:13,995 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-23 21:40:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:13,996 INFO L225 Difference]: With dead ends: 153 [2018-09-23 21:40:13,996 INFO L226 Difference]: Without dead ends: 152 [2018-09-23 21:40:13,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-23 21:40:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-23 21:40:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-23 21:40:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-23 21:40:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-23 21:40:14,003 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-23 21:40:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:14,003 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-23 21:40:14,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-23 21:40:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-23 21:40:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-23 21:40:14,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:14,004 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-23 21:40:14,004 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:14,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:14,005 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-23 21:40:14,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:14,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:14,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:14,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:14,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:16,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:16,899 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 [2018-09-23 21:40:16,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:40:16,947 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:40:16,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:16,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:19,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:19,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-23 21:40:19,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-23 21:40:19,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-23 21:40:19,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-23 21:40:19,961 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-23 21:40:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:20,358 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-23 21:40:20,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:40:20,359 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-23 21:40:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:20,360 INFO L225 Difference]: With dead ends: 155 [2018-09-23 21:40:20,360 INFO L226 Difference]: Without dead ends: 154 [2018-09-23 21:40:20,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-23 21:40:20,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-23 21:40:20,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-23 21:40:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-23 21:40:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-23 21:40:20,365 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-23 21:40:20,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:20,365 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-23 21:40:20,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-23 21:40:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-23 21:40:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-23 21:40:20,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:20,366 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-23 21:40:20,366 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:20,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:20,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-23 21:40:20,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:20,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:20,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:20,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:20,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:23,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:23,074 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 [2018-09-23 21:40:23,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:40:23,171 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-23 21:40:23,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:23,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:26,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:26,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-23 21:40:26,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-23 21:40:26,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-23 21:40:26,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-23 21:40:26,262 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-23 21:40:26,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:26,791 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-23 21:40:26,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 21:40:26,792 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-23 21:40:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:26,793 INFO L225 Difference]: With dead ends: 157 [2018-09-23 21:40:26,793 INFO L226 Difference]: Without dead ends: 156 [2018-09-23 21:40:26,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-23 21:40:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-23 21:40:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-23 21:40:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-23 21:40:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-23 21:40:26,798 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-23 21:40:26,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:26,798 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-23 21:40:26,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-23 21:40:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-23 21:40:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-23 21:40:26,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:26,799 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-23 21:40:26,799 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:26,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:26,800 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-23 21:40:26,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:26,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:26,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:26,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:26,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:29,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:29,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:40:29,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:40:29,384 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:40:29,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:29,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:32,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:32,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-23 21:40:32,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-23 21:40:32,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-23 21:40:32,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-23 21:40:32,782 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-23 21:40:33,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:33,125 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-23 21:40:33,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 21:40:33,126 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-23 21:40:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:33,127 INFO L225 Difference]: With dead ends: 159 [2018-09-23 21:40:33,127 INFO L226 Difference]: Without dead ends: 158 [2018-09-23 21:40:33,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-23 21:40:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-23 21:40:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-23 21:40:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-23 21:40:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-23 21:40:33,132 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-23 21:40:33,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:33,132 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-23 21:40:33,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-23 21:40:33,132 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-23 21:40:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-23 21:40:33,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:33,133 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-23 21:40:33,133 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:33,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-23 21:40:33,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:33,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:33,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:33,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:33,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:35,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:35,697 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 [2018-09-23 21:40:35,704 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:40:35,827 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-23 21:40:35,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:35,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:39,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:39,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-23 21:40:39,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-23 21:40:39,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-23 21:40:39,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-23 21:40:39,402 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-23 21:40:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:39,772 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-23 21:40:39,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 21:40:39,773 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-23 21:40:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:39,774 INFO L225 Difference]: With dead ends: 161 [2018-09-23 21:40:39,774 INFO L226 Difference]: Without dead ends: 160 [2018-09-23 21:40:39,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-23 21:40:39,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-23 21:40:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-23 21:40:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-23 21:40:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-23 21:40:39,781 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-23 21:40:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:39,781 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-23 21:40:39,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-23 21:40:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-23 21:40:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-23 21:40:39,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:39,782 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-23 21:40:39,782 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:39,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-23 21:40:39,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:39,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:39,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:39,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:39,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:42,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:42,687 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 [2018-09-23 21:40:42,709 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:40:42,799 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-23 21:40:42,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:42,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:46,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:46,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-23 21:40:46,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-23 21:40:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-23 21:40:46,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-23 21:40:46,050 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-23 21:40:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:46,450 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-23 21:40:46,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 21:40:46,450 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-23 21:40:46,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:46,451 INFO L225 Difference]: With dead ends: 163 [2018-09-23 21:40:46,451 INFO L226 Difference]: Without dead ends: 162 [2018-09-23 21:40:46,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-23 21:40:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-23 21:40:46,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-23 21:40:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-23 21:40:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-23 21:40:46,457 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-23 21:40:46,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:46,457 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-23 21:40:46,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-23 21:40:46,457 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-23 21:40:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-23 21:40:46,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:46,458 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-23 21:40:46,458 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:46,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:46,459 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-23 21:40:46,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:46,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:46,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:46,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:46,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:49,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:49,384 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 [2018-09-23 21:40:49,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:49,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:53,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:53,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-23 21:40:53,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-23 21:40:53,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-23 21:40:53,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-23 21:40:53,039 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-23 21:40:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:53,421 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-23 21:40:53,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:40:53,422 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-23 21:40:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:53,423 INFO L225 Difference]: With dead ends: 165 [2018-09-23 21:40:53,423 INFO L226 Difference]: Without dead ends: 164 [2018-09-23 21:40:53,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-23 21:40:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-23 21:40:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-23 21:40:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-23 21:40:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-23 21:40:53,429 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-23 21:40:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:53,429 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-23 21:40:53,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-23 21:40:53,429 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-23 21:40:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-23 21:40:53,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:53,430 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-23 21:40:53,430 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:53,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:53,431 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-23 21:40:53,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:53,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:53,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:53,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:53,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:56,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:56,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:40:56,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:40:56,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:40:56,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:56,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-23 21:40:58,301 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-23 21:40:58,502 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:58,502 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:40:58,508 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:40:58,508 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:40:58 BoogieIcfgContainer [2018-09-23 21:40:58,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:40:58,509 INFO L168 Benchmark]: Toolchain (without parser) took 238863.15 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -45.6 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 327.3 MB). Peak memory consumption was 281.7 MB. Max. memory is 7.1 GB. [2018-09-23 21:40:58,510 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:40:58,511 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.49 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. [2018-09-23 21:40:58,511 INFO L168 Benchmark]: Boogie Preprocessor took 27.43 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. [2018-09-23 21:40:58,511 INFO L168 Benchmark]: RCFGBuilder took 246.24 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. [2018-09-23 21:40:58,512 INFO L168 Benchmark]: TraceAbstraction took 238536.85 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -45.6 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 306.2 MB). Peak memory consumption was 260.6 MB. Max. memory is 7.1 GB. [2018-09-23 21:40:58,521 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 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.49 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 27.43 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 246.24 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 238536.85 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -45.6 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 306.2 MB). Peak memory consumption was 260.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 164 with TraceHistMax 81, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 138 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 238.4s OverallTime, 81 OverallIterations, 81 TraceHistogramMax, 19.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13221 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341280 ImplicationChecksByTransitivity, 200.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=80, 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, 80 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 205.1s InterpolantComputationTime, 13117 NumberOfCodeBlocks, 13117 NumberOfCodeBlocksAsserted, 1771 NumberOfCheckSat, 12958 ConstructedInterpolants, 0 QuantifiedInterpolants, 8346212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13272 ConjunctsInSsa, 3397 ConjunctsInUnsatCore, 159 InterpolantComputations, 1 PerfectInterpolantSequences, 0/341280 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/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-40-58-535.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-40-58-535.csv Completed graceful shutdown