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/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:48:32,369 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:48:32,371 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:48:32,383 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:48:32,384 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:48:32,385 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:48:32,386 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:48:32,388 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:48:32,396 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:48:32,397 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:48:32,401 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:48:32,401 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:48:32,402 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:48:32,403 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:48:32,405 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:48:32,406 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:48:32,407 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:48:32,410 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:48:32,413 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:48:32,416 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:48:32,418 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:48:32,419 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:48:32,425 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 23:48:32,438 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 [2018-09-30 23:48:32,465 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:48:32,466 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:48:32,466 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:48:32,467 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:48:32,467 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:48:32,467 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:48:32,468 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:48:32,468 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:48:32,468 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:48:32,468 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:48:32,468 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:48:32,469 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:48:32,469 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:48:32,469 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:48:32,469 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:48:32,471 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:48:32,471 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:48:32,471 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:48:32,471 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:48:32,471 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:48:32,472 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:48:32,472 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:48:32,472 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:48:32,472 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:48:32,473 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:48:32,473 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:48:32,473 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:48:32,473 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:48:32,473 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:48:32,474 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:48:32,539 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:48:32,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:48:32,559 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:48:32,561 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:48:32,562 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:48:32,563 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-30 23:48:32,563 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-09-30 23:48:32,608 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:48:32,611 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:48:32,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:48:32,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:48:32,613 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:48:32,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:32" (1/1) ... [2018-09-30 23:48:32,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:32" (1/1) ... [2018-09-30 23:48:32,652 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:48:32,652 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:48:32,652 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:48:32,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:48:32,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:48:32,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:48:32,656 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:48:32,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:32" (1/1) ... [2018-09-30 23:48:32,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:32" (1/1) ... [2018-09-30 23:48:32,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:32" (1/1) ... [2018-09-30 23:48:32,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:32" (1/1) ... [2018-09-30 23:48:32,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:32" (1/1) ... [2018-09-30 23:48:32,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:32" (1/1) ... [2018-09-30 23:48:32,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:32" (1/1) ... [2018-09-30 23:48:32,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:48:32,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:48:32,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:48:32,678 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:48:32,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:32" (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 [2018-09-30 23:48:32,753 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 23:48:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 23:48:32,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 23:48:32,956 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:48:32,957 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:48:32 BoogieIcfgContainer [2018-09-30 23:48:32,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:48:32,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:48:32,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:48:32,962 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:48:32,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:32" (1/2) ... [2018-09-30 23:48:32,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ce221b and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:48:32, skipping insertion in model container [2018-09-30 23:48:32,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:48:32" (2/2) ... [2018-09-30 23:48:32,965 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-30 23:48:32,976 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:48:32,985 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:48:33,043 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:48:33,044 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:48:33,044 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:48:33,045 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:48:33,045 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:48:33,045 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:48:33,045 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:48:33,045 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:48:33,046 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:48:33,062 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-30 23:48:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-30 23:48:33,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:33,073 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-30 23:48:33,075 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:33,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-30 23:48:33,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:33,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:33,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:33,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:33,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:33,499 WARN L178 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-30 23:48:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:33,504 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:48:33,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 23:48:33,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:48:33,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:48:33,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:48:33,526 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-30 23:48:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:33,603 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 23:48:33,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:48:33,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-30 23:48:33,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:33,617 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:48:33,618 INFO L226 Difference]: Without dead ends: 4 [2018-09-30 23:48:33,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:48:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-30 23:48:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-30 23:48:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-30 23:48:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-30 23:48:33,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-30 23:48:33,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:33,659 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-30 23:48:33,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:48:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-30 23:48:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:48:33,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:33,660 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:48:33,660 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:33,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:33,661 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-30 23:48:33,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:33,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:33,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:33,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:33,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:33,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:33,863 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 [2018-09-30 23:48:33,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:33,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:33,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:33,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 23:48:33,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:48:33,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:48:33,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:48:33,976 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-09-30 23:48:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:34,098 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-30 23:48:34,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:48:34,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-09-30 23:48:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:34,099 INFO L225 Difference]: With dead ends: 6 [2018-09-30 23:48:34,099 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 23:48:34,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:48:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 23:48:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 23:48:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 23:48:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 23:48:34,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 23:48:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:34,105 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 23:48:34,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:48:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 23:48:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:48:34,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:34,107 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-30 23:48:34,107 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:34,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:34,108 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-30 23:48:34,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:34,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:34,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:34,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:34,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:34,465 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-30 23:48:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:34,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:34,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:48:34,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:34,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:34,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:34,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:34,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:34,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 23:48:34,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:48:34,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:48:34,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:48:34,623 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-09-30 23:48:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:34,709 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-30 23:48:34,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:48:34,709 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-09-30 23:48:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:34,710 INFO L225 Difference]: With dead ends: 7 [2018-09-30 23:48:34,711 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 23:48:34,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:48:34,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 23:48:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 23:48:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 23:48:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 23:48:34,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 23:48:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:34,715 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 23:48:34,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:48:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 23:48:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:48:34,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:34,716 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-30 23:48:34,717 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:34,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-30 23:48:34,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:34,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:34,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:34,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:34,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:34,891 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-30 23:48:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:34,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:34,983 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 [2018-09-30 23:48:34,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:35,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:48:35,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:35,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:35,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:35,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 23:48:35,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:48:35,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:48:35,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:48:35,223 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-09-30 23:48:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:35,364 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 23:48:35,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:48:35,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-09-30 23:48:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:35,366 INFO L225 Difference]: With dead ends: 8 [2018-09-30 23:48:35,366 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:48:35,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:48:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:48:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:48:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:48:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:48:35,370 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 23:48:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:35,370 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:48:35,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:48:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:48:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:48:35,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:35,371 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-30 23:48:35,372 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:35,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:35,372 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-30 23:48:35,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:35,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:35,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:35,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:35,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:35,630 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-30 23:48:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:35,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:35,728 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 [2018-09-30 23:48:35,737 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:35,744 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:35,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:35,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:35,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:35,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 23:48:35,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:48:35,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:48:35,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:48:35,907 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-09-30 23:48:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:35,967 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 23:48:35,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:48:35,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-09-30 23:48:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:35,968 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:48:35,968 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:48:35,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:48:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:48:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 23:48:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:48:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 23:48:35,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 23:48:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:35,973 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 23:48:35,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:48:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 23:48:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:48:35,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:35,974 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-30 23:48:35,974 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:35,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:35,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-30 23:48:35,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:35,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:35,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:35,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:35,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:36,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:36,150 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 [2018-09-30 23:48:36,161 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:36,175 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:48:36,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:36,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:36,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:36,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 23:48:36,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:48:36,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:48:36,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:48:36,407 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-09-30 23:48:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:36,537 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 23:48:36,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:48:36,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-09-30 23:48:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:36,541 INFO L225 Difference]: With dead ends: 10 [2018-09-30 23:48:36,541 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:48:36,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:48:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:48:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:48:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:48:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:48:36,545 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 23:48:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:36,546 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:48:36,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:48:36,546 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:48:36,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:48:36,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:36,547 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-30 23:48:36,547 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:36,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:36,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-30 23:48:36,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:36,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:36,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:36,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:36,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:36,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:36,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:48:36,776 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:36,786 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 23:48:36,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:36,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:37,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:37,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 23:48:37,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:48:37,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:48:37,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:48:37,134 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-09-30 23:48:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:37,248 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:48:37,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:48:37,249 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-09-30 23:48:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:37,250 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:48:37,250 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:48:37,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:48:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:48:37,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:48:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:48:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 23:48:37,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 23:48:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:37,255 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 23:48:37,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:48:37,255 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 23:48:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:48:37,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:37,256 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-30 23:48:37,256 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:37,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:37,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-30 23:48:37,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:37,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:37,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:37,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:37,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:37,439 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-09-30 23:48:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:37,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:37,590 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 [2018-09-30 23:48:37,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:37,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:37,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:37,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 23:48:37,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:48:37,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:48:37,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:48:37,816 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-09-30 23:48:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:37,963 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 23:48:37,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:48:37,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-09-30 23:48:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:37,965 INFO L225 Difference]: With dead ends: 12 [2018-09-30 23:48:37,965 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:48:37,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:48:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:48:37,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:48:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:48:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:48:37,969 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 23:48:37,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:37,969 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:48:37,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:48:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:48:37,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:48:37,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:37,970 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-30 23:48:37,971 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:37,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:37,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-30 23:48:37,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:37,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:37,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:37,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:37,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:38,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:38,165 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 [2018-09-30 23:48:38,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:38,200 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:38,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:38,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:38,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:38,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 23:48:38,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:48:38,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:48:38,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:48:38,423 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-09-30 23:48:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:38,549 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:48:38,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:48:38,551 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-09-30 23:48:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:38,551 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:48:38,552 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:48:38,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:48:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:48:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 23:48:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:48:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 23:48:38,556 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 23:48:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:38,556 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 23:48:38,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:48:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 23:48:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:48:38,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:38,557 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-30 23:48:38,557 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:38,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:38,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-30 23:48:38,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:38,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:38,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:38,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:38,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:38,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:38,809 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 [2018-09-30 23:48:38,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:38,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:48:38,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:38,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:39,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:39,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 23:48:39,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:48:39,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:48:39,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:48:39,489 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-09-30 23:48:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:39,652 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 23:48:39,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:48:39,653 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-09-30 23:48:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:39,654 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:48:39,654 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:48:39,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:48:39,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:48:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:48:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:48:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:48:39,658 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 23:48:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:39,658 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:48:39,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:48:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:48:39,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:48:39,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:39,659 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-30 23:48:39,660 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:39,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:39,660 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-30 23:48:39,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:39,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:39,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:39,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:39,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:40,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:40,038 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 [2018-09-30 23:48:40,048 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:40,057 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:40,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:40,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:40,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:40,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 23:48:40,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:48:40,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:48:40,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:48:40,331 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-09-30 23:48:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:40,660 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:48:40,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:48:40,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-09-30 23:48:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:40,662 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:48:40,662 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 23:48:40,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:48:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 23:48:40,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 23:48:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:48:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 23:48:40,667 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 23:48:40,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:40,667 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 23:48:40,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:48:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 23:48:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:48:40,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:40,668 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-30 23:48:40,668 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:40,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:40,669 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-30 23:48:40,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:40,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:40,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:40,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:40,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:41,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:41,008 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 [2018-09-30 23:48:41,018 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:41,032 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:48:41,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:41,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:41,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:41,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 23:48:41,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:48:41,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:48:41,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:48:41,360 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-09-30 23:48:42,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:42,252 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 23:48:42,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:48:42,252 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-09-30 23:48:42,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:42,253 INFO L225 Difference]: With dead ends: 16 [2018-09-30 23:48:42,253 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:48:42,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:48:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:48:42,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:48:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:48:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:48:42,259 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 23:48:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:42,259 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:48:42,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:48:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:48:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:48:42,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:42,260 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-30 23:48:42,260 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:42,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:42,261 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-30 23:48:42,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:42,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:42,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:42,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:42,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:42,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:42,520 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 [2018-09-30 23:48:42,531 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:42,583 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:48:42,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:42,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:43,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:43,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 23:48:43,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:48:43,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:48:43,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:48:43,098 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-09-30 23:48:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:43,293 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:48:43,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:48:43,293 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-09-30 23:48:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:43,294 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:48:43,294 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:48:43,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:48:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:48:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 23:48:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:48:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 23:48:43,300 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 23:48:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:43,300 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 23:48:43,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:48:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 23:48:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:48:43,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:43,301 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-30 23:48:43,301 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:43,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:43,302 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-30 23:48:43,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:43,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:43,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:43,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:43,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:43,722 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-30 23:48:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:43,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:43,871 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 [2018-09-30 23:48:43,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:43,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:44,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:44,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 23:48:44,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:48:44,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:48:44,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:48:44,253 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-09-30 23:48:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:44,485 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 23:48:44,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:48:44,485 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-09-30 23:48:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:44,486 INFO L225 Difference]: With dead ends: 18 [2018-09-30 23:48:44,486 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:48:44,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:48:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:48:44,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:48:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:48:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:48:44,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 23:48:44,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:44,492 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:48:44,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:48:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:48:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:48:44,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:44,493 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-30 23:48:44,493 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:44,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:44,493 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-30 23:48:44,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:44,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:44,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:44,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:44,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:44,765 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:48:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:45,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:45,096 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 [2018-09-30 23:48:45,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:45,126 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:45,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:45,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:45,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:45,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 23:48:45,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:48:45,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:48:45,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:48:45,610 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-09-30 23:48:45,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:45,889 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:48:45,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:48:45,889 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-09-30 23:48:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:45,890 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:48:45,890 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 23:48:45,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:48:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 23:48:45,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 23:48:45,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:48:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 23:48:45,895 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 23:48:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:45,895 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 23:48:45,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:48:45,896 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 23:48:45,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:48:45,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:45,896 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-30 23:48:45,896 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:45,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:45,897 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-30 23:48:45,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:45,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:45,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:45,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:45,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:46,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:46,274 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 [2018-09-30 23:48:46,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:46,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:48:46,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:46,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:46,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:46,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 23:48:46,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:48:46,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:48:46,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:48:46,764 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-09-30 23:48:47,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:47,319 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 23:48:47,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:48:47,319 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-09-30 23:48:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:47,320 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:48:47,320 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:48:47,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:48:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:48:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:48:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:48:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:48:47,325 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 23:48:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:47,326 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:48:47,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:48:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:48:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:48:47,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:47,327 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-30 23:48:47,327 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:47,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-30 23:48:47,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:47,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:47,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:47,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:47,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:47,579 WARN L178 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:48:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:47,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:47,868 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 [2018-09-30 23:48:47,876 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:47,907 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:47,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:47,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:48,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:48,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 23:48:48,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:48:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:48:48,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:48:48,383 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-09-30 23:48:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:48,683 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:48:48,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:48:48,684 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-09-30 23:48:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:48,685 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:48:48,685 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:48:48,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:48:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:48:48,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 23:48:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:48:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 23:48:48,690 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 23:48:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:48,690 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 23:48:48,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:48:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 23:48:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:48:48,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:48,691 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-30 23:48:48,691 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:48,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:48,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-30 23:48:48,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:48,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:48,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:48,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:48,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:49,032 WARN L178 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:48:49,204 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:48:49,394 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:48:49,622 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:48:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:49,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:49,996 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 [2018-09-30 23:48:50,005 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:50,019 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:48:50,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:50,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:50,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:50,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 23:48:50,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:48:50,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:48:50,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:48:50,512 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-09-30 23:48:51,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:51,018 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 23:48:51,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:48:51,019 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-09-30 23:48:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:51,020 INFO L225 Difference]: With dead ends: 22 [2018-09-30 23:48:51,020 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:48:51,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:48:51,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:48:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:48:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:48:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:48:51,025 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 23:48:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:51,025 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:48:51,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:48:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:48:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:48:51,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:51,026 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-30 23:48:51,027 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:51,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:51,027 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-30 23:48:51,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:51,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:51,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:51,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:51,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:51,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:51,511 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 [2018-09-30 23:48:51,521 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:51,535 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 23:48:51,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:51,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:52,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:52,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 23:48:52,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:48:52,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:48:52,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:48:52,195 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-09-30 23:48:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:53,073 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:48:53,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:48:53,073 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-09-30 23:48:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:53,074 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:48:53,074 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:48:53,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:48:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:48:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 23:48:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:48:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 23:48:53,080 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 23:48:53,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:53,080 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 23:48:53,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:48:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 23:48:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:48:53,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:53,081 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-30 23:48:53,081 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:53,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:53,082 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-30 23:48:53,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:53,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:53,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:53,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:53,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:53,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:53,530 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 [2018-09-30 23:48:53,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:53,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:54,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:54,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 23:48:54,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:48:54,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:48:54,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:48:54,424 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-09-30 23:48:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:54,846 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 23:48:54,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:48:54,846 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-09-30 23:48:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:54,847 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:48:54,847 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:48:54,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:48:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:48:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:48:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:48:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:48:54,853 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 23:48:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:54,854 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:48:54,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:48:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:48:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:48:54,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:54,855 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-30 23:48:54,855 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:54,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:54,855 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-30 23:48:54,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:54,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:54,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:54,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:54,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:55,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:55,346 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 [2018-09-30 23:48:55,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:55,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:55,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:55,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:56,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:56,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 23:48:56,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:48:56,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:48:56,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:48:56,179 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-09-30 23:48:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:56,691 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:48:56,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:48:56,692 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-09-30 23:48:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:56,693 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:48:56,693 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:48:56,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:48:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:48:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 23:48:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:48:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 23:48:56,699 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 23:48:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:56,699 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 23:48:56,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:48:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 23:48:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:48:56,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:56,700 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-30 23:48:56,701 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:56,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:56,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-30 23:48:56,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:56,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:56,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:56,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:56,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:57,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:57,464 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 [2018-09-30 23:48:57,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:57,496 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:48:57,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:57,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:58,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:58,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 23:48:58,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:48:58,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:48:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:48:58,572 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-09-30 23:48:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:59,131 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 23:48:59,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:48:59,134 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-09-30 23:48:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:59,135 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:48:59,135 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:48:59,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:48:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:48:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:48:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:48:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:48:59,139 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 23:48:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:59,140 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:48:59,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:48:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:48:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:48:59,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:59,141 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-30 23:48:59,141 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:59,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-30 23:48:59,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:59,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:59,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:59,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:59,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:59,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:59,967 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 [2018-09-30 23:48:59,975 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:59,990 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:59,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:59,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:00,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:00,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 23:49:00,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:49:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:49:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:49:00,991 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-09-30 23:49:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:01,669 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:49:01,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:49:01,669 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-09-30 23:49:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:01,670 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:49:01,670 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:49:01,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:49:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:49:01,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 23:49:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:49:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 23:49:01,676 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 23:49:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:01,677 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 23:49:01,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:49:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 23:49:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:49:01,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:01,678 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-30 23:49:01,678 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:01,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:01,678 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-30 23:49:01,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:01,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:01,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:01,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:01,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:01,890 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:49:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:02,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:02,440 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 [2018-09-30 23:49:02,447 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:49:02,468 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 23:49:02,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:02,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:03,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:03,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 23:49:03,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:49:03,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:49:03,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:49:03,683 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-09-30 23:49:04,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:04,281 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 23:49:04,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:49:04,282 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-09-30 23:49:04,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:04,282 INFO L225 Difference]: With dead ends: 28 [2018-09-30 23:49:04,283 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:49:04,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:49:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:49:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:49:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:49:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:49:04,288 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 23:49:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:04,288 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:49:04,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:49:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:49:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:49:04,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:04,289 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-30 23:49:04,290 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:04,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:04,290 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-30 23:49:04,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:04,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:04,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:04,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:04,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:04,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:04,881 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 [2018-09-30 23:49:04,888 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:49:04,907 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:49:04,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:04,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:06,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:06,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 23:49:06,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:49:06,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:49:06,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:49:06,320 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-09-30 23:49:07,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:07,007 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:49:07,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:49:07,008 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-09-30 23:49:07,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:07,009 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:49:07,009 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:49:07,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:49:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:49:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 23:49:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:49:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 23:49:07,015 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 23:49:07,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:07,015 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 23:49:07,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:49:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 23:49:07,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:49:07,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:07,016 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-30 23:49:07,016 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:07,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:07,017 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-30 23:49:07,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:07,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:07,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:07,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:07,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:07,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:07,902 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 [2018-09-30 23:49:07,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:07,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:08,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:08,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 23:49:08,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:49:08,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:49:08,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:49:08,923 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-09-30 23:49:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:09,504 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 23:49:09,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:49:09,505 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-09-30 23:49:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:09,505 INFO L225 Difference]: With dead ends: 30 [2018-09-30 23:49:09,506 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:49:09,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:49:09,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:49:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:49:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:49:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:49:09,512 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 23:49:09,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:09,512 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:49:09,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:49:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:49:09,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:49:09,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:09,513 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-30 23:49:09,514 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:09,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:09,514 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-30 23:49:09,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:09,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:09,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:09,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:09,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:09,678 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:49:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:10,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:10,363 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 [2018-09-30 23:49:10,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:49:10,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:49:10,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:10,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:11,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:11,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 23:49:11,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:49:11,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:49:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:49:11,533 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-09-30 23:49:12,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:12,150 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:49:12,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:49:12,151 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-09-30 23:49:12,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:12,152 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:49:12,152 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:49:12,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:49:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:49:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 23:49:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:49:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 23:49:12,157 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 23:49:12,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:12,157 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 23:49:12,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:49:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 23:49:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:49:12,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:12,158 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-30 23:49:12,158 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:12,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:12,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-30 23:49:12,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:12,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:12,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:12,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:12,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:12,461 WARN L178 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:49:12,631 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:49:12,807 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:49:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:13,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:13,515 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 [2018-09-30 23:49:13,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:49:13,547 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 23:49:13,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:13,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:14,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:14,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 23:49:14,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:49:14,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:49:14,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:49:14,642 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-09-30 23:49:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:15,364 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 23:49:15,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:49:15,365 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-09-30 23:49:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:15,365 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:49:15,366 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:49:15,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:49:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:49:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:49:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:49:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:49:15,371 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 23:49:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:15,371 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:49:15,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:49:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:49:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:49:15,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:15,372 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-30 23:49:15,372 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:15,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:15,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-30 23:49:15,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:15,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:15,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:15,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:15,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:16,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:16,173 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 [2018-09-30 23:49:16,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:49:16,198 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:49:16,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:16,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:17,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:17,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 23:49:17,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:49:17,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:49:17,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:49:17,427 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-09-30 23:49:18,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:18,314 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:49:18,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:49:18,314 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-09-30 23:49:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:18,315 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:49:18,315 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:49:18,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:49:18,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:49:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 23:49:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:49:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 23:49:18,320 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 23:49:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:18,321 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 23:49:18,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:49:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 23:49:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 23:49:18,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:18,322 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-30 23:49:18,322 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:18,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:18,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-30 23:49:18,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:18,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:18,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:18,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:18,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:18,473 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:49:18,634 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:49:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:19,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:19,311 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 [2018-09-30 23:49:19,324 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:49:19,348 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 23:49:19,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:19,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:21,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:21,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 23:49:21,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:49:21,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:49:21,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:49:21,105 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-09-30 23:49:22,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:22,031 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 23:49:22,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:49:22,032 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-09-30 23:49:22,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:22,033 INFO L225 Difference]: With dead ends: 34 [2018-09-30 23:49:22,033 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:49:22,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:49:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:49:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:49:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:49:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:49:22,040 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 23:49:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:22,040 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:49:22,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:49:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:49:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:49:22,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:22,041 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-30 23:49:22,041 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:22,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:22,042 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-30 23:49:22,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:22,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:22,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:22,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:22,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:23,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:23,034 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 [2018-09-30 23:49:23,044 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:49:23,083 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 23:49:23,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:23,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:24,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:24,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 23:49:24,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:49:24,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:49:24,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:49:24,495 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-09-30 23:49:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:25,636 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:49:25,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:49:25,637 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-09-30 23:49:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:25,637 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:49:25,637 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:49:25,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:49:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:49:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 23:49:25,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:49:25,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 23:49:25,642 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 23:49:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:25,643 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 23:49:25,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:49:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 23:49:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:49:25,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:25,643 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-30 23:49:25,644 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:25,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:25,644 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-30 23:49:25,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:25,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:25,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:25,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:25,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:25,941 WARN L178 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:49:26,120 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:49:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:27,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:27,087 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 [2018-09-30 23:49:27,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:27,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:28,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:28,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 23:49:28,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:49:28,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:49:28,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:49:28,669 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-09-30 23:49:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:30,077 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 23:49:30,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:49:30,077 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-09-30 23:49:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:30,078 INFO L225 Difference]: With dead ends: 36 [2018-09-30 23:49:30,078 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:49:30,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:49:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:49:30,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:49:30,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:49:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:49:30,083 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 23:49:30,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:30,083 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:49:30,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:49:30,083 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:49:30,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:49:30,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:30,084 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-30 23:49:30,084 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:30,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:30,085 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-30 23:49:30,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:30,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:30,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:30,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:30,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:31,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:31,027 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 [2018-09-30 23:49:31,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:49:31,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:49:31,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:31,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:32,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:32,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 23:49:32,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:49:32,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:49:32,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:49:32,547 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-09-30 23:49:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:33,798 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:49:33,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:49:33,798 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-09-30 23:49:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:33,799 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:49:33,799 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:49:33,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:49:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:49:33,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 23:49:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 23:49:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 23:49:33,805 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 23:49:33,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:33,805 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 23:49:33,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:49:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 23:49:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 23:49:33,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:33,806 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-30 23:49:33,806 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:33,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:33,807 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-30 23:49:33,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:33,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:33,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:33,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:33,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:34,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:34,754 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 [2018-09-30 23:49:34,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:49:34,817 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 23:49:34,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:34,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:36,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:36,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 23:49:36,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:49:36,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:49:36,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:49:36,319 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-09-30 23:49:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:37,700 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 23:49:37,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:49:37,701 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-09-30 23:49:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:37,701 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:49:37,701 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:49:37,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:49:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:49:37,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:49:37,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:49:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:49:37,705 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 23:49:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:37,705 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:49:37,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:49:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:49:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:49:37,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:37,706 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-30 23:49:37,706 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:37,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:37,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-30 23:49:37,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:37,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:37,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:37,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:37,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:38,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:38,891 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 [2018-09-30 23:49:38,898 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:49:38,920 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:49:38,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:38,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:40,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:40,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 23:49:40,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:49:40,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:49:40,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:49:40,509 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-09-30 23:49:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:42,033 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:49:42,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:49:42,033 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-09-30 23:49:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:42,034 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:49:42,034 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 23:49:42,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:49:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 23:49:42,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 23:49:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 23:49:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 23:49:42,038 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 23:49:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:42,038 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 23:49:42,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:49:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 23:49:42,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:49:42,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:42,039 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-30 23:49:42,039 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:42,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:42,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-30 23:49:42,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:42,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:42,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:42,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:42,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:42,230 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:49:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:43,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:43,159 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 [2018-09-30 23:49:43,167 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:49:43,198 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:49:43,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:43,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:45,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:45,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 23:49:45,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:49:45,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:49:45,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:49:45,189 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-09-30 23:49:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:46,697 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 23:49:46,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:49:46,697 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-09-30 23:49:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:46,698 INFO L225 Difference]: With dead ends: 40 [2018-09-30 23:49:46,698 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:49:46,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:49:46,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:49:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:49:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:49:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:49:46,702 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 23:49:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:46,703 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:49:46,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:49:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:49:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:49:46,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:46,703 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-30 23:49:46,704 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:46,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-30 23:49:46,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:46,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:46,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:46,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:46,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:47,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:47,842 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 [2018-09-30 23:49:47,851 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:49:47,880 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:49:47,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:47,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:49,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:49,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 23:49:49,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:49:49,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:49:49,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:49:49,868 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-09-30 23:49:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:51,108 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:49:51,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:49:51,108 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-09-30 23:49:51,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:51,109 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:49:51,109 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:49:51,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:49:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:49:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 23:49:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:49:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 23:49:51,114 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 23:49:51,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:51,114 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 23:49:51,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:49:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 23:49:51,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 23:49:51,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:51,115 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-30 23:49:51,115 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:51,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:51,115 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-30 23:49:51,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:51,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:51,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:51,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:51,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:52,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:52,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:49:52,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:52,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:54,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:54,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 23:49:54,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:49:54,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:49:54,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:49:54,351 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-09-30 23:49:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:56,352 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 23:49:56,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:49:56,358 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-09-30 23:49:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:56,358 INFO L225 Difference]: With dead ends: 42 [2018-09-30 23:49:56,358 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:49:56,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:49:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:49:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:49:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:49:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:49:56,362 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 23:49:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:56,362 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:49:56,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:49:56,362 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:49:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:49:56,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:56,363 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-30 23:49:56,363 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:56,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-30 23:49:56,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:56,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:56,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:56,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:56,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:57,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:57,686 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 [2018-09-30 23:49:57,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:49:57,717 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:49:57,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:57,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:59,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:59,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 23:49:59,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:49:59,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:49:59,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:49:59,892 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-09-30 23:50:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:01,610 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:50:01,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:50:01,610 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-09-30 23:50:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:01,611 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:50:01,611 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 23:50:01,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:50:01,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 23:50:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 23:50:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 23:50:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 23:50:01,615 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 23:50:01,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:01,616 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 23:50:01,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:50:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 23:50:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:50:01,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:01,616 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-30 23:50:01,617 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:01,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:01,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-30 23:50:01,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:01,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:01,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:01,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:01,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:01,971 WARN L178 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:50:02,151 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:02,364 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:02,585 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-30 23:50:02,832 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:04,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:04,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:50:04,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:50:04,148 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 23:50:04,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:04,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:06,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:06,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-30 23:50:06,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:50:06,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:50:06,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:50:06,329 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-09-30 23:50:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:07,987 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 23:50:07,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:50:07,988 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-09-30 23:50:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:07,989 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:50:07,989 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:50:07,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:50:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:50:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:50:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:50:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:50:07,994 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 23:50:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:07,994 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:50:07,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:50:07,994 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:50:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:50:07,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:07,995 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-30 23:50:07,995 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:07,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-30 23:50:07,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:07,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:07,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:07,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:07,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:08,321 WARN L178 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:50:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:09,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:09,830 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 [2018-09-30 23:50:09,838 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:50:09,863 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:50:09,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:09,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:12,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:12,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 23:50:12,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:50:12,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:50:12,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:50:12,101 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-09-30 23:50:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:13,669 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:50:13,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:50:13,669 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-09-30 23:50:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:13,670 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:50:13,670 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 23:50:13,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:50:13,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 23:50:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 23:50:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 23:50:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 23:50:13,674 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 23:50:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:13,674 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 23:50:13,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:50:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 23:50:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 23:50:13,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:13,675 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-30 23:50:13,675 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:13,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:13,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-30 23:50:13,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:13,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:13,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:13,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:13,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:13,914 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:50:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:15,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:15,311 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 [2018-09-30 23:50:15,318 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:50:15,424 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 23:50:15,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:15,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:17,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:17,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-30 23:50:17,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:50:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:50:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:50:17,782 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. [2018-09-30 23:50:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:19,528 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 23:50:19,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:50:19,528 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 43 [2018-09-30 23:50:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:19,529 INFO L225 Difference]: With dead ends: 46 [2018-09-30 23:50:19,529 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:50:19,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:50:19,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:50:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:50:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:50:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:50:19,533 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 23:50:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:19,534 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:50:19,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:50:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:50:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:50:19,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:19,534 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-30 23:50:19,534 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:19,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:19,535 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-30 23:50:19,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:19,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:19,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:19,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:19,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:19,859 WARN L178 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:50:20,048 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:20,235 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:21,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:21,574 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 [2018-09-30 23:50:21,581 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:50:21,615 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 23:50:21,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:21,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:24,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:24,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-30 23:50:24,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:50:24,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:50:24,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:50:24,012 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 88 states. [2018-09-30 23:50:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:25,921 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:50:25,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:50:25,921 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 44 [2018-09-30 23:50:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:25,922 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:50:25,922 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:50:25,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:50:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:50:25,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 23:50:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 23:50:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 23:50:25,926 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 23:50:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:25,926 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 23:50:25,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:50:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 23:50:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 23:50:25,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:25,927 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-30 23:50:25,927 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:25,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:25,928 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-30 23:50:25,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:25,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:25,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:25,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:25,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:26,124 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:50:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:27,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:27,447 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 [2018-09-30 23:50:27,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:27,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:30,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:30,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 23:50:30,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:50:30,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:50:30,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:50:30,171 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 90 states. [2018-09-30 23:50:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:32,114 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 23:50:32,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:50:32,115 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 45 [2018-09-30 23:50:32,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:32,116 INFO L225 Difference]: With dead ends: 48 [2018-09-30 23:50:32,116 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:50:32,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:50:32,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:50:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:50:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:50:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:50:32,121 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 23:50:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:32,121 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:50:32,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:50:32,121 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:50:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:50:32,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:32,121 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-30 23:50:32,122 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:32,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:32,122 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-30 23:50:32,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:32,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:32,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:32,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:32,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:32,461 WARN L178 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:50:32,646 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:32,846 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:34,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:34,148 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 [2018-09-30 23:50:34,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:50:34,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:50:34,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:34,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:37,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:37,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-30 23:50:37,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:50:37,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:50:37,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:50:37,047 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 92 states. [2018-09-30 23:50:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:39,497 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:50:39,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:50:39,497 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 46 [2018-09-30 23:50:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:39,498 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:50:39,498 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 23:50:39,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:50:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 23:50:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 23:50:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 23:50:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 23:50:39,503 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 23:50:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:39,503 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 23:50:39,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:50:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 23:50:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:50:39,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:39,504 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-30 23:50:39,504 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:39,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:39,504 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-30 23:50:39,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:39,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:39,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:39,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:39,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:39,678 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:50:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:41,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:41,158 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 [2018-09-30 23:50:41,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:50:41,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 23:50:41,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:41,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:43,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:43,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-30 23:50:43,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:50:43,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:50:43,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:50:43,896 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 94 states. [2018-09-30 23:50:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:46,745 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 23:50:46,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:50:46,745 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 47 [2018-09-30 23:50:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:46,746 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:50:46,746 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:50:46,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:50:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:50:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:50:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:50:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:50:46,750 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 23:50:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:46,750 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:50:46,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:50:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:50:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:50:46,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:46,751 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-30 23:50:46,751 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:46,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:46,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-30 23:50:46,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:46,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:46,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:46,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:46,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:46,938 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:50:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:48,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:48,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:50:48,438 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:50:48,470 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:50:48,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:48,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:51,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:51,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-30 23:50:51,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:50:51,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:50:51,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:50:51,629 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 96 states. [2018-09-30 23:50:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:53,450 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:50:53,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:50:53,450 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 48 [2018-09-30 23:50:53,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:53,451 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:50:53,451 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:50:53,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:50:53,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:50:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 23:50:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 23:50:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 23:50:53,456 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 23:50:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:53,456 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 23:50:53,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:50:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 23:50:53,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:50:53,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:53,457 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-30 23:50:53,457 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:53,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:53,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-30 23:50:53,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:53,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:53,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:53,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:53,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:53,815 WARN L178 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:50:53,986 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:54,211 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:54,413 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:54,655 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:54,932 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:55,273 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:50:55,584 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-30 23:50:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:57,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:57,080 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 [2018-09-30 23:50:57,087 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:50:57,126 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 23:50:57,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:57,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:00,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:00,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 23:51:00,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:51:00,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:51:00,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:51:00,099 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 98 states. [2018-09-30 23:51:02,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:02,997 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 23:51:02,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:51:02,999 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 49 [2018-09-30 23:51:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:03,000 INFO L225 Difference]: With dead ends: 52 [2018-09-30 23:51:03,000 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:51:03,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=241, Invalid=9265, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:51:03,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:51:03,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:51:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:51:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:51:03,004 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 23:51:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:03,004 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:51:03,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:51:03,005 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:51:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:51:03,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:03,005 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-30 23:51:03,005 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:03,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:03,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-30 23:51:03,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:03,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:03,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:03,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:03,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:04,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:04,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:51:04,658 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:51:04,698 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:51:04,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:04,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:08,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:08,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-30 23:51:08,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:51:08,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:51:08,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:51:08,066 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 100 states. [2018-09-30 23:51:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:10,883 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:51:10,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:51:10,883 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 50 [2018-09-30 23:51:10,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:10,884 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:51:10,884 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 23:51:10,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=246, Invalid=9654, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:51:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 23:51:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 23:51:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 23:51:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 23:51:10,890 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 23:51:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:10,890 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 23:51:10,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:51:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 23:51:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 23:51:10,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:10,891 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-30 23:51:10,891 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:10,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:10,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-30 23:51:10,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:10,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:10,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:10,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:10,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:12,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:12,599 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 [2018-09-30 23:51:12,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:12,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:16,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:16,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 23:51:16,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:51:16,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:51:16,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:51:16,087 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 102 states. [2018-09-30 23:51:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:18,343 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 23:51:18,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:51:18,343 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 51 [2018-09-30 23:51:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:18,344 INFO L225 Difference]: With dead ends: 54 [2018-09-30 23:51:18,344 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:51:18,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=251, Invalid=10051, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:51:18,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:51:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:51:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:51:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:51:18,350 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 23:51:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:18,350 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:51:18,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:51:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:51:18,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:51:18,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:18,351 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-30 23:51:18,351 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:18,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:18,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-30 23:51:18,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:18,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:18,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:18,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:18,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:18,692 WARN L178 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:51:18,880 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:51:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:20,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:20,674 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 [2018-09-30 23:51:20,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:20,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:20,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:20,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:24,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:24,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-30 23:51:24,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:51:24,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:51:24,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:51:24,293 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 104 states. [2018-09-30 23:51:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:26,385 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:51:26,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:51:26,386 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 52 [2018-09-30 23:51:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:26,387 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:51:26,387 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 23:51:26,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=256, Invalid=10456, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:51:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 23:51:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 23:51:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 23:51:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 23:51:26,391 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 23:51:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:26,391 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 23:51:26,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:51:26,391 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 23:51:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:51:26,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:26,392 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-30 23:51:26,392 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:26,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:26,392 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-30 23:51:26,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:26,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:26,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:26,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:26,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:28,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:28,294 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 [2018-09-30 23:51:28,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:28,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 23:51:28,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:28,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:32,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:32,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-30 23:51:32,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:51:32,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:51:32,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:51:32,107 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 106 states. [2018-09-30 23:51:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:35,597 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 23:51:35,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:51:35,598 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 53 [2018-09-30 23:51:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:35,599 INFO L225 Difference]: With dead ends: 56 [2018-09-30 23:51:35,599 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:51:35,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=261, Invalid=10869, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:51:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:51:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:51:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:51:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:51:35,603 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 23:51:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:35,604 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:51:35,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:51:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:51:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:51:35,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:35,604 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-30 23:51:35,605 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:35,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-30 23:51:35,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:35,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:35,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:35,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:35,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:37,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:37,709 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 [2018-09-30 23:51:37,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:51:37,748 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:51:37,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:37,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:41,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:41,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 23:51:41,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:51:41,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:51:41,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:51:41,593 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 108 states. [2018-09-30 23:51:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:45,448 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:51:45,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:51:45,448 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 54 [2018-09-30 23:51:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:45,449 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:51:45,449 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 23:51:45,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=266, Invalid=11290, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:51:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 23:51:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 23:51:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:51:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 23:51:45,454 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 23:51:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:45,454 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 23:51:45,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:51:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 23:51:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 23:51:45,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:45,454 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-30 23:51:45,455 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:45,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:45,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-30 23:51:45,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:45,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:45,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:45,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:45,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:47,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:47,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:47,704 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:51:47,754 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 23:51:47,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:47,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:51,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:51,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-30 23:51:51,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:51:51,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:51:51,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:51:51,776 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 110 states. [2018-09-30 23:51:55,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:55,629 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 23:51:55,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:51:55,630 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 55 [2018-09-30 23:51:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:55,631 INFO L225 Difference]: With dead ends: 58 [2018-09-30 23:51:55,631 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:51:55,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=271, Invalid=11719, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:51:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:51:55,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:51:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:51:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 23:51:55,634 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 23:51:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:55,635 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 23:51:55,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:51:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 23:51:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:51:55,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:55,636 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-30 23:51:55,636 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:55,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:55,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-30 23:51:55,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:55,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:55,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:55,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:55,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:55,819 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:51:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:57,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:57,972 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 [2018-09-30 23:51:57,979 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:51:58,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 23:51:58,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:58,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:02,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:02,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-30 23:52:02,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:52:02,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:52:02,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:52:02,110 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 112 states. [2018-09-30 23:52:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:05,846 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 23:52:05,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:52:05,846 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 56 [2018-09-30 23:52:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:05,847 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:52:05,847 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 23:52:05,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=276, Invalid=12156, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:52:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 23:52:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 23:52:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 23:52:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 23:52:05,852 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 23:52:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:05,852 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 23:52:05,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:52:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 23:52:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 23:52:05,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:05,853 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-30 23:52:05,853 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:05,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-30 23:52:05,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:05,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:05,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:05,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:05,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:08,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:08,274 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 [2018-09-30 23:52:08,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:08,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:12,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:12,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 23:52:12,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:52:12,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:52:12,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:52:12,480 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 114 states. [2018-09-30 23:52:16,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:16,450 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 23:52:16,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:52:16,451 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 57 [2018-09-30 23:52:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:16,452 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:52:16,452 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:52:16,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=281, Invalid=12601, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:52:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:52:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:52:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:52:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:52:16,457 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 23:52:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:16,457 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:52:16,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:52:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:52:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:52:16,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:16,458 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-30 23:52:16,458 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:16,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:16,458 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-30 23:52:16,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:16,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:16,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:16,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:16,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:16,772 WARN L178 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:52:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:19,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:19,113 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 [2018-09-30 23:52:19,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:19,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:19,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:19,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:23,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:23,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-30 23:52:23,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:52:23,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:52:23,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:52:23,479 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 116 states. [2018-09-30 23:52:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:27,669 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:52:27,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:52:27,670 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 58 [2018-09-30 23:52:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:27,671 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:52:27,671 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 23:52:27,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=286, Invalid=13054, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:52:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 23:52:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 23:52:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 23:52:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 23:52:27,675 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 23:52:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:27,675 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 23:52:27,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:52:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 23:52:27,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 23:52:27,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:27,676 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-30 23:52:27,677 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:27,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:27,677 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-30 23:52:27,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:27,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:27,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:27,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:27,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:28,290 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:52:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:30,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:30,373 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 [2018-09-30 23:52:30,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:30,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 23:52:30,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:30,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:34,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:34,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-30 23:52:34,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:52:34,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:52:34,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:52:34,958 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 118 states. [2018-09-30 23:52:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:39,496 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 23:52:39,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:52:39,497 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 59 [2018-09-30 23:52:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:39,498 INFO L225 Difference]: With dead ends: 62 [2018-09-30 23:52:39,498 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:52:39,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=291, Invalid=13515, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:52:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:52:39,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:52:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:52:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 23:52:39,503 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 23:52:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:39,504 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 23:52:39,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:52:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 23:52:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:52:39,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:39,504 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-30 23:52:39,505 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:39,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-30 23:52:39,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:39,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:39,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:39,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:39,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:39,692 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:52:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:41,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:41,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:52:41,974 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:42,010 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:42,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:42,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:47,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:47,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 23:52:47,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:52:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:52:47,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=13984, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:52:47,063 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 120 states. [2018-09-30 23:52:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:52,152 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 23:52:52,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:52:52,152 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 60 [2018-09-30 23:52:52,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:52,153 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:52:52,153 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 23:52:52,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=296, Invalid=13984, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:52:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 23:52:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 23:52:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 23:52:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 23:52:52,158 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 23:52:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:52,159 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 23:52:52,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:52:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 23:52:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 23:52:52,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:52,159 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-09-30 23:52:52,159 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:52,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-09-30 23:52:52,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:52,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:52,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:52,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:52,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:54,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:54,742 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 [2018-09-30 23:52:54,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:54,798 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 23:52:54,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:54,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:59,459 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:59,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-30 23:52:59,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:52:59,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:52:59,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=14461, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:52:59,460 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 122 states. [2018-09-30 23:53:04,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:04,409 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 23:53:04,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:53:04,410 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 61 [2018-09-30 23:53:04,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:04,411 INFO L225 Difference]: With dead ends: 64 [2018-09-30 23:53:04,411 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:53:04,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=301, Invalid=14461, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:53:04,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:53:04,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:53:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:53:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:53:04,417 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 23:53:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:04,417 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:53:04,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:53:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:53:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:53:04,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:04,418 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-09-30 23:53:04,418 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:04,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:04,418 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-09-30 23:53:04,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:04,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:04,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:04,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:04,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:04,771 WARN L178 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:53:04,962 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:53:05,170 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:53:05,357 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:53:05,620 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:53:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:08,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:08,213 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 [2018-09-30 23:53:08,221 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:08,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:53:08,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:08,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:13,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:13,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-30 23:53:13,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 23:53:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 23:53:13,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=14946, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:53:13,153 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 124 states. [2018-09-30 23:53:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:17,044 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:53:17,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:53:17,045 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 62 [2018-09-30 23:53:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:17,046 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:53:17,046 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 23:53:17,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=306, Invalid=14946, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:53:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 23:53:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 23:53:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 23:53:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 23:53:17,051 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 23:53:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:17,051 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 23:53:17,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 23:53:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 23:53:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 23:53:17,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:17,051 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-09-30 23:53:17,052 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:17,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:17,052 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-09-30 23:53:17,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:17,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:17,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:17,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:17,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:19,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:19,788 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 [2018-09-30 23:53:19,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:19,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:24,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:24,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 23:53:24,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:53:24,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:53:24,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=15439, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:53:24,956 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 126 states. [2018-09-30 23:53:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:28,906 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 23:53:28,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:53:28,906 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 63 [2018-09-30 23:53:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:28,907 INFO L225 Difference]: With dead ends: 66 [2018-09-30 23:53:28,907 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:53:28,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=311, Invalid=15439, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:53:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:53:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:53:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:53:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 23:53:28,911 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 23:53:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:28,912 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 23:53:28,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:53:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 23:53:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:53:28,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:28,912 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-09-30 23:53:28,913 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:28,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-09-30 23:53:28,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:28,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:28,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:28,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:28,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:31,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:31,461 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 [2018-09-30 23:53:31,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:31,515 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:31,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:31,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:36,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:36,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-30 23:53:36,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 23:53:36,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 23:53:36,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=15940, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:53:36,794 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 128 states. [2018-09-30 23:53:41,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:41,622 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 23:53:41,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:53:41,622 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 64 [2018-09-30 23:53:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:41,623 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:53:41,623 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 23:53:41,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=316, Invalid=15940, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:53:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 23:53:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 23:53:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 23:53:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 23:53:41,629 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 23:53:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:41,629 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 23:53:41,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 23:53:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 23:53:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 23:53:41,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:41,630 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-09-30 23:53:41,630 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:41,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-09-30 23:53:41,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:41,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:41,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:41,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:41,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:41,864 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:53:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:44,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:44,738 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 [2018-09-30 23:53:44,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:44,807 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 23:53:44,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:44,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:50,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:50,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-30 23:53:50,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:53:50,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:53:50,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=16449, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:53:50,213 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 130 states. [2018-09-30 23:53:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:55,792 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 23:53:55,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:53:55,793 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 65 [2018-09-30 23:53:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:55,794 INFO L225 Difference]: With dead ends: 68 [2018-09-30 23:53:55,794 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:53:55,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=321, Invalid=16449, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:53:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:53:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:53:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:53:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:53:55,799 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 23:53:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:55,799 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:53:55,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:53:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:53:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:53:55,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:55,800 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-09-30 23:53:55,800 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:55,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:55,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-09-30 23:53:55,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:55,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:55,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:55,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:55,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:56,165 WARN L178 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:53:56,340 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:53:56,548 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:53:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:59,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:59,319 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 [2018-09-30 23:53:59,330 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:59,382 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:59,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:59,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:05,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:05,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 23:54:05,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 23:54:05,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 23:54:05,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=16966, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:54:05,175 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 132 states. [2018-09-30 23:54:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:10,025 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:54:10,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:54:10,025 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 66 [2018-09-30 23:54:10,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:10,026 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:54:10,026 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 23:54:10,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=326, Invalid=16966, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:54:10,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 23:54:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 23:54:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 23:54:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 23:54:10,031 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 23:54:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:10,032 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 23:54:10,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 23:54:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 23:54:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 23:54:10,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:10,032 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-09-30 23:54:10,032 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:10,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:10,033 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-09-30 23:54:10,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:10,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:10,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:10,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:10,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:12,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:12,862 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 [2018-09-30 23:54:12,868 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:12,923 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 23:54:12,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:12,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:18,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:18,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-30 23:54:18,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 23:54:18,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 23:54:18,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=17491, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:54:18,617 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 134 states. [2018-09-30 23:54:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:23,359 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 23:54:23,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:54:23,360 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 67 [2018-09-30 23:54:23,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:23,361 INFO L225 Difference]: With dead ends: 70 [2018-09-30 23:54:23,361 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:54:23,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=331, Invalid=17491, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:54:23,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:54:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:54:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:54:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 23:54:23,366 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 23:54:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:23,366 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 23:54:23,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 23:54:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 23:54:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:54:23,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:23,367 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-09-30 23:54:23,367 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:23,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:23,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-09-30 23:54:23,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:23,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:23,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:23,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:23,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:26,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:26,475 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 [2018-09-30 23:54:26,492 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:26,555 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 23:54:26,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:26,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:32,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:32,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-30 23:54:32,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 23:54:32,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 23:54:32,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=18024, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:54:32,459 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 136 states. [2018-09-30 23:54:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:38,506 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 23:54:38,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:54:38,506 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 68 [2018-09-30 23:54:38,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:38,507 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:54:38,507 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 23:54:38,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=336, Invalid=18024, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:54:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 23:54:38,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 23:54:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 23:54:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 23:54:38,511 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 23:54:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:38,512 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 23:54:38,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 23:54:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 23:54:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 23:54:38,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:38,512 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-09-30 23:54:38,513 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:38,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:38,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-09-30 23:54:38,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:38,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:38,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:38,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:38,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:41,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:41,775 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 [2018-09-30 23:54:41,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:41,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:47,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:47,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 23:54:47,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:54:47,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:54:47,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=18565, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:54:47,844 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 138 states. [2018-09-30 23:54:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:52,047 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 23:54:52,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:54:52,047 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 69 [2018-09-30 23:54:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:52,048 INFO L225 Difference]: With dead ends: 72 [2018-09-30 23:54:52,048 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:54:52,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=341, Invalid=18565, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:54:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:54:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:54:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:54:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 23:54:52,053 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 23:54:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:52,054 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 23:54:52,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:54:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 23:54:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:54:52,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:52,054 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-09-30 23:54:52,055 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:52,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:52,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-09-30 23:54:52,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:52,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:52,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:52,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:52,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:52,417 WARN L178 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:54:52,615 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:54:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:55,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:55,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:54:55,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:54:55,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:54:55,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:55,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:02,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:02,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-30 23:55:02,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 23:55:02,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 23:55:02,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=19114, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:55:02,203 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 140 states. [2018-09-30 23:55:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:08,018 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 23:55:08,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:55:08,018 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 70 [2018-09-30 23:55:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:08,019 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:55:08,019 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 23:55:08,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=346, Invalid=19114, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:55:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 23:55:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 23:55:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 23:55:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 23:55:08,024 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 23:55:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:08,024 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 23:55:08,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 23:55:08,024 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 23:55:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 23:55:08,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:08,025 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-09-30 23:55:08,025 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:08,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-09-30 23:55:08,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:08,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:08,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:08,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:08,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:08,292 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:55:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:11,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:11,544 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 [2018-09-30 23:55:11,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:55:11,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 23:55:11,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:11,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:18,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:18,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-30 23:55:18,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 23:55:18,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 23:55:18,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=19671, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:55:18,059 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 142 states. [2018-09-30 23:55:23,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:23,487 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 23:55:23,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:55:23,487 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 71 [2018-09-30 23:55:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:23,488 INFO L225 Difference]: With dead ends: 74 [2018-09-30 23:55:23,488 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:55:23,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=351, Invalid=19671, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:55:23,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:55:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:55:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:55:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 23:55:23,494 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 23:55:23,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:23,495 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 23:55:23,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 23:55:23,495 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 23:55:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:55:23,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:23,495 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-09-30 23:55:23,496 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:23,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:23,496 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-09-30 23:55:23,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:23,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:23,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:23,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:23,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:26,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:26,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:55:26,910 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:55:26,955 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:55:26,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:26,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:34,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:34,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-30 23:55:34,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 23:55:34,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 23:55:34,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=20236, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:55:34,426 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 144 states. [2018-09-30 23:55:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:41,276 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 23:55:41,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:55:41,277 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 72 [2018-09-30 23:55:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:41,278 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:55:41,278 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 23:55:41,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=356, Invalid=20236, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:55:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 23:55:41,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 23:55:41,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 23:55:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 23:55:41,284 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 23:55:41,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:41,284 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 23:55:41,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 23:55:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 23:55:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 23:55:41,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:41,285 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-09-30 23:55:41,285 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:41,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:41,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-09-30 23:55:41,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:41,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:41,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:41,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:41,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:44,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:44,854 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 [2018-09-30 23:55:44,862 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:55:44,980 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 23:55:44,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:44,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:51,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:51,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-30 23:55:51,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 23:55:51,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 23:55:51,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=20809, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:55:51,836 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 146 states. [2018-09-30 23:55:57,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:57,140 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 23:55:57,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:55:57,140 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 73 [2018-09-30 23:55:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:57,141 INFO L225 Difference]: With dead ends: 76 [2018-09-30 23:55:57,142 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:55:57,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=361, Invalid=20809, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:55:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:55:57,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:55:57,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:55:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 23:55:57,148 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 23:55:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:57,148 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 23:55:57,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 23:55:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 23:55:57,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:55:57,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:57,149 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-09-30 23:55:57,150 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:57,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:57,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-09-30 23:55:57,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:57,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:57,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:57,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:57,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:00,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:00,642 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 [2018-09-30 23:56:00,649 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:00,751 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:56:00,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:00,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:08,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:08,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-30 23:56:08,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 23:56:08,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 23:56:08,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=21390, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:56:08,110 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 148 states. [2018-09-30 23:56:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:14,683 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 23:56:14,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:56:14,683 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 74 [2018-09-30 23:56:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:14,684 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:56:14,684 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 23:56:14,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=366, Invalid=21390, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:56:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 23:56:14,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 23:56:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 23:56:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 23:56:14,691 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 23:56:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:14,691 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 23:56:14,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 23:56:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 23:56:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 23:56:14,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:14,692 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-09-30 23:56:14,692 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:14,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:14,692 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-09-30 23:56:14,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:14,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:14,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:14,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:14,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:18,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:18,404 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 [2018-09-30 23:56:18,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:18,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:26,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:26,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-30 23:56:26,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 23:56:26,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 23:56:26,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=21979, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:56:26,002 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 150 states. [2018-09-30 23:56:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:31,358 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 23:56:31,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:56:31,359 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 75 [2018-09-30 23:56:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:31,360 INFO L225 Difference]: With dead ends: 78 [2018-09-30 23:56:31,360 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:56:31,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=371, Invalid=21979, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:56:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:56:31,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:56:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:56:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 23:56:31,366 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 23:56:31,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:31,367 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 23:56:31,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 23:56:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 23:56:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:56:31,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:31,368 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-09-30 23:56:31,368 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:31,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-09-30 23:56:31,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:31,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:31,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:31,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:31,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:31,744 WARN L178 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:56:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:35,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:35,490 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 [2018-09-30 23:56:35,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:35,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:35,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:35,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:42,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-30 23:56:42,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 23:56:42,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 23:56:42,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=22576, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:56:42,963 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 152 states. [2018-09-30 23:56:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:50,634 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 23:56:50,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:56:50,634 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 76 [2018-09-30 23:56:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:50,635 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:56:50,635 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 23:56:50,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=376, Invalid=22576, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:56:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 23:56:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 23:56:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 23:56:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 23:56:50,641 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 23:56:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:50,641 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 23:56:50,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 23:56:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 23:56:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 23:56:50,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:50,642 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-09-30 23:56:50,642 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:50,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:50,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-09-30 23:56:50,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:50,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:50,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:50,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:54,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:54,615 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 [2018-09-30 23:56:54,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:54,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 23:56:54,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:54,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:02,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:02,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-30 23:57:02,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 23:57:02,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 23:57:02,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=23181, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:57:02,223 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 154 states. [2018-09-30 23:57:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:09,270 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 23:57:09,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:57:09,271 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 77 [2018-09-30 23:57:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:09,271 INFO L225 Difference]: With dead ends: 80 [2018-09-30 23:57:09,272 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:57:09,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=381, Invalid=23181, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:57:09,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:57:09,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:57:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:57:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 23:57:09,277 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 23:57:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:09,277 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 23:57:09,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 23:57:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 23:57:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:57:09,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:09,278 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-09-30 23:57:09,278 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:09,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:09,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-09-30 23:57:09,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:09,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:09,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:09,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:09,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:13,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:13,091 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 [2018-09-30 23:57:13,098 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:13,143 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:13,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:13,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:21,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:21,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-30 23:57:21,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 23:57:21,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 23:57:21,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=23794, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:57:21,910 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 156 states. [2018-09-30 23:57:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:27,932 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 23:57:27,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:57:27,933 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 78 [2018-09-30 23:57:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:27,934 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:57:27,934 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 23:57:27,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=386, Invalid=23794, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:57:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 23:57:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 23:57:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 23:57:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 23:57:27,939 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 23:57:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:27,939 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 23:57:27,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 23:57:27,940 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 23:57:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 23:57:27,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:27,940 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-09-30 23:57:27,940 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:27,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-09-30 23:57:27,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:27,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:27,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:27,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:27,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:31,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:31,997 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 [2018-09-30 23:57:32,004 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:32,082 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 23:57:32,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:32,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:40,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:40,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-30 23:57:40,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 23:57:40,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 23:57:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=24415, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:57:40,233 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 158 states. [2018-09-30 23:57:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:46,705 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 23:57:46,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:57:46,706 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 79 [2018-09-30 23:57:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:46,707 INFO L225 Difference]: With dead ends: 82 [2018-09-30 23:57:46,707 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:57:46,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=391, Invalid=24415, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:57:46,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:57:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:57:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:57:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 23:57:46,712 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 23:57:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:46,712 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 23:57:46,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 23:57:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 23:57:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:57:46,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:46,713 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-09-30 23:57:46,713 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:46,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-09-30 23:57:46,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:46,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:46,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:46,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:46,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:50,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:50,924 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 [2018-09-30 23:57:50,931 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:51,006 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 23:57:51,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:51,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:59,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:59,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-30 23:57:59,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 23:57:59,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 23:57:59,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=25044, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:57:59,069 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 160 states. [2018-09-30 23:58:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:08,097 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 23:58:08,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:58:08,097 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 80 [2018-09-30 23:58:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:08,098 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:58:08,098 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 23:58:08,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=396, Invalid=25044, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:58:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 23:58:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 23:58:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 23:58:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 23:58:08,104 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 23:58:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:08,105 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 23:58:08,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 23:58:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 23:58:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 23:58:08,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:08,105 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-09-30 23:58:08,106 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:08,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:08,106 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-09-30 23:58:08,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:08,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:08,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:08,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:08,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:08,492 WARN L178 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-09-30 23:58:08,686 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:58:08,908 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:58:09,151 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-30 23:58:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:13,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:13,398 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 [2018-09-30 23:58:13,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:13,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:22,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:22,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-30 23:58:22,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 23:58:22,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 23:58:22,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=25681, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:58:22,072 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 162 states. [2018-09-30 23:58:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:30,200 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 23:58:30,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:58:30,200 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 81 [2018-09-30 23:58:30,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:30,202 INFO L225 Difference]: With dead ends: 84 [2018-09-30 23:58:30,202 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:58:30,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=401, Invalid=25681, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:58:30,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:58:30,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:58:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:58:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 23:58:30,207 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 23:58:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:30,208 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 23:58:30,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 23:58:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 23:58:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:58:30,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:30,208 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-09-30 23:58:30,209 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:30,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:30,209 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-09-30 23:58:30,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:30,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:30,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:30,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:30,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:34,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:34,655 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 [2018-09-30 23:58:34,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:34,707 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:34,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:34,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:43,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:43,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-09-30 23:58:43,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 23:58:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 23:58:43,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=26326, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:58:43,422 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 164 states. [2018-09-30 23:58:50,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:50,795 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 23:58:50,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:58:50,795 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 82 [2018-09-30 23:58:50,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:50,796 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:58:50,796 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 23:58:50,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=406, Invalid=26326, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:58:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 23:58:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 23:58:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 23:58:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 23:58:50,802 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 23:58:50,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:50,802 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 23:58:50,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 23:58:50,802 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 23:58:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 23:58:50,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:50,803 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-09-30 23:58:50,803 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:50,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:50,804 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-09-30 23:58:50,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:50,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:50,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:50,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:55,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:55,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:55,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:55,415 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 23:58:55,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:55,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:04,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:04,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 164 [2018-09-30 23:59:04,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 23:59:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 23:59:04,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=26979, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:59:04,326 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 166 states. [2018-09-30 23:59:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:11,344 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 23:59:11,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:59:11,345 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 83 [2018-09-30 23:59:11,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:11,346 INFO L225 Difference]: With dead ends: 86 [2018-09-30 23:59:11,346 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:59:11,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=411, Invalid=26979, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:59:11,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:59:11,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:59:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:59:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 23:59:11,351 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 23:59:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:11,351 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 23:59:11,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 23:59:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 23:59:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:59:11,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:11,351 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1] [2018-09-30 23:59:11,352 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:11,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:11,352 INFO L82 PathProgramCache]: Analyzing trace with hash 956131591, now seen corresponding path program 82 times [2018-09-30 23:59:11,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:11,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:11,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:11,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:16,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:16,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:16,031 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:16,090 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:16,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:16,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:25,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:25,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 166 [2018-09-30 23:59:25,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-30 23:59:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-30 23:59:25,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=27640, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:59:25,287 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 168 states. [2018-09-30 23:59:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:32,273 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 23:59:32,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:59:32,273 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 84 [2018-09-30 23:59:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:32,274 INFO L225 Difference]: With dead ends: 87 [2018-09-30 23:59:32,274 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 23:59:32,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=416, Invalid=27640, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:59:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 23:59:32,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 23:59:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 23:59:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 23:59:32,281 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 23:59:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:32,281 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 23:59:32,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-30 23:59:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 23:59:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 23:59:32,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:32,282 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1] [2018-09-30 23:59:32,282 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:32,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:32,283 INFO L82 PathProgramCache]: Analyzing trace with hash -424691807, now seen corresponding path program 83 times [2018-09-30 23:59:32,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:32,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:32,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:32,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:32,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:36,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:36,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:36,787 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:36,862 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 23:59:36,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:36,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:46,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:46,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 168 [2018-09-30 23:59:46,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-09-30 23:59:46,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-09-30 23:59:46,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=28309, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:59:46,316 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 170 states. [2018-09-30 23:59:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:53,400 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 23:59:53,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:59:53,401 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 85 [2018-09-30 23:59:53,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:53,402 INFO L225 Difference]: With dead ends: 88 [2018-09-30 23:59:53,402 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:59:53,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=421, Invalid=28309, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:59:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:59:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 23:59:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:59:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 23:59:53,408 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 23:59:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:53,409 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 23:59:53,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-09-30 23:59:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 23:59:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:59:53,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:53,410 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1] [2018-09-30 23:59:53,410 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:53,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash -280544185, now seen corresponding path program 84 times [2018-09-30 23:59:53,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:53,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:53,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:53,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:53,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:58,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:58,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:58,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:58,338 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 23:59:58,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:58,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:07,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 170 [2018-10-01 00:00:07,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-10-01 00:00:07,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-10-01 00:00:07,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=28986, Unknown=0, NotChecked=0, Total=29412 [2018-10-01 00:00:07,644 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 172 states. [2018-10-01 00:00:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:14,845 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-01 00:00:14,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-01 00:00:14,845 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 86 [2018-10-01 00:00:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:14,846 INFO L225 Difference]: With dead ends: 89 [2018-10-01 00:00:14,846 INFO L226 Difference]: Without dead ends: 88 [2018-10-01 00:00:14,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=426, Invalid=28986, Unknown=0, NotChecked=0, Total=29412 [2018-10-01 00:00:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-01 00:00:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-01 00:00:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-01 00:00:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-01 00:00:14,853 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-01 00:00:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:14,853 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-01 00:00:14,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-10-01 00:00:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-01 00:00:14,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-01 00:00:14,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:14,854 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1] [2018-10-01 00:00:14,854 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:14,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:14,854 INFO L82 PathProgramCache]: Analyzing trace with hash -106935199, now seen corresponding path program 85 times [2018-10-01 00:00:14,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:14,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:14,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:14,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:14,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:19,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:19,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:19,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:19,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:29,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:29,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 172 [2018-10-01 00:00:29,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-10-01 00:00:29,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-10-01 00:00:29,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=29671, Unknown=0, NotChecked=0, Total=30102 [2018-10-01 00:00:29,585 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 174 states. [2018-10-01 00:00:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:36,879 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-01 00:00:36,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-01 00:00:36,879 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 87 [2018-10-01 00:00:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:36,880 INFO L225 Difference]: With dead ends: 90 [2018-10-01 00:00:36,881 INFO L226 Difference]: Without dead ends: 89 [2018-10-01 00:00:36,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=431, Invalid=29671, Unknown=0, NotChecked=0, Total=30102 [2018-10-01 00:00:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-01 00:00:36,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-01 00:00:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-01 00:00:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-01 00:00:36,887 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-01 00:00:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:36,887 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-01 00:00:36,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-10-01 00:00:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-01 00:00:36,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-01 00:00:36,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:36,888 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1] [2018-10-01 00:00:36,888 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:36,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash 979976071, now seen corresponding path program 86 times [2018-10-01 00:00:36,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:36,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:36,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:36,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:36,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:42,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:42,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:42,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:42,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:42,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:42,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:52,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:52,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 174 [2018-10-01 00:00:52,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-10-01 00:00:52,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-10-01 00:00:52,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=30364, Unknown=0, NotChecked=0, Total=30800 [2018-10-01 00:00:52,015 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 176 states. [2018-10-01 00:00:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:59,902 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-01 00:00:59,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-01 00:00:59,902 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 88 [2018-10-01 00:00:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:59,903 INFO L225 Difference]: With dead ends: 91 [2018-10-01 00:00:59,903 INFO L226 Difference]: Without dead ends: 90 [2018-10-01 00:00:59,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=436, Invalid=30364, Unknown=0, NotChecked=0, Total=30800 [2018-10-01 00:00:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-01 00:00:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-01 00:00:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-01 00:00:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-01 00:00:59,910 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-01 00:00:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:59,910 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-01 00:00:59,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-10-01 00:00:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-01 00:00:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-01 00:00:59,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:59,910 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1] [2018-10-01 00:00:59,911 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:59,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:59,911 INFO L82 PathProgramCache]: Analyzing trace with hash 314487073, now seen corresponding path program 87 times [2018-10-01 00:00:59,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:59,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:59,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:59,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:59,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:04,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:04,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:04,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:05,026 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-01 00:01:05,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:05,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:15,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:15,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 176 [2018-10-01 00:01:15,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-10-01 00:01:15,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-10-01 00:01:15,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=31065, Unknown=0, NotChecked=0, Total=31506 [2018-10-01 00:01:15,229 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 178 states. [2018-10-01 00:01:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:23,961 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-01 00:01:23,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-01 00:01:23,961 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 89 [2018-10-01 00:01:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:23,962 INFO L225 Difference]: With dead ends: 92 [2018-10-01 00:01:23,962 INFO L226 Difference]: Without dead ends: 91 [2018-10-01 00:01:23,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=441, Invalid=31065, Unknown=0, NotChecked=0, Total=31506 [2018-10-01 00:01:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-01 00:01:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-01 00:01:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-01 00:01:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-01 00:01:23,967 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-01 00:01:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:23,968 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-01 00:01:23,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-10-01 00:01:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-01 00:01:23,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 00:01:23,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:23,968 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1] [2018-10-01 00:01:23,968 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:23,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:23,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164615, now seen corresponding path program 88 times [2018-10-01 00:01:23,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:23,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:23,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:23,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:23,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:29,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:29,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:29,148 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:29,207 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:29,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:29,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-01 00:01:30,889 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-01 00:01:31,090 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:31,090 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:01:31,097 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:01:31,097 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:01:31 BoogieIcfgContainer [2018-10-01 00:01:31,097 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:01:31,098 INFO L168 Benchmark]: Toolchain (without parser) took 778489.80 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -439.9 MB). Free memory was 1.5 GB in the beginning and 801.3 MB in the end (delta: 674.8 MB). Peak memory consumption was 234.9 MB. Max. memory is 7.1 GB. [2018-10-01 00:01:31,099 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:01:31,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.78 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:01:31,099 INFO L168 Benchmark]: Boogie Preprocessor took 21.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:01:31,100 INFO L168 Benchmark]: RCFGBuilder took 280.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:01:31,100 INFO L168 Benchmark]: TraceAbstraction took 778139.36 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -439.9 MB). Free memory was 1.5 GB in the beginning and 801.3 MB in the end (delta: 653.7 MB). Peak memory consumption was 213.8 MB. Max. memory is 7.1 GB. [2018-10-01 00:01:31,102 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 0.17 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 42.78 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 21.51 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 280.01 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 778139.36 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -439.9 MB). Free memory was 1.5 GB in the beginning and 801.3 MB in the end (delta: 653.7 MB). Peak memory consumption was 213.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was analyzing trace of length 91 with TraceHistMax 88, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 106 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 778.0s OverallTime, 89 OverallIterations, 88 TraceHistogramMax, 267.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 177 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 358145 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 224.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7831 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7831 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113564 ImplicationChecksByTransitivity, 489.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=88, 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, 88 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 494.9s InterpolantComputationTime, 8006 NumberOfCodeBlocks, 8006 NumberOfCodeBlocksAsserted, 1179 NumberOfCheckSat, 7831 ConstructedInterpolants, 0 QuantifiedInterpolants, 6059525 SizeOfPredicates, 0 NumberOfNonLiveVariables, 15921 ConjunctsInSsa, 15660 ConjunctsInUnsatCore, 175 InterpolantComputations, 1 PerfectInterpolantSequences, 0/227128 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/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-01-31-109.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-01-31-109.csv Completed graceful shutdown